-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 QH73kfCEzp1YxFsjeMVRVthehhheJsL+UQFMuZoNEs6O2cWpnqjryjvLqe0bZGHF
 ePtGVOFgiqvDS3VOuvg29Q==

<SEC-DOCUMENT>0001209191-04-034724.txt : 20040706
<SEC-HEADER>0001209191-04-034724.hdr.sgml : 20040705
<ACCEPTANCE-DATETIME>20040706104019
ACCESSION NUMBER:		0001209191-04-034724
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040702
FILED AS OF DATE:		20040706

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PRIMEENERGY CORP
		CENTRAL INDEX KEY:			0000056868
		STANDARD INDUSTRIAL CLASSIFICATION:	CRUDE PETROLEUM & NATURAL GAS [1311]
		IRS NUMBER:				840637348
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		ONE LANDMARK SQ
		CITY:			STAMFORD
		STATE:			CT
		ZIP:			06901
		BUSINESS PHONE:		2033585700

	MAIL ADDRESS:	
		STREET 1:		ONE LANDMARK SQ
		CITY:			STAMFORD
		STATE:			CT
		ZIP:			06901

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	KRM PETROLEUM CORP
		DATE OF NAME CHANGE:	19900614

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MCJUNKIN CORP
		CENTRAL INDEX KEY:			0001016497
		STATE OF INCORPORATION:			WV
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-07406
		FILM NUMBER:		04901496

	BUSINESS ADDRESS:	
		STREET 1:		PO BOX 513
		CITY:			CHARLESTON
		STATE:			WV
		ZIP:			25322
		BUSINESS PHONE:		3043481804

	MAIL ADDRESS:	
		STREET 1:		PO BOX 513
		CITY:			CHARLESTON
		STATE:			WV
		ZIP:			25322
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>bod16553_bod1mc.xml
<DESCRIPTION>MAIN DOCUMENT DESCRIPTION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-07-02</periodOfReport>

    <issuer>
        <issuerCik>0000056868</issuerCik>
        <issuerName>PRIMEENERGY CORP</issuerName>
        <issuerTradingSymbol>PNRG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001016497</rptOwnerCik>
            <rptOwnerName>MCJUNKIN CORP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>835 HILLCREST DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CHARLESTON</rptOwnerCity>
            <rptOwnerState>WV</rptOwnerState>
            <rptOwnerZipCode>25311</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, $0.10 par</value>
            </securityTitle>
            <transactionDate>
                <value>2004-07-02</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>25000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>18.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>673521</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <ownerSignature>
        <signatureName>McJunkin Corporation By: /s/ Gaines Wehrle - Vice President</signatureName>
        <signatureDate>2004-07-06</signatureDate>
    </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
