Motors: expansible chamber type – With signal – indicator or inspection means
Patent
1979-06-29
1983-10-04
Hershkovitz, Abraham
Motors: expansible chamber type
With signal, indicator or inspection means
91522, 91526, 91527, 13762411, F01B 2526
Patent
active
044071833
ABSTRACT:
Method and apparatus for hydraulically controlling subsea well equipment, such as valve operators, connectors, 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.
REFERENCES:
patent: 3783899 (1974-01-01), Fowler
patent: 3854380 (1974-12-01), Casey
patent: 3926217 (1975-12-01), Ohishi
patent: 3952763 (1976-04-01), Baugh
patent: 3993100 (1976-11-01), Pollard
patent: 4185541 (1980-01-01), Milberger
Horn Charles E.
Kluttz Marvin H.
Milberger Lionel J.
FMC Corporation
Guernsey L. B.
Hershkovitz Abraham
Ritt, Jr. W. W.
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