Wells – Packers or plugs – With expanding anchor
Patent
1992-05-04
1994-05-24
Dang, Hoang C.
Wells
Packers or plugs
With expanding anchor
166139, 166188, 166242, 166330, 166334, E21B 3312, E21B 3412
Patent
active
053140141
ABSTRACT:
Preferential disconnection of a valve-actuating subassembly from a temporary abandonment safety valve and packer assembly is provided by stops which limit relative rotation between the valve-actuating subassembly within the valve along with a locking collar associated with the interconnection between the safety valve and the packer assembly so that high torque associated with rotational movement of a drill string in a highly deviated hole effects the release of the proper portion of the assembly without danger of undesirable release of other interconnections.
REFERENCES:
patent: 2507262 (1950-05-01), McGivern
patent: 2942665 (1960-06-01), Davis et al.
patent: 3461962 (1969-08-01), Harrington
patent: 3643737 (1972-02-01), Current et al.
patent: 4313497 (1982-02-01), Graham
patent: 4871018 (1989-10-01), Caskey et al.
patent: 5154228 (1992-10-01), Gambertoglio et al.
Dang Hoang C.
Dowell Schlumberger Incorporated
Littlefield Stephen A.
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