Wells – Packers or plugs – With expanding anchor
Patent
1980-03-18
1982-02-02
Pate, III, William F.
Wells
Packers or plugs
With expanding anchor
166133, 166217, 166330, E21B 2306
Patent
active
043134971
ABSTRACT:
An upstanding valve body assembly is provided defining a center axis and includes radially expandable and retractable slips. The assembly includes a slip actuator rotatable relative to the remainder of the assembly about the center axis for expansion and retraction of the slips responsive to rotation of the slip actuator in opposite directions. A suspension member projects above the actuator and is threadedly engaged therewith for threaded shifting relative thereto along the axis. The suspension member is threadedly disengageable and engageable with the actuator portion upon rotation relative thereto in first and second directions, respectively. The actuator portion is operative to expand and contract the slips upon rotation thereof relative to the remainder of the body assembly in the first and second directions, respectively, and the actuator portion and suspension member include abutment portions engageable with each other to limit threaded engagement of the suspension member with said actuator portion in a manner to releasably frictionally jam the suspension member against its rotation relative to the actuator portion responsive to rotation of the actuator portion in said second direction. The body assembly defines an axial passage therethrough including an axially shiftable valve member for opening and closing the passage, the valve member being biased to the closed position, and the actuator portion and valve member include coacting structure for moving the valve member to its open position upon final movement of the actuator portion toward the jammed position relative to the actuator portion.
REFERENCES:
patent: 2178999 (1935-11-01), Scoh
patent: 2305062 (1942-12-01), Church et al.
patent: 2696886 (1954-05-01), Ware
Jacobson Harvey B.
Pate III William F.
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