Novel alternate grasping rod type pumping unit and pumping method thereof

Abstract

The invention relates to a novel alternate grasping rod type pumping unit and a pumping method thereof. The pumping unit based on the pumping method is directly installed around a wellhead, and comprises an installation seat and a pair of belt pulling mechanisms longitudinally installed on the installation seat to drive a pumping rod to move longitudinally, the belt pulling mechanisms are connected with a grasping mechanism, the grasping mechanism is connected with the pumping rod in an oil well or a pulling rope connected with the pumping rod, a gear and rack mechanism is further horizontallyinstalled at the top of the installation seat, the belt pulling mechanisms are both connected with the gear and rack mechanism, the gear and rack mechanism is connected with a driving device, and a control device for controlling running of the driving device is further installed on the installation seat. The novel alternate grasping rod pumping unit has the advantages that the stroke of the pumping unit can be adjusted, walking beams and the counterweight are avoided, the structure is compact, the volume is small, carrying is convenient, and installation is easy; and the efficiency is high and energy conservation is achieved.

Description

technical field [0001] The invention relates to the field of oil pumping units, in particular to a novel alternate grab rod type oil pumping unit and an oil pumping method thereof. Background technique [0002] The function of the pumping unit is to pump the crude oil located deep underground to the surface. It has been produced and used for a long time, and has a history of hundreds of years so far. The beam pumping unit was the earliest and most widely used, which was born as early as 120 years ago. For more than 100 years, the structure and principle of the beam pumping unit have not changed substantially. [0003] The disadvantage of the beam pumping unit is that it is not easy to realize the requirements of long stroke and low stroke times, so it cannot meet the needs of heavy oil wells, deep oil wells and gas-bearing wells. At the same time, the long-stroke, low-stroke beam pumping unit has yet to be perfected and has few specifications, which cannot be applied to th...

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Problems solved by technology

[0003] The disadvantage of the beam pumping unit is that it is not easy to meet the requirements of long stroke and low stroke frequency, so it cannot meet the needs of oil production operations in heavy oil wells, deep oil wells and gas-bearing wells

At the same time, the long-stroke, low-stroke beam pumping unit has yet to be perfected and has few specifications, which cannot be applied to the current development of the petroleum industry.

[0004] Patent ZL201520154085.9 introduced a new type of long-stroke, low-frequency pumping unit, but limited by the fatigue life of the traction rope, the pumping unit needs to replace the traction rope frequently, and because the motor must continue Acceleration and deceleration may also have adverse effects on motor life and control

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