Pumping unit with wide swing angle

Abstract

The invention discloses a pumping unit with a wide swing angle, which comprises a motor, a bracket, a connecting rod, a speed change mechanism, a lifting rope, a fixed pulley, a wellhead oil pumping device, a rocker arm, a rocker arm pillar and two crankshaft wheels, wherein one end of the rocker arm is movably connected on the rocker arm pillar, the other end of the rocker arm is connected with the lifting rope, the lifting rope is connected with the wellhead oil pumping device by the fixed pulley which is arranged on the bracket, the two crankshaft wheels are connected with the speed change mechanism, one end of the connecting rod is movably connected with the rocker arm, and the other end of the connecting rod is movably connected with the crankshaft wheels. According to the pumping unit disclosed by the invention, the speed change mechanism is matched with the crankshaft wheels to pump oil, so that a pumping unit can be started and the working of the pumping unit can be maintained by a motor with relatively small power, and the pumping speed and the stroke of the pumping unit can be conveniently regulated.

Description

technical field [0001] The invention relates to the technical field of oil extraction machinery, in particular to a wide swing angle oil pumping unit. Background technique [0002] In oil exploitation, the beam pumping unit is mainly used to extract oil from the oil well. At present, the conventional beam pumping unit generally consists of a rope hanger, a donkey head, a beam, a frame, a connecting rod, and a reducer. , crank, balance device, base, frame and motor, etc., but the beam machine with this structure has the disadvantages of short stroke, small displacement, large volume, heavy weight, and high energy consumption. The problem of power grid distortion caused by power generation. [0003] In order to solve the above problems, the following patented technologies have been proposed in the prior art: [0004] Chinese Patent No. "201120146696.0" discloses a pulley-extended beam pumping unit. Its publication date is November 16, 2011. It includes a frame, a beam, a don...

AI Technical Summary

Problems solved by technology

[0007] 1. When the sling runs on the down stroke, there is no oil load on the sling, and the crank is only impacted by the weight of the beam and the donkey head. When the sling runs on the up stroke, the crank is impacted by the weight 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 may easily lead to damage to the crank, which not only affects the service life of the equipment, but also seriously causes safety accidents, and the crank Once damaged, it is difficult to repair, and it is more expensive to replace parts

2. Since the counterweight is at the bottom of its trajectory every time the beam traveling machine is started, and the weight of the counterweight is very heavy, a high-power motor is required to move the counterweight from the lowest point to the highest point of its trajectory Therefore, it is difficult to start the beam pumping unit, but when the beam pumping unit starts, it only needs half the power of the high-power motor to maintain the pumping operation, resulting in the power consumption of the pumping unit high

3. When the counterweight moves from the highest point to the lowest point of its trajectory, because the weight of the counterweight is very heavy, its downstroke speed will be very fast. When the downstroke speed of the counterweight is greater than the speed of the motor, the downstroke process The potential energy in the battery will be converted into electrical energy, thereby generating a large pulse current, causing serious distortion of the power grid, causing large-scale shutdown and crash of electrical equipment, that is, the so-called "swaying electricity" phenomenon, resulting in equipment damage and pumping. oil stop

4. At present, when the beam pumping unit is in operation, it is necessary to refuel the main box to increase the lubricity, but after refueling, the gearbox is prone to oil leakage, which will bring safety hazards and oil leakage

5. The beam pumping unit adopts a primary reduction mechanism. When the stroke times of the beam pumping unit need to be changed, the corresponding pulleys and belts need to be replaced. The replacement process is complicated and the replacement time is long, which affects production efficiency

6. The overall weight of the beam pumping unit is very heavy, the consumption of steel is large, and the cost of purchasing the pumping unit is high

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