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High-rank coal sample coring device

A high-rank coal and coring device technology, which is applied in the direction of extracting undisturbed core devices, earthwork drilling and mining, etc., can solve the problems of sample fracture, difficulty in accurately reflecting the characteristics of coal samples, and large sample test errors, so as to ensure integrity performance, improve test accuracy and reliability, and ensure reliability

Active Publication Date: 2021-07-20
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Claims
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Problems solved by technology

However, the sampling method of the drill pipe is difficult to realize the sampling of the sample with a complete structure, and problems such as sample fracture are easy to occur, which leads to subsequent test errors of the sample. Larger, difficult to accurately reflect the characteristics of coal samples

Method used

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  • High-rank coal sample coring device
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  • High-rank coal sample coring device

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Embodiment Construction

[0020] The following will be combined with Figure 1-3 The present invention is described in detail, and the technical solutions in the embodiments of the present invention are clearly and completely described. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0021] The present invention provides a high-rank coal sample coring device through improvement, which includes a sampling drill barrel 5, a radial groove cutting mechanism 6, an auxiliary cutting mechanism and a connecting column 1, and the upper end of the sampling drill barrel 5 adopts the The connecting column 1 is connected to the lower end of the sampling drill pipe, the center of the sampling drill barrel 5 is provided with a sampling cavity ...

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Abstract

The invention discloses a high-rank coal sample coring device. According to the high-rank coal sample coring device, during sampling, a radial groove cutting mechanism is shortened to the shortest state in the radial direction, a sampling drill barrel is driven by a sampling drill rod to rotate, and a sample core extends into a sampling cavity under the action of rotation of a sampling blade and downward movement of the sampling drill rod; after the sampling length is reached, the radial groove cutting mechanism extends and moves towards the radial inner side in the radial direction while the sampling drill barrel rotates, and after the radial groove cutting mechanism reaches a certain degree, an auxiliary cutting mechanism acts to cut off the sample core, so that the sampling efficiency can be effectively improved, the integrity of a sample is ensured, and the subsequent test precision and reliability of the sample are improved.

Description

technical field [0001] The invention specifically relates to a high-rank coal sample coring device, and relates to the related field of coring sample equipment. Background technique [0002] At present, in order to realize high-efficiency mining of coalbed methane wells in high-rank coal reservoirs, it is necessary to collect samples from high-rank coal reservoirs before mining, so as to conduct flow rate sensitivity, stress sensitivity tests, adsorption and other tests. However, the sampling method of the drill pipe is difficult to realize the sampling of the sample with a complete structure, and problems such as sample breakage are easy to occur, which leads to subsequent test errors of the sample. Larger, it is difficult to accurately reflect the characteristics of coal samples. Contents of the invention [0003] Therefore, in order to solve the above-mentioned deficiencies, the present invention provides a high-rank coal sample coring device. [0004] The present inv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B25/00E21B25/10
CPCE21B25/00E21B25/10
Inventor 陶树汤达祯唐淑玲陈世达叶金诚门欣阳吴亚宁张彬
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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