Geologic structure depth-finding sampling device

Abstract

The utility model discloses a geological structure fixed depth sampling equipment, including the arrangement on the ground rig, is installed on the rig and takes the core drill rod, and the end of taking the core drill rod is connected with the main drill bit, and the rig drives taking the core drill rod and the main drill bit and drills into the stratum, and the inclinometer is provided with in taking the core drill rod, and the inclinometer passes through the circumference positioning part and takes the core drill rod and locks the circumference, and the position of taking the core drill rod and inclinometer opposite position is set up with the reserved opening, and the bevel of inclinometer is set up with the auxiliary core drill bit, and the axis of auxiliary core drill bit and the axis of taking the core drill rod intersect, and the front end of auxiliary core drill bit is opposite the reserved opening. Through setting up the auxiliary core drill bit and the related components of being able to lower in taking the core drill rod, can be in the same depth, in the four around positions carry out multiple sampling, obtain more samples, and do not need to carry out the construction and re -drilling, and the cost is effectively reduced, and the efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of geological exploration technology. Specifically, it is a geological structure depth sampling device. Background Technology

[0002] Current geological exploration mainly involves drilling rigs to drill holes in the strata to obtain samples at the required depth, thereby determining and analyzing geological structures and parameters.

[0003] During drilling, the drill rod continuously drills downwards. Generally, only one core sample the size of the drill rod's inner diameter can be obtained at the same depth plane. When more samples are needed at that depth plane, it is necessary to drill a new hole from the ground or use a pre-planning method, where the drill bit is driven at a specific angle above the plane (i.e., a turning direction) to obtain core samples at that depth plane location again. Both methods are time-consuming, technically challenging, and costly. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to provide a geological structure fixed-depth sampling device that can obtain stratum samples at the same depth plane multiple times.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a geological structure fixed-depth sampling device, including a drilling rig arranged on the ground, a core drill rod installed on the drilling rig, a main drill bit connected to the end of the core drill rod, the drilling rig driving the core drill rod and the main drill bit to drill into the formation, an inclinometer installed inside the core drill rod, the inclinometer being circumferentially locked to the core drill rod by a circumferential positioning component, a reserved opening being opened on the core drill rod at a position opposite to the inclinometer, an auxiliary core drill bit being fitted onto the inclined surface of the inclinometer, the axis of the auxiliary core drill bit intersecting the axis of the core drill rod, the front end of the auxiliary core drill bit facing the reserved opening, a power component being drivenly connected to the tail end of the auxiliary core drill bit, the power component being connected to a ground suspension device and lowered into the core drill rod, the power component axially descending to push the auxiliary core drill bit out through the reserved opening, and the power component rotating to drive the auxiliary core drill bit to drill into the formation.

[0006] In the aforementioned geological structure fixed-depth sampling equipment, a drive shaft is connected to the power output shaft of the power component via a universal joint, and the other end of the drive shaft is connected to the tail end of the auxiliary core drill bit via a universal joint.

[0007] The aforementioned geological structure fixed-depth sampling device includes an inner sleeve that slides within the core drill rod. The top end of the inner sleeve is connected to a ground suspension device via a steel cable, and the other end of the inner sleeve is fixedly connected to the top of the directional drilling device. An oblique opening is provided at the end of the inner sleeve opposite to the inclined surface of the directional drilling device. The power component is axially slidable within the inner sleeve, and the auxiliary core drill bit passes through the oblique opening. The power component is suspended within the inner sleeve and connected to the ground device via the drill rod.

[0008] In the aforementioned geological structure fixed-depth sampling device, a positioning protrusion is provided on the outer wall of the power component along its axial direction, and a vertical groove is provided on the inner wall of the inner sleeve along its axial direction, with the positioning protrusion slidingly engaged in the vertical groove.

[0009] The aforementioned geological structure depth sampling device includes a circumferential positioning component comprising a circumferential positioning groove and a circumferential positioning block. The circumferential positioning groove is provided on the bottom of the outer wall of the directional device, and the circumferential positioning block is disposed inside the core drill rod. The circumferential positioning block is inserted into the circumferential positioning groove to restrict the rotation of the directional device inside the core drill rod.

[0010] The aforementioned geological structure fixed-depth sampling device includes a support cylinder slidably disposed inside the core drill rod, a slider disposed on the outer side wall of the support cylinder, a sliding groove axially formed on the inner wall of the core drill rod, the slider slidingly engaging within the sliding groove, a positioning boss disposed inside the core drill rod near the main drill bit, and a circumferential positioning block fixedly mounted on the top end face of the support cylinder.

