Novel oil well pump

Abstract

The invention relates to a novel oil well pump which comprises a barrel and a plunger arranged in the barrel. The barrel is of a hollow structure and a cavity is formed in the barrel. The plunger is arranged in the cavity in the long axis direction of the barrel and mainly comprises an end cover arranged at the upper end of the barrel, a sealing device connected to the lower end of the end cover and a pumping nozzle arranged at the lower end of the sealing device. The sealing device comprises a cylindrical sliding block, sealing blocks arranged on the outer wall of the cylindrical sliding block and compression springs for connecting the cylindrical sliding block with the sealing blocks, wherein the cylindrical sliding block is arranged in the cavity, an annular groove is formed in the side wall, and the compression springs are evenly distributed at the bottom of the annular groove. The novel oil well pump has the advantages that the sealing device of the novel oil well pump abandons a traditional whole block sealing structure, the sealing blocks are adopted to be matched with the compression springs, the airtightness of the compression springs and the barrel can be effectively guaranteed through the shrinkage of the compression springs, liquid is stopped from flowing back, the structural design is reasonable, and the service life is long.

Description

technical field [0001] The invention relates to a novel oil well pump, which belongs to the technical field of oil collection devices. Background technique [0002] The oil well pump is a common downhole device driven by the pumping unit to lift the crude oil in the well to the ground. At present, the pump barrel and plunger of the common oil well pump are mainly made of two kinds of materials, one is all rigid structure, and there is a gap between the two , unable to achieve a sealed state, due to the gap between the pump barrel and the plunger, under the action of the pressure difference, there will inevitably be liquid loss, and with use, there will be inevitable wear between the pump barrel and the plunger; there is also a One is that the piston uses elastic material, but the soft structure of the elastic material itself will increase the wear of the elastic material during the movement of the plunger, and the service life is short. Therefore, it is urgent to develop a n...

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Problems solved by technology

[0002] The oil well pump is a common downhole device driven by the pumping unit to lift the crude oil in the well to the ground. At present, the pump barrel and plunger of the common oil well pump are mainly made of two kinds of materials, one is all rigid structure, and there is a gap between the two , unable to achieve a sealed state, due to the gap between the pump barrel and the plunger, under the action of the pressure difference, there will inevitably be liquid loss, and with use, there will be inevitable wear between the pump barrel and the plunger; there is also a One is that the piston uses elastic material, but the soft structure of the elastic material itself will increase the wear of the elastic material during the movement of the plunger, and the service life is short. Therefore, it is urgent to develop a new type of piston with a reasonable structure design and a long service life. Oil well pump, after searching, no technical solution identical or similar to the present invention was found

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