Method and apparatus for cutting, sealing and opening pipe

Details Method and apparatus for cutting, sealing and opening pipe Method and apparatus for cutting, sealing and opening pipe

1999-04-23

2000-10-17

Walton, George L.

Fluid handling

Processes

Cleaning, repairing, or assembling

30 94, 83745, 137318, F16K 4300, B23D 2104, F16L 5518

Patent

active

061315974

ABSTRACT:
A method and apparatus for stopping or otherwise altering fluid flow in a pipeline at a desired location, originally without provisions to do so, and particularly suited for use with heavy wall pipes. The method and apparatus includes use of chip forming cutting tools that are carried in a circumferential orbit around the pipe within a housing assembled around the pipe. The cutting tools are progressively advanced into the wall of the pipe to cut two axially spaced circumferential grooves in the pipe wall. Thereafter, a shear plate with cutting edges coinciding with the grooves can be forced through the pipe to sever a coupon from it and thereby gain access and control over flow through it.

REFERENCES:
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patent: 3650547 (1972-03-01), Tickett
patent: 3652107 (1972-03-01), Tickett
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patent: 4370995 (1983-02-01), Smith
patent: 4516598 (1985-05-01), Stupak
patent: 5509440 (1996-04-01), Cantaloube et al.
patent: 5732728 (1998-03-01), Maichel

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