Intelligent ultra-long stroke winch oil pumping unit

Abstract

The invention relates to an intelligent ultra-long stroke winch oil pumping unit which is composed of an electric control cabinet, a balance weight system, a base, a winch system and a pumping system.The electric control cabinet is connected with the balance weight system, the winch system and the pumping system through cables, the balance weight system is connected with the winch system througha steel wire rope, and the winch system is connected with the pumping system through a flexible polish rod. The winch system comprises a displacement sensor, a motor, an electromagnetic brake, a winchsupport, a speed reducer, an outer-square cylinder and a roller. Steel wire rope tension of the balance weight system and flexible polish rod tension of the pumping system are located at the two endsof the axis of the roller and are opposite in direction. The intelligent ultra-long stroke winch oil pumping unit is used for improving the stroke of the oil pumping unit, eliminating an included angle generated between the flexible polish rod and a head sheave, prolonging the service life of the flexible polish rod, realizing the balance weight of the ultra-long stroke oil pumping unit, and further saving energy, by adding an intelligent chip, the pump efficiency, the yield and the annulus liquid level position of an oil jacket can be instantly reflected, and the oil pumping speed is automatically adjusted or oil is intermittently pumped according to liquid supply data. Efficient operation is achieved.

Description

technical field [0001] The invention belongs to a rod pump pumping unit of an oil production system in the petroleum field, and in particular relates to an intelligent ultra-long-stroke hoisting pumping unit. Background technique [0002] At present, rod pumping equipment in oilfields includes beam pumping units, tower pumping units, and hydraulic pumping units. High, so that the time for the oil to enter the oil well pump is short, resulting in insufficient filling of the oil well pump, accompanied by impact load every time, low pump efficiency and system efficiency, large wear of rods, pipes, and pumps, frequent pump inspections, and high maintenance and operation costs. At the same time, due to the influence of the elasticity of the sucker rod itself and the limitation of the small stroke, the above-mentioned equipment basically cannot be used in deep pumping wells. In response to this problem, in recent years, there has also been research on the emergence of "long-strok...

AI Technical Summary

Problems solved by technology

[0002] At present, rod pumping equipment in oilfields includes beam pumping units, tower pumping units, and hydraulic pumping units. High, so that the time for the oil to enter the oil well pump is short, resulting in insufficient filling of the oil well pump, accompanied by impact load every time, low pump efficiency and system efficiency, large wear of rods, pipes, and pumps, frequent pump inspections, and high maintenance and operation costs

At the same time, due to the influence of the elasticity of the sucker rod itself, coupled with the limitation of the small stroke, the above equipment basically cannot be used in deep pumping wells

In response to this problem, in recent years, there has also been research on the emergence of "long-stroke chain pumping units". For example, the Chinese patent number is "201420465806.3", and the patent name is "long-stroke chain pumping units". Although the structure of the pumping unit is called Long stroke, the actual stroke length is up to 10 meters, and it has not been realized to reach 20 meters or more than 50 meters

[0003] In addition, the Chinese patent number is "201520965060.7", and the patent name is an invention patent of "a long-stroke pumping unit". The disadvantage is that the roller in this design can only rotate and cannot move along the axis

When rotating, the angle formed between the flexible polished rod on the drum and the groove of the sky wheel on the wellhead support of the oil well will become larger and larger, and the non-metallic sealing material on the surface of the flexible polished rod will be squeezed by the groove edge of the sky wheel. The service life is getting shorter and shorter

Although the angle can be reduced by lengthening the distance between the drum and the sky wheel to prolong the service life of the flexible polished rod, the problem of damage to the flexible polished rod cannot be completely solved, which limits the use of this equipment for oil production on offshore platforms; In addition, the flexible polished rods are composed of metal and non-metallic materials, and the surface is non-metallic materials. Under the condition of bearing load, only one layer can be arranged on the surface of the drum. If two or more layers are arranged, the flexible polished rods will be squeezed up and down The non-metallic material on the surface is damaged, causing oil leakage at the wellhead packing box, and the drum cannot be enlarged infinitely, so it is difficult for this equipment to achieve a stroke of more than 50 meters, especially on a site with a small footprint; at the same time, the long stroke The pumping unit does not have a counterweight mechanism. Due to the inability to counterweight, it needs to be equipped with a larger power motor, which does not achieve the maximum energy saving effect, which limits the use of this equipment on deep pumping wells.

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