Adjustment method for operation balance of rod-pumped well

A technology for pumping wells and adjustment methods, which is applied in earthwork drilling, wellbore/well components, production fluids, etc., and can solve problems such as difficulty in providing crank balance weight and corresponding radius data, large test errors, and difficult testing, etc. question

Active Publication Date: 2015-04-22
哈尔滨斯特凯峰电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The current method is mostly used on site, and the maximum current on the upstroke and downstroke is measured as a balance adjustment judgment, but the test error is relatively large; the power method is more accurate in practical applications, and the

Method used

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  • Adjustment method for operation balance of rod-pumped well
  • Adjustment method for operation balance of rod-pumped well
  • Adjustment method for operation balance of rod-pumped well

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Experimental program
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specific Embodiment approach 1

[0104] Specific embodiment one: the process of the adjustment method of a kind of pumping well operation balance described in the present embodiment is:

[0105] Step 1. During the normal working process of the pumping unit, collect the electrical parameters of the pumping well in real time at high speed. The data collection speed is greater than or equal to 20 times per second. Simultaneously measure the electrical parameters of the motor input terminal: current, voltage, active power, and determine the pumping unit. The moment when the crank of the pumping unit runs to the upper dead point of the suspension point of the wellhead of the pumping unit and the moment to the lower dead point;

[0106] Pumping unit stroke: the crank balance weight of the pumping unit runs to the bottom dead center of the corresponding pumping unit wellhead (the crank operating angle is 0° or 360°), and the crank balance weight of the pumping unit runs to the top dead center of the corresponding pum...

specific Embodiment approach 2

[0115] This embodiment will describe the first specific embodiment in detail. Give an example to illustrate the net torque superposition value P of the up and down strokes for multiple consecutive strokes 上下 The calculation process, assuming that it is required to obtain the net torque superposition value P of up and down strokes for m consecutive strokes 上下 and the torque factor of m strokes

[0116] The net torque data collected on the upstroke of the first stroke is X 1 、X 2 、X 3 ,...X n , then the average value P of all net torques in the upstroke in this stroke 1上 For: (X 1 +X 2 +X 3 +…+X n ) / n;

[0117] The torque factor calculated corresponding to the upstroke of the first stroke and data acquisition is Z 1 ,Z 2 ,Z 3 ,……Z n , then the average value of all torque factors in the upstroke in this stroke For: (Z 1 +Z 2 +Z 3 +…+Z n ) / n;

[0118] The net torque data collected on the downstroke of the first stroke is Y 1 , Y 2 , Y 3 、…Y n , then the ...

specific Embodiment approach 3

[0175] This embodiment describes in detail the adjustment method of the operation balance of the pumping well described in the specific embodiment one or two:

[0176] To make the pumping unit run in balance, the motor should do positive work and equal work in both the up and down strokes, that is, the principle of balance. The simple method is to add a heavy object on the back beam of the pumping unit, and let the self-weight of the sucker rod and the motor work together on the heavy object during the downstroke: A w ——the work done by the self-weight of the sucker rod and the electric motor on the heavy object during the down stroke;

[0177] A d ——the work done by the sucker rod string to the heavy object, that is, the work done by the suspension point in the downstroke;

[0178] A md - the work done by the motor on the weight during the downstroke, that is, the work done by the motor during the downstroke;

[0179] A w =A d +A md

[0180] It can be obtained from th...

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Abstract

The invention relates to an adjustment method for operation balance of a rod-pumped well and belongs to the technical field of oil production of oil fields. The adjustment method aims at achieving convenient and practical measurement of balance adjustment of the rod-pumped well on site. The adjustment method is characterized in that an active power average value and an upstroke and downstroke net torque superposition value P<up and down> are obtained; an annulus working fluid level HY is obtained according to P<up and down>; according to an upstroke active power average value <up> and a downstroke active power average value <down>, whether balance blocks need to be moved and adjusted and whether the moving directions of the balance blocks need to be adjusted are judged; if adjustment is needed, the adjustment moving amount of the balance blocks of a pumping unit is determined, and the balance blocks of the pumping unit are adjusted. By the adoption of the power method, the relation is established between the adjustment amount of the balance blocks and the variation of a working fluid level HY actually measured when balance adjustment is needed and a working fluid level HY<before> obtained when balance adjustment is not needed, stored work condition information is perfected according to the model as for the same rod-pumped well, the stored information can be freely called during testing, actually measured data are used for correcting working condition parameters, and the method used for conducting practical measurement of balance adjustment of the rod-pumped well and conducting adjustment on site after measurement is achieved.

Description

technical field [0001] The invention relates to a method for adjusting the operation balance of a pumping well, relates to the technical field of pumping well measurement in an oil field, and belongs to the technical field of oil production in an oil field. Background technique [0002] If the pumping unit does not have a balance device, when the motor drives the pumping unit to run, due to the extremely unbalanced load at the suspension point during the up and down strokes, the motor that meets the load on the up stroke will do negative work in the down stroke, resulting in the failure of the pumping unit. The force is extremely unbalanced during the up and down strokes. The consequences are: seriously reduce the efficiency and life of the motor; cause the pumping unit to vibrate violently; destroy the uniformity of the crank rotation speed and deteriorate the working conditions of the sucker rod and the pump. Therefore, the pumping unit must adopt a balance device. [00...

Claims

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Application Information

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IPC IPC(8): E21B43/00
CPCE21B43/121
Inventor 金凯金奇峰邹文江刘春荣尹志国李德荣王伟
Owner 哈尔滨斯特凯峰电子有限公司
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