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US 2002/0162661 A1Published application
Delayed opening ball seat
AssigneeBaker Hughes Incorporated
InventorsChristiaan D. Krauss, George Givens
Life of this patent
Estimating the term…
Abstract
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.
Claims20
A ball seat assembly run in on a tubulars to operate a downhole tool, comprising:
- a body, having a bore therethrough, securable to the running tool,
- an enlargeable solid ball seat mounted in said body;
- and
- a support to selectively reinforce said seat for acceptance of a ball, said support, when disabled allowing the ball to enlarge said ball seat as it passes through.
1 more element
Dependencies are inferred from the claim text.