Oil pumping with lever system ground facilities efficiency evaluate method

A technology of ground equipment and evaluation method, which is applied to mechanical equipment, earth-moving drilling, pumps with flexible working elements, etc., can solve the problem that the working condition of the four-bar linkage mechanism of the ground drive motor cannot be accurately determined, and the operation of the ground electromechanical system cannot be judged. situation, etc.

Active Publication Date: 2008-03-05
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Overcoming the existing research on the efficiency of the rod pumping system does not involve the working conditions of the ground electromechanical system, and cannot judge the working conditions of the ground elect

Method used

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  • Oil pumping with lever system ground facilities efficiency evaluate method
  • Oil pumping with lever system ground facilities efficiency evaluate method
  • Oil pumping with lever system ground facilities efficiency evaluate method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0074] A. Draw a diagram of the working conditions of the surface electromechanical system of the rod pumping well, see Figure 1.

[0075] Taking the motor load rate ξ as the abscissa variable, the ground efficiency η of the pumping unit system up Draws a Cartesian plane plot for the ordinate variable. Follow these steps on a rectangular coordinate plan:

[0076] (1) Draw motor efficiency η mt - Load rate ξ characteristic curve is the upper boundary line;

[0077] (2) Draw the lower boundary line 0.77cη mt , c=0.7;

[0078] (3) Draw the abscissa ξ=ξ 0 The vertical line of ξ 0 =0.11;

[0079] (4) Through the intersection point of the vertical line and the upper boundary line, draw a horizontal line to intersect the ordinate axis.

[0080] After the above drawing, the ground mechanical and electrical system working condition map of the rod pumping well is divided into 4 areas: above the upper boundary line is the surface mechanical and electrical system test parameter ar...

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Abstract

The method comprises: a) drawing a operating condition graph, and dividing the operating condition graph into four areas which are an area of test parameter under investigation, an area of normal working, an area of low mechanical efficiency, and an area of motor low load and load efficiency; b) determining the location of individual well in the graph: testing the motor running parameter, pumping unit well suspension parameter, and using diagram of work fluidounce metering to fast measure the fluidounce yield; calculating the motor input and output power, motor load rate, pumping unit polished rod power and pumping unit system ground efficiency; filling the obtained motor load rate, pumping unit system ground efficiency data into the ground electromechanical system operating condition graph.

Description

technical field [0001] The invention relates to the technical field of rod pumping in oil fields, in particular to an efficiency analysis and evaluation method for ground equipment of a rod pumping system. Background technique [0002] Rod pumping system consists of surface electromechanical system and downhole system. The surface electromechanical system includes the driving motor, transmission mechanism and four-bar linkage mechanism of the pumping unit; the downhole system includes the sucker rod, oil pipe and pump, and the oil reservoir. Timely evaluation and optimization of the working conditions of the pumping wells is of great significance for improving the efficiency of the rod pumping system, prolonging the service life of the equipment, and improving the economic benefits of oil recovery. Therefore, the research on the evaluation of the working condition of the rod pumping system has always been valued by the relevant engineers and managers. [0003] In the late ...

Claims

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Application Information

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IPC IPC(8): G05B23/02E21B43/00F04B47/02
Inventor 黄伟饶建华刘宏昭王守虎姚斌吕亿明陈伟
Owner PETROCHINA CO LTD
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