Multi-section centering self-rotating reducer oil pipe pump

Abstract

The invention relates to a multi-section centering self-rotating reducer oil pipe pump. An integral oil pump is used as a center pump cylinder. The pump cylinder is provided with an upper joint and a lower joint. A plunger assembly is installed in the pump cylinder and is formed by a reducer plunger unit. The reducer plunger unit at least comprises two stages. The reducer plunger unit of each stage is provided with a self-propelled reducing mechanism and a self-rotating pushing mechanism. The self-propelled reducing mechanism and the self-rotating pushing mechanism are sheathed on the frame of the reducer plunger unit of the corresponding stage. A connecting bearing capable of automatically centering is arranged between two adjacent reducer plunger units. An upper thruster is arranged at the upper end of the plunger assembly. The upper thruster with bolted with a rotator. An anti-collision mechanism is installed at the upper end of the rotator and comprises an anti-collision bar, an anti-collision bar joint and an anti-collision block. A sand scraping cup is sheathed on the external side of the anti-collision bar joint. A sand retainer is sheathed on the external side of the upperend of the anti-collision block. An anti-sand-burying rotating half-ball standing valve assembly is arranged at the lower end of the plunger assembly.

Description

technical field [0001] The invention relates to equipment for pumping wells, in particular to a centering self-rotating variable-diameter tubing pump. Background technique [0002] At present, the used oil well pumps for pumping units both at home and abroad are rod pumps based on API standards, divided into pipe type and rod type. After nearly 60 years of use, certain disadvantages have been reflected: especially in the actual well conditions of oil wells in the middle and later stages of oil production, pumps with this structure will cause problems such as sand sticking, sand burial, rod string breakage, and oil rod couplings. Many problems such as eccentric wear and valve leakage have brought a lot of inconvenience to oil production plants, especially due to these faults, frequent maintenance operations of oil wells have affected production and increased operating costs, making oil production costs high and wasting funds. Consumes energy and pollutes the environment. ...

AI Technical Summary

Problems solved by technology

After nearly 60 years of use, certain disadvantages have been reflected: especially in the actual well conditions of oil wells in the middle and later stages of oil production, pumps with this structure will cause problems such as sand sticking, sand burial, rod string breakage, and oil rod couplings. Many problems such as eccentric wear and valve leakage have brought a lot of inconvenience to oil production plants, especially due to these faults, frequent maintenance operations of oil wells have affected production and increased operating costs, making oil production costs high and wasting funds. consume energy, pollute the environment

[0003] Because of this, the inventor has devoted himself to the research and development of downhole oil well pumps for more than 20 years, and has successively developed some rotary plunger oil pumps, self-rotating plunger oil well pumps, energy storage ball valves and rotary sucker rod couplings, etc. These patents Although the product plays a certain role in oil production, there are still some unsatisfactory points, especially in the late stage of oil field development and the situation of a large amount of sand and scaling in the oil well caused by polymer flooding, the plunger will go down Excessive resistance and other problems cause the plunger to be easily damaged and cause frequent operation failures

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