Detachable drill pipe for geological prospecting drilling

Abstract

The utility model relates to the technical field of drilling, disclose a geological prospecting drilling is with detachable drill rod, including drill rod and with the most lower drill rod detachable connection's drill cylinder, between the adjacent two drill rod connecting end and the most lower drill rod and drill cylinder connecting end, one end is equipped with tenon block, the other end is equipped with tenon sleeve, tenon sleeve detachable cover is established in the circumferential side of tenon block, tenon block and tenon sleeve are respectively set up a plurality of first through -hole and second through -hole with one -to -one, and the first through -hole and second through -hole detachable connection have the sleeve pipe, the one end of sleeve pipe is provided with end plate, the other end is provided with drive blind hole, drive blind hole side wall swingly set up a plurality of limit block, and inside sliding connection has the filler block, and the filler block is slidably between first position and second position, when the filler block is at first position, the clamping end of limit block projects from sleeve pipe, and with end plate cooperation steady clamping is in the both sides of tenon sleeve, effectively solved the problem that limit block moves and leads to the unstable connection in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of drilling technology, and in particular to a detachable drill rod for geological prospecting drilling. Background Technology

[0002] Detachable drill pipes play a crucial role in modern geological exploration. With the increasing demand for resource exploration, their application scope continues to expand.

[0003] Patent CN222782607U discloses a detachable drill rod for geological and mining drilling. It includes a main rod body with tenons and an extension rod body equipped with tenon sleeves. Quick assembly and disassembly are achieved through sleeves, through holes, and limiting blocks. It also features a feeding and distributing mechanism, allowing for sampling by changing the rotation direction and separating samples. However, the existing technology has shortcomings. Firstly, the limiting block with three internal hinges in the through hole cannot fix the rotation angle due to its hinge characteristics; it remains movable after being pushed out, significantly reducing its limiting effect and affecting the stability of the drill rod connection. Secondly, the protective sleeve relies on spring return; when the drill rod drills downwards, the friction between the surrounding soil and the protective sleeve easily causes the protective sleeve to move upwards, weakening its protective function and making the internal structure susceptible to damage, thus affecting the service life and reliability of the drill rod.

[0004] Given the shortcomings of existing detachable drill pipes used in geological prospecting drilling, it is crucial to improve and perfect them. Utility Model Content

[0005] The present invention aims to provide a detachable drill rod for geological prospecting drilling to overcome the shortcomings mentioned above.

[0006] In order to achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A detachable drill rod for geological prospecting includes a drill rod and a drill cylinder detachably connected to the lowermost drill rod. A tenon block is installed at one end of the connection between two adjacent drill rods, and a tenon sleeve is installed at the other end between the connection end of the lowermost drill rod and the drill cylinder. The tenon sleeve is detachably fitted around the periphery of the tenon block. The tenon block and the tenon sleeve each have a plurality of corresponding first and second through holes. A sleeve is detachably connected to each of the first and second through holes. One end of the sleeve has an end plate, and the other end has a drive blind hole. The drive blind hole sidewall is movably provided with multiple limiting blocks, and a filling block is slidably connected inside. The filling block can slide between a first position and a second position. In the first position, the end of the limiting block near the sleeve axis abuts against the filling block, and the end of the limiting block away from the sleeve axis protrudes from the sleeve. The limiting block and the end plate are engaged and locked on both sides of the tenon sleeve. In the second position, the filling block and the limiting block are staggered, and the end of the limiting block away from the sleeve axis can be embedded in the sleeve.

[0008] Furthermore, a plurality of the limiting blocks are spaced apart along the circumference of the sleeve, and a first inclined surface is provided at one end of the limiting block near the filling block;

[0009] The outer wall of the filling block is provided with a plurality of driving grooves corresponding to the plurality of limiting blocks one by one. The driving groove is provided with a second inclined surface. In the first position, the second inclined surface slides and abuts against the first inclined surface.

[0010] Furthermore, an elastic element is provided inside the drive blind hole, and the elastic element is used to drive the filling block to move in a direction away from the end of the sleeve;

[0011] The first inclined surface and the second inclined surface are inclined in a direction away from the elastic element and towards the axis of the sleeve.

[0012] Furthermore, the end of the limiting block away from the filling block is provided with a snap-fit ​​end, the snap-fit ​​end is a wedge-shaped structure, the sleeve sidewall is provided with a through hole that communicates with the driving blind hole, and the snap-fit ​​end selectively snaps into the through hole.

