Apparatus for the abandonment of a branch main

Details Apparatus for the abandonment of a branch main Apparatus for the abandonment of a branch main

1993-02-04

1995-01-10

Scherbel, David A.

Pipes and tubular conduits

With closures and plugs

Inflation stem type

138 97, F16L 5510

Patent

active

053798031

ABSTRACT:
A method and apparatus 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.

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patent: 694196 (1902-02-01), Rose
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patent: 3095844 (1963-07-01), Thielsch
patent: 3568721 (1971-03-01), Ross et al.
patent: 4013097 (1977-03-01), Calandra
patent: 4308824 (1982-01-01), Muta et al.
patent: 4413655 (1983-11-01), Brown
patent: 4456401 (1984-06-01), Williams
patent: 4607469 (1986-08-01), Harrison
patent: 4751947 (1988-06-01), Landers
patent: 4785857 (1988-11-01), Baars
patent: 4991651 (1991-02-01), Campbell

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