<XBRL>
<?xml version="1.0" encoding="us-ascii" standalone="no"?>
<!--XBRL document created with Bowne Tagger XBRL Enabler by Bowne Software version 10.0.0.108-->
<!--Based on XBRL 2.1-->
<!--Modified on: 4/26/2011 10:29:22 AM-->
<linkbase xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#FixedAssetsDetails" roleURI="http://slb.com/role/FixedAssetsDetails" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#MulticlientSeismicDataTables" roleURI="http://slb.com/role/MulticlientSeismicDataTables" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#MulticlientSeismicDataDetails" roleURI="http://slb.com/role/MulticlientSeismicDataDetails" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#GoodwillTables" roleURI="http://slb.com/role/GoodwillTables" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#GoodwillDetails" roleURI="http://slb.com/role/GoodwillDetails" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#AcquisitionsDetails" roleURI="http://slb.com/role/AcquisitionsDetails" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#IntangibleAssetsDetails" roleURI="http://slb.com/role/IntangibleAssetsDetails" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#IntangibleAssetsTables" roleURI="http://slb.com/role/IntangibleAssetsTables" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#DerivativeInstrumentsAndHedgingActivitiesDetails" roleURI="http://slb.com/role/DerivativeInstrumentsAndHedgingActivitiesDetails" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#DerivativeInstrumentsAndHedgingActivitiesDetails3" roleURI="http://slb.com/role/DerivativeInstrumentsAndHedgingActivitiesDetails3" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#DerivativeInstrumentsAndHedgingActivitiesDetails1" roleURI="http://slb.com/role/DerivativeInstrumentsAndHedgingActivitiesDetails1" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#DerivativeInstrumentsAndHedgingActivitiesTables" roleURI="http://slb.com/role/DerivativeInstrumentsAndHedgingActivitiesTables" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#IncomeTaxesTables" roleURI="http://slb.com/role/IncomeTaxesTables" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#IncomeTaxesDetails" roleURI="http://slb.com/role/IncomeTaxesDetails" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#IncomeTaxesDetails1" roleURI="http://slb.com/role/IncomeTaxesDetails1" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#IncomeTaxesDetails2" roleURI="http://slb.com/role/IncomeTaxesDetails2" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#IncomeTaxesDetails3" roleURI="http://slb.com/role/IncomeTaxesDetails3" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#SegmentInformationTables" roleURI="http://slb.com/role/SegmentInformationTables" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#SegmentInformationDetails" roleURI="http://slb.com/role/SegmentInformationDetails" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#FixedAssetsTables" roleURI="http://slb.com/role/FixedAssetsTables" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#IntangibleAssetsDetails1" roleURI="http://slb.com/role/IntangibleAssetsDetails1" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#DerivativeInstrumentsAndHedgingActivitiesDetails2" roleURI="http://slb.com/role/DerivativeInstrumentsAndHedgingActivitiesDetails2" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#IncomeTaxesDetails4" roleURI="http://slb.com/role/IncomeTaxesDetails4" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#SegmentInformationDetails1" roleURI="http://slb.com/role/SegmentInformationDetails1" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#DocumentAndEntityInformation" roleURI="http://slb.com/role/DocumentAndEntityInformation" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#StatementOfIncome" roleURI="http://slb.com/role/StatementOfIncome" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#BalanceSheet" roleURI="http://slb.com/role/BalanceSheet" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#BalanceSheetParenthetical" roleURI="http://slb.com/role/BalanceSheetParenthetical" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#StatementOfCashFlows" roleURI="http://slb.com/role/StatementOfCashFlows" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#StatementOfEquity" roleURI="http://slb.com/role/StatementOfEquity" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#StatementOfEquityParenthetical" roleURI="http://slb.com/role/StatementOfEquityParenthetical" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#Acquisitions" roleURI="http://slb.com/role/Acquisitions" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#Inventory" roleURI="http://slb.com/role/Inventory" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#FixedAssets" roleURI="http://slb.com/role/FixedAssets" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#MulticlientSeismicData" roleURI="http://slb.com/role/MulticlientSeismicData" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#Goodwill" roleURI="http://slb.com/role/Goodwill" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#IntangibleAssets" roleURI="http://slb.com/role/IntangibleAssets" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#DerivativeInstrumentsAndHedgingActivities" roleURI="http://slb.com/role/DerivativeInstrumentsAndHedgingActivities" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#Contingencies" roleURI="http://slb.com/role/Contingencies" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#SegmentInformation" roleURI="http://slb.com/role/SegmentInformation" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#InventoryTables" roleURI="http://slb.com/role/InventoryTables" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#InventoryDetails" roleURI="http://slb.com/role/InventoryDetails" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#ChargesAndCreditDetails" roleURI="http://slb.com/role/ChargesAndCreditDetails" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#LongTermDebtAndDebtFacilityAgreementsDetails" roleURI="http://slb.com/role/LongTermDebtAndDebtFacilityAgreementsDetails" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#LongTermDebtAndDebtFacilityAgreementsDetails1" roleURI="http://slb.com/role/LongTermDebtAndDebtFacilityAgreementsDetails1" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#LongTermDebtAndDebtFacilityAgreementsTables" roleURI="http://slb.com/role/LongTermDebtAndDebtFacilityAgreementsTables" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#BasisOfPresentation" roleURI="http://slb.com/role/BasisOfPresentation" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#IncomeTax" roleURI="http://slb.com/role/IncomeTax" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#EarningsPerShare" roleURI="http://slb.com/role/EarningsPerShare" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#LongTermDebt" roleURI="http://slb.com/role/LongTermDebt" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#PensionAndOtherPostretirementBenefits" roleURI="http://slb.com/role/PensionAndOtherPostretirementBenefits" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#EarningsPerShareDetails" roleURI="http://slb.com/role/EarningsPerShareDetails" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#EarningsPerShareTables" roleURI="http://slb.com/role/EarningsPerShareTables" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#PensionAndOtherPostretirementBenefitsDetails" roleURI="http://slb.com/role/PensionAndOtherPostretirementBenefitsDetails" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#PensionAndOtherPostretirementBenefitsTable" roleURI="http://slb.com/role/PensionAndOtherPostretirementBenefitsTable" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#PensionAndOtherPostretirementBenefitsDetails2" roleURI="http://slb.com/role/PensionAndOtherPostretirementBenefitsDetails2" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#PensionAndOtherPostretirementBenefitsDetails1" roleURI="http://slb.com/role/PensionAndOtherPostretirementBenefitsDetails1" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#SubsequentEventDetails" roleURI="http://slb.com/role/SubsequentEventDetails" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#SubsequentEvent" roleURI="http://slb.com/role/SubsequentEvent" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#Charges" roleURI="http://slb.com/role/Charges" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#ChargesTables" roleURI="http://slb.com/role/ChargesTables" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#AcquisitionsDetails1" roleURI="http://slb.com/role/AcquisitionsDetails1" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#FixedAssetsDetails1" roleURI="http://slb.com/role/FixedAssetsDetails1" />
  <roleRef xlink:type="simple" xlink:href="slb-20110331.xsd#EarningsPerShareDetails1" roleURI="http://slb.com/role/EarningsPerShareDetails1" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/FixedAssetsDetails" xlink:title="0606 - Disclosure - Fixed Assets (Details)">
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="us-gaap_PropertyPlantAndEquipmentNet" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_PropertyPlantAndEquipmentNet" xlink:to="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" order="20" use="optional" weight="-1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="us-gaap_PropertyPlantAndEquipmentGross" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_PropertyPlantAndEquipmentNet" xlink:to="us-gaap_PropertyPlantAndEquipmentGross" order="10" use="optional" weight="1" priority="1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/MulticlientSeismicDataTables" xlink:title="0507 - Disclosure - Multiclient Seismic Data (Tables)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/MulticlientSeismicDataDetails" xlink:title="0607 - Disclosure - Multiclient Seismic Data (Details)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/GoodwillTables" xlink:title="0508 - Disclosure - Goodwill (Tables)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/GoodwillDetails" xlink:title="0608 - Disclosure - Goodwill (Details)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/AcquisitionsDetails" xlink:title="0604 - Disclosure - Acquisitions (Details)">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/IntangibleAssetsDetails" xlink:title="0609 - Disclosure - Intangible Assets (Details)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/IntangibleAssetsTables" xlink:title="0509 - Disclosure - Intangible Assets (Tables)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/DerivativeInstrumentsAndHedgingActivitiesDetails" xlink:title="0610 - Disclosure - Derivative Instruments and Hedging Activities (Details)">
