초록 ▼

A well apparatus and method of running same, which apparatus includes a hanger body with a downwardly facing external shoulder adapted to land on a wellhead housing landing seat and having an external flow passage therearound for flow of fluids past the landing shoulder and around the exterior of th

A well apparatus and method of running same, which apparatus includes a hanger body with a downwardly facing external shoulder adapted to land on a wellhead housing landing seat and having an external flow passage therearound for flow of fluids past the landing shoulder and around the exterior of the hanger body; a packer assembly adapted to seal against the interior of the wellhead housing and against a seal surface on the hanger body with an actuating sleeve surrounding a mandrel, which sleeve is adapted to move to set the packing ring and includes means holding the sleeve against inadvertent setting and means holding the packer assembly in set position, together with a running tool which is releasably engaged to the hanger body and to the packer assembly so that on seating of the hanger body, the running tool may be released from the hanger body to move the packer assembly into sealing engagement with the hanger body and with the interior of the wellhead housing. The method includes the steps of securing the casing hanger and packer assembly on the running tool, lowering the running tool on a string to land the hanger on the landing seat, submitting the hanger in landed position, releasing the running tool from the hanger and picking up the running string and circulating to clean the upper portion of the casing hanger and packing assembly and interior of the well housing, lowering the running string to set the packer, closing the blowout preventer rams to pressure the annulus above the packer, test the effectiveness of the packer seal and recovering the running tool if the seal is satisfactory.

대표청구항 ▼

A well apparatus comprising a hanger body having a downwardly facing external shoulder adapted to land on a well housing landing seat, an external flow passage for the flow of fluids past the landing shoulder and around the exterior of the hanger body and a seal surface above said shoulder, a packer

A well apparatus comprising a hanger body having a downwardly facing external shoulder adapted to land on a well housing landing seat, an external flow passage for the flow of fluids past the landing shoulder and around the exterior of the hanger body and a seal surface above said shoulder, a packer assembly having a mandrel with a lower sealing means adapted to engage and seal against said seal surface on said hanger body, a packing ring, means supporting said packing ring on said mandrel, an actuating sleeve surrounding said mandrel and adapted to move said packing ring into sealing engagement between said mandrel and the interior of the well housing, means for releasably holding said sleeve from movement, and means for securing said mandrel in set position to the interior of said housing, a running tool having means for releasably engaging said hanger body and for releasably engaging said packer assembly whereby, as said tool is run into the well housing and said hanger seats on the housing landing seat, the packer assembly is moved into sealing engagement with said hanger body and with said housing and said tool may be recovered with said hanger body and packer assembly remaining the well housing, said running tool is disengaged from said hanger body prior to the movement to set said packer assembly, said running tool is disengaged from said packer assembly with setting movement of said running tool, and means on said running tool for re-engaging said packer assembly for the recovery of said packer assembly on said running tool in the event said packer assembly does not seal satisfactorily within said well housing.