Methods and apparatus for shutting a conduit

Details Methods and apparatus for shutting a conduit Methods and apparatus for shutting a conduit

1992-05-21

1993-04-06

Bui, Thuy M.

Wells

Processes

Perforating, weakening, bending or separating pipe at an...

166 55, E21B 2908

Patent

active

051994933

ABSTRACT:
A conduit is shut off by a shut-off valve mechanism which is attached to an external periphery of an exposed region of the conduit. That region is exposed by excavation from the ground surface. A drill mounted on the fixture is actuated to cut out a section of the conduit. A sealing shoe mechanism carried by the drill is positioned within the cut-out section of the conduit and is actuated to make sealing contact with the cut edges of the conduit in order to block the passage of fluid therethrough. Alternatively, the drill can be eliminated by preforming a gap between two sections of the conduit and providing the body with a through-hole which is aligned with the conduit sections until the sealing shoe is displaced into the gap.

REFERENCES:
patent: 4580626 (1986-04-01), Jones
patent: 4646825 (1987-03-01), Van Winkle

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