[0011] In the aforementioned geological structure fixed-depth sampling device, the core drill rod has two or more reserved openings along the circumferential direction, the number of circumferential positioning grooves is equal to the number of reserved openings, and the distribution angle of the circumferential positioning grooves is the same as the distribution angle of the reserved openings; the axial length of the inner sleeve is equal to the length of the reserved openings.

[0012] In the aforementioned geological structure depth sampling device, a guide surface is provided between two adjacent circumferential positioning grooves. One end of the guide surface is connected to the open end of one of the circumferential positioning grooves, and the other end of the guide surface is connected to the middle of the groove wall of the other circumferential positioning groove.

[0013] In the aforementioned geological structure fixed-depth sampling device, limit blocks are provided on both sides of the inclined surface of the directional device, and the limit blocks are in contact with the outer circumferential surface of the auxiliary core drill bit.

[0014] The technical solution of this utility model has achieved the following beneficial technical effects:

[0015] By installing a lowerable auxiliary coring bit and related components inside the coring drill rod, multiple samples can be taken at the same depth in all four directions to obtain more samples without the need for directional drilling or re-drilling, thus effectively reducing costs and improving efficiency. Attached Figure Description

[0016] Figure 1 A schematic diagram of the drilling process of this utility model;

[0017] Figure 2 A schematic diagram of the connection between the core drilling rod and the main drill bit of this utility model;

[0018] Figure 3 A schematic diagram of the auxiliary coring drill bit of this utility model located inside the coring drill rod;

[0019] Figure 4 A schematic diagram of the auxiliary core drilling bit of this utility model drilling out of the core drilling rod;

[0020] Figure 5 A three-dimensional structural diagram of the connection between the inner sleeve and the oblique device of this utility model;

[0021] Figure 6 A three-dimensional structural diagram of the support cylinder of this utility model.

[0022] The reference numerals in the figure are as follows: 1-Drilling rig; 2-Coring drill rod; 3-Main drill bit; 4-Coring tube; 5-Inner casing; 51-Beveled opening; 52-Lifting lug; 53-Vertical groove; 6-Bevel device; 61-Circumferential positioning groove; 62-Guide surface; 7-Auxiliary coring drill bit; 8-Power unit; 9-Reserved opening; 10-Drive shaft; 11-Support cylinder; 111-Slider; 112-Circumferential positioning block; 12-Positioning boss. Detailed Implementation

[0023] This embodiment includes a geological structure depth sampling device, such as... Figure 1-2 As shown, a drilling rig 1 is arranged on the ground, and a core drill rod 2 is installed on the drilling rig 1. The end of the core drill rod 2 is connected to a main drill bit 3. The drilling rig 1 drives the core drill rod 2 and the main drill bit 3 to drill into the formation. The core drill rod 2 has a core tube 4 inside. The existing core retrieval structure is adopted, that is, the core drill rod 2 and the main drill bit 3 drill into the ground, and the rock core enters into the core tube 4. When retrieving the rock core, the core tube 4 is pulled up. The claws at the end of the core tube 4 extend and hold the rock core, pull the rock core off and lift it up. Core retrieval can be performed without lifting the drill. The above structure is existing technology and will not be described in detail.

[0024] like Figure 3As shown, when multiple samplings are required at a certain depth, the core tube 4 is pulled out, and the following equipment is used for sampling. An inner sleeve 5 is slidably fitted inside the core drill rod 2. The top end of the inner sleeve 5 is connected to a ground suspension device via a steel cable. A directional guide 6 is installed inside the core drill rod 2. The end of the inner sleeve 5 is fixedly connected to the top of the directional guide 6. An angled opening 51 is provided at the position where the end of the inner sleeve 5 is opposite to the inclined surface of the directional guide 6. The directional guide 6 is circumferentially locked to the core drill rod 2 by a circumferential positioning component. A reserved opening 9 is provided on the core drill rod 2 at the position opposite to the directional guide 6. An auxiliary core drill bit 7 is fitted onto the inclined surface of the directional guide 6. Limit blocks are provided on both sides of the inclined surface of the directional guide 6. The auxiliary core drill bit 7 is fitted to the outer circumferential surface, which can restrict the auxiliary core drill bit 7 and make it rotate stably. The axis of the auxiliary core drill bit 7 intersects the axis of the core drill rod 2. The front end of the auxiliary core drill bit 7 faces the reserved opening 9. The tail end of the auxiliary core drill bit 7 is connected to the power component 8. The power component 8 is suspended in the inner sleeve 5 through the drill rod with a diameter smaller than that of the inner sleeve 5 and connected to the ground equipment. The inner sleeve 5 is lowered into the core drill rod 2 through the connection of the ground suspension equipment. The power component 8 can only slide axially in the inner sleeve 5. The auxiliary core drill bit 7 passes through the inclined opening 51.

