Ground hydraulic augmented injection pump

Abstract

The invention provides a ground hydraulic augmented injection pump, which is used for oilfield underground water injection. The pump comprises an inlet-filtering pressure-reducing device, a liquid inlet joint, a pressure-increasing liquid outlet joint, a pump body and a pressure-increasing outlet water-distribution joint, wherein the inlet-filtering pressure-reducing device is provided with a filter and a pressure-reducing valve with a check valve; the liquid inlet joint is connected with a water outlet of the inlet-filtering pressure-reducing device; the pump body comprises a shell body, a liquid supply pipeline, reversing valves which are sequentially and coaxially arranged in the shell body along the axis of the shell body, a power cylinder, a reversing control device and a pressure-increasing cylinder; one end of the shell body is connected with the liquid inlet joint, and the other end of the shell body is connected with the pressure-increasing liquid outlet joint; the liquid supply pipeline is connected with the pressure-increasing cylinder; each reversing valve is provided with a first channel, a second channel and a plurality of ports; the first channel and the second channel are communicated with a right cylinder body and a left cylinder body of the power cylinder respectively; and the pressure-increasing outlet water-distribution joint connected with the pressure-increasing liquid outlet joint is provided with a water distributor with the check valve. The ground hydraulic augmented injection pump has the advantages of capability of meeting the requirements of various water injection wells on water injection, long life span, high efficiency and energy conservation.

Description

technical field [0001] The invention relates to a special water injection pump for oil fields, in particular to using the incoming water from the pipe network of the pumping station as power to finally increase or decrease the pressure of the incoming water; Or the oil pump is used as power to drive the power cylinder to finally increase the pressure of the incoming water. Background technique [0002] At present, oilfield water injection in the world basically uses a single pump pressure to inject water into multiple wells. Therefore, there are generally under-injection wells that need to be boosted and low-pressure water injection wells that need to be adjusted. Distinguishing different well conditions A new type of injection booster pump powered by incoming water, rather than simply relying on pressure reducing valves and electric booster injection pumps to achieve single-well partial pressure water injection is to solve under-injection of water injection wells in oil fie...

AI Technical Summary

Problems solved by technology

[0004] (1) Since the ground double-pressure hydraulic booster pump does not process the high-pressure flowing water from the pump station before booster injection, the impurities in the incoming water will affect the service life of the booster pump and reduce the pump efficiency;

[0005] (2) This kind of surface dual-pressure hydraulic injection pump also needs to be used in conjunction with the water distributor placed in the well, and it is troublesome to replace the water distributor placed in the well;

[0007] (4) The liquid inlet valve and liquid discharge valve of the booster cylinder are set in a separate delivery pipeline, which is easily damaged in the open air

[0008] (5) This kind of surface dual-pressure hydraulic booster injection pump cannot fine-tune the incoming water pressure. When the pump efficiency decreases or the pressure of the water injection well increases, another booster injection pump must be replaced

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