Ground Control Test Safety Valve

Abstract

The invention discloses a ground control test safety valve, which comprises an upper joint, a duck neck outer cylinder, a spring outer cylinder, a piston mandrel, a spring, a one-way valve, a ball valve outer cylinder, a ball valve assembly, a lower limit ball seat and a lower joint , the upper joint, duck neck outer cylinder, spring outer cylinder, ball valve outer cylinder and lower joint are sequentially fixedly connected to form a hollow shell, and the piston mandrel, spring, one-way valve, ball valve assembly and lower limit ball seat are arranged in sequence In the shell formed by the upper joint, the duck neck outer cylinder, the spring outer cylinder, the ball valve outer cylinder and the lower joint, the inner wall of the duck neck outer cylinder is provided with a control pipeline, a balance pipeline and a chemical injection channel, and the control pipeline maintains pressure to make the The ball valve assembly is always in the open state, and the pressure formed by filling the balance pipeline with nitrogen gas cooperates with the spring and the one-way valve to drive the ball valve assembly to close to cut the coiled tubing, and inject chemical agents to the bottom of the well through the chemical injection channel. The invention can cut test cables and coiled tubing by means of nitrogen filling pressure or balanced pipeline pressure.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field development equipment, and in particular relates to a safety valve for ground control testing. Background technique [0002] my country is a country with less oil and more gas. From Daqing to Liaohe, from Yanchang to Shengli Oilfield, from Yumen to Karamay, from the East China Sea to the South China Sea, oil wells need accurate logging positions and reserves to increase production. Oil and gas production. The original logging tool body is lifted to the surface to analyze the underground storage, which is labor-intensive, has large data deviations, high production costs and is not easy to operate. When an abnormal situation occurs downhole, the original logging tools cannot play more roles, so that the abnormal situation cannot be dealt with in time, and the work intensity is increased. Contents of the invention [0003] The present invention aims at the deficiencies of the above-menti...

AI Technical Summary

Problems solved by technology

The original logging tool body is lifted to the surface to analyze the underground storage volume, which is labor-intensive, has large data deviations, high production costs and is not easy to operate

When an abnormal situation occurs downhole, the original logging tools cannot play more roles, so that the abnormal situation cannot be dealt with in time, which increases the work intensity

Images