[0013] Furthermore, the inner wall of the drive blind hole is provided with multiple sets of sliding protrusions, and the outer wall of the filling block is provided with multiple sliding grooves. The multiple sliding grooves are slidably connected to the multiple sets of sliding protrusions in a one-to-one correspondence, and the multiple sliding grooves and the multiple drive grooves are alternately arranged along the outer wall of the filling block.

[0014] Furthermore, a sealing plate is detachably connected to the side wall of the filling block away from the elastic member, and the sealing plate is used to seal the end of the sliding groove away from the elastic member.

[0015] Furthermore, a screw is fixedly connected to one end of the sealing plate near the elastic element, and a threaded blind hole is provided at the end of the filling block away from the elastic element. The screw and the threaded blind hole are detachably connected by threads.

[0016] Furthermore, between the two adjacent drill rod connection ends and the lowermost drill rod and drill barrel connection end, a first protective sleeve is movably connected to one outer wall and a second protective sleeve is movably connected to the other end, and the first protective sleeve and the second protective sleeve are detachably connected by threads.

[0017] Furthermore, an inner cylinder is detachably connected inside the drill barrel. The drill barrel and the inner cylinder are provided with a first opening and a second opening at the ends away from the drill rod. A sampling head is detachably connected to the first opening, and the end of the inner cylinder away from the drill rod abuts against the sampling head.

[0018] Furthermore, the top of the sampling head is provided with an annular groove, the end of the drill cylinder and the inner cylinder away from the drill rod abuts against the annular groove, the inner sidewall of the outer ring of the annular groove is provided with an internal thread, and the end of the drill cylinder away from the drill rod is provided with an external thread, and the two are threadedly connected.

[0019] The inner cylinder is split into two symmetrically arranged inner cylinder units along its radial direction, and the two inner cylinder units can be assembled into a cylindrical structure.

[0020] Compared with the prior art, this utility model has at least the following advantages:

[0021] (1) This utility model uses a filling block and a limiting block to cooperate. When the filling block is in the first position, the locking end of the limiting block protrudes out of the sleeve and cooperates with the end plate to be firmly locked on both sides of the tenon sleeve, which effectively solves the problem of unstable connection caused by the movement of the limiting block in the prior art.

[0022] (2) The present invention adopts a threaded connection between the first protective sleeve and the second protective sleeve. During the drilling process of the drill rod, even if it is subjected to vertical friction, the protective sleeve will not easily come off, effectively protecting the connection part of the drill rod, avoiding damage to the internal structure, extending the service life of the drill rod, and improving its reliability. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of the detachable drill rod for geological prospecting drilling according to this utility model;

[0025] Figure 2 This is a cross-sectional view of the detachable drill rod for geological prospecting drilling according to this utility model;

[0026] Figure 3 This is an exploded view of the detachable drill rod for geological prospecting drilling according to this utility model;

[0027] Figure 4 This utility model Figure 3 A magnified view of a portion of region A in the middle;

[0028] Figure 5 This is a schematic diagram of the structure of the sleeve of this utility model;

[0029] Figure 6 This is a front view of the limiting block of this utility model.

[0030] Reference numerals: 1. Drill rod; 2. Drill barrel; 3. Tenon block; 4. Tenon sleeve; 5. First through hole; 6. Second through hole; 7. Sleeve; 8. End plate; 9. Drive blind hole; 10. Limiting block; 11. Filling block; 12. First inclined surface; 13. Second inclined surface; 14. Elastic element; 15. Snap-fit ​​end; 16. Through hole; 17. Sliding protrusion; 18. Sliding groove; 19. Sealing plate; 20. Screw; 21. Threaded blind hole; 22. First protective sleeve; 23. Second protective sleeve; 24. Inner cylinder; 25. Sampling head. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Reference Figure 1-3 This utility model provides a detachable drill rod for geological prospecting drilling, mainly composed of a drill rod 1 and a drill cylinder 2 detachably connected to the lowermost drill rod 1. At the connection ends between drill rods 1 and between the lowermost drill rod 1 and the drill cylinder 2, a tenon block 3 and a tenon sleeve 4 are used for connection. The tenon block 3 is installed at one end, and the tenon sleeve 4 is installed at the other end, and the tenon sleeve 4 can be detachably fitted around the periphery of the tenon block 3.

