E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 17/06 (2006.01) E21B 23/04 (2006.01) E21B 43/10 (2006.01) F16L 37/086 (2006.01) F16L 37/62 (2006.01)
Patent
CA 2067227
2067227 9105935 PCTABS00005 A hydraulic setting and release tool (10) has a shear out setting assembly (12) attached to a string coupling member (14). Upon reaching a predetermined hydraulic pressure, a piston (20) of the tool (40) shears restraining shear pins (22) and moves in a body of the tool to release dogs (15) that engage the coupling member (14). When the dogs (15) release, springs (16) retract the dogs (15) from engagement in sockets (34) of the coupling member (14) and the shear out setting assembly (12) separates from the coupling member (14). When used in running in a liner, the coupling member is a running head (14) that rotates the liner during running in and cementing. When used as a drill string release tool, the coupling member is a release sub (44), the tool (10) being placed serially with other string components. If the drill string gets stuck, it is separated by merely increasing the hydraulic pressure sufficiently to shear the pins (22) and allow the piston (20) to move and the dogs (15) to retract to separate the release sub from the shear out assembly (12).
Ehlinger Jeffry C.
Mims Michael G.
Mueller Mark D.
Ehlinger Jeffry C.
Fetherstonhaugh & Co.
Mims Michael G.
Mueller Mark D.
Union Oil Company Of California
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