Frequency conversion control method and device for oil-well pump combining indicator diagram with working fluid level
A frequency conversion control and dynamometer technology, which is used in pump control, liquid variable capacity machinery, machines/engines, etc., can solve the problems of unsatisfactory energy saving effect and single input of frequency conversion control, achieve significant energy saving effect and overcome measurement errors. and misadjustment, the effect of high measurement accuracy
Active Publication Date: 2016-04-06
贵州航天凯山石油仪器有限公司
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[0003] The object of the present invention is to provide a method and device for frequency conversion control of oil well pumps that combine the indicator diagram and the dynamic liquid surfa...
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[0020] The schematic diagram of the device structure in this example is as follows figure 1 As shown, it is composed of indicator diagram acquisition unit, liquid level monitor, RTU or intelligent monitoring equipment, frequency converter, control panel, logic control unit, display module, wireless module and power module and other parts.
[0021] The dynamometer acquisition unit is composed of a load sensor and an angular displacement sensor. The load sensor is installed at the donkey head rope hanger to convert the pressure value into an analog value. The angular displacement sensor is installed at the beam bracket of the oil well pump to capture the angle of the beam during the up and down movement of the donkey's head, and convert the angle value into an analog value. The liquid level monitor is installed on the casing of the oil well pump, and is fired by inflating or deflating the gas cylinder to capture the downhole knot wave and liquid level wave, and obtain the o...
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The invention discloses a frequency conversion control method and device for an oil-well pump combining an indicator diagram with a working fluid level. Data of an indicator diagram acquisition unit and data of a liquid level monitor are input into a remote terminal unit (RTU) or intelligent monitoring equipment simultaneously, the authenticity of pump efficiency data of the current system is judged according to the pump fullness calculated in accordance with the indicator diagram by the RTU or the intelligent monitoring equipment and the oil-well pump submergence obtained through the liquid level monitor in a combination mode, the authentic pump efficiency data are effectively input for frequency conversion adjustment, and thus the frequency output result of a frequency converter is determined so that a measurement error caused by a single detection parameter can be overcome, and the best energy saving effect of the oil-well pump system is ensured. According to the frequency conversion control method and device for the oil-well pump combining the indicator diagram with the working fluid level, the indicator diagram and the working fluid level are combined to serve as the input basis of frequency conversion control, so that the measurement error and error adjustment caused by the single detection parameter are effectively overcome; the structure is simple, and frequency conversion adjusting functions in different modes of manual adjustment, automatic adjustment, remote adjustment and the like can be achieved; the frequency conversion control method and device are suitable for the frequency conversion energy-saving control system of a beam oil-well pump.
Description
technical field [0001] The invention relates to a frequency conversion control method and device for an oil well pump combining an indicator diagram and a dynamic fluid surface, and belongs to the technical field of oil field digital detection and control. Background technique [0002] With the development of energy-saving technology, the frequency conversion energy-saving technology of oil well pumps has been widely used. However, due to the complexity of oil well conditions and the limitation of downhole conditions, the frequency conversion control method is still limited to manual or single parameter detection control methods. A satisfactory energy-saving effect can be achieved. Commonly used frequency conversion control methods include calculating the fullness of the downhole pump from the surface dynamometer diagram, automatically adjusting the frequency conversion output according to the pump fullness, and controlling the frequency conversion output through the electri...
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Inventor 赵善国周胜根王先鹏谢雪峰
Owner 贵州航天凯山石油仪器有限公司
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