Pumping unit time sharing speed adjusting device

Abstract

The invention relates to a pumping unit time sharing speed adjusting device. The device comprises a travel position detecting device, a control device and a man-machine interaction device; the travel position detecting device and the man-machine interaction device are respectively connected with the control device; an output end of the control device is connected with a pumping unit motor mounted on the ground; the travel position detecting device is used for detecting an operation position of a pumping unit; the man-machine interaction device is used for receiving and displaying speed adjusting control parameters input by users; and the control device is used for changing the power supply frequency of the pumping unit motor according to the operation position information of the pumping unit and the speed adjusting control parameters, so that the pumping unit motor rotates according to a first speed at the lower stroke of the pumping unit, and rotates according to a second speed at the upper stroke of the pumping unit, wherein the first speed is lower than the second speed. The pumping unit time sharing speed adjusting device can solve the problems of reducing the pumping efficiency and adding wear of pumping rods and oil pipes due to incapability of adjusting the upper stroke and lower stroke speeds of the pumping rods in the prior art.

Description

technical field [0001] The invention relates to the technical field of mechanical oil recovery, in particular to a time-sharing speed regulating device for an oil pumping unit. Background technique [0002] Crude oil extraction mostly uses reciprocating piston pumps, whose power source is electric motors on the ground. The function of the pumping unit is to convert the circular motion of the motor into an up and down reciprocating motion, and drive the underground piston through the sucker rod to achieve the purpose of pumping oil. And the electric motor rotates at a constant speed, which causes the pumping unit to have the same up and down stroke speed. [0003] The diameter of the oil pump piston is generally much larger than that of the sucker rod, and the liquid resistance it receives during the downstroke is greater than that of the sucker rod. When the pumping speed is greater than a certain value, the upper sucker rod will press the lower piston to move downward, wh...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the purpose of the present invention is to overcome the deficiencies of the prior art and provide a time-sharing speed regulating device for the pumping unit to solve the problem of reducing the pumping efficiency due to the unadjustable speed of the upstroke and downstroke of the sucker rod in the prior art. , increase the problem of sucker rod and oil pipe wear

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