Winded direct-drive motor oil pumping unit

Abstract

The invention discloses a winded direct-drive motor oil pumping unit. The winded direct-drive motor oil pumping unit comprises a permanent magnet motor, a chain transmission system, a roller assembly, a roll-over table, a guide wheel assembly, a belt clamp structure, a flexible connection mechanism, a truss assembly, a locating wheel, a weight box, an electromagnetic brake device, a staircase, a front platform and a guardrail. The winded direct-drive motor oil pumping unit is characterized in that the permanent magnet motor and the roller assembly are fixed on top of the truss assembly and connected through the chain transmission system, the roll-over table is connected with the upper portion of the front side of the truss assembly, the guide wheel assembly and the belt clamp structure are fixed at the outer end of the roll-over table, one end of the flexible connection mechanism is fixed, the other end of the flexible connection mechanism is connected with a beam hanger and the weight box in the truss assembly, the electromagnetic brake device is installed at a non-input end of the roller assembly, and the staircase, the front platform and the guardrail are arranged on one side, front side and top portion of the truss assembly respectively. The winded direct-drive motor oil pumping unit has the advantages that the reduction gearbox and the reversing device are omitted, the structure of the complete oil pumping unit is simple, the efficiency is improved, the long stroke and self-lifting hanging pumping are achieved, and sufficient well repairing space can be supplied.

Description

technical field [0001] The invention relates to a beamless long-stroke pumping unit, which belongs to the technical research field of oil extraction machinery. Background technique [0002] Mechanical oil extraction is the main means of oil extraction in oilfields, among which the beam pumping unit is dominant. Currently, CNPC is using 121,610 conventional beam pumping units. The working principle of the beam pumping unit is to use the three-phase asynchronous motor to drive the reduction box through the V-belt, and then through the four-bar linkage mechanism to change the rotation motion output by the reduction box into a linear reciprocating motion, and then transmit this motion through the sucker rod. Pumping the plunger in a downhole well pump. However, the beam pumping unit has shortcomings such as unreasonable structure, high energy consumption, and low power factor. The average efficiency of the system is only 24%, and the cost of oil production is high. Cost, count...

AI Technical Summary

Problems solved by technology

However, the beam pumping unit has shortcomings such as unreasonable structure, high energy consumption, and low power factor. The average efficiency of the system is only 24%. Cost, countries continue to improve beam pumping units and develop beamless pumping units, but the developed out-of-phase beam pumping units have not yet solved the problem of "big horse-drawn and small carts", and the energy-saving effect is not significant; Various forms of beamless long-stroke pumping units developed have both advantages and disadvantages, and there is room for further research and improvement

In addition, with the continuous development of oilfields, oil extraction conditions have become increasingly complex, and oil extraction technology has put forward new requirements for rod pumping equipment such as long strokes, low strokes, and deep pumping with large pumps. Beam pumping units have been Difficult to meet the requirements of new oil recovery technology

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