Rock core sampling device for mineral exploration drilling

Abstract

The utility model relates to a mineral exploration drilling core sampling device which comprises a drill rod and a sampling assembly, the drill rod is hollow, the sampling assembly is movably installed in the drill rod, the sampling assembly comprises a sampling barrel, a rotating piece and a necking piece, the rotating piece is installed between the sampling barrel and the inner wall of the drill rod, and the necking piece is connected with the sampling barrel. The sampling barrel and the drill rod are arranged in a relative rotation mode, a sample cavity is formed in the sampling barrel, the lower end of the sample cavity is communicated with a sample channel of the drill rod, a notch is formed in the side wall of the sample cavity, and the necking piece is arranged on the periphery of the sample cavity in a sleeving mode. The diameter of the sample cavity is reduced through the necking piece, the rock sample is held tightly, the rock sample is prevented from falling out in the lifting process, the sampling success rate is effectively increased, one-time success is achieved, repeated sampling is avoided, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of geological drilling technology, and in particular to a core sampling device for mineral exploration drilling. Background Technology

[0002] Deep geological sampling is an important geological exploration activity, typically used to study the composition, structure, and physicochemical properties of subsurface rocks, minerals, and fluids. Existing traditional core sampling equipment for oil and gas well extraction lacks sufficient protective measures to safeguard the sampling tube and the collected core samples during actual sampling. This leads to sample damage or even loss from the sampling tube due to mechanical stress and environmental factors (such as vibration and shaking) during collection, resulting in sampling failures. Therefore, improvements are needed. Utility Model Content

[0003] Therefore, it is necessary to provide a core sampling device for mineral exploration drilling to address the above problems.

[0004] A core sampling device for mineral exploration drilling includes a drill rod and a sampling assembly. The drill rod is hollow, and the sampling assembly is movably installed inside the drill rod. The sampling assembly includes a sampling cylinder, a rotating component, and a constricting component. The rotating component is installed between the sampling cylinder and the inner wall of the drill rod. The sampling cylinder and the drill rod are rotatably arranged relative to each other. The sampling cylinder has a sample cavity inside, and the lower end of the sample cavity is connected to the sample channel of the drill rod. The side wall of the sample cavity has a notch, and the constricting component is sleeved around the sample cavity.

[0005] Preferably, the constriction component includes a locking clamp and a motor. The locking clamp is sleeved around the sample cavity, and the motor is installed on the outer wall of the sampling cylinder. The output end of the motor is connected to the end of the locking clamp.

[0006] Preferably, the top of the sampling cylinder is provided with a hook for connecting to the lifting device.

[0007] Preferably, the rotating component includes an inner ring, a plurality of rollers, and an outer ring. The inner ring is sleeved on the upper outer wall of the sampling cylinder, and the outer ring is movably engaged with the inner wall of the drill pipe. The plurality of rollers are movably installed between the inner ring and the outer ring.

[0008] Preferably, the inner wall of the sample cavity at the end that abuts against the sample channel is provided with horizontal barbs.

[0009] The advantages of this invention are: by using a narrowing part to reduce the diameter of the sample cavity, the rock sample is held tightly and prevented from falling out during lifting, which effectively improves the sampling success rate, ensures success on the first attempt, avoids multiple samplings, and improves work efficiency. Attached Figure Description

[0010] Figure 1This is a schematic diagram of the structure of a core sampling device for mineral exploration drilling in one embodiment;

[0011] Figure 2 This is a frontal view of the sampling cylinder. Detailed Implementation

[0012] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0013] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0014] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0015] like Figures 1-2As shown, a core sampling device for mineral exploration drilling includes a drill rod 1 and a sampling assembly 2. The drill rod 1 is hollow, and the sampling assembly 2 is movably installed inside the drill rod 1. The sampling assembly 2 includes a sampling cylinder 21, a rotating component 22, and a constricting component 23. The rotating component 22 is installed between the sampling cylinder 21 and the inner wall of the drill rod 1. The sampling cylinder 21 and the drill rod 1 are rotatably arranged relative to each other. The sampling cylinder 21 has a sample cavity 211 inside, and the lower end of the sample cavity 211 communicates with the sample channel 11 of the drill rod 1. The side wall of the sample cavity 211 has a notch 212, and the constricting component 23 is fitted around the sample cavity 211. Specifically, the sampling assembly 2 is movably installed inside the drill rod 1, and can be raised and lowered inside the drill rod 1 by a lifting device to complete the sampling. To prevent the drill rod 1 from rotating and drilling through the rock strata, thus affecting the sampling assembly 2, the sampling assembly 2 includes a sampling cylinder 21, a rotating component 22, and a constricting component 23. The rotating component 22 is positioned between the sampling cylinder 21 and the inner wall of the drill rod 1, ensuring that the sampling cylinder 21 remains stationary and independent during drilling. This prevents the drill rod 1 from causing the sampling cylinder 21 to rotate, which could result in the rock sample in the sample cavity 211 being flung out. During sampling, the rock sample enters the sample cavity 211 through the sample channel 11 of the drill rod 1. It is understood that the diameter of the sample cavity 211 is slightly larger than the diameter of the sample channel 11, allowing the rock sample to enter smoothly without being blocked at the port of the sample cavity 211. A notch 212 along the axial direction is provided on the side wall of the sample cavity 211, and a constriction member 23 is provided at the end of the sampling cylinder 21 that connects to the sample channel 11. When the rock sample enters the sampling cylinder 21, the constriction member 23 contracts, which causes the notch 212 to overcome its own tension and thus hold the rock sample tightly, preventing the rock sample from falling off when it is lifted.