[0034] Multiple first through holes 5 are provided on the tenon block 3, and multiple second through holes 6 are correspondingly provided on the tenon sleeve 4. The first through holes 5 and the second through holes 6 are detachably connected by the sleeve 7. One end of the sleeve 7 is provided with an end plate 8, and the other end is provided with a drive blind hole 9. Multiple limiting blocks 10 are movably provided on the side wall of the drive blind hole 9, and a filling block 11 is slidably connected inside. The filling block 11 is slidable between a first position and a second position. When it is in the first position, the end of the limiting block 10 near the axis of the sleeve 7 abuts against the filling block 11, while the end of the limiting block 10 away from the axis of the sleeve 7 protrudes out of the sleeve 7. At this time, the limiting block 10 and the sealing fit can be engaged on both sides of the tenon sleeve 4. When the filling block 11 is in the second position, the filling block 11 and the limiting block 10 are offset, so that the end of the limiting block 10 away from the axis of the sleeve 7 can be embedded inside the sleeve 7. At this time, the other end of the sleeve 7 can be inserted into the first through hole 5 and the second through hole 6, or the sleeve 7 can be removed from the first through hole 5 and the second through hole 6.

[0035] Combined with reference Figure 4-6 Multiple limiting blocks 10 are distributed circumferentially along the sleeve 7, and a first inclined surface 12 is provided at the end of each limiting block 10 near the filling block 11. Multiple driving grooves are correspondingly provided on the outer wall of the filling block 11, and a second inclined surface 13 is provided in each driving groove. When the filling block 11 is in the first position, the second inclined surface 13 and the first inclined surface 12 can slide and abut against each other. Furthermore, an elastic element 14 is provided in the driving blind hole 9. The function of the elastic element 14 is to drive the filling block 11 to move away from the end of the sleeve 7, and the first inclined surface 12 and the second inclined surface 13 are inclined towards the axis of the sleeve 7 along the direction away from the elastic element 14. Specifically, the elastic element 14 can be a compression spring, with its two ends connected to the end wall of the driving blind hole 9 and the filling block 11, respectively.

[0036] Optionally, the end of the limiting block 10 away from the filling block 11 is provided with a snap-fit ​​end 15, which has a wedge-shaped structure. The side wall of the sleeve 7 is provided with a through hole 16 that communicates with the drive blind hole 9, and the snap-fit ​​end 15 can selectively snap into the through hole 16.

[0037] To achieve precise alignment between the limiting block 10 and the driving groove, and to prevent relative rotation between the filling block 11 and the driving blind hole 9, the inner wall of the driving blind hole 9 is provided with multiple sets of sliding protrusions 17, while the outer wall of the filling block 11 is provided with multiple sliding grooves 18. These sliding grooves 18 correspond one-to-one with the sliding protrusions 17 and are slidably connected. At the same time, the multiple sliding grooves 18 and the multiple driving grooves are arranged alternately along the outer wall of the filling block 11.

[0038] A sealing plate 19 is detachably connected to the side wall of the filling block 11 away from the elastic element 14. The sealing plate 19 is used to seal the end of the sliding groove 18 away from the elastic element 14. A screw 20 is fixedly connected to the end of the sealing plate 19 near the elastic element 14. A threaded blind hole 21 is provided at the end of the filling block 11 away from the elastic element 14. The screw 20 and the threaded blind hole 21 are detachably connected by threads. During the use of the drill rod 1 and the drill barrel 2, a lot of vibration occurs. In order to avoid the filling block 11 and the limiting block 10 from being misaligned due to vibration, and to prevent the interaction between the limiting block 10 and the tenon 4 from being released, this utility model provides a sealing plate 19 to ensure that the first inclined surface 12 and the second inclined surface 13 are always in contact.

[0039] Between the connecting ends of two adjacent drill rods 1 and the connecting end of the lowest drill rod 1 and the drill barrel 2, a first protective sleeve 22 is movably connected to the outer wall of one end. The first protective sleeve 22 and the outer wall of one end can move and rotate axially. A second protective sleeve 23 is movably connected to the other end. The second protective sleeve 23 and the outer wall of the other end can move and rotate axially. The first protective sleeve 22 and the second protective sleeve 23 are detachably connected by threads. A first annular protrusion is provided on the outer edge of one end of the first protective sleeve 22, a second annular protrusion is provided on the inner side of the end of the first protective sleeve 22 away from the second protective sleeve 23, a third annular protrusion is provided on the outer edge of the other end of the first protective sleeve 22, and a fourth annular protrusion is provided on the inner side of the end of the second protective sleeve 23 away from the first protective sleeve 22. When the first protective sleeve 22 and the second protective sleeve 23 are threaded together, the first annular protrusion abuts against the second annular protrusion, and the third annular protrusion abuts against the fourth annular protrusion. This allows the first protective sleeve 22 and the second protective sleeve 23 to be positioned along the axis of the drill rod 1. At this time, the tube 7 of the first protective sleeve 22 and the tube 7 of the second protective sleeve 23 can still rotate circumferentially along the drill rod 1. By adopting the above connection method, the situation where the first protective sleeve 22 and the second protective sleeve 23 separate from each other due to vertical friction can be reduced.