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAsset" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_DerivativeAssetNotDesignatedAsHedgingInstrumentFairValue" xlink:label="us-gaap_DerivativeAssetNotDesignatedAsHedgingInstrumentFairValue" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DerivativeFairValueOfDerivativeAsset" xlink:to="us-gaap_DerivativeAssetNotDesignatedAsHedgingInstrumentFairValue" order="20" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_DerivativeAssetDesignatedAsHedgingInstrumentFairValue" xlink:label="us-gaap_DerivativeAssetDesignatedAsHedgingInstrumentFairValue" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DerivativeFairValueOfDerivativeAsset" xlink:to="us-gaap_DerivativeAssetDesignatedAsHedgingInstrumentFairValue" order="10" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:label="us-gaap_DerivativeFairValueOfDerivativeLiability" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_DerivativeLiabilityNotDesignatedAsHedgingInstrumentFairValue" xlink:label="us-gaap_DerivativeLiabilityNotDesignatedAsHedgingInstrumentFairValue" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:to="us-gaap_DerivativeLiabilityNotDesignatedAsHedgingInstrumentFairValue" order="20" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_DerivativeLiabilityDesignatedAsHedgingInstrumentFairValue" xlink:label="us-gaap_DerivativeLiabilityDesignatedAsHedgingInstrumentFairValue" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:to="us-gaap_DerivativeLiabilityDesignatedAsHedgingInstrumentFairValue" order="10" use="optional" weight="1" priority="1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/DerivativeInstrumentsAndHedgingActivitiesDetails1" xlink:title="06101 - Disclosure - Derivative Instruments and Hedging Activities (Details 1)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/DerivativeInstrumentsAndHedgingActivitiesDetails3" xlink:title="06103 - Disclosure - Derivative Instruments and Hedging Activities (Details 3)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/DerivativeInstrumentsAndHedgingActivitiesTables" xlink:title="0510 - Disclosure - Derivative Instruments and Hedging Activities (Tables)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/IncomeTaxesTables" xlink:title="0512 - Disclosure - Income Tax (Tables)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/IncomeTaxesDetails" xlink:title="0612 - Disclosure - Income Tax (Details)">
    <loc xlink:type="locator" xlink:href="slb-20110331.xsd#slb_IncomeLossFromContinuingOperationsBeforeIncomeTaxesAndMinorityInterest" xlink:label="slb_IncomeLossFromContinuingOperationsBeforeIncomeTaxesAndMinorityInterest" />
    <loc xlink:type="locator" xlink:href="slb-20110331.xsd#slb_IncomeLossFromContinuingOperationsBeforeIncomeTaxesNonUnitedStates" xlink:label="slb_IncomeLossFromContinuingOperationsBeforeIncomeTaxesNonUnitedStates" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="slb_IncomeLossFromContinuingOperationsBeforeIncomeTaxesAndMinorityInterest" xlink:to="slb_IncomeLossFromContinuingOperationsBeforeIncomeTaxesNonUnitedStates" order="20" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="slb-20110331.xsd#slb_IncomeLossFromContinuingOperationsBeforeIncomeTaxesUnitedStates" xlink:label="slb_IncomeLossFromContinuingOperationsBeforeIncomeTaxesUnitedStates" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="slb_IncomeLossFromContinuingOperationsBeforeIncomeTaxesAndMinorityInterest" xlink:to="slb_IncomeLossFromContinuingOperationsBeforeIncomeTaxesUnitedStates" order="10" use="optional" weight="1" priority="1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/IncomeTaxesDetails1" xlink:title="06121 - Disclosure - Income Tax (Details 1)">
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="us-gaap_DeferredTaxAssetsNet" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_DeferredTaxAssetsOther" xlink:label="us-gaap_DeferredTaxAssetsOther" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DeferredTaxAssetsNet" xlink:to="us-gaap_DeferredTaxAssetsOther" order="20" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="slb-20110331.xsd#slb_DeferredTaxAssetsIntangibleAssets" xlink:label="slb_DeferredTaxAssetsIntangibleAssets" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DeferredTaxAssetsNet" xlink:to="slb_DeferredTaxAssetsIntangibleAssets" order="5" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DeferredTaxAssetsNet" xlink:to="us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits" order="1.25" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_DeferredTaxAssetsInvestmentInSubsidiaries" xlink:label="us-gaap_DeferredTaxAssetsInvestmentInSubsidiaries" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_DeferredTaxAssetsNet" xlink:to="us-gaap_DeferredTaxAssetsInvestmentInSubsidiaries" order="12.5" use="optional" weight="1" priority="1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/IncomeTaxesDetails2" xlink:title="06122 - Disclosure - Income Tax (Details 2)">
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="us-gaap_IncomeTaxExpenseBenefit" />
    <loc xlink:type="locator" xlink:href="slb-20110331.xsd#slb_TotalOfComponentsOfDeferredIncomeTaxes" xlink:label="slb_TotalOfComponentsOfDeferredIncomeTaxes" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeTaxExpenseBenefit" xlink:to="slb_TotalOfComponentsOfDeferredIncomeTaxes" order="20" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount" xlink:label="us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="slb_TotalOfComponentsOfDeferredIncomeTaxes" xlink:to="us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount" order="20" use="optional" weight="-1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_DeferredForeignIncomeTaxExpenseBenefit" xlink:label="us-gaap_DeferredForeignIncomeTaxExpenseBenefit" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="slb_TotalOfComponentsOfDeferredIncomeTaxes" xlink:to="us-gaap_DeferredForeignIncomeTaxExpenseBenefit" order="10" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit" xlink:label="us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="slb_TotalOfComponentsOfDeferredIncomeTaxes" xlink:to="us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit" order="5" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit" xlink:label="us-gaap_DeferredFederalIncomeTaxExpenseBenefit" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="slb_TotalOfComponentsOfDeferredIncomeTaxes" xlink:to="us-gaap_DeferredFederalIncomeTaxExpenseBenefit" order="2.5" