US-12618751-B2 - Rock sample extraction device

US12618751B2US 12618751 B2US12618751 B2US 12618751B2US-12618751-B2

Abstract

The present invention discloses a rock sample extraction device, which comprises a downhole plate and a plurality of sampling components uniformly arranged on the downhole plate, wherein the sampling components are used for sampling rock samples in well areas with different depths, and each sampling component is used for sampling at the upper and lower ends of the same well area; each sampling component comprises anisotropic extraction cylinders arranged on the downhole plate and a power member arranged between the anisotropic extraction cylinders, and the power member drives the anisotropic extraction cylinders to perform telescopic movement in opposite directions, so that the anisotropic extraction cylinders can perform sampling operation when extending outwards.

Inventors

Hang BIAN
Zhaobin Zhang
Shouding Li
Xiao Li
Jianming He
Bo Zheng
Tianqiao Mao
Guanfang Li
Peng Guo

Assignees

INSTITUTE OF GEOLOGY AND GEOPHYSICS, CHINESE ACADEMY OF SCIENCES

Dates

Publication Date: 20260505
Application Date: 20240522
Priority Date: 20230525

Claims (8)

1 . A rock sample extraction device, comprising a downhole plate ( 1 ) and a plurality of sampling components ( 2 ) uniformly arranged on the downhole plate ( 1 ), wherein the sampling components ( 2 ) are used for sampling rock samples in well areas with different depths, and each sampling component ( 2 ) is used for sampling at upper and lower ends of a same well area; wherein, each of the sampling components ( 2 ) comprises anisotropic extraction cylinders ( 21 ) arranged on the downhole plate ( 1 ), and a power member ( 22 ), and wherein the power member ( 22 ) drives the anisotropic extraction cylinders ( 21 ) to perform telescopic movement in opposite directions, so that the anisotropic extraction cylinders ( 21 ) carry out sampling operations when extending outwards; wherein, for each of the sampling components ( 2 ), the anisotropic extraction cylinders ( 21 ) comprise a first extraction cylinder ( 211 ) and a second extraction cylinder ( 212 ) which are arranged at a relatively upper position and relatively lower position, respectively, wherein the power member ( 22 ) is arranged between the first extraction cylinder ( 211 ) and the second extraction cylinder ( 212 ); the downhole plate ( 1 ) is provided with a buckling plate ( 213 ) for supporting the first extraction cylinder ( 211 ) and a buckling plate ( 213 ) for supporting the second extraction cylinder ( 212 ); the first extraction cylinder ( 211 ) and the second extraction cylinder ( 212 ) are movably installed in the respective buckling plates ( 213 ) and can move freely along a length direction of the respective buckling plate ( 213 ); the power member ( 22 ) comprises a servo motor ( 221 ) installed on the downhole plate ( 1 ) and a rotating panel ( 222 ) arranged on an output shaft of the servo motor ( 221 ); a surface of the rotating panel ( 222 ) is fixedly provided with two pull rods ( 223 ); when the servo motor ( 221 ) rotates, the pull rods ( 223 ) are used to drive the first extraction cylinder ( 211 ) and the second extraction cylinder ( 212 ) to perform rotary telescopic movement along the length direction of the respective buckling plates ( 213 ); and the pull rods ( 223 ) are each provided with a respective tongue-shaped slot ( 224 ), and the first extraction cylinder ( 211 ) and the second extraction cylinder ( 212 ) are respectively provided with limit protrusions ( 7 ); the pull rods ( 223 ) drive the first extraction cylinder ( 211 ) and the second extraction cylinder ( 212 ) to do telescopic movement in the respective buckling plates ( 213 ) by using a limiting effect of the respective tongue-shaped slots ( 224 ) and the limit protrusions ( 7 ) when the rotating panel ( 222 ) makes circular movement.
2 . The rock sample extraction device according to claim 1 , wherein, for each of the sampling components ( 2 ), the first extraction cylinder ( 211 ) and the second extraction cylinder ( 212 ) are of hollow structures, and openings of the first extraction cylinder ( 211 ) and the second extraction cylinder ( 212 ) are provided with tapered chisel plates ( 3 ), and outer surfaces of the first extraction cylinder ( 211 ) and the second extraction cylinder ( 212 ) are provided with threaded grooves ( 4 ); an inner wall of each of the buckling plates ( 213 ) is provided with a stopper ( 5 ) inserted in the threaded grooves ( 4 ); the first extraction cylinder ( 211 ) and the second extraction cylinder ( 212 ) are driven by the power member ( 22 ) to perform rotary telescopic movement along the respective buckling plates ( 213 ).
3 . The rock sample extraction device according to claim 2 , wherein, for each of the sampling components ( 2 ), the inner wall of each of the buckling plates ( 213 ) is in an arc shape that wraps around the first extraction cylinder ( 211 ) and the second extraction cylinder ( 212 ), and upper and lower end faces of each of the buckling plates ( 213 ) are respectively provided with U-shaped slots ( 6 ), and a working shaft of the power member ( 22 ) drives the first extraction cylinder ( 211 ) and the second extraction cylinder ( 212 ) in the U-shaped slots to perform rotary telescopic movement.
4 . The rock sample extraction device according to claim 1 , wherein, for each of the sampling components ( 2 ), each of the limit protrusions ( 7 ) comprises a first elastic block ( 71 ), a second elastic block ( 72 ) and a vertical rod ( 73 ) arranged between the first elastic block ( 71 ) and the second elastic block ( 72 ); a distance between the first elastic block ( 71 ) and the second elastic block ( 72 ) in an unstressed state is the same as a thickness of the pull rods ( 223 ); and a diameter of each of the tongue-shaped slots ( 224 ) is the same as a diameter of the respective vertical rod ( 73 ), and each of the limit protrusions ( 7 ) can move circumferentially along the inside of the respective tongue-shaped slot ( 224 ).
5 . The rock sample extraction device according to claim 4 , wherein, for each of the sampling components ( 2 ), the first elastic block ( 71 ) comprises fixed blocks ( 8 ) fixedly installed at the ends of the first extraction cylinder ( 211 ) and the second extraction cylinder ( 212 ), and movable blocks ( 10 ) connected with the fixed blocks ( 8 ) through springs ( 9 ), wherein an elastic rubber block ( 11 ) is arranged between the fixed block ( 8 ) and the movable block ( 10 ); wherein, the fixed block ( 8 ) of the first elastic block ( 71 ) is fixedly installed with one end of the vertical rod ( 73 ), and the fixed block ( 8 ) of the second elastic block ( 72 ) is in threaded engagement with another end of the vertical rod ( 73 ).
6 . The rock sample extraction device according to claim 5 , wherein, for each of the sampling components ( 2 ), the diameters of the movable block ( 10 ) and the fixed block ( 8 ) are smaller than an inner diameter of the respective buckling plate ( 213 ), and both the movable block ( 10 ) and the fixed block ( 8 ) can move freely in an area surrounded by the inner wall of the respective buckling plate ( 213 ).
7 . The rock sample extraction device according to claim 2 , wherein, for each of the sampling components ( 2 ), the lengths of the first extraction cylinder ( 211 ) and the second extraction cylinder ( 212 ) are not greater than a width of the downhole plate ( 1 ), and an interval between two groups of sampling components ( 2 ) is not less than a length by which the pull rods ( 223 ) go beyond the respective buckling plates ( 213 ) in a vertical state.
8 . The rock sample extraction device according to claim 2 , wherein, for each of the sampling components ( 2 ), an end of each of the buckling plates ( 213 ) is provided with a protective cover ( 12 ), which is divided into a plurality of rubber blocks from a central position, and the protective covers ( 12 ) are used for protecting the ends of the first extraction cylinder ( 211 ) and the second extraction cylinder ( 212 ) before sampling.

