Beam-pumping unit

Abstract

The invention relates to a beam-pumping unit, which includes a motor, an actuating device and a pumping unit device connected in sequence; the pumping unit device comprises the connection shaft of the frame of the pumping unit, a foldable balancing weight, and a clutch which disconnects the connection shaft of the frame of the pumping unit and the foldable balancing weight when starting the motoras well as reconnects the connection shaft of the frame of the pumping unit and the foldable balancing weight when starting the pumping unit. The foldable balancing weight is set to be under an unfolded state when starting the motor, and under the folded state when starting the pump unit. The beam-pumping unit breaks through the design concept of the current pumping unit, sets the balancing weight of a 'monolithic block' pumping unit into the foldable balancing weight, and uses a mechanical energy storing principle to improve the efficiency of the motor of the pumping unit. The beam-pumping unit not only can reduce the installed power of the motor of the pumping unit to radically solve the technical defect of 'big Marathi car' of the motor of the pumping oil in the oil field, and also canimprove the efficiency of the motor during the running process of the pumping unit, and reduce the impact on power systems.

Description

technical field [0001] The invention relates to a beam pumping unit, in particular to a beam pumping unit with a foldable balance weight. Background technique [0002] The beam pumping unit is one of the important working equipment in the oil field. When working, each beam pumping unit needs to be equipped with a corresponding induction motor. Since the squirrel cage rotor induction motor (hereinafter referred to as the motor) has the advantages of simple structure, reliable operation, and low cost, the motor is widely used in oil field pumping. In the oil machine. [0003] The pumping unit in the oil field is different from the general load. The pumping unit is in the pumping state during the upstroke, the load is large, and the output of the motor is also large; during the downstroke, the pumping unit basically does not work, the load is small, and the output of the motor is also small. In order to balance these two working states, the pumping unit generally has a counte...

AI Technical Summary

Problems solved by technology

It can be seen from the calculation that the use of this motor will lose 4029 kWh / year of active power and 17082 kWh / year of reactive power, and increase a large amount of line loss, which will increase the impact on the power grid

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