Drill bit device capable of continuously sampling geology

Abstract

The invention relates to the technical field of geological sampling, in particular to a drill bit device capable of realizing continuous geological sampling, which comprises a drill rod, a drill bit is detachably mounted at the bottom end of the drill rod, the drill bit comprises an upper-end drill bit and a bottom-end drill bit, the upper-end drill bit is in threaded connection with the drill rod, and the interior of the upper-end drill bit is of a hollow structure; a clamping structure is arranged in the upper end drill bit in a sliding mode, a connecting structure which is inserted into the clamping structure and matched with the clamping structure is arranged on the bottom end drill bit, an elastic structure is arranged on the outer side of the clamping structure in a sleeving mode, and a second mounting groove corresponding to the first mounting groove is formed in the clamping structure. And pressing structures are placed in the mounting groove I and the mounting groove II. Through cooperation of related structures, torque transmission can be guaranteed, relative sliding can be achieved, the drill bit can work normally before failure and fall off in time after failure, continuous geological sampling can be achieved without lifting or pulling out the drill bit, and the working efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of geological sampling, in particular to a drill bit device capable of continuous geological sampling. Background Art

[0002] The object of geological sampling is various strata. In order to obtain stratum samples, a core tube is usually installed inside the drill pipe. As the drill bit goes deeper into the ground, the drill bit will be worn by soil, rocks, gravel and other structures until it fails.

[0003] When a drill bit fails, workers usually need to stop sampling and pull out all the drill rods deep underground before replacing the drill bit at the bottom of the drill rod. After the drill bit is replaced, the pulled-out drill rods are connected one by one and sent underground before geological sampling can be continued. At present, the process of pulling out and pulling out the drill due to drill bit failure is unavoidable, which seriously affects the progress of the project and the efficiency of construction. In order to solve the above problem, the present invention proposes a drill bit device capable of continuous geological sampling. Summary of the invention

[0004] In view of this, the purpose of the present invention is to propose a drill bit device that can continuously take geological samples, so as to solve the problem that after the existing drill bit wears out and fails, the drill rod needs to be pulled out from deep underground to replace the drill bit, and after the replacement is completed, the drill rod and drill bit need to be sent back into the deep underground, which reduces the project progress and construction efficiency.

[0005] Based on the above purpose, the present invention provides a drill bit device capable of continuous geological sampling, comprising a drill rod, a drill bit is detachably mounted on the bottom end of the drill rod, the drill bit comprises an upper drill bit and a bottom drill bit, the upper drill bit is threadedly connected to the drill rod, and the interior of the upper drill bit is a hollow structure, a clamping structure is slidably arranged inside the upper drill bit, a connecting structure inserted into the clamping structure and adapted to the clamping structure is arranged on the bottom drill bit, and an elastic structure is sleeved on the outer side of the clamping structure; The upper drill bit is provided with a first mounting groove, the clamping structure is provided with a second mounting groove corresponding to the first mounting groove, and a clamping structure is placed in the first mounting groove and the second mounting groove, a spring is installed in the first mounting groove, and the top end of the spring is connected to the bottom end of the clamping structure, and under the action of the pre-tensioning force of the spring, the clamping structure can be tightly pressed on the elastic structure, so that the elastic structure is tightened to shrink the clamping structure, so as to achieve close contact between the clamping structure and the connecting structure; The bottom end of the clamping structure is fixedly connected with a push rod, and a hole is provided in the bottom drill bit for the push rod to extend into the bottom drill bit.

[0006] Preferably, the clamping structure comprises a hollow cylinder slidably disposed in the upper end drill bit, the hollow cylinder is formed by splicing three arc blocks 1 and three arc blocks 2, and the mounting groove 2 is provided on one of the arc blocks 1.

[0007] Preferably, the inner side surface of the arc block one is adapted to the side surface of the arc block two, and the outer sides of the arc block one and the arc block two are fixedly connected with a side T-bar one, a side T-slot one for placing the side T-bar one is opened in the upper end drill bit, and the inner sides of the arc block one and the arc block two are fixedly connected with a side T-bar two.

[0008] Preferably, the connection structure includes a connection column fixedly connected to the bottom drill bit, the top of the connection column is fixedly connected to a prism inserted in the hollow cylinder, and the surface of the prism is provided with a side T-slot 2 for placing a side T-bar 2.

[0009] Preferably, the bottom drill bit, the connecting column and the prism are integrally formed, and the bottom drill bit, the connecting column and the prism are all hollow inside.

