Treatment method for fatigue test sample clamping part of hollow sucker rod

A technology of hollow sucker rod and fatigue test, which is applied in the field of laboratory testing, can solve the problems of easy fracture and inability to carry out fatigue test continuously, and achieve the effect of reducing the impact

Inactive Publication Date: 2020-08-14
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the problem that the clamping part of the hollow sucker rod is particularly easy to break due to the clamping force during the fatigue test and cannot continue the fatigue test, the present invention adopts the following technical solutions:

Method used

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  • Treatment method for fatigue test sample clamping part of hollow sucker rod
  • Treatment method for fatigue test sample clamping part of hollow sucker rod
  • Treatment method for fatigue test sample clamping part of hollow sucker rod

Examples

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Embodiment Construction

[0024] Below by specific embodiment and in conjunction with accompanying drawing, invention is described in further detail;

[0025] The sampling length of the hollow sucker rod is 700mm, the outer diameter of the rod body is 36.00mm, and the wall thickness is 6mm±0.25mm. One end is filled with a filling rod with a diameter of 22mm and the same material as the hollow sucker rod;

[0026] SDS300kN electro-hydraulic servo fatigue testing machine is used for fatigue performance test, the sample is clamped by clamp block, the length of the clamping part is 66mm, and the length of the filling rod is 99mm;

[0027] The gap between the filling rod and the hollow sucker rod is required to be 1mm to 2mm, and the gap between the filler rod and the hollow sucker rod in this example is calculated to be 1mm; this example uses high-strength epoxy resin glue to fill the gap, and the epoxy resin glue is cured The final Shore hardness is 90D.

[0028] Specific steps are as follows:

[0029]...

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Abstract

The invention relates to a treatment method for a fatigue test sample clamping part of a hollow sucker rod. The treatment method is characterized in that the method is used for a hollow sucker rod fatigue test sample, the inside of a hollow rod body of a clamping part is filled with a filling rod with a certain length, a gap is reserved between the filling rod and the inner wall of the hollow sucker rod, and the gap is filled with epoxy resin glue. According to the invention, a problem that the fatigue test cannot be continuously carried out because the clamping part of the hollow sucker rod is particularly easy to break due to the clamping force during the fatigue test is solved.

Description

technical field [0001] The invention relates to a method for processing the clamping part of a hollow sucker rod fatigue test sample, which belongs to the technical field of laboratory testing. Background technique [0002] Hollow sucker rod is a hollow sucker rod used in mechanical oil recovery wells. The hollow sucker rod can be used for power transmission, and its hollow channel can be used as a fluid channel or as a cable channel. As a sucker rod, the mechanical properties of the hollow sucker rod are required to comply with the sucker rod standard, among which the fatigue performance is one of the important mechanical properties, which can evaluate the basic service life of the hollow sucker rod Provide reference for improvement of material and processing technology. [0003] The length of the hollow sucker rod is about 8m-10m. For the sampling of the fatigue test, a section of 0.6-0.8m can be cut from the hollow sucker rod. The rod head is threaded and connected by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/04G01M13/00
CPCG01N3/04G01M13/00
Inventor 王海文朱宁刘长江步凌飞
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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