Isolation tool

Details Isolation tool Isolation tool

1996-01-29

1999-07-20

Ferensic, Denise L.

Pipes and tubular conduits

With closures and plugs

Inflation stem type

138 90, F16L 5511

Patent

active

059244542

ABSTRACT:
There is described an improved pipeline isolation tool for plugging a pipeline at a predetermined location, comprising a housing adapted for movement through a pipeline, the housing having first and second ends, seals disposed annularly about the housing, the seals being radially expandable into fluid sealing contact with an inner wall of the pipeline, and a plurality of braking members including grips for frictionally engaging the inner wall of said pipeline to lock the isolation tool in position against fluid pressure in the pipeline, the braking members being selectively and repetitively movable between a first position in which the grips are disengaged from the inner pipeline wall and a second position in which the grips engage the inner wall.

REFERENCES:
patent: 3593749 (1971-07-01), Reardon
patent: 4314577 (1982-02-01), Brister
patent: 4422477 (1983-12-01), Wittman et al.
patent: 4465104 (1984-08-01), Wittman et al.
patent: 4854384 (1989-08-01), Campbell
patent: 5293905 (1994-03-01), Friedrich
Hal Anderson, Tom Walls and Jim McLaws "Pipeline cut-outs using remote-controlled packers," Nowsco Pipeline Surveys & Services, Pipeline Pigging and Inspection Technology Conference, Houston, Texas, Feb. 17-20, 1992; pp. 1-20.

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