Wells – Processes – Placing or shifting well part
Reexamination Certificate
2005-02-01
2005-02-01
Bagnell, David (Department: 3672)
Wells
Processes
Placing or shifting well part
C166S192000, C166S153000, C166S285000
Reexamination Certificate
active
06848511
ABSTRACT:
Aspects of the present invention provide apparatus and methods of releasing a plug. In one aspect, a plug and ball seat assembly for releasing a plug is disclosed. The assembly is selectively maintained in a housing using a mounting system. The plug and ball seat assembly includes a ball seat selectively connected to the plug. The mounting system is designed such that disengaging the ball seat from the plug also disengages the plug from the housing, thereby releasing the plug. In another aspect, a method of releasing a plug includes selectively connecting a ball seat to the plug and disposing the plug and ball seat assembly within a tubular. When the plug is ready for release, the ball seat is disconnected from the plug and allowed to move axially relative to the plug. In turn, the plug and ball seat assembly disconnects from the tubular and releases downhole.
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U.K. Search Report, Application No. GB 0327739.9, dated Mar. 1, 2004.
Jones Frank
Wooley Elmer F.
Bagnell David
Bomar T Shane
Moser, Patterson & Sheridan L.L.P.
Weatherford / Lamb, Inc.
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