Abandonment of a branch main

Details Abandonment of a branch main Abandonment of a branch main

1993-07-06

1994-07-12

Michalsky, Gerald A.

Fluid handling

Processes

Cleaning, repairing, or assembling

137315, 138 89, F16L 5510

Patent

active

053279247

ABSTRACT:
A method for abandoning a branch main 1 joined to a fluid-carrying spine main 2 comprises gaining access to the bore of the branch main 1 at an access point and then permanently blocking the bore of the branch main 1 at a blockage point closer to the junction then to the access point.

REFERENCES:
patent: 587102 (1897-07-01), Meany
patent: 1814677 (1931-07-01), Fennema
patent: 1906151 (1933-04-01), Goodman
patent: 1946138 (1934-02-01), Gardner
patent: 2390461 (1945-12-01), Racz
patent: 3032069 (1962-05-01), Ficklin
patent: 4245970 (1981-01-01), St. Onge
patent: 4458721 (1984-07-01), Yie et al.
patent: 4869281 (1989-09-01), Rockower
Abstract of U.S. Pat. No. 4,295,494.

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