High-temperature and high-pressure wellhead thermal recovery valve

Abstract

The invention provides a high-temperature and high-pressure wellhead thermal recovery valve. The high-temperature and high-pressure wellhead thermal recovery valve comprises a valve body and a gate plate, wherein a fluid flow passage of the lower part (inside) of the valve body communicates with an inlet and an outlet of the valve body, the fluid flow passage in the valve body is provided with a pair of parallel sealing rings which are embedded into the valve body 1 and are perpendicular to the fluid flow passage; the gate plate is embedded into the pair of parallel sealing rings, the gate plate moves up and down in the fluid flow passage in the valve body, and namely a pair of sealing rings, a valve rod and a hand wheel which are fixed with the gate plate are used for controlling the gateplate to move; the up and down movement positions of a valve plate correspond to the turn-on and cut-off of the valve (partial cut-off until whole cut-off); the upper part of the gate plate and the valve rod are provided with sealing elements which are embedded into the valve body; and the first plane of each sealing ring is attached to the valve plate, and the sealing rings and the inlet and outlet center line on the valve body are arranged on the same straight line.

Description

Technical field: [0001] The invention is suitable for projects such as electric heating and steam injection in oil fields, especially a special valve for high-temperature and high-pressure wellhead thermal recovery valves that controls heavy oil thermal recovery and high-temperature and high-pressure steam. Background technique: [0002] With the rapid development of our country's national economy. The required electricity and crude oil have doubled, and there are more and more valves used to control steam pipelines. At the same time, more and more heavy oil fields have been developed and constructed. Due to the high density and hardening of heavy oil, it is necessary to inject high temperature and high pressure Steam is used to melt heavy oil, and the content of corrosive substances such as sulfide in crude oil is high. The valve at the wellhead plays a key role. First, high temperature and high pressure steam is injected through the valve to melt the heavy oil. The high...

AI Technical Summary

Problems solved by technology

[0003] The traditional heavy oil steam pipeline adopts a stop valve, which has large flow resistance, large operating force distance, inconvenient operation and low efficiency

The entire pipeline is very long, which is extremely inconvenient, and at the same time, the equipment cost becomes larger

Because the gate plate cannot solve the high resistance of the sealing ring and the compensation after long-term wear and tear

The service life is extremely short, and new valves need to be replaced in less than 10 months, resulting in great waste, as well as the impact of shutdown on production during replacement and the need for a lot of manpower

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