Wells – Above ground apparatus – With assembly or disassembly means
Patent
1977-11-21
1979-01-09
Novosad, Stephen J.
Wells
Above ground apparatus
With assembly or disassembly means
166242, 166313, 166341, 166360, E21B 1702, E21B 2300, E21B 33035
Patent
active
041333780
ABSTRACT:
A well system and method for completing petroleum oil and gas wells having special application to extreme environmental settings such as platform, sub sea, and floating vessel operations, and frozen regions such as the Arctic. The system effectively defines a downhole wellhead including weight supporting apparatus in which the tubing hanger is supported and a pack-off with the casing for minimizing the effects of structural damage at the surface end of the well system. The system includes a tubing hanger releasably lockable in a casing at a downhole location and having sealing means for sealing the annulus within the casing around the hanger, a ball valve package lock releasably lockable in the tubing hanger, tubing strings connected with the ball valve package lock and extending upwardly therefrom, including tubing valves, a safety joint connected with the tubing strings above the valves, tubing strings connected with the safety joint extending upwardly to a tubing head at the wellhead, control fluid conduits connected from the tubing head through the safety joint to the ball valve package lock and tubing hanger for manipulation of the system during various phases of operation, and a composite handling string for running and pulling the well system including either of a slip joint or a hydraulic stop and orienting tool.
REFERENCES:
patent: 2788073 (1957-04-01), Brown
patent: 2788074 (1957-04-01), Brown
patent: 3104708 (1963-09-01), Orr et al.
patent: 3347312 (1967-10-01), Meilon
patent: 3807497 (1974-04-01), Baugh
patent: 3861463 (1975-01-01), Crowe
Garland H. Mathews
Novosad Stephen J.
Otis Engineering Corporation
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