One-way device for water injection and gas injection

Abstract

A water-injection gas-injection one-way device comprises a tubular upper connector, a tubular lower connector and a valve body assembly, and the valve body assembly comprises a tubular valve body container and a plurality of one-way valves. Counter bores which are the same as the one-way valves in number and used for containing the one-way valves are formed in the upper pipe wall of the valve bodycontainer in the circumferential direction of the upper pipe wall of the valve body container, and the axes of the counter bores are parallel to the axis of the valve body container. First air inletholes communicating with a water and gas injection pipeline is formed in the bottoms of the counter bores. Each one-way valve is sequentially provided with a sealing ball seat, a sealing ball, a piston, a spring and a spring seat from bottom to top. Second air inlet holes communicating with the first air inlet holes are formed in the center of the sealing ball seats. The spring seats are fixed atthe upper parts of the counter bores. The springs are compression springs. An annular groove communicating with the counter bores is formed in the middle of the counter bores in the axial direction ofthe valve body container in the direction towards the axis center of the valve body container, and the width of the annular groove in the axial direction of the valve body container is smaller than the radius of the sealing balls.

Description

technical field [0001] The invention relates to a water injection and gas injection one-way device, in particular to a water and gas injection one-way valve for oil and gas wells to establish multiple circulations, and belongs to the field of oil field technology. Background technique [0002] At present, the technology of gas injection and water injection in Tahe fracture-cavity reservoirs has entered the stage of popularization and application. After gas injection in thin oil wells, the properties of crude oil may become thicker. Go back up again to fill the wellbore. At this time, it is necessary to carry out the dilution operation to facilitate the smooth progress. Conventional downhole tools such as well killing sleeves cannot realize the multiple switching of downhole water injection and gas injection equipment to connect the tubing multiple times, which cannot meet the requirements of multiple dilute operation of the tubing string. Therefore need to develop a kind of...

AI Technical Summary

Problems solved by technology

Moreover, the structure of the existing water injection and gas injection device is complex, and it is easy to corrode and scale, and block the water injection and gas injection holes, resulting in the failure of the water injection and gas injection channels.

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