[0010] Preferably, the surfaces of the arc block 1 and the arc block 2 are both provided with an annular groove for accommodating the elastic structure.

[0011] Preferably, the elastic structure is arranged in an annular structure.

[0012] Preferably, the elastic structure is an elastic ring, the elastic ring is placed in the annular groove, and the elastic ring is made of a high-elastic composite rubber material.

[0013] Preferably, the pressing structure is a wedge-shaped structure.

[0014] Preferably, the clamping structure is a wedge block, which is placed in mounting groove one and mounting groove two. A side T-bar three is fixedly connected to the wedge block, and a side T-slot three for placing the side T-bar three is provided in the mounting groove one. The top end of the spring is connected to the bottom end of the wedge block, and there are two springs. The push rod is also fixedly connected to the bottom end of the wedge block and is located between the two springs. Under the action of the pre-tensioning force of the spring, the wedge block can be pulled downward so that the inclined surface on the wedge block is tightly pressed against the elastic ring.

[0015] The beneficial effects of the present invention are as follows: Under the action of the spring pre-tensioning force, the clamping structure can be pulled downward, so that the clamping structure is tightly pressed on the elastic structure, so that the elastic structure is tightened and the clamping structure is contracted, so that the clamping structure and the connecting structure are interference fit (that is, the internal space of the clamping structure after contraction is slightly smaller than the external structure of the connecting structure), so as to ensure that the bottom drill bit will not fall off due to its own weight during the drilling process, and the torque can be transmitted under the cooperation of the clamping structure and the connecting structure, thereby realizing the fastening installation of the bottom drill bit.

[0016] Through the setting of the push rod, when the wear of the bottom drill bit exceeds a predetermined value (that is, the bottom drill bit is worn to the bottom of the push rod), the bottom of the push rod is exposed and begins to bear the upward thrust from the ground. At this time, the push rod will push the clamping structure to move upward, and the amount of compression of the clamping structure on the elastic structure will become smaller. At this time, the clamping structure and the connecting structure are no longer in close contact, thus releasing the fixation of the bottom drill bit, causing the bottom drill bit to slide down and the upper drill bit to begin to contact the formation, thereby realizing continuous geological sampling without lifting or pulling out the drill, thereby improving the sampling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a drilling rig, a drill rod and a drill bit located on the bottom layer according to an embodiment of the present invention; Figure 2 It is a structural schematic diagram of a drill bit according to an embodiment of the present invention; Figure 3 This is a schematic structural diagram of an upper drill bit according to an embodiment of the present invention; Figure 4 This is a schematic structural diagram of a bottom drill bit and a connection structure according to an embodiment of the present invention; Figure 5 is a cross-sectional view of embodiment BB of the present invention; Figure 6 This is a schematic structural diagram of a clamping structure according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the arc block 1 according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the arc block 2 according to an embodiment of the present invention; Fig. 9 This is a schematic diagram of the structure of a wedge block, a spring and a push rod according to an embodiment of the present invention; Fig.10 This is a schematic diagram of the structure of an elastic ring according to an embodiment of the present invention; Fig.11 Schematic cross-sectional view of a drill bit according to an embodiment of the present invention.

[0019] In the figure: 1. walking device; 2. fuselage; 3. mast; 4. power head; 5. straightening device; 6. drill rod; 7. drill bit; 8. bottom drill bit; 9. upper drill bit; 10. clamping structure; 101. arc block one; 102. arc block two; 103. side T-bar one; 104. side T-bar two; 11. clamping structure; 12. push rod; 13. elastic structure; 14. connecting structure; 141. connecting column; 142. prism; 15. mounting groove one; 16. mounting groove two; 17. spring; 18. annular groove; 19. side T-bar three. DETAILED DESCRIPTION

