Core expansion type mechanical valve changing device under pressure

Abstract

The invention relates to the technical field of gate valve replacement devices, and is an expansion core type mechanical belt pressure replacement valve device, which includes a fixed frame, a push rod, a connecting plate, a pushing plate, a process flange and a sealing flange. There are no less than two double-headed screws fixed between them, no less than one hydraulic cylinder is fixed on the connection plate, there is a passage hole in the middle of the connection plate, and there is a piston rod in the hydraulic cylinder, the piston rod and the push plate fixed together, the right end of the push rod is fixed on the push plate, and the middle part of the push rod is located in the passing hole. The invention has a reasonable and compact structure and is easy to use. It can replace the gate valve under pressure. In the process of replacing the gate valve, it can ensure good sealing performance, prevent pressure leakage, and avoid damage to the oil layer when the gate valve is replaced by killing the well. Pollution and crushing, thereby avoiding the resurrection of the crushed oil layer, and avoiding the sewage discharge operation of the polluted oil layer, saving the cost of oil and gas exploitation 。

Description

technical field [0001] The invention relates to the technical field of gate valve replacement devices, and relates to a core-expanding mechanical belt pressure replacement valve device. Background technique [0002] As the exploitation of oil and gas fields gradually enters the mid-to-late stage of exploitation, during the exploitation process, the working environment of the Christmas tree and its valves deteriorates, they are constantly corroded by hydrogen sulfide, exposed to the sun and rain for a long time, and the valves are frequently switched on and off, resulting in damage, so the valve needs to be replaced frequently. However, in the process of pressurized production, when the valve of the Christmas tree is damaged, it is difficult to replace it. The existing method of replacing the valve is to press the well and then replace the valve. This will cause the medium and low pressure wells in the middle and late stage of exploitation to be crushed to death or pollute t...

AI Technical Summary

Problems solved by technology

[0003]The present invention provides a core-expanding mechanical belt pressure replacement valve device, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem of existing gate valve replacement devices. Problems of polluting production layers and crushing oil layers in the process of replacing gate valves

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