Downhole constant flow adjustable water injection distributor

Abstract

The invention discloses a downhole constant flow adjustable water injection distributor. A main body is provided with a vertical compensation hole, a throttle hole is formed below the compensation hole, an upper communicating hole and a lower communicating hole are formed in the side wall of the main body, a valve ball is placed in the compensation hole, a blind hole is formed in a piston, a communicating hole is formed in the side surface of the piston, the piston is installed in the compensation hole, the blind hole communicates with the lower communicating hole through a communicating groove, the piston is sealed with the compensation hole in a matched mode, a spring is placed in the compensation hole, an upper end port of the compensation hole is closed by a screw plug, the lower partof an upper joint is connected with the upper part of the main body, a fixed claw groove is formed in a positioning pipe, the lower part of the positioning pipe is connected with a lower thread in theupper joint, an internal communicating hole is formed in the lower part of the main body, a movable claw groove is formed in a flow regulating sleeve, the upper part of the flow regulating sleeve isinserted into the lower part of the main body, a plurality of flow regulating grooves are formed in the outer wall of the flow regulating sleeve, the lower part of the main body is connected with theupper part of a lower joint, a sealing ring is installed between the lower part of the main body and the upper part of the lower joint, and the lower part of the flow regulating sleeve is inserted into a centralizing hole of the lower joint.

Description

technical field [0001] The invention is a downhole layered water injection tool for oil field water injection, and is an adjustable downhole constant flow water injection distributor. Background technique [0002] When developing oilfield water injection, it is necessary to inject water into the water injection well. Generally, the water injection well has multiple water injection layers. Water distribution is carried out according to the distribution amount, and a water injection distributor is required for water distribution, that is, each water injection layer has a water injection distributor. One of the existing water injection distributors is a hollow regulator. After the existing hollow water injection regulator adjusts the injection volume, the water injection volume cannot remain unchanged, and it will still fluctuate with the change of the ground water injection pressure and the water absorption capacity of the formation. The actual There is still a large gap betw...

AI Technical Summary

Problems solved by technology

One of the existing water injection distributors is a hollow regulator. After the existing hollow water injection regulator adjusts the injection volume, the water injection volume cannot remain unchanged, and it will still fluctuate with the change of the ground water injection pressure and the water absorption capacity of the formation. The actual There is still a large gap between the injection volume and the designed injection volume, resulting in inaccurate formation water injection volume, which cannot meet the injection injection requirements, making the oilfield unable to achieve the ideal water injection effect, and affecting oilfield development and production

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