Wellhead pressure valve opening and closing failure maintenance device and method thereof

Abstract

The invention discloses a wellhead pressure valve opening and closing failure maintenance device and a method thereof. The wellhead pressure valve opening and closing failure maintenance device comprises a bottom plate, a supporting plate, a side plate, a hydraulic cylinder, a top plate, a gland, a middle strengthening separation plate, a sealing cover and a lantern ring. The supporting plate andthe bottom plate are a group welding piece, the side plate is fixedly connected to the upper part of the bottom plate, the hydraulic cylinder is located at the top of the wellhead pressure valve switch failure maintenance device, and hydraulic oil is injected into the hydraulic cylinder to push a piston to move upward or downward. The top plate is connected with the hydraulic cylinder and is further fixedly connected with the side plate. The gland is located under the top plate and connected with a piston rod under the piston. The middle strengthening separation plate is located under the gland and is fixedly connected with the side plate, the sealing cover is located under the middle strengthening separation plate, and the lantern ring is arranged between the middle strengthening separation plate and the sealing cover for sealing. The wellhead pressure valve opening and closing failure maintenance device can repair and maintain faults such as opening or closing of a valve under the pressure of the shaft bottom in the case that an oil and gas field has the faults such as opening and closing failures during the mining operation and regardless of the ambient temperature.

Description

technical field [0001] The invention relates to the field of fault maintenance of oil exploitation equipment, in particular to a well head valve switch failure maintenance equipment under pressure and a method thereof. Background technique [0002] With the oversupply of oil and natural gas in the world, some mining manufacturers further reduce the cost or simplify the mining equipment, and the safety valve on the surface of the well is no longer needed, and the production gate valve is directly used as a safety valve. Once the gate valve fails, it will lead to various A safety hazard or an accident occurs. [0003] For example, when oil and natural gas are exploited in the north, due to the very low ambient temperature in winter, some valves are frozen at around minus 40°C, and some can only be opened or closed a little. In the end, the wells cannot be opened or closed, resulting in serious production. In the event of an accident, if the well is forcibly opened and closed,...

AI Technical Summary

Problems solved by technology

[0002] With the oversupply of oil and natural gas in the world, some mining manufacturers further reduce the cost or simplify the mining equipment, and the safety valve on the surface of the well is no longer needed, and the production gate valve is directly used as a safety valve. Once the gate valve fails, it will lead to various safety hazard or accident

[0003] For example, when oil and natural gas are exploited in the north, due to the very low ambient temperature in winter, some valves are frozen at around minus 40°C, and some can only be opened or closed a little. In the end, the wells cannot be opened or closed, resulting in serious production. Accidents, if the well is forcibly opened and closed, the valve stem on the valve will be twisted off, especially for natural gas wells, there must be no welding or open flames on site, otherwise the accident will be catastrophic

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