Wells – Packers or plugs – With expanding anchor
Patent
1978-09-27
1980-02-19
Leppink, James A.
Wells
Packers or plugs
With expanding anchor
166135, 166317, E21B 3312
Patent
active
041889991
ABSTRACT:
A well tool assembly is provided which is adapted to be set within a well bore. The assembly comprises a main body having a main passage. Means on the main body are provided for securing the main body within the well bore. An expendable plug is provided and housed within the passage to prevent flow of fluid therethrough. The plug assembly comprises a top sub, a longitudinally extending mandrel and piston means. First disengaging means are provided for selectively securing the top sub to the piston means or the mandrel. Second disengaging means are provided for selectively securing the top sub to the other of the piston means and the mandrel. Seal means are located on the plug assembly for prevention of fluid transmission thereacross. First and second no-go elements on at least one of the main body and the expendable plug are operational with third disengaging means which, in turn, are initially housed within the main body and between the no-go means, and initially secured to at least one of the piston means and the mandrel, the no-go means resisting upper and lower longitudinal movement of the third disengaging means.
REFERENCES:
patent: 2928469 (1960-03-01), Crowe
patent: 3002563 (1961-10-01), Crowe
patent: 3131765 (1964-04-01), Myers
patent: 4007783 (1977-02-01), Amancharla et al.
Baker International Corporation
Leppink James A.
Norvell, Jr. William C.
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