[0016] like Figure 1 As shown, the constriction part 23 includes a locking clamp 231 and a motor 232. The locking clamp 231 is sleeved around the sample cavity 211, and the motor 232 is installed on the outer wall of the sampling cylinder 21. The output end of the motor 232 is connected to the end of the locking clamp 231. Specifically, the locking clamp 231 is a metal clamp that is fitted on the outside of the sample cavity 211. The locking clamp 231 wraps around the sampling cylinder 21, and one end is welded to the outer wall of the sampling cylinder 21. The other end of the locking clamp 231 can be engaged with the gear at the output end of the motor 232 through gear meshing, or the end of the locking clamp 231 can be directly connected to the output end of the motor 232. When the sample cavity 211 is loaded with rock sample and is waiting to be lifted, in order to prevent the rock sample from falling out, the locking clamp 231 can be tightened by the motor 232, thereby reducing the diameter of the port of the sample cavity 211, overcoming the tension at the opening end of the sample cavity 211, reducing the gap between the notches 212, and thus holding the rock sample in the sample cavity 211 tightly to prevent the rock sample from falling out.

[0017] like Figure 1 As shown, the top of the sampling cylinder 21 is provided with a hook 213 for connecting with the lifting device. The lifting device (not shown in the figure) drives the entire sampling assembly 2 to move up and down along the inner wall of the drill rod 1, so as to facilitate lifting the sampling cylinder 21 out and taking out the rock sample in the sampling cylinder 21.

[0018] like Figure 1 As shown, the rotating component 22 includes an inner ring 221, a plurality of rollers 222 and an outer ring 223. The inner ring 221 is sleeved on the upper outer wall of the sampling cylinder 21, and the outer ring 223 is movably engaged with the inner wall of the drill rod 1. The plurality of rollers 222 are movably installed between the inner ring 221 and the outer ring 223. Specifically, in this embodiment, the outer ring 223 is movably engaged with the inner wall of the drill rod 1, allowing the outer ring 223 to move up and down along the inner wall of the drill rod 1. When sampling the sampling component 2, the sampling component 2 can only move vertically up and down within the drill rod 1 without deviating. At the same time, during the drilling process of the drill rod 1, the outer ring 223 rotates relative to the inner ring 221 through the roller 222, reducing the relative friction between the inner ring 221 and the outer ring 223. This also ensures that when the drill rod 1 rotates, the sampling cylinder 21 is not affected by the rotation of the drill rod 1, maintaining a relatively independent posture and preventing the sampling cylinder 21 from shaking due to the rotation of the drill rod 1, which could cause the rock sample inside to fall out.

[0019] like Figure 1 As shown, the inner wall of the sample cavity 211 that abuts against the sample channel 11 is provided with horizontal barbs 214, which are used to increase the frictional force in contact with the rock sample and prevent the rock sample from falling out of the sampling tube 21 when the sample is lifted. Also, because the barbs 214 are hook-shaped, the resistance to the rock sample entering the sample cavity 211 is small.

[0020] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A mineral exploration drill core sampling device, characterised in that: The device includes a drill rod and a sampling assembly. The drill rod is hollow, and the sampling assembly is movably installed inside the drill rod. The sampling assembly includes a sampling cylinder, a rotating component, and a constricting component. The rotating component is installed between the sampling cylinder and the inner wall of the drill rod. The sampling cylinder and the drill rod are rotatably arranged relative to each other. The sampling cylinder has a sample cavity inside. The lower end of the sample cavity is connected to the sample channel of the drill rod. The side wall of the sample cavity has a notch. The constricting component is sleeved around the sample cavity.

2. A mineral exploration coring device as claimed in claim 1, characterised in that: The constriction component includes a locking clamp and a motor. The locking clamp is sleeved around the sample cavity, and the motor is installed on the outer wall of the sampling cylinder. The output end of the motor is connected to the end of the locking clamp.

3. A mineral exploration coring device as claimed in claim 1, characterised in that: The top of the sampling cylinder is provided with a hook for connecting to the lifting device.

4. A mineral exploration coring device as claimed in claim 1, characterised in that: The rotating component includes an inner ring, a plurality of rollers, and an outer ring. The inner ring is sleeved on the upper outer wall of the sampling cylinder, and the outer ring is movably engaged with the inner wall of the drill pipe. The plurality of rollers are movably installed between the inner ring and the outer ring.

5. A mineral exploration coring device as claimed in claim 1, characterised in that: The inner wall of the sample cavity that abuts against the sample channel is provided with horizontal barbs.

Images