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeTaxExpenseBenefit" xlink:to="us-gaap_CurrentIncomeTaxExpenseBenefit" order="10" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_CurrentForeignTaxExpenseBenefit" xlink:label="us-gaap_CurrentForeignTaxExpenseBenefit" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:to="us-gaap_CurrentForeignTaxExpenseBenefit" order="20" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:label="us-gaap_CurrentStateAndLocalTaxExpenseBenefit" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:to="us-gaap_CurrentStateAndLocalTaxExpenseBenefit" order="10" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_CurrentFederalTaxExpenseBenefit" xlink:label="us-gaap_CurrentFederalTaxExpenseBenefit" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:to="us-gaap_CurrentFederalTaxExpenseBenefit" order="5" use="optional" weight="1" priority="1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/IncomeTaxesDetails3" xlink:title="06123 - Disclosure - Income Tax (Details 3)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/SegmentInformationTables" xlink:title="0514 - Disclosure - Segment Information (Tables)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/SegmentInformationDetails" xlink:title="0614 - Disclosure - Segment Information (Details)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/FixedAssetsTables" xlink:title="0506 - Disclosure - Fixed Assets (Tables)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/IntangibleAssetsDetails1" xlink:title="06091 - Disclosure - Intangible Assets (Details 1)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/DerivativeInstrumentsAndHedgingActivitiesDetails2" xlink:title="06102 - Disclosure - Derivative Instruments and Hedging Activities (Details 2)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/IncomeTaxesDetails4" xlink:title="06124 - Disclosure - Income Tax (Details 4)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/SegmentInformationDetails1" xlink:title="06141 - Disclosure - Segment Information (Details 1)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/DocumentAndEntityInformation" xlink:title="00 - Document - Document and Entity Information" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/StatementOfIncome" xlink:title="0110 - Statement - CONSOLIDATED STATEMENT OF INCOME (Unaudited)">
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_ProfitLoss" xlink:label="us-gaap_ProfitLoss" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_ProfitLoss" order="100" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" order="200" use="optional" weight="-1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_ProfitLoss" xlink:to="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" order="6.25" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_MergerAndAcquisitionCosts" xlink:label="loc_MergerAndAcquisitionCosts" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:to="loc_MergerAndAcquisitionCosts" order="0.078125" use="optional" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_Revenues" xlink:label="us-gaap_Revenues" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:to="us-gaap_Revenues" order="0.15625" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="slb-20110331.xsd#slb_InterestIncomeAndOther" xlink:label="slb_InterestIncomeAndOther" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:to="slb_InterestIncomeAndOther" order="0.3125" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="us-gaap_ResearchAndDevelopmentExpense" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:to="us-gaap_ResearchAndDevelopmentExpense" order="1.25" use="optional" weight="-1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="us-gaap_GeneralAndAdministrativeExpense" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:to="us-gaap_GeneralAndAdministrativeExpense" order="5" use="optional" weight="-1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_InterestExpense" xlink:label="us-gaap_InterestExpense" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:to="us-gaap_InterestExpense" order="20" use="optional" weight="-1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="us-gaap_IncomeTaxExpenseBenefit" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_ProfitLoss" xlink:to="us-gaap_IncomeTaxExpenseBenefit" order="9.375" use="optional" weight="-1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold" xlink:label="loc_CostOfGoodsAndServicesSold" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:to="loc_CostOfGoodsAndServicesSold" order="0.390625" use="optional" weight="-1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/BalanceSheet" xlink:title="0120 - Statement - CONSOLIDATED BALANCE SHEET">
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_Liabilities" xlink:label="us-gaap_Liabilities" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_Liabilities" order="100" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="us-gaap_LiabilitiesCurrent" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_LiabilitiesCurrent" order="100" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent" order="100" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_AccruedIncomeTaxesCurrent" xlink:label="us-gaap_AccruedIncomeTaxesCurrent" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_AccruedIncomeTaxesCurrent" order="200" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_DividendsPayableCurrent" xlink:label="us-gaap_DividendsPayableCurrent" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_DividendsPayableCurrent" order="300" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="us-gaap_LongTermDebtCurrent" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_LongTermDebtCurrent" order="400" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