Gate valve for shearing workover lines to permit shutting in of

Details Gate valve for shearing workover lines to permit shutting in of Gate valve for shearing workover lines to permit shutting in of

1979-02-05

1980-08-05

Leppink, James A.

Wells

Submerged well

Means removably connected to permanent well structure

166 55, 251 1A, 137 68A, E21B 2900

Patent

active

042157498

ABSTRACT:
A gate valve which is mounted on a wellhead assembly and which may be closed to shear off workover lines, macaroni tubing and other suspension members so as to quickly shut in a well under emergency conditions. The gate has a flow port which aligns with the flow passage of the valve when the gate is open. A cutting edge of the port cooperates with a corner area of the downstream valve seat to shear the suspension member when the gate is forcefully closed by a hydraulic actuator mechanism. An undercut open space is presented immediately below the cutting edge to accommodate the sheared suspension member without jamming the gate or otherwise hampering its closure function.

REFERENCES:
patent: 3716068 (1973-02-01), Addison
patent: 3766978 (1973-10-01), Orund et al.
patent: 3870098 (1975-03-01), Houston
patent: 3946806 (1976-03-01), Meynier
patent: 4130161 (1978-12-01), Jones
patent: 4132265 (1979-01-01), Williams, Jr.

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