Cooper Industries, Inc.

Cameron Iron Works Usa, Inc.

Brian Saunders

Jerry D Smith

A hanger (3) is suspended and sealed within a wellhead housing (5) by means of a landing ring which engages teeth (8) on the hanger, and a sealing device consisting of wedge rings (15 and 16) which seal respectively against the teeth (8) and the wall of the housing (5).

Hanger assembly

An improved wellhead annulus seal installation tool and preload retention apparatus is disclosed particularly adapted for metal-to-metal seals. The seal installation tool includes a telescoping mandrel with a torsion spring attached and a torque sleeve rotatably mounted thereon with a pair of antirotation pins for limiting the rotation of the torque sleeve, a resilient seal for sealing the lower portion of the tool inside the hanger and torque pins for transmitting the torque and axial movement of the tool to the preload retention apparatus. The preload retention apparatus includes an upper body with an annulus packoff seal which may be resilient or metal-to-metal and a driving ring threaded thereon. An expansible lock ring in carried on the driving ring with an expander ring thereabove which coacts with the seal installation tool to thereby lock the annulus packoff seal inside the wellhead.

Hydraulic/torsion packoff installation tool

A connector for joining ends of tubular members having external grooves near the ends including a plurality of latching elements having inner projections for engaging the external grooves in the tubular members and external surfaces, a first cam ring having internal surfaces for mating with the upper external surfaces of the latching elements, a second cam ring having internal surfaces for mating with the lower external surfaces of the latching elements, threaded studs extending through said cam rings with a nut engaging each threaded end for forcing the cam rings toward each other, at least one of the upper or lower external surfaces of the latching elements being tapered so that the movement of the cam rings moves the latching elements into locking engagement with the tubular member grooves and a snap ring for biasing the latching elements radially outward.

Collet type connector

An improved annular seal including a resilient seal ring, a first follower, a second follower being threadedly connected to the first follower, threads on the first follower for setting movement of the followers, a shear pin for releasably securing the second follower to the first follower, the first follower having a lower rim for engaging the resilient seal ring, the second follower having a lower extension for exerting a loading force on the resilient seal ring, the area of engagement of the first follower with the seal ring being substantially larger than the area of the second seal ring exerting the seal ring loading force. In one form the second follower includes a lower rim extending around the exterior of the first follower into engagement with the seal ring. In a modified form the first follower includes a plurality of openings through its lower rim and the second follower includes a plurality of pins extending through the openings to exert a force on the seal ring.

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Chipping Sodbury, United Kingdom

Brian Saunders