Multifunctional double arm interaction single-drive-wheel self-speed-changing pumping unit

Abstract

The invention discloses a multifunctional double arm interaction single-drive-wheel self-speed-changing pumping unit which comprises a lifting arm assembly, a lifting rope, a wellhead pumping unit, a drive wheel, a torsion arm, a first power arm and a second power arm. The drive wheel is connected with a speed change mechanism. The torsion arm is fixed on the drive wheel. One end of the first power arm is movably connected with the torsion arm while the other end of the first power arm is provided with a fixed pulley and a lifting rope fixing hole. One end of the second power arm is movably connected with the first power arm while the other end of the second power arm is provided with a fixed pulley. The second power arm is provided with a base point. The second power arm reciprocates around the base point. One end of the lifting rope is fixedly connected with the wellhead pumping device through a fixed pulley on the lifting arm assembly. The other end of the lifting rope is fixed in the lifting rope fixing hole on the first power arm sequentially through the fixed pulley on the second power arm and the fixed pulley on the first power arm. By the pumping unit, stroke frequency can be adjusted conveniently, upstroke speed is increased, pumping efficiency is improved, and more oil can be pumped out of oil wells.

Description

technical field [0001] The invention relates to the technical field of oil production machinery, in particular to a multifunctional double-arm interactive single-drive wheel self-variable oil pumping unit, which is mainly suitable for 3m stroke. Background technique [0002] In oil extraction, beam pumping units are mainly used to extract oil from oil wells. At present, the conventional beam pumping unit generally consists of a rope hanger, a donkey head, a beam, a frame, a connecting rod, a reducer, a crank, a balance device, a base, a frame, and a motor. The beam beam machine has the disadvantages of short stroke, small displacement, large volume, heavy weight, and high energy consumption. The most important problem is the distortion of the power grid caused by self-generated electricity. [0003] In order to solve the above problems, the following patented technologies have been proposed in the prior art: [0004] For example, Chinese Patent No. "201120146696.0" disclos...

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Problems solved by technology

[0007] 1. Due to the very large friction between the wellhead pumping device and the oil pumping pipeline, there is a gap between the wellhead pumping device and the pipeline. Long-term use causes the gap to gradually increase, while the pumping unit in the prior art is pumping oil upwards The speed in the process is constant, which causes some of the oil pumped each time to flow out from the gap. With the gradual increase of the gap, the pumping unit not only pumps less oil each time, but also from new oil wells to In the middle or late oil well, the oil cannot even be pumped out from the oil well, and the oil pumping rate of the oil well is low. , to move the counterweight from the lowest point to the highest point of its motion track, a high-power motor is needed to start, so it is difficult to start the beam pumping unit, but when the beam pumping unit is started, it only needs Half of the power of the high-power motor can maintain the pumping operation, resulting in high power consumption of the pumping unit; 3. When the counterweight moves from the highest point to the lowest point of its trajectory, due to the weight of the counterweight is very heavy, the following The punching speed will be very fast. When the downstroke speed of the counterweight is greater than the speed of the motor, the potential energy in the downstroke process will be converted into electric energy, thereby generating a large pulse current, which will cause serious distortion of the power grid and cause motor equipment. Large-scale shutdown and crash, that is, the so-called "shock electricity" phenomenon, which leads to equipment damage and oil pumping stop; 4. At present, when the beam pumping unit is in operation, it is necessary to refuel the main box to increase lubricity , but after refueling, the gearbox is prone to oil leakage, and there is a big safety hazard in the oil pumping process; 5. The overall weight of the beam pumping unit is very heavy, and the amount of steel consumed is large. Purchasing the pumping unit Sixth, when the sling runs on the downward stroke, there is no oil load on the sling at this time, and the crank is only subjected to the self-weight impact of the beam and the donkey head. Therefore, during the oil pumping process, the impact force received by the crank is uneven and changes at any time, which will easily lead to damage to the crank, which not only affects the service life of the equipment, but also seriously causes safety problems. Accident, and the crank is damaged, it is difficult to repair, and if the parts are replaced, it will be more expensive

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