E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/46.3
E21B 43/12 (2006.01) E21B 33/035 (2006.01) E21B 34/16 (2006.01) F15B 11/16 (2006.01)
Patent
CA 1118342
ABSTRACT OF THE DISCLOSURE Method and apparatus for hydraulically control- ling subsea well equipment, such as valve operators, con- nectors, and other hydraulically actuated devices, with a significantly smaller number of hydraulic pressure source lines from the surface to the subsea location of said well equipment and for providing return signals to indicate the state of operation of said well equipment using the same hydraulic lines. The apparatus includes a plurality of hydraulic AND-gate logic elements and a plurality of hydraulic valves mounted near the well equipment. A pair of hydraulic lines between the hydraulic valves and a surface vessel or other surface facility provides control for the various valve operators, connectors and other hydraulically actuated devices, while a third hydraulic line provides power to operate the various devices. The same pair of control lines can be used to transmit signal information from the various devices on the sea floor to the surface vessel to indicate the operating status of these devices.
332721
Horn Charles E.
Kluttz Marvin H.
Milberger Lionel J.
Fetherstonhaugh & Co.
Fmc Corporation
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