Description

TECHNICAL FIELD The present invention relates to the technical field of rock sample sampling, and in particular to a rock sample extraction device. BACKGROUND Rock sample refers to the work of observing and describing the lithology, mineral composition, structural composition, biological fossils, sedimentary structure, occurrence, pore cracks, various secondary changes, oil-gas-water extravasation and oil-gas-bearing characteristics, and pixel description of rock samples collected during field geological work. The observation and description of rock samples is a process of correctly understanding the core, which is a very detailed geological basic work. It is necessary to comprehensively observe and highlight the key points. In field geological work, bored piles are mostly used for drilling, and then the distribution of strongly weathered rock samples, moderately weathered rock samples and slightly weathered rock samples under different well depths are distinguished by extracting and collecting rock samples (rock samples here specifically refer to borehole slag return) and testing and analyzing the physical properties of rock samples. However, most of the existing rock sample extraction devices in borehole are operated independently, that is, the extraction devices are successively lowered to different well depths according to the requirements, and the rock samples in borehole are extracted and collected for many times. This operation mode is easy to cause the problem of inaccurate sampling due to improper operation of the depth of the well. In addition, a single downhole operation can only achieve a single point acquisition operation for a well depth interval, and the sampling efficiency is low. SUMMARY The object of the present invention is to provide a rock sample extraction device to solve the problem of inaccurate sampling caused by improper downhole operation in the prior art. In addition, a single downhole operation can only achieve single-point sampling operation for a well depth interval, and the sampling efficiency is low. In order to solve the above technical problems, the present invention specifically provides the following technical solution: A rock sample extraction device, comprising a downhole plate and a plurality of sampling components uniformly arranged on the downhole plate, wherein the sampling components are used for sampling rock samples in well areas with different depths, and each sampling component is used for sampling at upper and lower ends of a same well area; wherein, each sampling component comprises anisotropic extraction cylinders arranged on the downhole plate, and a power member arranged between the anisotropic extraction cylinders, and the power member drives the anisotropic extraction cylinders to perform telescopic movement in opposite directions, so that the anisotropic extraction cylinders carry out sampling operations when extending outwards. As a preferred solution of the present invention, the anisotropic extraction cylinders comprise a first extraction cylinder and a second extraction cylinder which are arranged at upper and lower positions of the power member; a surface of the downhole plate is provided with a buckling plate for supporting the first extraction cylinder and the second extraction cylinder; the first extraction cylinder and the second extraction cylinder are movably installed in the buckling plate and can move freely along a length direction of the buckling plate. As a preferred solution of the present invention, the first extraction cylinder and the second extraction cylinder are of hollow structures, and openings of the first extraction cylinder and the second extraction cylinder are provided with tapered chisel plates, and outer surfaces of the first extraction cylinder and the second extraction cylinder are provided with threaded grooves; an inner wall of the buckling plate is provided with a stopper inserted in the threaded groove; the first extraction cylinder and the second extraction cylinder are driven by the power member to perform rotary telescopic movement along the inside of the buckling plate. As a preferred solution of the present invention, the inner wall of the buckling plate is in an arc shape that wraps around the first extraction cylinder and the second extraction cylinder, and upper and lower end faces of the buckling plate are respectively provided with U-shaped slots, and a working shaft of the power member drives the first extraction cylinder and the second extraction cylinder in the U-shaped slots to perform rotary telescopic movement. As a preferred solution of the present invention, the power member comprises a servo motor installed on the downhole plate and a rotating panel arranged on an output shaft of the servo motor; a surface of the rotating panel is fixedly provided with two pull rods in a same diameter direction; when the servo motor rotates, the pull rods are used to drive the first extraction cylinder and the se