Wells – Above ground apparatus – Central valve or closure and lateral port
Patent
1996-06-06
1999-02-02
Tsay, Frank S.
Wells
Above ground apparatus
Central valve or closure and lateral port
166 21, E21B 3406
Patent
active
058652469
ABSTRACT:
There is disclosed a ball valve (5) particularly for use in oil/gas wells. Known valves suffer from a number of problems, e.g such as high actuating forces and seat failure due to applied load across the ball being transferred through the seat. The present invention provides a ball valve (5) comprising a body (75) having a cylindrical bore containing a ball (10) and means for rotably mounting the ball (10) within the body (75) about a fixed axis, further comprising actuation means (15, 40, 45, 50) for controlling rotation of the ball (10), wherein in use to cause the ball (10) to rotate the actuation means (15, 40, 45, 50) is caused to move along a direction substantially parallel to an axis of the bore of the body (75).
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Petroleum Engineering Services Limited
Tsay Frank S.
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