:label="us-gaap_ShortTermBorrowings" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_ShortTermBorrowings" order="500" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_OtherLongTermDebtNoncurrent" xlink:label="us-gaap_OtherLongTermDebtNoncurrent" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_OtherLongTermDebtNoncurrent" order="200" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" order="300" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_DeferredTaxLiabilitiesNoncurrent" xlink:label="us-gaap_DeferredTaxLiabilitiesNoncurrent" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_DeferredTaxLiabilitiesNoncurrent" order="400" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="us-gaap_OtherLiabilitiesNoncurrent" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_OtherLiabilitiesNoncurrent" order="500" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" order="200" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="us-gaap_StockholdersEquity" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:to="us-gaap_StockholdersEquity" order="100" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_CommonStockValue" xlink:label="us-gaap_CommonStockValue" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_CommonStockValue" order="100" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_TreasuryStockValue" xlink:label="us-gaap_TreasuryStockValue" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_TreasuryStockValue" order="200" use="optional" weight="-1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_RetainedEarningsAccumulatedDeficit" order="300" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" order="400" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_MinorityInterest" xlink:label="us-gaap_MinorityInterest" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:to="us-gaap_MinorityInterest" order="200" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_Assets" xlink:label="us-gaap_Assets" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="us-gaap_AssetsCurrent" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_AssetsCurrent" order="100" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_Cash" xlink:label="us-gaap_Cash" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_Cash" order="100" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_ShortTermInvestments" xlink:label="us-gaap_ShortTermInvestments" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_ShortTermInvestments" order="200" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_ReceivablesNetCurrent" xlink:label="us-gaap_ReceivablesNetCurrent" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_ReceivablesNetCurrent" order="300" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_InventoryNet" xlink:label="us-gaap_InventoryNet" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_InventoryNet" order="400" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_DeferredTaxAssetsNetCurrent" xlink:label="us-gaap_DeferredTaxAssetsNetCurrent" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_DeferredTaxAssetsNetCurrent" order="500" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="us-gaap_OtherAssetsCurrent" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_OtherAssetsCurrent" order="600" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_HeldToMaturitySecuritiesNoncurrent" xlink:label="us-gaap_HeldToMaturitySecuritiesNoncurrent" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_HeldToMaturitySecuritiesNoncurrent" order="200" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures" xlink:label="us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures" order="300" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="us-gaap_PropertyPlantAndEquipmentNet" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_PropertyPlantAndEquipmentNet" order="400" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="slb-20110331.xsd#slb_MulticlientSeismicData" xlink:label="slb_MulticlientSeismicData" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="slb_MulticlientSeismicData" order="500" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_Goodwill" xlink:label="us-gaap_Goodwill" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_Goodwill" order="600" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_IntangibleAssetsNetExcludingGoodwill" order="700" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="us-gaap_OtherAssetsNoncurrent" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_OtherAssetsNoncurrent" order="900" use="optional" weight="1" priority="1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/BalanceSheetParenthetical" xlink:title="0121 - Statement - CONSOLIDATED BALANCE SHEET (Parenthetical)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/StatementOfCashFlows" xlink:title="0130 - Statement - CONSOLIDATED STATEMENT OF CASH FLOWS (Unaudited)">
