A control valve for a hydraulic wellhead safety valve control system
A control system and safety valve technology, applied in wellbore/well valve devices, wellbore/well components, earth-moving drilling, etc., can solve the problems of oil and gas well production stagnation, affecting work efficiency, low safety performance, etc. The effect of reducing the requirements of machining accuracy, improving the stability of use, and avoiding the influence of control accuracy
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[0019] The present invention will be further described below in conjunction with the drawings.
[0020] Such as figure 2 The control valve for the hydraulic wellhead safety valve control system shown includes a valve body 11, a valve hole 18 located in the center of the valve body 11, a valve core 13 located in the valve hole 18, and a front end of the valve body 11 connected by threads. The valve cover 16, the rear valve cover 4 connected to the other end of the valve body 11 through threads; the valve core 13 intermittently fits with the valve hole 18 is provided with a fourth sealing ring 12, and the front valve cover 16 and the valve body 11 are connected with a first Five sealing rings 17, a second sealing ring 6 is provided at the connection between the rear valve cover 4 and the valve body 11; an inner cavity fluid cylinder 21 and an inner cavity fluid are sequentially arranged in the valve body 11 at one end connected to the rear valve cover 4 The cylinder 21 communicat...
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