Delayed opening ball seat

Details Delayed opening ball seat Delayed opening ball seat

E - Fixed Constructions

21

B

E21B 34/06 (2006.01) E21B 34/10 (2006.01) E21B 34/14 (2006.01)

Patent

CA 2384478

A removable ball seat assembly is disclosed. It features a solid ball seat backed up by segmented dogs pinned to each other and mounted under the ball seat. Upon actuating a downhole tool with fluid pressure applied to a ball on the seat, the pressure is increased and the ball and seat move at a regulated rate. The dogs reach a recess and the ball moves through the seat. Subsequent, larger balls can pass through the seat, with the dogs in the recess, at much smaller pressure drops than the original ball.

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