[0020] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0021] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connecting" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11As shown, a drill bit device capable of continuous geological sampling is applied to a drilling rig, the drilling rig comprises a traveling device 1, and a fuselage 2 is arranged on the traveling device 1, a mast 3 is arranged on the fuselage 2, a power head 4 is arranged on the mast 3, and a drill rod 6 is installed on the power head 4, and a straightening device 5 for straightening the drill rod 6 is also arranged on the mast 3 (the traveling device 1, the fuselage 2, the mast 3, the power head 4 and the straightening device 5 all belong to the prior art and are not described in detail), comprising a drill rod 6, a drill bit 7 is detachably mounted on the bottom end of the drill rod 6, and the drill bit 7 comprises an upper end drill bit 9 and a bottom end drill bit 8, the upper end drill bit 9 is threadedly connected to the drill rod 6, and the upper end drill bit 9 is threadedly connected to the drill rod 6. The thread is screwed on the drill rod 6, and the rotation direction of the drill rod 6 is consistent with the screwing direction of the upper drill bit 9 on the drill rod 6, so that when the drill rod 6 drives the drill bit 7 to rotate and take samples, and when the upper drill bit 9 is installed on the drill rod 6, the inside of the drill rod 6 will press the clamping structure 10, so that the clamping structure 10 can be stably located in the upper drill bit 9, and the drill bit 7 can be stably fixed on the drill rod 6, and the interior of the upper drill bit 9 is a hollow structure, and the clamping structure 10 is slidably arranged in the upper drill bit 9, and the bottom drill bit 8 is provided with a connecting structure 14 inserted into the clamping structure 10 and adapted to the clamping structure 10, and the outer side of the clamping structure 10 is sleeved with an elastic structure 13; A mounting groove 15 is provided in the upper drill bit 9, and a mounting groove 2 16 corresponding to the mounting groove 15 is provided on the clamping structure 10, and a clamping structure 11 is placed in the mounting groove 15 and the mounting groove 2 16, and a spring 17 is installed in the mounting groove 15, and the top end of the spring 17 is connected to the bottom end of the clamping structure 11. Under the action of the pre-tightening tension of the spring 17, the clamping structure 11 can be tightly pressed on the elastic structure 13, so that the elastic structure 13 is tightened and the clamping structure 10 is contracted, so that the clamping structure 10 and the connecting structure 14 are closely abutted, so that the clamping structure 10 and the connecting structure 14 are interference fit (that is, the internal space of the clamping structure 10 after contraction is slightly smaller than the external structure of the connecting structure 14); A push rod 12 is fixedly connected to the bottom end of the clamping structure 11 , and the bottom of the push rod 12 is hemispherical. A hole is provided in the bottom drill bit 8 for the push rod 12 to extend into the bottom drill bit 8 .

[0023] When the wear of the bottom drill bit 8 exceeds a predetermined value, that is, the bottom drill bit 8 is worn to the bottom of the push rod, the bottom of the push rod 12 installed between the bottom drill bit 8 and the upper drill bit 9 will be exposed, and because the bottom of the push rod 12 is hemispherical, when the wear section of the bottom drill bit 8 is tangent to the hemispherical bottom of the push rod 12, the push rod 12 begins to bear the upward thrust from the ground, and the push rod 12 will overcome the elastic force of the spring 17 to push the clamping structure 11 to move upward, so that the clamping amount of the clamping structure 11 on the elastic structure 13 will become smaller. At this time, the clamping structure 10 and the connecting structure 14 are no longer in close contact, that is, the fixation of the bottom drill bit 8 is released, and the bottom drill bit 8 slides down, and the upper drill bit 9 begins to contact the formation, thereby realizing continuous geological sampling without lifting or pulling out the drill, thereby improving the sampling efficiency.

[0024] In a preferred embodiment of the present invention, the clamping structure 10 includes a hollow cylinder slidably arranged in the upper drill bit 9, the hollow cylinder is formed by splicing three arc blocks 101 and three arc blocks 102, the three arc blocks 101 and the three arc blocks 102 are spliced ​​with each other at intervals, and the installation groove 2 16 is opened on one of the arc blocks 101.

[0025] A hollow column is formed by splicing a plurality of arc blocks 101 and arc blocks 2 102 together, so that the connection structure 14 can be fastened in the hollow column under the tightening action of the elastic structure 13, thereby achieving the fastening installation of the bottom drill bit 8.

[0026] In another preferred embodiment of the present invention, the inner side surface of arc block one 101 is matched with the side surface of arc block two 102, so that three arc blocks one 101 and three arc blocks two 102 are spaced apart and spliced ​​to form a hollow cylinder, and the outer sides of arc block one 101 and arc block two 102 are fixedly connected with side T-bar one 103, a side T-slot one for placing side T-bar one 103 is provided in the upper end drill bit 9, and the inner sides of arc block one 101 and arc block two 102 are fixedly connected with side T-bar two 104.

[0027] By setting the side T-shaped bar 103 and the side T-shaped bar 104, it is convenient to transmit the torque of the upper drill bit to the bottom drill bit, which can ensure the transmission of torque and realize relative sliding, so as to facilitate the normal operation of the bottom drill bit 8 before failure and timely fall off after failure.

