Intelligent driving device for oil field pumping unit

A driving device and pumping unit technology, which is applied in the fields of production fluids, wellbore/well components, earth-moving drilling, etc., can solve the problems of low motor power factor, large waste of electric energy, low oil well output, etc., and reduce reactive power loss. , avoid downtime and improve reliability

Inactive Publication Date: 2004-08-18
戈璜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current driving devices widely used in oil wells use power frequency power to directly drive the motor. The working speed of the pumping unit is fixed and cannot be changed accordingly with the geological conditions of the oil reservoir. The result is: the motor Low power factor, large waste of electric energy, low oil well production and severe wear of pumping units

Method used

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  • Intelligent driving device for oil field pumping unit
  • Intelligent driving device for oil field pumping unit
  • Intelligent driving device for oil field pumping unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1. A kind of intelligent driving device of oilfield pumping unit, as figure 1 and image 3 shown. It consists of a three-phase main circuit 1 and its control circuit installed on the drive motor of the pumping unit. A circuit breaker 2, a circuit breaker 2 3, a power filter 4, an AC reactor 5 and an AC servo controller 6 are sequentially connected in series on the main circuit. A position sensor 7 is also connected between the AC servo controller 6 and the drive motor 8 . The position sensor 7 is located on the shaft of the drive motor 8 . The control circuit consists of a transfer switch 9 connected to the two phases between the circuit breaker 1 2 and the circuit breaker 2 3 of the three-phase main circuit 1, a control transformer 10 connected to the transfer switch 9, and a secondary circuit connected to the control transformer 10. The control computer 11 on the winding and the AC servo controller 6 is formed.

[0016] Embodiment 1 is a mode in which ...

Embodiment 2

[0017] Embodiment 2. A kind of intelligent driving device of oilfield pumping unit, refer to Figure 1 ~ Figure 4 . The two ends of the AC servo controller 6 on the main circuit 1 are respectively connected to a normally open contact group 13 of an AC contactor 12, and the transfer switch 9 is also connected to a control computer 11 for switching on the AC contactor. One 12 or the switching device 14 of the coil of the AC contactor two 16, between the AC reactor 5 on the main circuit 1 and the normally open contact group 13 of the AC contactor one 12 and between the driving motor 8 is also connected with a soft The start controller 15 and the two ends of the soft start controller 15 are respectively connected to a normally open contact group 17 of an AC contactor 2 16 .

[0018] The soft start controller 15 is connected to the rotational speed regulator 23 controlled by the bidirectional thyristor voltage regulator 20 connected on the main circuit 1 and the position signal 22...

Embodiment 3

[0020] Embodiment 3. A kind of intelligent driving device of oilfield pumping unit, refer to image 3 . Its three-phase main circuit 1 is also connected with a normally open contact group 19 of an AC contactor three 18 between the circuit breaker one 2 and the circuit breaker two 3 and between the drive motor 8, and the said transfer switch 9 is connected A switching device 14 that can be controlled by the control computer 11 is used to switch the coils of AC contactor one 12, AC contactor two 16 or AC contactor three 18. Switching device 14 also has manual switch.

[0021] Embodiment 3 is a mode in which the motor is directly driven by the power frequency power supply of the power grid. That is to say, under special circumstances, if the control computer or the servo system fails, or the state of the oil well itself is abnormal, the system can automatically switch to the power frequency power supply of the power grid, and the main circuit 1 is normally open through the circ...

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PUM

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Abstract

The intelligent driving device for oil field beam pumping unit is formed from three-phase main circuit and its control circuit. On the main circuit, the circuit-breaker A, circuit-breaker B, power supply filter, A.C. reactor and A.C. servo controller are serially connected, the position sensor is positioned on the motor shaft, and the controller circuit is formed from changeover switch, control transformer and control computer. Two ends of A.C. servo cotnroller are respectively connected with one normally open contact group of A.C. contactor A, and a reversing service is connected on the changeover switch. The said main circuit also can be parallel-connected with soft-starting controller, its two ends are respectively connected with one normally open contact group of A.C. contactor B; also can be parallel-connected with normally open contact group of A.C. contractor C. The changeover switch also is connected with reversing service of coil of A.C. contactor A, B and C. It can use three kinds of circuit to drive the motor of beam pumping unit, its power factor is high, well yield is high, and the service life of beam pumping unit is long.

Description

technical field [0001] The invention relates to the technical field of mechanical and electrical devices for oil production, more specifically, it is a real-time logical control of the work of the pumping unit according to the set program, or the network control of the pumping unit for oil field pumping The intelligent driving device of the machine. Background technique [0002] As we all know, the geological conditions of oil reservoirs are very complicated, and the fluid filling conditions of oil wells are also constantly changing due to the influence of various factors. Therefore, the working speed of the pumping unit should be able to make corresponding changes anytime and anywhere. Also adjust its position accordingly. However, most of the current driving devices widely used in oil wells use power frequency power to directly drive the motor. The working speed of the pumping unit is fixed and cannot be changed accordingly with the geological ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/12
Inventor 戈璜
Owner 戈璜
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