Method for preventing eccentric wearing of sucker rod and tube

A technology for oil well rods and oil wells, applied in the direction of drill pipes, drill pipes, casings, etc., which can solve problems such as eccentric wear of rods and tubes, and achieve the effect of overcoming eccentric wear and prolonging the pump inspection period

Active Publication Date: 2015-11-18
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that there is no effective method in the prior art to prevent eccentric wear of rods and tubes in various situations, the embodiment of the present invention provides a method for preventing eccentric wear of oil well rods and tubes

Method used

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  • Method for preventing eccentric wearing of sucker rod and tube
  • Method for preventing eccentric wearing of sucker rod and tube
  • Method for preventing eccentric wearing of sucker rod and tube

Examples

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Embodiment 1

[0050] The embodiment of the present invention provides a method for preventing eccentric wear of oil well rod and tube, see figure 1 , The method includes:

[0051] Step 101: Determine the full angle change rate of each well section of the construction oil well.

[0052] Step 102: According to the full-angle change rate of each well section, determine the well sections and the number of sucker rod centralizers and sucker rod guides.

[0053] Step 103: Run the pump barrel, tubing and tubing hanger into the construction oil well.

[0054] Step 104: Run the sucker pump plunger, sucker rod, sucker rod centralizer, and sucker rod guide in the tubing of the determined well section, and run the sucker pump plunger and sucker rod in the tubing of other well sections. Oil stick.

[0055] In this embodiment, other well sections are well sections other than the determined well section among the well sections of the construction oil well.

[0056] The embodiment of the present invention determines...

Embodiment 2

[0058] The embodiment of the present invention provides a method for preventing eccentric wear of oil well rod and tube, see figure 2 , The method includes:

[0059] Step 201: Determine the full angle change rate of each well section of the construction oil well.

[0060] Optionally, the length of each well section can be 25m.

[0061] In an implementation manner of this embodiment, step 201 may include:

[0062] Obtain the full-angle change rate of each section of the construction oil well from the deviation data table with the recorded full-angle change rate.

[0063] In practical applications, the inclination data table of the geological database records the full-angle change rate of the wellbore per 25m depth, and the full-angle change rate of each section of the construction oil well can be directly obtained from it.

[0064] In another implementation manner of this embodiment, step 201 may include:

[0065] According to the following formulas (1), (2), calculate the full-angle cha...

Embodiment 3

[0098] The embodiment of the present invention provides a method for preventing eccentric wear of oil well rod and tube. In this embodiment, the TXW09 well is taken as an example, and the following steps are performed:

[0099] 1. Admission the full-angle change rate of TXW09 well.

[0100] In the geological database TXW09 well inclination data table, the full angle change rate of the oil well bore per 25m depth is recorded.

[0101] 2. Determine the position and number of sucker rod centralizers and sucker rod guides according to the full-angle change rate.

[0102] The well section of TXW09 with a full-angle change rate greater than 3 is 1225m~1975m, and the length is 750m. In this section, a sucker rod guide and a centralizer need to be run. The lower position is: sucker rod + sucker rod centralizer + sucker oil guide + sucker oil guide + sucker rod centralizer + sucker rod. The formula for calculating the number of downloads is:

[0103] N = L 2 ( h 1 + h ...

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Abstract

The invention discloses a method for preventing eccentric wearing of a sucker rod and tube, and belongs to the field of oil industry oil production engineering. The method comprises the following steps of: determining the overall angle change rate of each well section of a construction oil well; determining the well sections provided with sucker rod centralizers and sucker rod guide devices and the number of the sucker rod centralizers and the sucker rod guide devices according to the overall angle change rate of each well section; feeding a pump tube of an oil sucking pump, an oil tube and a sucker tube suspender into the construction oil well; feeding an oil sucking pump plunger piston, the sucker rod, the sucker rod centralizers and the sucker rod guide devices into an sucker tube of the determined well section; and feeding the oil sucking pump plunger piston and the sucker rod into the sucker tube of other well sections, wherein the other well sections refer to well sections beyond the determined well section in each well section of the construction oil well. The method has the advantage that after the application to sites of more than 30 oil wells, the single-well average pump checking period of the oil well is prolonged by 307 days.

Description

Technical field [0001] The invention relates to the field of oil extraction engineering in the petroleum industry, in particular to a method for preventing eccentric wear of oil well rods and tubes. Background technique [0002] The sucker rod reciprocates in the tubing, and friction occurs between the sucker rod and the inner wall of the tubing, commonly known as eccentric wear. [0003] With the deepening of oilfield development, the phenomenon of eccentric wear between tubing and sucker rods has become increasingly serious. Well deviation, string structure, rod and tube combination, and unreasonable working system may all be the causes of rod and tube eccentric wear. At the same time, the material of rod and tube and the nature of the produced liquid may also affect rod and tube eccentric wear. [0004] At present, there is no effective method to prevent eccentric wear of rod and tube in various situations. Summary of the invention [0005] In order to solve the problem that the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/10
Inventor 付亚荣严建奇马永忠刘春平李小永王爱芳张志明李芸靳利姜一超姚庆童李冬青付丽霞付茜曹瑾
Owner PETROCHINA CO LTD
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