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Test method for interlaminar shear strength

A technology of interlayer shear strength and test method, which is applied in the direction of using a stable shear force to test the strength of materials, etc., can solve problems such as difficulty in distinguishing, interlayer shear strength does not meet the requirements, and completion construction fails. , to avoid test errors and avoid completion failures

Active Publication Date: 2017-10-17
CHINA PETROLEUM & CHEM CORP +2
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] At present, there is no test method for testing the axial interlaminar shear strength of wound composite pipes for making downhole tools, and according to the test method, it is judged whether the interlaminar shear strength of the wound composite pipes meets the requirements
In particular, pipes are affected by changes in processing parameters during the manufacturing process. For example, there are too many interlayer fiber bonding defects, resulting in interlayer shear strength that cannot meet the requirements. However, it is difficult to distinguish with the naked eye. If there is no test method for layer The misuse of such tubing due to testing for inter-interval shear strength can easily lead to failure of well completion construction

Method used

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  • Test method for interlaminar shear strength
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  • Test method for interlaminar shear strength

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0033] Such as figure 1 Shown is an embodiment of an interlaminar shear resistance test device tested according to the interlaminar shear resistance test method of the present invention. In this embodiment, the clamp testing mechanism includes a temperature control box 1, a pressure loading machine 2, a pressure loading block 3 and a supporting base 5, and the pressure loading machine 2, the pressure loading block 3 and the supporting base 5 are all located in the temperature regulating box. within 1. 4-12 groups of samples 4 with a length of 5 mm are cut out from the wound composite material pipe along the axial direction. The sample 4 is axially placed on the support base 5 , and the sample 4 is clamped by the pressure loading block 3 .

[0034] The pressure loading machine 2 respectively pressurizes the sample 4 equipped with shear nails ...

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Abstract

The invention discloses a method for testing the interlaminar shear strength, which comprises the steps of: 1) cutting out a plurality of samples with the same length from a composite material pipe in the axial direction, and testing the samples by a clamp detection mechanism and by dropping The tool detects the remaining pipes separately; 2) multiple samples cut out by the fixture testing mechanism are tested separately, and the maximum value of the pressure and the median value of the multiple samples are taken as the minimum interlaminar shear force F1; And the shear failure load F2 of the lost-hand joint is measured by the lost-hand tool; the interlaminar shear strength τ1 of the sample is calculated by the formula, and the shear failure strength τ2 of the lost-hand joint is calculated by the formula; 3) the relationship is calculated according to the formula Coefficient α; 4) Increase the safety factor β for downhole tools made of different composite materials, and obtain the pump pressure P when the downhole tool interlayer is damaged according to the formula, that is, the interlaminar shear strength; this test method can reduce the Completion construction failure caused by insufficient interlayer shear strength.

Description

technical field [0001] The invention relates to a testing method, in particular to a testing method for interlaminar shear strength of composite materials used for processing non-metallic downhole tools. Background technique [0002] With the large-scale development of unconventional oil and gas reservoirs and high temperature and high pressure oil and gas reservoirs, higher requirements are put forward for the performance of well completion tools. Compared with metal materials, non-metallic materials have the advantages of corrosion resistance, high strength, light weight, easy drilling and milling, and easy flowback. Since the 1990s, the technology of using non-metallic materials to manufacture downhole tools has developed rapidly. . When the domestic petroleum industry is developing downhole tools and selecting composite materials, it has been found that winding glass fiber reinforced composite materials have good prospects for making easy-to-drill and high-strength down...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/24
Inventor 段友智连经社杨世刚何祖清詹美玲彭汉修姚志良侯倩梁滨陆松
Owner CHINA PETROLEUM & CHEM CORP
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