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Shale coring device

A coring device and shale technology, which is applied in the direction of sampling device, undisturbed core extraction device, earth square drilling, etc., can solve problems such as rock sample rupture, achieve the effect of weakening molecular collision and ensuring integrity

Active Publication Date: 2021-09-28
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a shale coring device, which aims to solve or at least improve to a certain extent the technical problem of large-area fracture of rock samples in the prior art when coring low-hardness shale

Method used

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Embodiment Construction

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0029] It should be noted that the terms "length", "width", "height", "thickness", "top", "bottom", "front", "back", "left", "right", "vertical" , "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for It is convenient to describe the present invention and simplify the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed a...

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Abstract

The invention is applicable to the technical field of geological sampling, and provides a shale coring device, which includes a casing, a door body, a rock sample clamping mechanism, a sampling cylinder and a driving mechanism. The outer casing is provided with an inner cavity structure and an opening; the door body and the outer casing are hinged to close the opening; the rock sample clamping mechanism is installed in the inner cavity structure for clamping and fixing shale rock samples; the sampling cylinder is located in the inner cavity structure , has a barrel chamber for moving along a straight line and penetrating the shale rock sample to obtain a core sample of the shale rock sample; a driving mechanism is installed on the shell and is used for driving the sampling barrel to move along a straight line. The shale coring device provided by the present invention avoids the traditional drilling type coring operation by setting a sampling cylinder that moves along a straight line and penetrates the shale rock sample for coring operation, and reduces the shale damage caused by friction during coring. Molecular collisions inside the core and avoid tearing of the shale core due to torsion. At the same time, there is almost no dust and noise during the coring process, which guarantees the integrity of the core with a high probability.

Description

technical field [0001] The invention belongs to the technical field of geological sampling, and more specifically relates to a shale coring device. Background technique [0002] Shale is generally composed of quartz, feldspar, pyrite, carbonate rock minerals, etc. Its hardness is generally 1.5-3 Platts hardness coefficient, and the Platts hardness coefficient of relatively dense structure can reach 4-5. Hard shale is harder. At the same time, shale has laminae or laminations in structure, which makes shale easy to break when subjected to external force, or seldom breaks through plastic deformation, and has a certain degree of brittleness. In addition, shale generally causes clay swelling, dispersion, and migration due to water injection, which will change the permeation channel and destroy its internal structure, resulting in changes in the permeability of the reservoir rock. [0003] When workers conduct shale oil and gas geological surveys and coring collected cores or r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B25/00G01N1/08
CPCE21B25/00G01N1/08
Inventor 唐玄郑逢赞孔祥飞张金川刘飏杜克锋王紫剑梁国栋
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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