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    <schemaVersion>X0707</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001336762</cik>
        <entityName>CALFRAC WELL SERVICES LTD</entityName>
        <issuerAddress>
            <street1>411 - 8th Avenue, S.W.</street1>
            <city>Calgary</city>
            <stateOrCountry>A0</stateOrCountry>
            <stateOrCountryDescription>ALBERTA, CANADA</stateOrCountryDescription>
            <zipCode>T2P 1E3</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>(403) 234-6672</issuerPhoneNumber>
        <jurisdictionOfInc>ALBERTA, CANADA</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Corporation</entityType>
        <yearOfInc>
            <overFiveYears>true</overFiveYears>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Fernando</firstName>
                <lastName>Aguilar</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>411 - 8th Avenue, S.W.</street1>
                <city>Calgary</city>
                <stateOrCountry>A0</stateOrCountry>
                <stateOrCountryDescription>ALBERTA, CANADA</stateOrCountryDescription>
                <zipCode>T2P 1E3</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>President, Chief Executive Officer and Director</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Michael</firstName>
                <middleName>D.</middleName>
                <lastName>Olinek</lastName>
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                <street1>411 - 8th Avenue, S.W.</street1>
                <city>Calgary</city>
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                <stateOrCountryDescription>ALBERTA, CANADA</stateOrCountryDescription>
                <zipCode>T2P 1E3</zipCode>
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            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Vice President, Finance and Interim Chief Financial Officer</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Lindsay</firstName>
                <middleName>R.</middleName>
                <lastName>Link</lastName>
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                <street1>411 - 8th Avenue, S.W.</street1>
                <city>Calgary</city>
                <stateOrCountry>A0</stateOrCountry>
                <stateOrCountryDescription>ALBERTA, CANADA</stateOrCountryDescription>
                <zipCode>T2P 1E3</zipCode>
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            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
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            <relationshipClarification>Chief Operating Officer</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>F.</firstName>
                <middleName>Bruce</middleName>
                <lastName>Payne</lastName>
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            <relatedPersonAddress>
                <street1>411 - 8th Avenue, S.W.</street1>
                <city>Calgary</city>
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                <zipCode>T2P 1E3</zipCode>
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            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Vice President, Global Operations</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Fred</firstName>
                <middleName>L.</middleName>
                <lastName>Toney</lastName>
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                <street1>411 - 8th Avenue, S.W.</street1>
                <city>Calgary</city>
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                <stateOrCountryDescription>ALBERTA, CANADA</stateOrCountryDescription>
                <zipCode>T2P 1E3</zipCode>
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            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>President, United States Division</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Gerardo</firstName>
                <middleName>D.</middleName>
                <lastName>Kuracz</lastName>
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                <street1>411 - 8th Avenue, S.W.</street1>
                <city>Calgary</city>
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                <stateOrCountryDescription>ALBERTA, CANADA</stateOrCountryDescription>
                <zipCode>T2P 1E3</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>President, Latin America Division</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Robert</firstName>
                <middleName>L.</middleName>
                <lastName>Sutherland</lastName>
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                <street1>411 - 8th Avenue, S.W.</street1>
                <city>Calgary</city>
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                <zipCode>T2P 1E3</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>President, Russian Division</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Tom</firstName>
                <middleName>J.</middleName>
                <lastName>Medvedic</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>411 - 8th Avenue, S.W.</street1>
                <city>Calgary</city>
                <stateOrCountry>A0</stateOrCountry>
                <stateOrCountryDescription>ALBERTA, CANADA</stateOrCountryDescription>
                <zipCode>T2P 1E3</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>President, Canadian Division</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Ronald</firstName>
                <middleName>P.</middleName>
                <lastName>Mathison</lastName>
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                <street1>411 - 8th Avenue, S.W.</street1>
                <city>Calgary</city>
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                <zipCode>T2P 1E3</zipCode>
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            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Chairman of the Board and Director</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Douglas</firstName>
                <middleName>R.</middleName>
                <lastName>Ramsay</lastName>
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                <street1>411 - 8th Avenue, S.W.</street1>
                <city>Calgary</city>
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                <zipCode>T2P 1E3</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Vice Chairman and Director</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Kevin</firstName>
                <middleName>R.</middleName>
                <lastName>Baker</lastName>
            </relatedPersonName>
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                <street1>411 - 8th Avenue, S.W.</street1>
                <city>Calgary</city>
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                <stateOrCountryDescription>ALBERTA, CANADA</stateOrCountryDescription>
                <zipCode>T2P 1E3</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
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        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>James</firstName>
                <middleName>S.</middleName>
                <lastName>Blair</lastName>
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            <relatedPersonAddress>
                <street1>411 - 8th Avenue, S.W.</street1>
                <city>Calgary</city>
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                <stateOrCountryDescription>ALBERTA, CANADA</stateOrCountryDescription>
                <zipCode>T2P 1E3</zipCode>
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            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
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        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Gregory</firstName>
                <middleName>S.</middleName>
                <lastName>Fletcher</lastName>
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                <street1>411 - 8th Avenue, S.W.</street1>
                <city>Calgary</city>
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                <stateOrCountryDescription>ALBERTA, CANADA</stateOrCountryDescription>
                <zipCode>T2P 1E3</zipCode>
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            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Lorne</firstName>
                <middleName>A.</middleName>
                <lastName>Gartner</lastName>
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                <lastName>Brown</lastName>
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            <relationshipClarification>Vice President, Technology</relationshipClarification>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Mark</firstName>
                <middleName>R.</middleName>
                <lastName>Ellingson</lastName>
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            <relationshipClarification>Vice President, Sales and Marketing, U.S. Division</relationshipClarification>
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        <relatedPersonInfo>
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                <firstName>Chris</firstName>
                <middleName>K</middleName>
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                <firstName>Roderick</firstName>
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            <relationshipClarification>Vice President, Health, Safety and Environment</relationshipClarification>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Chad</firstName>
                <middleName>J.</middleName>
                <lastName>Leier</lastName>
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            <relationshipClarification>Vice President, Sales and Marketing, Canadian Division</relationshipClarification>
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            <relatedPersonName>
                <firstName>Edward</firstName>
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            <relationshipClarification>Vice President, Human Resources</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>B.</firstName>
                <middleName>Mark</middleName>
                <lastName>Paslawski</lastName>
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            <relationshipClarification>Vice President, General Counsel and Corporate Secretary</relationshipClarification>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Gary</firstName>
                <middleName>J.</middleName>
                <lastName>Rokosh</lastName>
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            </relatedPersonAddress>
            <relatedPersonRelationshipList>
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            <relationshipClarification>Vice President, Business Development, Canadian Division</relationshipClarification>
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    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Oil and Gas</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>Decline to Disclose</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06b</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2016-12-06</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>394488</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>394488</totalOfferingAmount>
            <totalAmountSold>394488</totalAmountSold>
            <totalRemaining>0</totalRemaining>
            <clarificationOfResponse>All figures converted from Canadian dollars to US dollars at an exchange rate of CAD 1.32 to USD 1.00. Total amount sold
and number of Investors exclude sales by the Issuer pursuant to Regulation S.</clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>1</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>CALFRAC WELL SERVICES LTD</issuerName>
                <signatureName>/s/ B. Mark Paslawski</signatureName>
                <nameOfSigner>B. Mark Paslawski</nameOfSigner>
                <signatureTitle>Vice President, General Counsel and Corporate Secretary</signatureTitle>
                <signatureDate>2016-12-09</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
