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Method for measuring throughput capacity of submersible electric pump

A technology of submersible electric pump and measurement method, which is applied in the direction of pump testing, liquid displacement machinery, machine/engine, etc., which can solve the problems of low reliability of measurement results and rough measurement results, and achieve the effect of avoiding damage

Inactive Publication Date: 2012-09-12
李健忠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The measurement results of this method are relatively rough and can only be used as a reference, and in the geometric calculation formulas currently used, some formulas have unit problems, so the reliability of the measurement results is relatively low

Method used

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  • Method for measuring throughput capacity of submersible electric pump
  • Method for measuring throughput capacity of submersible electric pump

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: a kind of submersible electric pump passability measuring method is characterized in that it is made of following steps:

[0020] (1) The inner diameter d1 of the measuring casing is 0.224m;

[0021] (2) Measure the arc length L1 of the build-up section of the oil well to be 30m and the bending curvature α1 of the casing in the build-up section to be 12°;

[0022] (3) To measure the maximum outer diameter d2 of the submersible electric pump is 0.147m and the length L2 is 20m;

[0023] (4) According to the test, the maximum bending curvature α2 of the submersible electric pump unit is 3°, if it is greater than 3°, the electric pump will be damaged;

[0024] (5) According to the measurement and analysis of the accompanying drawings, the geometric relationship can be known: X1 2 +Y1 2 =(R1+d1 / 2) 2 ;X2 2 +Y2 2 =(R2+d2 / 2) 2 ;R2=L2 / α2*R; Z=(R2+d2 / 2)-X2;

[0025] a) α1=12°=12 / 180×π=0.2094395102 radians;

[0026] b) R1=L1 / α1=30 / 0.2094395102=143.2394488m; ...

Embodiment 2

[0037] Embodiment 2: a kind of submersible electric pump passability measuring method is characterized in that it is made of the following steps:

[0038] (1) The inner diameter d1 of the measuring casing is 0.224m;

[0039] (2) Measure the arc length L1 of the build-up section of the oil well to be 30m and the bending curvature α1 of the casing in the build-up section to be 12°;

[0040] (3) To measure the maximum outer diameter d2 of the submersible electric pump is 0.147m and the length L2 is 10m;

[0041] (4) According to the test, the maximum bending curvature α2 of the submersible electric pump unit is 3°, if it is greater than 3°, the electric pump will be damaged;

[0042] (5) According to the measurement and analysis of the accompanying drawings, the geometric relationship can be known: X1 2 +Y1 2 =(R1+d1 / 2) 2 ;X2 2 +Y2 2 =(R2+d2 / 2) 2 ;R2=L2 / α2*R; Z=(R2+d2 / 2)-X2;

[0043] a) α1=12°=12 / 180×π=0.2094395102 radians;

[0044] b) R1=L1 / α1=30 / 0.2094395102=143.239448...

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Abstract

A method for measuring throughput capacity of a submersible electric pump includes measuring the inner diameter d1 of a sleeve; measuring the arc length L1 of a deflecting section and the bending curvature alpha 1 of the sleeve on the deflecting section; measuring the maximum outer diameter d2 and the length L2 of the submersible electric pump to be measured; determining that the electric pump is about to be damaged if the maximum bending curvature alpha 2, which is known to be 3 degrees from experience, of a submersible electric pump unit is larger than 3 degrees; computing Y1 and Y2 according to geometrical relationship; and determining that the submersible electric pump can get through when the Y1 is larger than or equal to the Y2; and determining that the submersible electric pump cannot get through when the Y1 is smaller than the Y2. The method has the advantages that whether the submersible electric pump can get through a bent section in a bent oil well or not can be measured, the problem that the submersible electric pump is jammed in the bent section during actual operation so that the requirement on pump setting depth cannot be met is avoided, and damage to the electric pump and damage to the oil well during operation are also avoided.

Description

(1) Technical field: [0001] The invention relates to a method suitable for measuring the passability of a submersible electric pump in an oil well. (two) background technology: [0002] There is currently no complete and reliable measurement method for the measurement of the passability of electric submersible pumps in the kickoff section of oil wells. The usual practice now is to abstract the electric pump into a slender rod-shaped body, and then judge its passability through simple geometric calculations. The measurement results of this method are relatively rough and can only be used as a reference, and some of the currently used geometric calculation formulas have unit problems, so the reliability of the measurement results is relatively low. The passability measurement of the submersible electric pump has an impact on the future pumping depth of the submersible electric pump, so its measurement accuracy is very important. (3) Contents of the invention: [0003] The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B51/00
Inventor 李健忠
Owner 李健忠
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