Pressurized water injection device

Abstract

The invention relates to a pressurized water injection device. The device comprises a small double tee, an upper flange, a large double tee, a lower flange and sleeves which are sequentially connected, wherein a hanger is arranged in the large double tee; one side of the small double tee is provided with a liquid inlet valve, while the other side is provided with a liquid outlet valve; a pressurerelief pipe is arranged on a lower part of a sealer; the pressure relief pipe is communicated with a lower inner part of the sealer; an upper part of a booster pump cylinder is connected with the hanger so that the booster pump cylinder is hung on the large double tee; the upper part of an internal pump cylinder is connected with the lower part of the hanger; a polished rod passes through the sealer; the lower part of the polished rod is connected with a pressurizing plunger which is positioned in the booster pump cylinder; the polished rod is in matched seal with the internal pump cylinder; and the upper part of the polished rod is connected with an oil pumping unit. The oil pumping unit is used for pressurizing for water injection, the pressurized water has low pulse and large fluctuation and can be used for blocking removing and dredging of a stratum layer, the penetrability of the stratum layer is improved, and the injected water amount is increased; and as the oil pumping unit iscommon equipment and has the advantages of easy management, low management difficulty, less maintenance, low labor intensity, high water injection time rate, long cycle, and obvious economic benefitsand social benefits, the oil pumping unit is used for pressurizing the injection water.

Description

technical field [0001] The invention is equipment for water injection in an oil field, and is a pressurized water injection device. Background technique [0002] Individual water injection wells require high-pressure water to be injected into the formation. Various oilfields have adopted a variety of booster equipment, such as surface plunger pumps and centrifugal pumps. These pumps are used to boost the pressure on the existing water injection pipe network and inject them into the injection water that requires high pressure. In water wells, these pressurization equipment have shortcomings, mainly because the output pressure is stable, the pressure fluctuation is small, and it is not as effective as vegetables to penetrate the formation, and it cannot improve the permeability of the water injection layer. Ground plunger pumps and centrifugal pumps are used for pressurized water injection. Due to the high inlet and high output, there are serious problems in the sealing of the...

AI Technical Summary

Problems solved by technology

[0002] Individual water injection wells require high-pressure water to be injected into the formation. Various oilfields have adopted a variety of booster equipment, such as surface plunger pumps and centrifugal pumps. These pumps are used to boost the pressure on the existing water injection pipe network and then inject them into injection water that requires high pressure. In water wells, these pressurization equipment have shortcomings, mainly because the output pressure is stable, the pressure fluctuation is small, and it is not as effective as vegetables to penetrate the formation, and it cannot improve the permeability of the water injection layer.

Ground plunger pumps and centrifugal pumps are used for pressurized water injection. Due to the high inlet and high output, there are serious problems in the sealing of the ground plunger pumps and centrifugal pumps, which makes management difficult, frequent maintenance, labor intensity for workers, and frequent pressurized water injection. Pause, causing pressure fluctuations in the water injection well, causing expansion and contraction of tools in the well and formation sand discharge, shortening the water injection cycle, and causing major economic losses

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