Movable cylinder oil well pump

Abstract

The invention relates to a movable cylinder oil well pump, and belongs to the technical field of oil extraction machinery. The movable cylinder oil well pump mainly comprises a pump cylinder assembly,a plunger assembly and an outer pipe bushing assembly, the pump cylinder assembly is arranged at the left end of the plunger assembly through a pump cylinder coupling, and the plunger assembly is arranged at the left end of the outer pipe bushing assembly through a plunger coupling. The movable cylinder oil well pump has the advantages that sand production of oil wells can be effectively avoided,the movable cylinder oil well pump cannot be buried by sand, and the movable cylinder oil well pump can be smoothly lifted out of a wellhead; and a multi-stage sealing structure is adopted in an internal structure of the movable cylinder oil well pump, so that sealing failures caused by the fact that the sand is cushioned at the sealing position of a valve ball and a valve seat can be effectivelyreduced, pump inspection of the rod type oil well pump is facilitated, the pump inspection workload is reduced, manpower and material resources are saved, and the movable cylinder oil well pump is suitable for efficient exploitation of sand and gas outlet type oil wells.

Description

technical field [0001] The invention relates to the technical field of oil extraction machinery, in particular to a moving barrel oil well pump. Background technique [0002] The rod well pump does not need to lift the oil pipe when inspecting the pump, but only needs to lift the sucker rod to lift the pump out for maintenance. Therefore, the rod well pump is convenient for pump inspection, with less work workload and short operation time. Rod pumps are prone to stuck pumps, the plunger moves up and down with the pump barrel, the wellhead does not come out of fluid, or sand cushions on the valve ball and valve seat, resulting in no fluid at the wellhead, and frequent workovers occur. [0003] Some oil wells will produce sand, and the sand will be deposited between the rod pump and the base, causing sand burial. When the plunger and the pump barrel enter the gap between sand particles or scale and wax, they are all in a downward state. The self-downward force of the column i...

AI Technical Summary

Problems solved by technology

Rod pumps are prone to stuck pumps, the plunger moves up and down with the pump barrel, and the wellhead does not produce fluid, or sand cushions on the valve ball and valve seat, resulting in no fluid at the wellhead, and frequent workover

[0003] Some oil wells will produce sand, and the sand will be deposited between the rod pump and the base, causing sand burial. When the plunger and the pump barrel enter the gap between sand particles or scale and wax, they are all in a downward state. The self-downward force of the column is easy to release the jamming, and the sand grains descend from the gap between the plunger and the pump barrel due to gravity, which greatly reduces the probability of pump jamming; To a certain extent, it complicates the operation of the pump inspection operation. Not only does it need to deal with the sucker rod undercut, but also lift the oil pipe to inspect the pump, which increases the workload of the pump inspection operation and causes the loss of manpower and material resources.

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