Shear type gate valve

Details Shear type gate valve Shear type gate valve

1985-10-15

1986-09-23

Leppink, James A.

Wells

Means for perforating, weakening, bending or separating pipe...

With disparate below ground feature

251 13, E21B 2904

Patent

active

046129839

ABSTRACT:
A gate valve for cutting a wire line (20) and closing in a well has a gate assembly (24) formed of an upper gate (32) and a lower gate (34). The lower gate (34) closes first shearing the wire line. Upper gate (32) closes second and seals against upper valve seat (42).

REFERENCES:
patent: 3561526 (1971-02-01), Williams, Jr. et al.
patent: 4215749 (1980-08-01), Dare et al.
patent: 4313496 (1982-02-01), Childs et al.
patent: 4508313 (1985-04-01), Jones
patent: 4519575 (1985-05-01), Akkerman et al.
patent: 4531585 (1985-07-01), Hansen

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