A micro-motion wellhead gate valve

Abstract

The invention discloses a micro-motion wellhead gate valve. The micro-motion wellhead gate valve comprises a hand wheel, an upper valve cylinder, a valve body, a lower valve cylinder, a threaded rod,a valve plate, a connecting piece and a filtering device. Flanges are arranged at the two ends of the valve body. The upper valve cylinder and the lower valve cylinder are arranged on the side wall ofthe valve body and communicate with the valve body. The valve plate is arranged in the valve body. The filtering device is arranged at the lower end of the valve plate and cooperates with the lower valve cylinder. The connecting piece is arranged at the upper end of the valve plate. The threaded rod is arranged in the upper valve cylinder, the lower end of the threaded rod is connected with the connecting piece, and the upper end of the threaded rod is connected with the hand wheel. The hand wheel is arranged on the top of the upper valve cylinder. The connecting piece is arranged inside thevalve plate, after the valve plate is closed, petroleum circulation can continue through ascent and descent of the connecting piece, and therefore the situation that due to the phenomenon that the valve plate is closed due to the operation error, the problems that the wellhead pressure rises, a wellhead device is pressed to be damaged, and petroleum leakage happens exist is avoided, the loss of resources is avoided, facilities are protected, the overhauling frequency is reduced, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of wellhead gate valves, in particular to a micro-motion wellhead gate valve. Background technique [0002] The hundreds of thousands of oil wells in major oil fields in China are basically operated by pumping units. The wellhead gate valve is inseparable from the pumping process. During the production process, if there is a wrong operation, the wellhead gate valve will be closed, causing The original extracted by jumping is boosted at the wellhead, thereby destroying the sealing device in the oil pumping polished rod sealer, so that the original overflows, resulting in significant resource loss. [0003] At present, in order to ensure the safety of production, it is necessary to carry out regular inspection and maintenance of equipment, but it consumes a lot of manpower, the cost is high, and it cannot be inspected and observed all the time. Contents of the invention [0004] The present invention aims a...

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Problems solved by technology

[0002] The hundreds of thousands of oil wells in major oil fields in China are basically operated by pumping units. The wellhead gate valve is inseparable from the pumping process. During the production process, if there is a wrong operation, the wellhead gate valve will be closed, causing The original pumped out is boosted at the wellhead, thereby destroying the sealing device in the oil pumping rod sealer, causing the original to overflow, resulting in significant resource loss

[0003] At present, in order to ensure the safety of production, it is necessary to carry out regular inspection and maintenance of equipment, but it consumes a lot of manpower, the cost is high, and it cannot be inspected and observed all the time.

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