Claims
- 1. A subsurface well safety valve including:
- an elongate tubular valve housing having means for connecting it in a well flow conductor and having a bore therethrough in flow communication with the flow conductor for flow of fluids therethrough from the well formation;
- a rotatable valve closure member having a transverse flow passage therethrough;
- an upper seat member and a lower seat member above and below said valve closure member and engageable therewith for controlling flow through the valve closure member and the housing bore; and
- means for supporting the valve seat members on the valve housing for movement with respect thereto including:
- tubular fluid pressure operating piston means to provide a fluid pressure chamber in said housing for receiving control fluid pressure for moving said operating piston means to move the valve closure member longitudinally axially of the housing;
- a spring housing;
- connecting means for releasably connecting the upper end of the spring housing with the tubular valve housing above the seat members and closure member;
- elongate operator means movable longitudinally in said spring housing for moving said lower seat member longitudinally of the spring housing toward said tubular housing;
- spring means in said spring housing engageable with said elongate operator means for biasing the lower seat member and valve closure member toward said tubular valve housing;
- actuating means between the tubular housing and the spring housing and engageable with the valve closure member for rotating said closure member about a transverse axis relative to the longitudinal axes of the housings for moving the closure member between open and closed positions;
- said connecting means connecting said spring housing with said tubular housing and providing openings disposed between said tubular housing and said spring housing in which the valve closure member, seat members, and actuating means are disposed, said openings permitting said closure member to have a transverse dimension substantially equal to the external diameter of the tubular housing, whereby the bore of flow passage through the valve closure member, through the tubular operating piston means, through the valve seat members and through the tubular housing may be a maximum in diameter.
- 2. A subsurface well safety valve including:
- an elongate tubular valve housing having a bore therethrough;
- means for connecting said valve housing in a well flow conductor for controlling flow through the said conductor;
- a rotatable valve closure member mounted in said valve housing and having a transverse flow passage therethrough into and out of communication with the flow passage of the housing;
- an upper valve seat member in the valve housing above the valve closure member and engaging said valve closure member to coact therewith to control flow through the housing;
- a lower valve seat member in engagement with the valve closure member below and opposite the upper valve seat member and movable therewith for also controlling flow through the valve closure member and the valve housing;
- piston means slidable in the bore of said valve housing above said upper valve seat and engageable with said valve seat members to move same;
- means for conducting fluid pressure into the valve housing to act on the piston means to cause the same to move the valve closure member;
- a spring housing connected at its upper end with the lower end of the valve housing and having spring biasing means therein and spring actuator means engaged by said spring biasing means and engaging said lower valve seat member for moving said lower valve seat member;
- actuating means fixedly secured between the valve housing and the spring housing and having actuating pin means thereon engageable with complementary radially extending groove means on the valve closure member for causing rotation of the valve closure member as the valve seat members and closure member are moved longitudinally by the piston means and by the actuator means energized by the spring means; and
- connector means connecting the spring housing with the valve housing providing enlarged window openings therebetween in which the valve closure means member is movable to permit the valve closure member to have a diameter substantially equal to the exterior diameter of the valve housing and the spring housing and so permit a larger flow passage through the valve closure member and the valve housing.
Parent Case Info
This is a continuation, of application Ser. No. 399,455, filed Sept. 21, 1973 now abandoned, and which is a divisional application of Ser. No. 214,679, filed on Jan. 3, 1972 and which issued on Jan. 29, 1974 as U.S. Pat. No. 3,788,594.
US Referenced Citations (6)
Divisions (1)
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Number |
Date |
Country |
Parent |
214679 |
Jan 1972 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
399455 |
Sep 1973 |
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