<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-04-02</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001069489</issuerCik>
        <issuerName>WESCORP ENERGY INC</issuerName>
        <issuerTradingSymbol>WSCE.OB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001464999</rptOwnerCik>
            <rptOwnerName>Abuelo Trust</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O J&amp;T BANK AND TRUST, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>LAURISTON HOUSE, LOWER COLLYMORE ROCK</rptOwnerStreet2>
            <rptOwnerCity>BRIDGETOWN</rptOwnerCity>
            <rptOwnerState>C8</rptOwnerState>
            <rptOwnerZipCode>BB11000</rptOwnerZipCode>
            <rptOwnerStateDescription>BARBADOS</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Common Stock, $0.0001 Par Value</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2010-04-02</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1236499</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F2"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $0.0001 Par Value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1236499</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>13601491</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Consists of shares of Common Stock to be issued by Wescorp Energy Inc. pursuant to Section 3.2(g) of that certain Share Purchase Agreement, dated January  14,
2004, by and between Wescorp Energy Inc. and Abuelo Trust (the &quot;Share Purchase Agreement&quot;). Pursuant to Sections 3.2(e)(iii) and 3.2(g) of the Share  Purchase
Agreement certain shares of Common Stock were to be issued on or before April 7, 2007 and each subsequent month Abuelo Trust is entitled to an  additional 10% of
the shares required to be issued to, but yet unissued to Abuelo Trust. As of the date of this filing no shares required to be issued pursuant to  Sections 3.2(e)(iii) and
3.2(g) of the Share Purchase Agreement have been issued to Abuelo Trust.</footnote>
        <footnote id="F2">The right of Abuelo Trust to receive shares of Common Stock pursuant to the Share Purchase Agreement does not expire.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Abuelo Trust; By: J&amp;T Bank and Trust, Inc., as Trustee; By: Lisa Cumberbatch and Deborah Simmons, Authorized Signatories Abuelo Trust</signatureName>
        <signatureDate>2010-04-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
