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Fiber reinforced thermoplastic plastic composite tube failure analysis method

A thermoplastic and fiber-reinforced technology, applied in the field of failure analysis of fiber-reinforced thermoplastic composite pipes, can solve problems such as unsystematic and blind failure analysis of non-metallic composite pipes, and achieve the effect of easy implementation, easy reference and use, and easy implementation.

Inactive Publication Date: 2018-02-13
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the existing technology, the present invention provides a failure analysis method for fiber-reinforced thermoplastic composite pipes by simulating the failure causes that may occur in the actual production, transportation, installation, construction, service, etc. Blind and unsystematic problems in failure analysis

Method used

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  • Fiber reinforced thermoplastic plastic composite tube failure analysis method
  • Fiber reinforced thermoplastic plastic composite tube failure analysis method

Examples

Experimental program
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Effect test

example 1

[0047] Example 1: Judging the cause of failure of polyester fiber reinforced polyethylene composite pipes in service in an oil field at room temperature

[0048] (1) Select the pipe material and preparation work required for the test. Randomly select 4 pipes from the same batch as the field service, and 1 pipe is a group, numbered 1#, 2#, 3#, 4# respectively. (2) Simulate the failure mode. Pipes 2#, 3#, and 4# were prefabricated in three failure modes: artificially scratched protective layer, a small amount of fiber fracture, and a large number of fiber fractures, respectively, using tools. (3) Short-term hydraulic failure test. According to the standard GB / T15560-1995, the blasting test was carried out on the prefabricated failure mode pipes 2#, 3#, 4# and the non-prefabricated failure mode pipe 1#, and the short-term hydraulic failure strength was tested to obtain the value, 1#, 2 #, 3#, 4# composite pipe short-term hydraulic pressure failure strength values ​​were 30MPa,...

example 2

[0050] Example 2: Judging the cause of failure of polyester fiber reinforced polyethylene composite pipes in high temperature environment (45°C) in an oil field

[0051](1) Select the pipe material and preparation work required for the test. Randomly select 4 pipes from the same batch as the field service, and 1 pipe is a group, numbered 1#, 2#, 3#, 4# respectively. (2) Carry out the test of simulated temperature. Select 0°C, 25°C, 45°C and 65°C temperature points for insulation. The distribution of temperature points includes extreme temperature points of 0°C, 65°C and service temperature of 45°C. (3) Short-term hydraulic failure test. According to the standard GB / T15560-1995, the blasting test is carried out on the pipes 1#, 2#, 3# and 4# of the prefabricated failure mode, and the short-term hydraulic failure strength is tested, and the value is obtained. 1#, 2#, 3#, The short-term hydraulic failure strength values ​​of 4# composite pipes are 29MPa, 26MPa, 21MPa and 17MP...

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Abstract

The invention discloses a fiber reinforced thermoplastic plastic composite tube failure analysis method. By simulating possible failure reasons in the process such as actual production, transportation, mounting construction, service and the like, a failure mode of a fiber reinforced thermoplastic plastic composite tube is judged, and according to failure morphology and related explosion data of the fiber reinforced thermoplastic plastic composite tube in short-time water pressure failure testing with damage of different degrees, and performance of the fiber reinforced thermoplastic plastic composite tube under a service environment condition, the failure reasons of the composite tube are judged. The prediction method disclosed by the invention is simple and convenient to implement, the failure reasons of the fiber reinforced thermoplastic plastic composite tube can be rapidly and accurately judged, accident reasons of oil-gas fields can be judged and treated, and similar failure situations can be prevented.

Description

technical field [0001] The invention relates to the technical field of failure analysis of pipes in the petroleum and natural gas industry, in particular to a method for failure analysis of fiber-reinforced thermoplastic composite pipes. Background technique [0002] Fiber-reinforced thermoplastic composite pipe has good flexibility, light weight, corrosion resistance, anti-fouling, small resistance to conveying fluid, quick and easy construction, and is made of continuous dynamic composite, which can meet the length of the project and is supplied in coiled form. The advantages of convenient transportation and no joints in the middle have been used in various domestic oilfield gathering and transportation pipelines, alcohol injection pipelines, sewage reinjection pipelines, etc., with a length of more than tens of thousands of kilometers, and the number is still growing. [0003] With the large-scale and wide application of fiber reinforced thermoplastic composite pipes, dif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/02G01N3/307
CPCG01N3/02G01N3/307
Inventor 蔡雪华戚东涛丁楠齐国权
Owner BC P INC CHINA NAT PETROLEUM CORP
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