[0028] In another preferred embodiment of the present invention, the connecting structure 14 includes a connecting column 141 fixedly connected to the bottom drill bit 8, and the top of the connecting column 141 is fixedly connected to a prism 142 inserted into the hollow cylinder, and the surface of the prism 142 is provided with a side T-slot 2 for placing the side T-bar 2 104.

[0029] The prism 142 is a hexagonal prism, which can be well inserted into the hollow cylinder formed by the arc block 101 and the arc block 2 102. Through the setting of the side T-slot 2 and the side T-bar 2 104, the prism 142 can slide in the hollow cylinder, so as to ensure that the torque is transmitted to the bottom drill bit 8 and realize the relative sliding between the hollow cylinder and the prism 142, so as to facilitate the normal operation before the bottom drill bit 8 fails, and timely falling off after failure.

[0030] It should be noted that the bottom drill bit 8, connecting column 141 and prism 142 are an integrally formed structure, and the interiors of the bottom drill bit 8, connecting column 141 and prism 142 are all hollow, which is convenient for placing the core tube so that the core tube can go deep into the ground along with the drill bit.

[0031] It should be noted that the surfaces of arc block 1 101 and arc block 2 102 are both provided with annular grooves 18 for placing the elastic structure 13. The elastic structure 13 is an annular structure. Through the setting of the annular grooves, the elastic structure 13 can be stably mounted on the surface of the hollow cylinder formed by splicing the arc block 101 and the arc block 2 102, so that under the action of the pre-tightening force of the spring 17, the clamping structure 11 is pressed tightly against the elastic structure 13, so that the elastic structure 13 is tightened and the hollow cylinder is contracted, so as to achieve a close contact between the interior of the hollow cylinder and the surface of the prism 142, so that the interior of the hollow cylinder and the prism 142 are interference fit (that is, the internal space of the hollow cylinder after contraction is slightly smaller than the prism 142).

[0032] It should be noted that the elastic structure 13 is an elastic ring, which is placed in the annular groove 18. The elastic ring is made of a high-elastic composite rubber material, so that the elastic ring has a certain elastic force, which is convenient for the subsequent tightening of the elastic ring to shrink the hollow cylinder formed by the arc block 101 and the arc block 2 102, so as to achieve a close contact between the interior of the hollow cylinder and the surface of the prism 142, so that the interior of the hollow cylinder and the prism 142 are interference fit, so as to ensure that the bottom drill bit 8 will not fall off due to its own weight during the drilling process.

[0033] It should be noted that the pressing structure 11 is a wedge-shaped structure.

[0034] It should be noted that the clamping structure 11 is a wedge-shaped block, which is placed in mounting groove 15 and mounting groove 2 16. A side T-shaped bar 3 19 is fixedly connected to the wedge block, and a side T-shaped slot 3 for placing the side T-shaped bar 3 19 is provided in the mounting groove 15. The top end of the spring 17 is connected to the bottom end of the wedge block, and there are two springs 17. The push rod 12 is also fixedly connected to the bottom end of the wedge block and is located between the two springs 17. Under the action of the pre-tensioning force of the spring 17, the wedge block can be pulled downward so that the inclined surface on the wedge block is tightly pressed against the elastic ring.

[0035] When the wear of the bottom drill bit 8 exceeds a predetermined value, that is, the bottom drill bit is worn to the bottom of the push rod, the bottom of the push rod 12 installed between the bottom drill bit 8 and the upper drill bit 9 will be exposed and subjected to the upward thrust of the formation. At this time, the push rod 12 will overcome the elastic force of the spring and push the wedge block upward. Since the wedge block is a wedge-shaped structure, when the wedge block moves upward, the inclined surface on the wedge block and the surface of the elastic ring are separated from each other, that is, the compression amount of the elastic ring will become smaller, and the hollow column and the prism are no longer in close contact, that is, the fixation of the bottom drill bit 8 is released, and the bottom drill bit 8 slides down, and the upper drill bit 9 begins to contact the formation, thereby realizing continuous geological sampling without lifting or pulling out the drill.

