Multi-parameter collection and casing gas recycle device for oil well

[0003] In the process of oil production, oil production wells are also accompanied by a lot of natural gas. This part of the casing gas is stored in the casing and is called casing gas. Generally, the gas collection manifold is used to import it into the liquid production manifold, and it is transported through pipelines. To collect and recycle in the large tank of the joint station in the distance, the ball valve with the spring to control the pressure is commonly used on site. This kind of valve has many disadvantages. First, the spring machine is very easy to fatigue and break, not only loses the constant pressure function of the spring, but also loses the sealing effect between the steel ball and the ball seat when the spring is broken, which leads to the loss of control of the casing gas, and the accident of crude oil pouring into the casing; Casing gas will produce unstable flow after passing through the ball. Excessive gas volume will cause the steel ball and ball seat to be easily worn and out of round, which will affect the sealing effect of the constant pressure valve; especially for heavy oil and high pouring oil, the temperature is about 30 degrees During the casing gas storage process, if the oil in the gas gathering manifold solidifies; in addition, even for thin oil wells, when the production temperature is low in winter, the exhaust manifold of the casing gas will freeze, resulting Exhaust fails, casing gas pressure rises, oil well fluid level drops, and even casing gas is sucked in from the pump to form an air lock, which affects oil production. During production in winter, due to the low ambient temperature, gas collection manifolds often When the temperature is low, the oil in the pipe solidifies. Bec