Actuator for a drill string internal blowout preventer

Details Actuator for a drill string internal blowout preventer Actuator for a drill string internal blowout preventer

1993-09-03

1996-04-16

Walton, George L.

Valves and valve actuation

Fluid actuated or retarded

With mechanical movement between actuator and valve

166319, 175218, 251 62, F16K 31163, F16K 31122

Patent

active

055074677

ABSTRACT:
A remotely operated actuator for a drill string internal blowout preventer is disclosed. It includes an annular cylinder for mounting on the preventer housing to rotate with the housing and the kelly. An annular piston in the cylinder moves a link pivotally connected to the piston and a crank arm to open and close the preventer.

REFERENCES:
patent: 3253518 (1966-05-01), Duemler
patent: 3298286 (1967-01-01), Tyler
patent: 3509913 (1970-05-01), Lewis
patent: 3737142 (1973-06-01), Boswell et al.
patent: 3806082 (1974-04-01), Kellner
patent: 3887161 (1975-06-01), Kubelka, Jr.
patent: 3941348 (1976-03-01), Mott
patent: 4316596 (1982-02-01), Krober et al.
patent: 4456217 (1984-06-01), Wingeart
patent: 4576358 (1986-03-01), Mott et al.
patent: 4700924 (1987-10-01), Nelson et al.
patent: 4795128 (1989-01-01), Krasnov et al.

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