Shearing gate valve

Details Shearing gate valve Shearing gate valve

E - Fixed Constructions

21

B

164/118

E21B 29/04 (2006.01) E21B 29/08 (2006.01) E21B 34/02 (2006.01) F16K 3/02 (2006.01) F16K 3/314 (2006.01) F16K 31/122 (2006.01)

Patent

CA 2012290

ABSTRACT OF THE DISCLOSURE A shearing type of gate valve having a sleeve of hard wear resistant material in the opening through the gate and coacting with an insert ring of hard, wear resistant material in one of the seat rings for shearing a wire line or tubular member extending through the valve and the gate, the sleeve and insert ring being assembled with the gate and the seat rings in a manner to provide sufficient compression preload thereon so that they are not subjected to tension loads which avoids chipping, breaking or other damage to the sleeve and the insert rings. Preferably the sleeve and insert ring are of tungsten carbide. In two forms of the present invention an insert sleeve of hard- ened, wear resistant material is provide in the opening of the gate and an insert ring of hardened, wear resistant material is provided in one of the seat rings so that the only a single shearing of the cable element is provided so that the short section is not created in the shearing and left in the opening through the gate while it is closed.

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