Piston pumps for oilfield water injection

Abstract

The invention discloses a plunger pump applied to oilfield water injection. The plunger pump comprises a base and a supporting frame, the supporting frame is fixedly arranged on the base, a plunger cylinder is fixedly arranged on the upper side wall of the base, the plunger cylinder is located in the supporting frame, a plunger cavity is formed in the plunger cylinder, and a matched plunger is connected into the plunger cavity in a sealed and sliding mode; a corresponding sealing plug is arranged at the upper end of the plunger cylinder, the plunger penetrates through the sealing plug upwardsand is fixedly connected with a top plate, and stretchable rods are symmetrically arranged between the upper side wall of the top plate and the inner wall of the upper side of the supporting frame; and each stretchable rod is sleeved with a corresponding first spring, and the first springs are located between the inner wall of the upper side of the supporting frame and the upper side wall of the top plate. According to the plunger pump, through cooperative use of a hollow cylinder, a water blocking plate, a third spring and a buffering plate, the buffering effect is better, flow blocking is effectively carried out to reduce the pressure of incoming water, the pressure of a water outlet pipe is durable and stable, impact caused by too large pressure is avoided, and the service life of the plunger pump is prolonged.

Description

technical field [0001] The invention relates to the technical field of oilfield plunger pumps, in particular to a plunger pump used in oilfield water injection. Background technique [0002] The plunger pump is an important device in the hydraulic system. It relies on the reciprocating movement of the plunger in the cylinder to change the volume of the sealed working chamber to realize oil absorption and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow adjustment. The plunger pump is widely used in the occasions of high pressure, large flow and flow adjustment. One of the effective measures for crude oil production, and the plunger pump is widely used in oil reservoir water injection due to its small size and high working pressure. [0003] In real life, the plunger pump works in a high-pressure environment, which will also bring about the technical problem of excessive vibration of the overall...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the defect that the pressure at the outlet end of the plunger pump in the prior art is very large, and the high-pressure water with a large impact force often causes relatively large impact and vibration damage to the pipelines and instrumentation facilities at the outlet end, thereby proposing a method for applying Piston pump for oilfield water injection

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