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities" order="100" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_ProfitLoss" xlink:label="us-gaap_ProfitLoss" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_ProfitLoss" order="100" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="us-gaap_DepreciationDepletionAndAmortization" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_DepreciationDepletionAndAmortization" order="200" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions" xlink:label="us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions" order="500" use="optional" weight="-1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_DeferredIncomeTaxExpenseBenefit" order="600" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="us-gaap_ShareBasedCompensation" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_ShareBasedCompensation" order="700" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_IncreaseDecreaseInPensionAndPostretirementObligations" xlink:label="us-gaap_IncreaseDecreaseInPensionAndPostretirementObligations" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_IncreaseDecreaseInPensionAndPostretirementObligations" order="800" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitContributions" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitContributions" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_PensionAndOtherPostretirementBenefitContributions" order="900" use="optional" weight="-1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_IncreaseDecreaseInReceivables" xlink:label="us-gaap_IncreaseDecreaseInReceivables" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_IncreaseDecreaseInReceivables" order="1200" use="optional" weight="-1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="us-gaap_IncreaseDecreaseInInventories" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_IncreaseDecreaseInInventories" order="1300" use="optional" weight="-1" priority="1" />
    <loc xlink:type="locator" xlink:href="slb-20110331.xsd#slb_IncreaseDecreaseOtherCurrentAssets" xlink:label="slb_IncreaseDecreaseOtherCurrentAssets" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="slb_IncreaseDecreaseOtherCurrentAssets" order="1400" use="optional" weight="-1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" order="1500" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable" xlink:label="us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable" order="1600" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" order="1700" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet" order="1800" use="optional" weight="-1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivities" order="200" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:to="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" order="100" use="optional" weight="-1" priority="1" />
    <loc xlink:type="locator" xlink:href="slb-20110331.xsd#slb_PaymentsForProceedsFromCapitalizedCostsSupportEquipmentAndFacilities" xlink:label="slb_PaymentsForProceedsFromCapitalizedCostsSupportEquipmentAndFacilities" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:to="slb_PaymentsForProceedsFromCapitalizedCostsSupportEquipmentAndFacilities" order="200" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_OtherPaymentsToAcquireBusinesses" xlink:label="us-gaap_OtherPaymentsToAcquireBusinesses" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:to="us-gaap_OtherPaymentsToAcquireBusinesses" order="400" use="optional" weight="-1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_PaymentsForProceedsFromInvestments" xlink:label="us-gaap_PaymentsForProceedsFromInvestments" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:to="us-gaap_PaymentsForProceedsFromInvestments" order="500" use="optional" weight="-1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="us-gaap_PaymentsForProceedsFromOtherInvestingActivities" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:to="us-gaap_PaymentsForProceedsFromOtherInvestingActivities" order="600" use="optional" weight="-1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities" order="300" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_PaymentsOfDividends" xlink:label="us-gaap_PaymentsOfDividends" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_PaymentsOfDividends" order="100" use="optional" weight="-1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_ProceedsFromStockPlans" xlink:label="us-gaap_ProceedsFromStockPlans" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_ProceedsFromStockPlans" order="200" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised" xlink:label="us-gaap_ProceedsFromStockOptionsExercised" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_ProceedsFromStockOptionsExercised" order="300" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_PaymentsForRepurchaseOfEquity" xlink:label="us-gaap_PaymentsForRepurchaseOfEquity" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_PaymentsForRepurchaseOfEquity" order="500" use="optional" weight="-1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_ProceedsFromIssuanceOfLongTermDebt" order="600" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="us-gaap_RepaymentsOfLongTermDebt" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_RepaymentsOfLongTermDebt" order="700" use="optional" weight="-1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfShortTermDebt" xlink:label="us-gaap_ProceedsFromRepaymentsOfShortTermDebt" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_ProceedsFromRepaymentsOfShortTermDebt" order="800" use="optional" weight="1" priority="1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/StatementOfEquity" xlink:title="0140 - Statement - CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Unaudited)">