[0025] Under the action of gravity, the power unit 8 descends axially to push the auxiliary coring drill bit 7 through the reserved opening 9. The power unit 8 rotates to drive the auxiliary coring drill bit 7, and under its own weight, the auxiliary coring drill bit 7 drills into the formation.

[0026] Specifically, the power output shaft of the power component 8 is connected to the drive shaft 10 via a universal joint. The other end of the drive shaft 10 is connected to the tail end of the auxiliary core drill bit 7 via a universal joint. The universal joint is used for transmission, so as to ensure that the power can be transmitted normally when there is a certain angle. The power component 8 adopts a downhole hydraulic motor.

[0027] like Figure 5 As shown, a positioning protrusion is provided on the outer wall of the power component 8 along its axial direction, and a vertical groove 53 is provided on the inner wall of the inner sleeve 5 along its axial direction. The positioning protrusion slides within the vertical groove 53, ensuring that the power component 8 can only slide up and down within the inner sleeve 5, thus counteracting the reaction torque and ensuring stable power output. Figure 5-6 As shown, the circumferential positioning component includes a circumferential positioning groove 61 and a circumferential positioning block 112. The circumferential positioning groove 61 is provided on the bottom of the outer wall of the directional tool 6. The circumferential positioning block 112 is set inside the core drill rod 2. The circumferential positioning block 112 is inserted into the circumferential positioning groove 61 to restrict the rotation of the directional tool 6 inside the core drill rod 2. By using the circumferential positioning component, the rotation of the inner sleeve 5 and the directional tool 6 inside the core drill rod 2 is restricted, ensuring that the relative positions of the auxiliary core drill bit 7 will not change during the drilling process, so as to achieve smooth drilling and sampling.

[0028] To ensure smooth sampling during core drilling, the reserved opening 9 is sealed. Specifically, a support cylinder 11 is slidably installed inside the core drilling rod 2, and a slider 111 is installed on the outer wall of the support cylinder 11. A groove is opened along the axial direction on the inner wall of the core drilling rod 2, and the slider 111 slides in the groove. A positioning boss 12 is provided inside the core drilling rod 2 near the main drill bit 3, and the circumferential positioning block 112 is fixedly installed on the top end face of the support cylinder 11. The power unit 8 is installed inside the inner sleeve 5. The top of the inner sleeve 5 has a limiting block to prevent the power unit 8 from coming out of the top of the limiting block. The inner sleeve 5 and the directional device 6 are fixed at the ends to form an integral structure. When lowering, the inner sleeve 5 is suspended by a steel cable and connected to the power unit 8 through a thin drill rod. The suspended equipment and the drilling rig are lowered together. During drilling, only the drill rod is lowered without rotating. When the equipment is lowered into place, the directional device 6 presses down on the support cylinder 11 and slides down, exposing the reserved opening 9 until the support cylinder 11 hits the positioning boss 12 to form axial support. At the same time, the circumferential positioning groove 61 and the circumferential positioning block 112 are combined to form circumferential locking.

[0029] like Figure 5-6 As shown, in order to achieve sampling at the same depth in different directions without increasing the trouble of repeatedly lifting the main drill bit, two or more reserved openings 9 are opened along the circumferential direction on the core drill rod 2. The number of circumferential positioning grooves 61 is equal to the number of reserved openings 9, and the distribution angle of the circumferential positioning grooves 61 is the same as the distribution angle of the reserved openings 9. The axial length of the inner casing 5 is equal to the length of the reserved openings 9. After the first sampling using the auxiliary core drill bit 7, the auxiliary core drill bit 7 is lifted by the lifting power component 8. The power component 8 lifts the auxiliary core drill bit 7 through the transmission shaft 10. The chuck at the end of the auxiliary core drill bit 7 extends and clamps the rock core. Since the diameter of the auxiliary core drill bit 7 is small, the diameter of the obtained rock core is also small. When the auxiliary core drill bit 7 is lifted, it has a certain lateral force, which can easily break the rock core. This achieves one sampling, lifting the entire set of equipment, marking the azimuth angle, taking out the rock core, and then rotating it at the corresponding angle to align with other reserved openings 9 before lowering it again for a second sampling, thus achieving multiple sampling at the same depth.

[0030] To facilitate positioning, a guide surface 62 is provided between two adjacent circumferential positioning grooves 61. One end of the guide surface 62 is connected to the opening end of one circumferential positioning groove 61, and the other end of the guide surface 62 is connected to the middle of the groove wall of another circumferential positioning groove 61. Since the environment under the sampling hole is difficult to see directly, by setting the guide surface 62, after sampling at one angle is completed, it is only necessary to rotate a certain angle. When the circumferential positioning block 112 contacts the guide surface 62, the inclinometer 6 is automatically guided to rotate, so that the circumferential positioning block 112 enters the next circumferential positioning groove 61, thereby realizing the change of orientation angle.