[0040] An inner cylinder 24 is detachably connected inside the drill barrel 2. The drill barrel 2 and the inner cylinder 24, at their ends away from the drill rod 1, respectively have a first opening and a second opening. A sampling head 25 is detachably connected to the first opening, and the end of the inner cylinder 24 away from the drill rod 1 abuts against the sampling head 25. An annular groove is provided at the top of the sampling head 25, and the ends of the drill barrel 2 and the inner cylinder 24 away from the drill rod 1 abut against the annular groove. The inner wall of the outer ring of the annular groove has internal threads, and the end of the drill barrel 2 away from the drill rod 1 has external threads; the two are connected by threads. The inner cylinder 24 is divided into two symmetrically arranged inner cylinder 24 units along its radial direction, and these two inner cylinder 24 units can be assembled into a cylindrical structure.

[0041] Before conducting geological prospecting drilling operations, determine the number of drill rod sections 1 required based on the required drilling depth and geological conditions. Connect the drill barrel 2 to the bottom drill rod 1, and connect the upper end of the top drill rod 1 to the drilling rig. The structure of the upper end of the top drill rod 1 can adopt existing technical structures, as long as it can be connected to the drilling rig, without making any special settings.

[0042] The connection between adjacent drill rods 1 and between drill rod 1 and drill cylinder 2 is as follows: Align the adjacent tenon block 3 with the tenon sleeve 4, insert the tenon block 3 into the tenon sleeve 4, and then pass the sleeve 7 through the second through hole 6 on the tenon sleeve 4 and the first through hole 5 on the tenon block 3 in sequence, ensuring that one end plate 8 of the sleeve 7 abuts against the end of the tenon sleeve 4. Next, push the filling block 11 into the drive blind hole 9 and move it to the second position against the elastic force of the elastic member 14. Install the stop block at the through hole 16 to stop applying external force to the filling block 11. The filling block 11 moves to the first position under the action of the elastic force of the elastic member 14. At this time, the second inclined surface 13 slides against the first inclined surface 12. As the filling block 11 moves further, it drives the limiting block 10 to move outward, so that the locking end 15 of the limiting block 10 protrudes out of the sleeve 7, thereby locking onto both sides of the tenon sleeve 4. Then, install the sealing plate 19 on the filling block 11 to complete the connection between the drill cylinder 2 and the drill rod 1. Finally, the first protective sleeve 22 and the second protective sleeve 23 are connected by threads to protect the connection part.

[0043] The method for disconnecting adjacent drill rods 1 and drill rod 1 and drill barrel 2 is as follows: First, disconnect the connection between the first protective sleeve 22 and the second protective sleeve 23. Remove the sealing plate 19 from the filling block 11. Then, apply external force to the filling block 11 to overcome the elastic force of the elastic element 14 and move it to the second position. At this time, the limiting block 10 is offset from the filling block 11. Then, remove the limiting block 10 at the through hole 16. Remove the sleeve 7 from the second through hole 6 on the tenon sleeve 4 and the first through hole 5 on the tenon block 3. The connection between the tenon block 3 and the tenon sleeve 4 can then be disconnected.

[0044] The above method can realize the process of adding drill rod 1 as the drilling depth increases, and can also realize the process of disconnecting drill rod 1 from drill rod 1 and from drill barrel 2 after the construction operation is completed.

[0045] When drilling reaches the desired sampling location, the drill pipe 2 gradually descends into the ground through the rotation and downward movement of the drill rod 1. Upon reaching the sampling location, the drilled soil sample enters the inner cylinder 24. The drilling equipment is then controlled to stop the rotation of the drill rod 1 and slowly lift it upwards. After being lifted above the surface, the sampling head 25 is removed from the drill pipe 2, and the inner cylinder 24 is taken out of the drill pipe 2. Since the inner cylinder 24 is composed of two symmetrical inner cylinder units, this structure facilitates the subsequent removal and separation of the inner cylinder 24 from the drill pipe 2 for analysis and research of the collected samples.

