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Frequency conversion and energy saving monitoring system for water source well of oil field

A monitoring system and water source well technology, applied in pump control, liquid variable capacity machinery, machine/engine, etc., can solve the problems of electric energy waste, electric submersible pump idling can not automatically cut off the power, etc., to increase the load capacity, reliable Energy-saving monitoring equipment, remarkable energy-saving effect

Inactive Publication Date: 2014-10-08
CNPC SICHUAN GASOLINEEUM GEOPHYSICAL PROSPECTING ENG TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems in the prior art that the electric submersible pump in the oilfield water source well does not take energy-saving measures, resulting in serious waste of electric energy and the problem that the electric submersible pump cannot automatically cut off the power when the water is drained.

Method used

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  • Frequency conversion and energy saving monitoring system for water source well of oil field
  • Frequency conversion and energy saving monitoring system for water source well of oil field
  • Frequency conversion and energy saving monitoring system for water source well of oil field

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Effect test

Embodiment 1

[0024] In order to make the water supply system of the water source well run stably, the water supply system must satisfy both the head characteristic and the pipe resistance characteristic. The head characteristic is based on the premise that the opening of the valve in the system pipeline is constant, which shows the relationship curve between the head H and the flow Q of the electric submersible pump at a certain speed. What the head characteristic reflects is the relationship H=f(Q) between the head H and the water flow Q.

[0025] The pipe resistance characteristic is based on the premise that the speed of the electric submersible pump is constant, indicating the relationship between the head H and the flow Q of the valve at a certain opening. The pipe resistance characteristics reflect the change law of the energy of the electric submersible pump used to overcome the water level and pressure difference of the electric submersible pump system, and the flow resistance of w...

Embodiment 2

[0039] The frequency converter 3 that the present invention adopts is ABB frequency converter, ACS510 series, rated capacity is 55~90KW, as Figure 4 As shown, the PLC-based frequency conversion energy saving device ACS510 frequency converter control diagram: Terminals 5 and 6 are connected to M and I terminals of PLC to receive the analog signal of PLC controlling the output frequency of the frequency converter, and terminals 7 and 9 are connected to E+ and E of PLC - terminal, to send the frequency signal of the frequency converter, terminal 13 is connected to terminal 10 via the frequency conversion start KM2 button, terminals 10 and 13 are the start signals of the frequency converter; terminals 14 and 15 are connected to high-speed / low-speed switch SA2, 10 and 14 Terminal No. 1 is the high-speed selection function of the inverter, terminals 10 and 15 are the low-speed selection function of the inverter, and the high-speed and low-speed selection functions of the inverter ar...

Embodiment 3

[0046] The main control equipment for realizing constant voltage control in the frequency conversion energy-saving device is PLC. This system adopts Siemens S7-200 series PLC, which has a standard RS485 communication port and 1 Ethernet (Ethernet), RJ45 network port. It is small in size and easy to execute. Fast speed, strong anti-interference ability and superior performance. PLC is mainly used to realize the automatic control of frequency conversion energy-saving devices. It must complete the following functions: automatically control the operation of the electric submersible pump; have a soft start function when starting; have manual / automatic control functions for the operation of the electric submersible pump, manual Temporary use in emergency or maintenance; the system has a complete alarm function and can display the operating status. The rationality of the circuit and the reliability of the program are directly related to the operation performance of the whole system. ...

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Abstract

The invention belongs to the technical field of energy saving monitoring electric equipment and particularly provides a frequency conversion and energy saving monitoring system for a water source well of an oil field. The frequency conversion and energy saving monitoring system comprises an electric submersible pump, an asynchronous motor driving the electric submersible pump and a water outlet pipeline connected with the electric submersible pump. A pressure transmitter is arranged on the water outlet pipeline at a wellhead, measures pressure of outlet water, and converts the pressure of outlet water into a 4mA-20mA electric signal. The pressure transmitter is electrically connected with an I / O module of a PLC, and the I / O module of the PLC is electrically connected with an operation panel of a frequency converter to control the frequency converter connected with and controlling the asynchronous motor. The frequency conversion and energy saving monitoring system has the advantages that energy saving effect is obvious, loss of a power supply circuit is reduced, load capacity of the pressure transmitter is improved, and mechanical shock loss of the electric submersible pump and the asynchronous motor is reduced. Accordingly, the reliable energy saving monitoring device is provided for normal production of the oil field.

Description

technical field [0001] The invention belongs to the technical field of energy-saving monitoring electrical equipment, and in particular relates to a frequency conversion energy-saving monitoring system for water source wells used in oil fields. Background technique [0002] At present, the main problems of known oilfield water source wells are: [0003] The electric submersible pump model of the existing water source well is 130ZTQ20-400 ~ 700, the asynchronous motor of the electric submersible pump is YQS200-45 to YQS200-75, the minimum asynchronous motor power is 45KW, and the maximum asynchronous motor is 75KW. 35 mm 2 ~50mm 2 Waterproof cables, ground control cabinets are started by self-duplex step-down, and the power of the control cabinets is 55-75KW. Due to the large pump capacity and small pipeline design specifications of most water source wells, the defect that the pump capacity does not match the pipeline design specifications is caused. The actual load of the...

Claims

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Application Information

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IPC IPC(8): F04B49/06
Inventor 高宝元
Owner CNPC SICHUAN GASOLINEEUM GEOPHYSICAL PROSPECTING ENG TECH RES INST
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