[0031] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of the claims of this patent application.

Claims

1. A geological structure fixed-depth sampling device, comprising a drilling rig (1) arranged on the ground, wherein a core drill rod (2) is installed on the drilling rig (1), and a main drill bit (3) is connected to the end of the core drill rod (2), wherein the drilling rig (1) drives the core drill rod (2) and the main drill bit (3) to drill into the strata, characterized in that, The core drill rod (2) is equipped with a directional guide (6). The directional guide (6) is circumferentially locked to the core drill rod (2) by a circumferential positioning component. A reserved opening (9) is provided on the core drill rod (2) at a position opposite to the directional guide (6). An auxiliary core drill bit (7) is attached to the inclined surface of the directional guide (6). The axis of the auxiliary core drill bit (7) intersects the axis of the core drill rod (2). The front end of the auxiliary core drill bit (7) faces the reserved opening (9). A power component (8) is connected to the tail end of the auxiliary core drill bit (7). The power component (8) is connected to the ground suspension equipment and lowered into the core drill rod (2). The power component (8) descends axially and pushes the auxiliary core drill bit (7) out of the reserved opening (9). The power component (8) rotates and drives the auxiliary core drill bit (7) to drill into the formation.

2. The geological structure fixed-depth sampling device according to claim 1, characterized in that, The power output shaft of the power component (8) is connected to a drive shaft (10) via a universal joint, and the other end of the drive shaft (10) is connected to the tail end of the auxiliary core drill bit (7) via a universal joint.

3. The geological structure fixed-depth sampling device according to claim 1, characterized in that, The core drill rod (2) has an inner sleeve (5) that slides inside it. The top end of the inner sleeve (5) is connected to the ground suspension equipment via a steel cable. The other end of the inner sleeve (5) is fixedly connected to the top of the directional device (6). An oblique opening (51) is provided at the end of the inner sleeve (5) opposite to the oblique surface of the directional device (6). The power component (8) is axially slidingly fitted inside the inner sleeve (5). The auxiliary core drill bit (7) passes through the oblique opening (51). The power component (8) is connected to the ground equipment via the drill rod and suspended inside the inner sleeve (5).

4. A geological structure depth sampling device according to claim 3, characterized in that, The power component (8) has a positioning protrusion on its outer wall along its axial direction, and the inner wall of the inner sleeve (5) has a vertical groove (53) on its inner wall along its axial direction. The positioning protrusion slides in the vertical groove (53).

5. A geological structure depth sampling device according to claim 3, characterized in that, The circumferential positioning component includes a circumferential positioning groove (61) and a circumferential positioning block (112). The circumferential positioning groove (61) is provided on the bottom of the outer wall of the directional device (6). The circumferential positioning block (112) is disposed in the core drill rod (2). The circumferential positioning block (112) is inserted into the circumferential positioning groove (61) to restrict the directional device (6) from rotating in the core drill rod (2).

6. A geological structure depth sampling device according to claim 5, characterized in that, A support cylinder (11) is slidably disposed inside the core drill rod (2). A slider (111) is disposed on the outer wall of the support cylinder (11). A groove is provided along the axial direction on the inner wall of the core drill rod (2). The slider (111) is slidably fitted in the groove. A positioning boss (12) is provided inside the core drill rod (2) near the main drill bit (3). The circumferential positioning block (112) is fixedly installed on the top end face of the support cylinder (11).

7. A geological structure depth sampling device according to claim 6, characterized in that, The core drill rod (2) has two or more reserved openings (9) along the circumferential direction. The number of circumferential positioning grooves (61) is equal to the number of reserved openings (9), and the distribution angle of the circumferential positioning grooves (61) is the same as the distribution angle of the reserved openings (9). The axial length of the inner sleeve (5) is equal to the length of the reserved openings (9).

8. A geological structure depth sampling device according to claim 7, characterized in that, A guide surface (62) is provided between two adjacent circumferential positioning grooves (61). One end of the guide surface (62) is connected to the open end of one of the circumferential positioning grooves (61), and the other end of the guide surface (62) is connected to the middle of the groove wall of the other circumferential positioning groove (61).

9. A geological structure depth sampling device according to claim 1, characterized in that, Limiting blocks are provided on both sides of the inclined surface of the inclined device (6), and the limiting blocks are in contact with the outer circumferential surface of the auxiliary core drill bit (7).

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