CPC E21B 43/127 (2013.01) [E21B 47/009 (2020.05); F04B 47/022 (2013.01); F04B 49/02 (2013.01); G01D 5/3473 (2013.01)] | 5 Claims |
1. A control system for a vertical pumping unit, the control system comprising:
a programmable logic controller;
a position sensor device;
a position signal trigger device;
a position encoder device;
a remote communication modulus; and
a remote monitoring system,
wherein the control system is configured to control the vertical pumping unit via a method comprising:
during a self-learning phase:
obtaining a self-learning result;
controlling a motor of the vertical pumping unit according to initialization parameters to drive a pumping unit load end via a transmission system,
wherein the transmission system is equipped with the position signal trigger device and a shaft end of the motor is equipped with the position encoder device;
causing the vertical pumping unit to start running according to an initial full-stroke length and an initial stroke frequency,
wherein, in each stroke cycle, when the position signal trigger device reaches a forced reversing position sensor or a midpoint position sensor in the position sensor device, the position sensor device is triggered to generate a corresponding position signal, and wherein the control system is configured to read the position signal and control the motor to continue running in a same direction or to run in a reversing direction according to the position signal, the control system recording position data of the position encoder device each time a position signal is triggered; and
obtaining the self-learning result by calculating the average value of the recorded position data of the position encoder device; and
during a running phase:
controlling the motor of the vertical pumping unit to run according to the self-learning result and preset running parameters;
wherein the control system is configured to read and record a stroke frequency of the running phase, and
wherein, when the position signal trigger device reaches a position sensor in the position sensor device, the control system is configured to read the corresponding position signal generated by the position sensor device.
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