Pressure set and retrievable vented anchor-seal for pipeline ser

Details Pressure set and retrievable vented anchor-seal for pipeline ser Pressure set and retrievable vented anchor-seal for pipeline ser

1985-03-11

1987-04-21

Marcus, Stephen

Pipes and tubular conduits

With closures and plugs

Inflation stem type

138 97, F16L 5512

Patent

active

046588604

ABSTRACT:
A workman safety tool for use in the maintenance and repair of open pipelines, and comprising an anchor and a seal that are simultaneously operable and actuated by remote pressure application to ensure securement of the tool while work proceeds, with a pressure test plug and valve to determine and/or to release pressure before release of the tool.

REFERENCES:
patent: 3561490 (1971-02-01), Little
patent: 3586056 (1971-06-01), Kipp
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patent: 4144908 (1979-03-01), Dunn
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patent: 4385643 (1983-05-01), Noe
patent: 4413655 (1983-11-01), Brown
patent: 4422477 (1983-12-01), Wittman et al.
patent: 4452070 (1984-06-01), Kipp
patent: 4498811 (1985-02-01), Fern et al.

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