Sand control gate valve for high sand content oil and gas well production

Abstract

The utility model discloses a kind of sand control gate valves for high sand content oil and gas well production, including valve body and gate, annular inner cavity is equipped in valve body, first sand control valve seat and second sand control valve seat are equipped in annular inner cavity;First sand control valve seat is equipped with boss, recess is equipped on second sand control valve seat, boss is inlaid in recess, boss is equipped with upper sealing ring and lower sealing ring, boss is opened with wave spring, wave spring is located between upper sealing ring and lower sealing ring, wave spring is compressed between first sand control valve seat and second sand control valve seat, outer sealing ring and inner sealing ring are equipped between first sand control valve seat and valve body;A kind of sand control gate valve for high sand content oil and gas well production of the utility model, structure design is ingenious, sealing high reliability, reduce maintenance replacement cost, improve production efficiency and economic benefits, especially suitable for medium sand content large harsh working condition.

Claims

1. A sand control gate valve for use in the production of a high sand content oil and gas well, characterized by: It includes a valve body and a gate. The valve body is provided with an annular inner cavity for accommodating the gate. A first anti-sand valve seat and a second anti-sand valve seat are provided on each side of the gate in the annular inner cavity. The first sandproof valve seat has a boss, and the second sandproof valve seat has a corresponding groove. The boss is fitted into the groove. The boss has an upper sealing ring and a lower sealing ring. The boss has a spring groove located between the upper sealing ring and the lower sealing ring. A wave spring is provided in the spring groove. The wave spring is compressed between the first sandproof valve seat and the second sandproof valve seat. The surface of the first sandproof valve seat that contacts the valve body has an outer sealing ring and an inner sealing ring.

2. A sand control gate valve for use in the production of a high sand content oil and gas well as claimed in claim 1, characterized in that, Two sand-proof baffles are symmetrically arranged on the side of the second sand-proof valve seat near the gate. The lower end of the sand-proof baffle is tightly fitted with the upper part of the second sand-proof valve seat, and the two sides of the sand-proof baffle are restricted to the cavity wall of the annular inner cavity.

3. A sand control gate valve for use in the production of a high sand content oil and gas well as claimed in claim 2, characterised in that, It also includes a valve stem and a tail stem, which are fixedly connected to the upper and lower parts of the gate, respectively, and a handwheel is connected to the upper end of the valve stem.

4. A sand control gate valve for use in the production of a high sand content oil and gas well as claimed in claim 3, characterised in that, The valve body has symmetrical sand-flushing holes on both sides of its lower part, and the sand-flushing holes are equipped with sealing caps.

5. A sand control gate valve for use in the production of a high sand content oil and gas well as claimed in claim 4, characterised in that, The upper sealing ring, lower sealing ring, outer sealing ring, and inner sealing ring are all rubber sealing rings.

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