[0036] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0037] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A drill bit device capable of continuous geological sampling, comprising a drill rod (6), a drill bit (7) being detachably mounted at the bottom end of the drill rod (6), characterized in that: The drill bit (7) comprises an upper drill bit (9) and a lower drill bit (8); the upper drill bit (9) is threadedly connected to the drill rod (6); the interior of the upper drill bit (9) is a hollow structure; a clamping structure (10) is slidably arranged in the upper drill bit (9); a connecting structure (14) is arranged on the lower drill bit (8) and is inserted into the clamping structure (10) and is matched with the clamping structure (10); an elastic structure (13) is sleeved on the outer side of the clamping structure (10); a first mounting groove (15) is provided in the upper drill bit (9); a second mounting groove (16) corresponding to the first mounting groove (15) is provided on the clamping structure (10); and the first mounting groove (15) and the second mounting groove (16) are connected to each other. A clamping structure (11) is placed in the first mounting groove (16), a spring (17) is installed in the first mounting groove (15), and the top end of the spring (17) is connected to the bottom end of the clamping structure (11). Under the action of the pre-tensioning force of the spring (17), the clamping structure (11) can be tightly pressed on the elastic structure (13), so that the elastic structure (13) is tightened to shrink the clamping structure (10), so that the clamping structure (10) and the connecting structure (14) are tightly abutted; the bottom end of the clamping structure (11) is fixedly connected to a push rod (12), and the bottom of the push rod (12) is hemispherical, and a channel for the push rod (12) to extend into the bottom end drill bit (8) is opened in the bottom end drill bit (8).

2. A drill bit device capable of continuous geological sampling according to claim 1, characterized in that: The clamping structure (10) comprises a hollow column slidably arranged in the upper end drill bit (9), the hollow column being formed by splicing three arc-shaped blocks one (101) and three arc-shaped blocks two (102), and the mounting groove two (16) is provided on one of the arc-shaped blocks one (101).

3. A drill bit device capable of continuous geological sampling according to claim 2, characterized in that: The inner side surface of the arc block 1 (101) is matched with the side surface of the arc block 2 (102), and the outer sides of the arc block 1 (101) and the arc block 2 (102) are fixedly connected with a side T-shaped bar 1 (103), the upper end drill bit (9) is provided with a side T-shaped groove 1 for accommodating the side T-shaped bar 1 (103), and the inner sides of the arc block 1 (101) and the arc block 2 (102) are fixedly connected with a side T-shaped bar 2 (104).

4. A drill bit device capable of continuous geological sampling according to claim 3, characterized in that: The connection structure (14) comprises a connection column (141) fixedly connected to the bottom drill bit (8), the top of the connection column (141) being fixedly connected to a prism (142) inserted into the hollow cylinder, the surface of the prism (142) being provided with a side T-shaped groove 2 for accommodating a side T-shaped strip 2 (104).

5. A drill bit device capable of continuous geological sampling according to claim 4, characterized in that: The bottom drill bit (8), the connecting column (141) and the prism (142) are arranged as an integrally formed structure, and the interiors of the bottom drill bit (8), the connecting column (141) and the prism (142) are all hollow.

6. A drill bit device capable of continuous geological sampling according to claim 3, characterized in that: The surfaces of the arc-shaped block 1 (101) and the arc-shaped block 2 (102) are both provided with an annular groove (18) for accommodating the elastic structure (13).

7. A drill bit device capable of continuous geological sampling according to claim 6, characterized in that: The elastic structure (13) is arranged in an annular structure.

8. A drill bit device capable of continuous geological sampling according to claim 7, characterized in that: The elastic structure (13) is an elastic ring, the elastic ring is placed in the annular groove (18), and the elastic ring is made of a high-elastic composite rubber material.

9. A drill bit device capable of continuous geological sampling according to claim 8, characterized in that: The pressing structure (11) is a wedge-shaped structure.

10. A drill bit device capable of continuous geological sampling according to claim 9, characterized in that: The clamping structure (11) is a wedge-shaped block, and the wedge-shaped block is placed in the mounting groove 1 (15) and the mounting groove 2 (16). The wedge-shaped block is fixedly connected with a side T-shaped bar 3 (19), and the mounting groove 1 (15) is provided with a side T-shaped slot 3 for placing the side T-shaped bar 3 (19). The top end of the spring (17) is connected to the bottom end of the wedge-shaped block, and the number of the springs (17) is two. The push rod (12) is also fixedly connected to the bottom end of the wedge-shaped block and is located between the two springs (17). Under the action of the pre-tensioning force of the spring (17), the wedge-shaped block can be pulled downward, so that the inclined surface on the wedge block is tightly pressed against the elastic ring.

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