[0046] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A detachable drill rod for geological prospecting drilling, characterized in that, The system includes a drill rod (1) and a drill cylinder (2) detachably connected to the lowermost drill rod (1). A tenon (3) is installed at one end of the connection between two adjacent drill rods (1) and between the lowermost drill rod (1) and the drill cylinder (2), and a tenon sleeve (4) is installed at the other end. The tenon sleeve (4) is detachably fitted around the tenon (3). The tenon (3) and tenon sleeve (4) each have a plurality of corresponding first through holes (5) and second through holes (6). A sleeve (7) is detachably connected to the first through holes (5) and second through holes (6). One end of the sleeve (7) is provided with an end plate (8), and the other end is provided with a drive blind hole (9). The drive blind hole (9) has a... The wall is equipped with multiple limiting blocks (10) and a filling block (11) is slidably connected inside. The filling block (11) can slide between a first position and a second position. In the first position, the end of the limiting block (10) near the axis of the sleeve (7) abuts against the filling block (11), and the end of the limiting block (10) away from the axis of the sleeve (7) protrudes from the sleeve (7). The limiting block (10) and the end plate (8) are engaged and locked on both sides of the tenon (4). In the second position, the filling block (11) and the limiting block (10) are staggered. The end of the limiting block (10) away from the axis of the sleeve (7) can be embedded in the sleeve (7).

2. The detachable drill rod for geological prospecting drilling according to claim 1, characterized in that, Multiple limiting blocks (10) are arranged at intervals along the circumference of the sleeve (7), and a first inclined surface (12) is provided at one end of the limiting block (10) near the filling block (11); The outer wall of the filling block (11) is provided with a plurality of driving grooves corresponding to the plurality of limiting blocks (10) one by one. The driving groove is provided with a second inclined surface (13). In the first position, the second inclined surface (13) slides against the first inclined surface (12).

3. The detachable drill rod for geological prospecting drilling according to claim 2, characterized in that, An elastic element (14) is provided inside the drive blind hole (9), and the elastic element (14) is used to drive the filling block (11) to move in a direction away from the end of the sleeve (7); The first inclined surface (12) and the second inclined surface (13) are inclined in a direction away from the elastic member (14) toward the axis of the sleeve (7).

4. The detachable drill rod for geological prospecting drilling according to claim 3, characterized in that, The limiting block (10) has a snap-fit ​​end (15) at one end away from the filling block (11). The snap-fit ​​end (15) has a wedge-shaped structure. The sleeve (7) has a through hole (16) on its side wall that communicates with the driving blind hole (9). The snap-fit ​​end (15) is selectively snapped into the through hole (16).

5. The detachable drill rod for geological prospecting drilling according to claim 3, characterized in that, The inner wall of the drive blind hole (9) is provided with multiple sets of sliding protrusions (17), and the outer wall of the filling block (11) is provided with multiple sliding grooves (18). The multiple sliding grooves (18) and the multiple sets of sliding protrusions (17) are slidably connected in a one-to-one correspondence. The multiple sliding grooves (18) and the multiple drive grooves are alternately arranged along the outer wall of the filling block (11).

6. The detachable drill rod for geological prospecting drilling according to claim 5, characterized in that, The filling block (11) is detachably connected to a sealing plate (19) on the side wall away from the elastic member (14), and the sealing plate (19) is used to seal the end of the sliding groove (18) away from the elastic member (14).

7. The detachable drill rod for geological prospecting drilling according to claim 6, characterized in that, The sealing plate (19) is fixedly connected to a screw (20) at one end near the elastic element (14), and the filling block (11) is provided with a threaded blind hole (21) at one end away from the elastic element (14). The screw (20) and the threaded blind hole (21) are detachably connected by threads.

8. The detachable drill rod for geological prospecting drilling according to any one of claims 2 to 7, characterized in that, Between the connecting ends of two adjacent drill rods (1) and the connecting end between the lowest drill rod (1) and the drill barrel (2), a first protective sleeve (22) is movably connected to the outer wall of one end, and a second protective sleeve (23) is movably connected to the other end. The first protective sleeve (22) and the second protective sleeve (23) are detachably connected by threads.

9. The detachable drill rod for geological prospecting drilling according to claim 1, characterized in that, The drill barrel (2) is detachably connected to an inner cylinder (24). The drill barrel (2) and the inner cylinder (24) are provided with a first opening and a second opening at the ends away from the drill rod (1). The first opening is detachably connected to a sampling head (25). The end of the inner cylinder (24) away from the drill rod (1) abuts against the sampling head (25).

10. The detachable drill rod for geological prospecting drilling according to claim 9, characterized in that, The top of the sampling head (25) is provided with an annular groove. The end of the drill cylinder (2) and the inner cylinder (24) away from the drill rod (1) abuts against the annular groove. The inner side wall of the outer ring of the annular groove is provided with an internal thread. The end of the drill cylinder (2) away from the drill rod (1) is provided with an external thread. The two are threadedly connected. The inner cylinder (24) is split into two symmetrically arranged inner cylinder (24) units along its radial direction, and the two inner cylinder units can be assembled into a cylindrical structure.

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