High-efficiency direct drive type pumping unit with single movable pulley and single fixed pulley

Abstract

The invention relates to a high-efficiency direct drive type pumping unit with a single movable pulley and a single fixed pulley. The high-efficiency direct drive type pumping unit comprises a tower which is fixed on a cement foundation. A platform welding rack is fixed at the top of the tower. The upper platform of the platform welding rack is provided with a motor, a driving wheel, a guiding seat and a guiding arm. According to the high-efficiency direct drive type pumping unit, a direct motor driving manner is used. Furthermore a sucker rod and a counterweight end are respectively provided with a fixed pulley assembly and a movable pulley assembly. A requirement for a motor torque is greatly reduced, thereby reducing cost, facilitating maintenance and improving the integral operation efficiency of the pumping unit. Furthermore the high-efficiency direct drive type pumping unit is provided with a winch first steel band, and therefore automatic elevation of a counterweight can be realized and dodging and resetting of a front guiding arm can be easily performed, thereby realizing more convenient well maintenance. Furthermore a drawer type structure is adopted for dodging and resetting of the guiding arm, thereby realizing higher safety.

Description

technical field [0001] The invention relates to the field of petroleum machinery, in particular to a high-efficiency direct-drive oil pumping unit with a single-acting pulley and a single-fixed pulley. Background technique [0002] The existing external rotor motor direct drive type pumping unit has the simplest transmission system, only the permanent magnet motor is used to directly drive the hoisting wheel to drive the sucker rod and the counterweight to reciprocate up and down. Significant, but also has its drawbacks or shortcomings: [0003] In the process of oil pumping operations in oilfields, it is often necessary to perform well workover or well cleaning operations. At this time, structures such as the donkey head or guide wheel or guide arm of the oil pumping equipment need to make room for the vertical above the oil well, so as to facilitate the operation. Equipment hoisting sucker rod. The existing new pumping units can be roughly divided into several types acco...

AI Technical Summary

Problems solved by technology

The existing new pumping units can be roughly divided into several types according to their structural characteristics, such as complete machine displacement, guide arm backward rotation displacement, electric displacement, etc. Among them, the complete machine displacement needs to move the entire equipment backward. Operation, so the structure is complicated and the consumables are large, and the safety is poor, which is far less flexible than other methods of giving way

The backward rotation of the guide arm generally has a large and complex structure, and does not use its own driving parts as the driving source for the guide arm rotation, so the operation is cumbersome. On the one hand, the backward rotation of the guide arm limits the space for front and rear adjustment of the guide arm when the wellhead is aligned. On the other hand, the guide arm is flipped backwards and vacated. If there is a failure of the lifting belt and manual operation is required, the safety is not high.

Moreover, most of the pumping units directly driven by external rotor motors cannot lift the counterweight by themselves, and need the assistance of a crane, which reduces the practicality to a certain extent.

[0004] In addition, the existing external rotor motor direct drive pumping unit adopts a hoisting structure. If the transmission system is rigid, sometimes the well conditions are bad, and when the pump is suddenly stuck, it will cause impact on the transmission system such as the hoisting belt, wire rope, and motor. , which affects its life and also poses a safety hazard to the equipment

At the same time, since this structure is fixed on the equipment by the hoisting belt or wire rope, it is difficult to achieve fine adjustment except for moving equipment or transmission parts when aligning the wellhead.

In addition, if the lifting belt is hoisted and wound, it is easy to stick or the winding effect is not good, it is easy to damage the lifting belt, and the service life is low

Images