A Double Sector Beam Extended Range Pumping Unit

Abstract

The invention discloses a double fan-shaped gear beam extended range pumping unit. The double fan-shaped gear beam extended range pumping unit comprises a engine base, a motor reducer, a crank, a connecting rod, an upper beam, a lower beam, an upper belt pulley, a lower belt pulley, a steel wire belt, a guide roller, a spring, a guide rod, cylinder pins and a sucker rod; a driving shaft of the motor reducer is connected with a crank key, the crank is rotatably connected with the connecting rod, the upper beam is rotatably connected with the engine base, the upper belt pulley and the connectingrod, the lower beam is rotatably connected with the engine base and the lower belt pulley, and a gear of the upper beam meshes with a gear of the lower beam; one end of the steel wire belt is connected with the sucker rod, and the other end is connected with the upper beam after passing through the guide roller, the upper belt pulley and the lower belt pulley; and the spring sleeves the guide rod, and the two ends abut against the upper beam and the lower beam. The motor reducer drives the upper beam and the lower beam to swing in the reverse direction through the crank and the connecting rod, and the reciprocating vertical extended range motion of the sucker rod is realized through the upper belt pulley, the lower belt pulley and the steel belt, the stroke of the sucker rod is long, andthe reversing is continuous without impact during the upstroke and the down stroke, the balance weight of the lower belt pulley and the crank and the spring can assist a motor in lifting oil pumping and prevent the sucker rod self-weight from driving the motor to carry out generate electricity, and the operation is reliable.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation equipment, in particular to a double sector gear beam pumping unit with extended range. Background technique [0002] Under the condition of shallow and deep well production, the rod-type beam pumping unit has been widely used in oilfields all over the world in the later stage of oil exploitation due to its advantages of continuous non-impact, simple structure and reliability in the reversing process of sucker rods. Under the condition of deep well oil production, due to the large elastic elongation of the sucker rod, it is often necessary to increase the stroke of the sucker rod to effectively improve the pumping efficiency of the pumping unit and reduce the energy consumption. The stroke of the sucker rod of the oil engine will double the length and total weight of its beam, which will double the manufacturing cost, driving torque and floor space, and make its safety worse. There...

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Problems solved by technology

[0004] Although the above-mentioned prior art has its own characteristics, it has also realized the range extension of the pumping unit to a certain extent, but there are still some technical problems: for example, the reliability of the electric commutation in the patent CN1061739C is not good enough; in the patent CN100564794C The mechanical reversing device of the lever-balanced sky-wheel long-stroke pumping unit has a large reversing impact force. At the same time, there are too many wheels in the speed-changing structure of the sky wheel, and they are arranged on the top of the frame. The belt winding life is low and the structure is relatively complicated; patent CN1007997B The chain-type range-extending mechanism is adopted, and the service life of the chain is low, etc.

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