초록 ▼

There are disclosed two embodiments of an apparatus for releasably latching the lower end of a tubing string within the bore of an upstanding well conduit by means of latching parts adapted to be received in latching position beneath a shoulder in the bore of the well conduit. The latching parts are

There are disclosed two embodiments of an apparatus for releasably latching the lower end of a tubing string within the bore of an upstanding well conduit by means of latching parts adapted to be received in latching position beneath a shoulder in the bore of the well conduit. The latching parts are locked in latching position by locking means which is engageable and releasable in response to manipulation of the well string. The latching parts are moved into unlatching position, upon release of the locking means, without necessity of sliding contact between the latching parts and the shoulder. There are also disclosed two embodiments of a seal ring clamped within a groove about a stinger portion of the apparatus for sealably engaging the bore of the well conduit.

대표청구항 ▼

Apparatus for latching the end of one member to the end of another member which has a latching shoulder thereon facing away from said end, comprising a body connectible to the end of the one member and adapted to be moved into telescoping relation with respect to the end of the other member, latchin

Apparatus for latching the end of one member to the end of another member which has a latching shoulder thereon facing away from said end, comprising a body connectible to the end of the one member and adapted to be moved into telescoping relation with respect to the end of the other member, latching means supported by the body, including a carrier and latches supported by the carrier for movement from unlatched to latched position with respect to the latching shoulder, when said body is so telescopically related with respect to the end of said other member, said body being movable in one vertical direction with respect to said latching means into a position for holding said latches in latched position, said body and latching means having means thereon for preventing movement of said body in the opposite vertical direction and out of holding position, and thus locking the body in latch holding position, and said locking means being releasable in response to rotation of the body to permit the body to be moved in said opposite vertical direction and out of latch holding position, whereby the latches are free to move into unlatched position to permit the apparatus to be moved with said one member out of telescoping relation with said other member.