Wells – Submerged well – Testing
Patent
1977-01-17
1980-11-18
Leppink, James A.
Wells
Submerged well
Testing
166319, 166363, 137236S, E21B 712
Patent
active
042340438
ABSTRACT:
A subsea test valve system for wells completed at the floor of the sea includes a safety valve and disconnect mechanism mounted in a blowout preventer at the bottom of the sea and having hydraulic fluid pressure operated means for opening the safety valve and controlling a latch in the disconnect mechanism. A tubing test string shut off valve is releasably latched in the disconnect mechanism and has a hydraulic fluid operated shut off valve and a valve for venting the test string to the riser pipe which extends from the blowout preventer to the vessel or platform at the surface of the sea. The subsea hydraulic pressure operated devices are supplied with pressure fluid from a subsea accumulator under the control of subsea pilot valves which are operated by small pressure differences, to accomplish rapid operation at great depth from a control console on the vessel or platform.
REFERENCES:
patent: 3064735 (1962-11-01), Bauer et al.
patent: 3411576 (1968-11-01), Taylor, Jr.
patent: 3496999 (1970-02-01), Rowley
patent: 3516492 (1970-06-01), Petersen
patent: 3675720 (1972-06-01), Sizer
patent: 3856037 (1974-12-01), Garrett et al.
patent: 3870101 (1975-03-01), Helmus
patent: 3921500 (1975-11-01), Silcox
patent: 3967647 (1976-07-01), Young
patent: 4116272 (1978-08-01), Barrington
Baker International Corporation
Favreau Richard E.
Leppink James A.
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