Magnetic suspension machine-pump integrated underground oil extraction device

Abstract

The invention relates to a magnetic suspension machine-pump integrated underground oil extraction device used during oil extraction in the field of oil fields. The magnetic suspension machine-pump integrated underground oil extraction device comprises an oil well pump cylinder and an internally-arranged throwing-salvage pup joint. The throwing-salvage pup joint is connected with a magnetic suspension motor runner through an adapting connector, the lower end of the magnetic suspension motor runner is connected with an oil well pump movable valve combination, the outer wall of the oil well pump cylinder is sleeved with a magnetic suspension motor stator, and the magnetic suspension motor stator is placed inside a shell. The magnetic suspension machine-pump integrated underground oil extraction device has the sand prevention function, the wax prevention function and the stepless adjustment function, is compact in structure, efficient, free of maintenance, long in service life, capable of greatly reducing the production cost and particularly suitable for land oil wells and offshore oil wells such as deep wells, directional wells, wax precipitation wells, thickened oil wells and evacuation oil wells, and saves energy.

Description

technical field [0001] The invention relates to downhole oil production equipment used in oil production in the field of oil fields, in particular to a magnetic levitation pump integrated downhole oil production device with sand and wax prevention functions used in directional wells, horizontal wells, high wax content wells and offshore oil fields. Background technique [0002] In the field of oil production in oilfields, most of the oil pumping equipment in various oil fields are conventional beam pumping units. The main problems are high energy consumption, low efficiency, many accessories, heavy weight, and transmission parts. Too many, the loss of parts and the loss of energy are staggering. The working process of the traditional beam pumping unit is as follows: the motor drives the reducer, the reducer drives the pulley, and the pulley drives the crank connecting rod to turn the rotating circular motion into the up and down linear reciprocating motion of the donkey head...

AI Technical Summary

Problems solved by technology

The main manifestations are high energy consumption, heavy weight, difficulty in long-stroke and low-stroke pumping, increased accidents of sucker rods during production, and reduced displacement of oil well pumps, etc.

According to statistics, the belt loss of the beam pumping unit is 15%, the power loss of the reducer is 9%, the power loss of the four-link structure is 3-6%, and the energy loss of the above three aspects is about 30-35%. The weight of the beam pumping unit is even more incapable of operation

In order to overcome these shortcomings, since the 21st century, a new reciprocating submersible pump has appeared, that is, the magnetic levitation motor is connected with the oil well pump, which has obvious energy-saving effect, but the structure is not perfect, and there are inherent problems because the pump and the magnetic levitation motor are connected by The connecting rods are connected, so that the axial dimension of the overall structure is too long, the pressure rod is easy to lose stability, the stroke is mostly 1.2 meters to 1.5 meters, and the pumping coefficient of the oil well pump is not high

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