A quick-connect valve group for downhole oil circuit

Abstract

The invention relates to the technical field of petroleum downhole equipment, in particular to a quick connecting valve set of a downhole oil way. The quick connecting valve set comprises an upper quick connecting valve and a lower quick connecting valve, wherein the upper quick connecting valve comprises a valve sleeve, a first piston rod, a first spring and a stopping block; the first piston rod is arranged in the valve sleeve; the first piston rod is sleeved by the first spring; the stopping block is fixed at one end of the first piston rod; meanwhile, the first spring is fixed between the stopping block and the valve sleeve; the lower quick connecting valve comprises a piston, a second piston rod and a second spring; a necking structure and an oil passing hole are formed on the second piston rod; the second piston rod is sleeved by the second spring; and the second spring is fixed between the piston and a mounting hole of an oil way main body at the lower end by the piston. According to the invention, when the oil ways are abutted against with each other and separated from each other, hydraulic oil nearly reaches zero leakage, so that air entering a hydraulic system is less; and the quick connecting valve set of the downhole oil way, provided by the invention, has the advantages of compact structure, small size, rapidness, convenience and reliability in use and convenience for mounting and maintaining and can work under high temperature and high pressure petroleum downhole environments.

Description

technical field [0001] The invention relates to the technical field of petroleum downhole equipment, in particular to a downhole oil passage quick-connect valve group. Background technique [0002] In the prior art, to realize the connection and separation between two hydraulic oil circuits, a check valve is used as the sealing element when the oil circuit is separated. When connecting, the two ejector rods at the front end of the check valve spool collide, forcing the spool to leave the joint. The oil hole in the body allows the oil in the pipes on both sides to communicate. This kind of structure has a large volume and takes up a lot of space. It must be operated manually. It can only work in the ground environment. It is not suitable for oil well operations, and the temperature and pressure resistance indicators cannot meet the requirements. Contents of the invention [0003] The purpose of the present invention is to provide a downhole oil circuit quick-connect valve ...

AI Technical Summary

Problems solved by technology

This structure takes up a lot of space and must be operated manually. It can only work in the ground environment. It is not suitable for oil well operations, and the temperature and pressure resistance indicators cannot meet the requirements.

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