Ball valves

Wells – Above ground apparatus – Central valve or closure and lateral port

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Details

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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patent: 5535826 (1996-07-01), Brown et al.

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