Remotely operable safety valve

Details Remotely operable safety valve Remotely operable safety valve

1983-04-20

1986-03-18

Jones, Larry

Valves and valve actuation

Fluid actuated or retarded

Fluid and non-fluid actuators

251 58, 251 62, 251 77, 166319, F16K 31143

Patent

active

045763585

ABSTRACT:
An improved remotely operable safety valve which is adapted for use between the swivel and the kelly is disclosed. An annular hydraulic piston moves the valve to the open and closed position whether or not the drill string is rotating, and in the event of hydraulic failure, the valve may be operated manually. Centering spring means are provided to reduce wear on the operable elements when the valve is in the open position.

REFERENCES:
patent: 2340999 (1944-02-01), Trott
patent: 2352140 (1944-06-01), Trott
patent: 2390882 (1945-12-01), Hopkins
patent: 2843093 (1958-07-01), Vitausky
patent: 3509913 (1970-05-01), Lewis
patent: 3610568 (1971-10-01), Duwe
patent: 3698617 (1972-10-01), Fulzaya et al.
patent: 3806082 (1974-04-01), Kellner
patent: 3887161 (1975-06-01), Kubelka
patent: 3941348 (1976-03-01), Mott
patent: 4182219 (1980-01-01), Baatrap

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