Self-adaptive separated layer water injection regulation and control valve

Abstract

The invention relates to a self-adaptive separated layer water injection regulation and control valve. The regulation and control valve comprises a mounting short joint, wherein the outer side walls of two ends of the mounting short joint are provided with external threads, mechanical packers are respectively in threaded connection with two ends of the mounting short joint, four water injection valve bodies are symmetrically welded to the outer side walls of the mounting short joint, a semispherical cavity is formed in each water injection valve body, and the water injection valve bodies comprise pistons; four through holes are symmetrically formed in the outer side walls of the mounting short joint and are in positional correspondence with water inlet mouths, and the water injection valve bodies are communicated with the cavities of the mounting short joint; one end of a piston guiding track is welded to the middle of a base, the piston is in sleeved connection with the piston guiding track, a piston spring is arranged between the piston and the base and is in sleeved connection with the piston guiding track, and the sector of the piston is matched with the semispherical cavities; and threads are formed at the edges of the semispherical cavities of the water injection valve bodies, the edge of the base is provided with external threads, and the base is in threaded connection with the semispherical cavities.

Description

technical field [0001] The invention belongs to the technical field of hydraulic components, and relates to an adaptive layered water injection regulating control valve. Background technique [0002] In the process of oilfield water injection development, the reservoir physical parameters of water injection wells have different change characteristics, and show more significant changes with the prolongation of development time. [0003] During layered water injection, due to the difference in permeability between layers in the vertical direction, it is difficult to achieve synchronization of the water injection water lines. These problems will bring difficulties to the design of the later stage of water injection development and the preparation of distribution plans. It makes it difficult to achieve synchronous control of the injection volume of water injection wells in different layers, and it is still impossible to meet the actual water injection development needs according...

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Problems solved by technology

[0003] During layered water injection, due to the difference in permeability between layers in the vertical direction, it is difficult to achieve synchronization of the water injection water lines. These problems will bring difficulties to the design of the later stage of water injection development and the preparation of distribution plans.

It makes it difficult to achieve synchronous control of the injection volume of water injection wells in different layers, and it is still impossible to meet the actual water injection development needs according to the designed layered water injection volume, and it is also impossible to accurately predict the reasonable layered injection volume, which affects the development effect of water injection wells and crude oil production. Enhanced recovery

[0004] In the traditional general water injection technology, due to the different permeability of each layer, the advancing speed of the water injection line is different. The water injection in the high permeability layer is fast, and the water injection in the low permeability layer is slow. It is easy to cause water flooding and water channeling in the production well, which is very unfavorable for improving the recovery rate; however, the current common artificial layered water injection technology has very high requirements for mastering the physical parameters of the reservoir in the early stage, and the selection of water nozzles, High cost and complicated process for pipe string lowering

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