System for monitoring running of oil extractor in oil field

Abstract

The invention discloses a system for monitoring the running of an oil extractor in an oil field. A motor protector is arranged at a driving motor of the oil extractor, and a host computer is arranged in a centralized monitoring center, wherein wireless signal transmitting/receiving units are arranged on the motor protector; and the host computer compares received state changing rules of running current parameters of the driving motor, remotely reads the running current parameters of the driving motor to perform comparison, and judges various faults. Preset values and preset changing rules of the running current parameters of the driving motor can be obtained from curves in an oil well indicator diagram or from load analyses in a four-stroke process of the oil extractor. A 'one-to-many' wireless signal transmission network structure is adopted between a wireless signal retransmitting/relaying unit and each wireless signal transmitting/receiving unit; and wireless signals of a plurality of the wireless signal transmitting/receiving units are uploaded to the host computer. A GPRS wireless communication network is adopted between the wireless signal retransmitting/relaying unit and the host computer to perform data transmission so as to transmit the wireless signals to the host computer.

Description

technical field [0001] The invention belongs to the field of equipment operation monitoring, in particular to a monitoring system for the operation of an oil field pumping unit. Background technique [0002] Energy is closely related to people's life and work and is indispensable. Oil extraction can greatly meet the needs of people's lives and meet the needs of my country's economic construction. [0003] my country needs to add 20,000 new oil production wells every year. And these new oil wells will all be equipped with wellhead oil production equipment - pumping unit. [0004] The beam pumping unit is the ground power equipment of the downhole oil pump. [0005] A conventional beam pumping unit consists of a motor, a reducer and a four-bar linkage. It has a long history, simple structure, reliable use, convenient operation and maintenance, long-term reliable and safe operation in harsh natural environments, etc., so that it has been widely used in oil field production....

AI Technical Summary

Problems solved by technology

[0011] Although this technical solution uses a combination of various measuring instruments and devices to solve the problem of "too few types of faults that can be monitored", it has shortcomings such as too complicated circuit module structure and insufficient use of existing monitoring devices. The cost of permanent investment is high, and the workload of operation management / maintenance after equipment purchase is relatively cumbersome, which is not conducive to promotion and is not easy to be accepted by users

[0012] In addition, it was found in actual work that since the drive motor of the existing pumping unit is connected to the load by a drive belt, if the belt breaks / falls off during the operation of the pumping unit, although the drive motor is still working normally Rotate, but the pumping unit cannot work normally, at this time, no alarm signal will be issued from the operation control circuit of the drive motor (because the main circuit of the motor and the control circuit have no faults), resulting in the long-term no-load operation of the motor, due to The power of the driving motor of the pumping unit is usually large, which will cause a lot of waste of electric energy. In winter in the north, it is easy to block the oil pipeline and cause unnecessary losses.

[0013] To sum up, it can be seen that in the existing monitoring methods, there is no simple and easy detection method for the abnormal "light / no-load" fault of the driving motor of the pumping unit, which is easy to be accepted by users

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