Pressure energized pipeline plug

Details Pressure energized pipeline plug Pressure energized pipeline plug

1983-09-28

1984-08-14

Bryant, III, James E.

Pipes and tubular conduits

With closures and plugs

Inflation stem type

405170, F16L 5510

Patent

active

044651040

ABSTRACT:
A plugging apparatus is disclosed for plugging the bore of a pipe at a selected location and withstanding a pressure differential thereacross that may equal or exceed the designed working fluid pressure of the pipe and includes a body adapted for insertion into the pipe bore and for axial movement within the pipe, the body including an upstream pressure head having a selected projected area and a support structure (which can conveniently be pigging discs) attached to and cooperating with the body for supporting the body axially in the pipe during movement in the pipe. A pipe gripping structure is carried by the body, locking engagement with the inside surface of the pipe. A plurality of annular elastomeric sealing members having a selected annular area are circumferentially mounted on the body. An actuating structure, such as a hydraulic cylinder, is provided for actuating the pipe gripping structure into locking engagement with the pipe and for applying an axial force to the compression sealing members for radially expanding the sealing members into engagement with the pipe wall.

REFERENCES:
patent: 3943982 (1972-03-01), Lecurdier
patent: 3978892 (1976-09-01), Scodino
patent: 4332277 (1982-06-01), Adkins et al.

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