Method for performing expansion test of combined loads on solid expansion pipe

A technology of expansion test and composite load, which is applied in the direction of applying stable tension/pressure to test the strength of materials, etc., which can solve the unfavorable quality control of physical expansion tubes, the lack of expansion performance test evaluation, and the inability to ensure the safety and reliability of expansion tubes, etc. problems, to achieve the effect of avoiding instability in the lateral direction

Inactive Publication Date: 2011-04-20
XIAN SANHUAN TECH DEV GENERAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The expansion tube products developed in China are only based on the requirements of the expansion process. After the tube body and the expansion tool are assembled, the relevant physical performance tests such as internal pressure and sealing performance are carried out on the ground, and there is no test and evaluation of the expansion performance of the physical expansion tube. This method cannot ensure the safety and reliability of the expandable pipe body in the underground service process, and is not conducive to the quality control of the physical expandable pipe product. This is also an important gap between domestic expandable pipe technology and similar foreign technologies.

Method used

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  • Method for performing expansion test of combined loads on solid expansion pipe
  • Method for performing expansion test of combined loads on solid expansion pipe
  • Method for performing expansion test of combined loads on solid expansion pipe

Examples

Experimental program
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Embodiment 1

[0021] 1), sample and expansion cone preparation. Prepare a J55 steel grade solid expansion tube 11Φ139.7mm×7.72mm×10000mm. After inspection, there is no surface defect. The cross-section at both ends of the sample 11 is perpendicular to the axis of the tube body. The outer diameter is 143 mm, the outer diameter of the expansion cone is the same as the inner diameter after expansion of the solid expansion tube 11 sample, and the expansion cone angle is 8 degrees. Calculate the expansion range of the expansion cone:

[0022] The expansion range of the expansion cone = (the outer diameter of the expansion cone - the inner diameter of the solid expansion tube sample) / the inner diameter of the solid expansion tube sample

[0023] The expansion cone expansion range is 15%.

[0024]2), the end swelling. Put the sample 11 through the pull rod 6 and put it into the expansion test device, control the three-grip chuck 10 and the positioning flange 16 to fix the expansion tube sample...

Embodiment 2

[0029] 1), sample and expansion cone preparation. Prepare two samples of L80 steel grade solid expansion pipe Φ177.8mm×9.19mm×5000mm, one of which has a direct-connection male thread and one with a direct-connection female thread, and the two sample threads are tightened to form a test Using expansion tube sample 11, no surface defects were found after inspection, and the outer diameter of the expansion cone was selected to be 180.3 mm, the expansion cone angle was 8 degrees, and the expansion range of the expansion cone was 13.1%.

[0030] 2), the end swelling. Open the protective cover 18, put the solid expansion tube sample 11 into the pull rod 6 and hang it into the right side of the expansion test device together, control the three-grip chuck 10 and the positioning flange 16 to fix the expansion tube sample, and ensure that the center of the sample is the same as the pull rod 6. The center of the piston rod 23 is coaxial, adjust the position of the middle beam so that th...

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Abstract

The invention relates to a method for performing an expansion test of combined loads on a solid expansion pipe, which comprises the following steps of: 1) preparing a sample and an expansion cone; 2) expanding an end part; 3) preparing an expansion test; 4) performing the expansion test, wherein the expansion test can be any one of the following tests: a, a mechanical stretching expansion test; b, a hydraulic expansion test; and c, a mechanical hydraulic combined expansion test; and 5) performing data acquisition and data analysis. In the method, the mechanical stretching expansion test or the hydraulic expansion test or the combined expansion test of mechanical stretching and hydraulic pressure is realized, and the displacement, speed, stretching loads and hydraulic pressure of the expansion cone and the radial deformation data of the solid expansion pipe in the process of the expansion test can be measured in real time by using axial controlled mechanical stretching loads and the hydraulic pressure and matching the corresponding expansion conical head. The invention provides a method for the expansion test for simulating actual working conditions in laboratories effectively for the detection of expansion performance and study evaluation of the solid expansion pipe and the study and improvement of a connecting structure of the expansion pipe.

Description

technical field [0001] The invention relates to the technical field of solid expansion tubes in the petroleum and natural gas industry, in particular to a test method for evaluating the expansion performance of the solid expansion tube as a whole. This method can be used for compound expansion performance test research, and can be used for the development of expansion pipes and supporting tools. Background technique [0002] Solid expandable casing SET (Solid Expandable Tubular) technology is a new drilling, completion and workover technology that expands the casing string radially to the required diameter in the wellbore for the purpose of "saving" the borehole size. technology. The application of this technology can increase the number of casing layers to be lowered, bringing "revolutionary" impact and significant technical and economic benefits to deep wells, drilling and wellbore structures with complex geological conditions. It can make the wellbore "thin" and signifi...

Claims

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Application Information

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IPC IPC(8): G01N3/10
Inventor 刘强上官丰收申昭熙冯耀荣林凯
Owner XIAN SANHUAN TECH DEV GENERAL
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