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_ProfitLoss" xlink:label="us-gaap_ProfitLoss" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:to="us-gaap_ProfitLoss" order="100" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease" xlink:label="us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:to="us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease" order="200" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease" xlink:label="us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:to="us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease" order="300" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease" xlink:label="us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:to="us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease" order="400" use="optional" weight="1" priority="1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/StatementOfEquityParenthetical" xlink:title="0141 - Statement - CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Parenthetical)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/Acquisitions" xlink:title="0204 - Disclosure - Acquisitions" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/Inventory" xlink:title="0205 - Disclosure - Inventory" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/FixedAssets" xlink:title="0206 - Disclosure - Fixed Assets" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/MulticlientSeismicData" xlink:title="0207 - Disclosure - Multiclient Seismic Data" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/Goodwill" xlink:title="0208 - Disclosure - Goodwill" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/IntangibleAssets" xlink:title="0209 - Disclosure - Intangible Assets" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/DerivativeInstrumentsAndHedgingActivities" xlink:title="0210 - Disclosure - Derivative Instruments and Hedging Activities" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/Contingencies" xlink:title="0213 - Disclosure - Contingencies" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/SegmentInformation" xlink:title="0214 - Disclosure - Segment Information" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/InventoryTables" xlink:title="0505 - Disclosure - Inventory (Tables)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/InventoryDetails" xlink:title="0605 - Disclosure - Inventory (Details)">
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_InventoryNet" xlink:label="us-gaap_InventoryNet" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_InventoryFinishedGoods" xlink:label="us-gaap_InventoryFinishedGoods" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_InventoryNet" xlink:to="us-gaap_InventoryFinishedGoods" order="20" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_InventoryWorkInProcess" xlink:label="us-gaap_InventoryWorkInProcess" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_InventoryNet" xlink:to="us-gaap_InventoryWorkInProcess" order="10" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/elts/us-gaap-2009-01-31.xsd#us-gaap_InventoryRawMaterialsAndSupplies" xlink:label="us-gaap_InventoryRawMaterialsAndSupplies" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_InventoryNet" xlink:to="us-gaap_InventoryRawMaterialsAndSupplies" order="5" use="optional" weight="1" priority="1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/ChargesAndCreditDetails" xlink:title="0602 - Disclosure - Charges (Details)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/LongTermDebtAndDebtFacilityAgreementsDetails" xlink:title="0611 - Disclosure - Long-term Debt (Details)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/LongTermDebtAndDebtFacilityAgreementsDetails1" xlink:title="06111 - Disclosure -  Long-term Debt (Details 1)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/LongTermDebtAndDebtFacilityAgreementsTables" xlink:title="0511 - Disclosure - Long-term Debt (Tables)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/BasisOfPresentation" xlink:title="0201 - Disclosure - Basis of Presentation" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/IncomeTax" xlink:title="0212 - Disclosure - Income Tax" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/EarningsPerShare" xlink:title="0203 - Disclosure - Earnings Per Share" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/LongTermDebt" xlink:title="0211 - Disclosure - Long-term Debt" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/PensionAndOtherPostretirementBenefits" xlink:title="0215 - Disclosure - Pension and Other Postretirement Benefits" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/EarningsPerShareDetails" xlink:title="0603 - Disclosure - Earnings Per Share (Details)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/EarningsPerShareTables" xlink:title="0503 - Disclosure - Earnings Per Share (Tables)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/PensionAndOtherPostretirementBenefitsDetails" xlink:title="0615 - Disclosure - Pension and Other Postretirement Benefits (Details)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/PensionAndOtherPostretirementBenefitsTable" xlink:title="0515 - Disclosure - Pension and Other Postretirement Benefits (Table)">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/PensionAndOtherPostretirementBenefitsDetails2" xlink:title="06152 - Disclosure - Pension and Other Postretirement Benefits (Details 2)">
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/PensionAndOtherPostretirementBenefitsDetails1" xlink:title="06151 - Disclosure - Pension and Other Postretirement Benefits (Details 1)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/SubsequentEventDetails" xlink:title="0616 - Disclosure - Subsequent Event (Details)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/SubsequentEvent" xlink:title="0216 - Disclosure - Subsequent Events" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/Charges" xlink:title="0202 - Disclosure - Charges" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/ChargesTables" xlink:title="0502 - Disclosure - Charges (Tables)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/AcquisitionsDetails1" xlink:title="06041 - Disclosure - Acquisitions (Details 1)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/FixedAssetsDetails1" xlink:title="06061 - Disclosure - Fixed Assets (Details 1)" />
  <calculationLink xlink:type="extended" xlink:role="http://slb.com/role/EarningsPerShareDetails1" xlink:title="06031 - Disclosure - Earnings Per Share (Details 1)" />
</linkbase>
</XBRL>
