Core storage pipe orifice opening and closing structure for fixed-point coring drilling tool and drilling tool

Abstract

The invention discloses a core storage pipe orifice opening and closing structure for a fixed-point coring drilling tool, the fixed-point coring drilling tool comprises a drill bit and a drilling tool body, the drill bit is mounted on the drilling tool body, the middle of the drill bit is provided with a through hole, the drilling tool body is cylindrical, and a core storage pipe is located in the drilling tool body; the core storage tube comprises a tube body and a tube opening structure, an opening of the tube body faces the through hole, and the tube opening structure is installed on the tube body; a spherical turning cover is arranged in the middle of the pipe opening structure, a through hole is formed in the middle of the turning cover, a rotating shaft is arranged on the turning cover, the turning cover is arranged on the pipe opening structure through the rotating shaft, and a gear is fixed to the rotating shaft. A gap is reserved between the pipe body and the drilling tool body, a driving rack is arranged in the gap, and the driving rack is meshed with the gear. The opening and closing state of the opening of the core storage pipe is changed by adopting a gear and rack driving mode, the design is more reasonable, the structure is simpler, and the operation is more stable.

Description

Technical Field

[0001] The invention relates to an opening and closing structure of a core storage tube orifice for a fixed-point coring drill tool, belonging to the technical field of mechanical equipment. Background Art

[0002] The technology of drilling directional cores is called directional coring. Directional coring technology is a coring method that can reflect the original position of the core underground. According to the oriented core, we can understand the inclination and direction of the underground rock formation, as well as the direction and law of the change of reservoir permeability on the plane and even in three-dimensional space. The application of directional coring technology developed rapidly in the 1970s. In order to obtain directional cores, the core must be oriented first. The earliest core orientation method used in production was the mechanical method, which uses tools and instruments to orient the core. At present, the coring drill tools on the market control the state of the coring structure by controlling the hydraulic pressure, and there are problems such as unreasonable structural design and unstable operation. Summary of the invention

[0003] The purpose of the present invention is to provide a core storage tube opening and closing structure for a fixed-point coring drill, which adopts a gear rack driving mode to change the opening and closing state of the core storage tube, has a more reasonable design, a simpler structure, and a more stable operation.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A core storage tube orifice opening and closing structure for a fixed-point coring drill tool. The fixed-point coring drill tool comprises a drill bit and a drill tool body. The drill bit is mounted on the drill tool body. The middle of the drill bit has a through hole. The drill tool body is cylindrical and the core storage tube is located in the drill tool body. The core storage tube comprises a tube body and a tube orifice structure. The opening of the tube body faces the through hole. The tube orifice structure is mounted on the tube body. The middle of the tube orifice structure has a spherical flap. The middle of the flap has a through hole. The flap has a rotating shaft. The flap is arranged on the tube orifice structure through the rotating shaft. A gear is fixed on the rotating shaft. A gap is left between the tube body and the drill tool body. A driving rack is provided in the gap. The driving rack is meshed with the gear.

[0006] In the aforementioned core storage tube orifice opening and closing structure for a fixed-point coring drill, the orifice structure includes a first sealing ring and a second sealing ring, both of which are fixed on the orifice structure, and both of which have arc-shaped surfaces, and the arc-shaped surfaces of the first sealing ring and the second sealing ring are both in contact with the spherical flip cover.

[0007] In the aforementioned core storage tube opening and closing structure for a fixed-point coring drill, a sleeve is provided in the gap, a first long hole is provided on the sleeve, and the driving rack is located in the first long hole.

[0008] A fixed-point coring drill adopts the core storage tube opening and closing structure described above, and also includes a back cover, the drill bit is installed at one end of the drill body, and the back cover is installed at the other end of the drill body. The back cover is provided with a solution cavity, and the solution cavity is connected to the inside of the drill body through a connecting hole; the drill body has a push cover structure, which is composed of a cover body and a ring plate. The cover body is in the shape of a circular plate, and is located at one end of the ring plate close to the back cover. The diameter of the cover body is equal to the inner diameter of the drill body, and one end of the ring plate abuts against the casing.

[0009] In the aforementioned fixed-point coring drill, the cover body is provided with an annular groove, a sealing ring is provided in the annular groove, the inner side of the sealing ring abuts against the cover body, and the outer side of the sealing ring abuts against the inner wall of the drill body.

[0010] In the aforementioned fixed-point coring drill, a support rod is arranged in the drill body, one end of the support rod abuts against the core storage tube, and the other end of the support rod abuts against the back cover. A through hole is arranged on the cover body, and the support rod passes through the through hole. The diameter of the support rod is equal to the diameter of the through hole.

[0011] In the aforementioned fixed-point coring drill, the following method is used for sampling:

[0012] In the initial state of the flip cover, the through hole is perpendicular to the drill body. The fixed-point coring drill is installed on the drilling device. When the drill reaches the specified depth, liquid is injected into the solution cavity, and then the liquid flows into the drill body between the push cover structure and the back cover. Under the action of the liquid, the push cover structure pushes the casing, and the casing drives the driving rack to move. The moving driving rack drives the gear to rotate, and the gear drives the flip cover to rotate until the perforation is parallel to the drill body. The sample passes through the perforation and the through hole into the core storage tube, and the sampling is completed;

[0013] After the sampling is completed, the solution is continuously injected into the solution cavity, and then the liquid flows into the drill body between the push cover structure and the back cover. Under the action of the liquid, the push cover structure pushes the casing, and the casing drives the driving rack to move. The moving driving rack drives the gear to rotate, and the gear drives the flip cover to rotate until the perforation is perpendicular to the drill body, closing the gate of the core storage tube.

[0014] Compared with the prior art, the present invention adopts a gear rack driving mode to change the opening and closing state of the core storage tube gate, and has a more reasonable design, a simpler structure, and a more stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0016] Figure 2 is a cross-sectional view of an embodiment of the present invention;

[0017] Figure 3 yes Figure 2 A partial enlarged view of

[0018] Figure 4 yes Figure 2 A partial enlarged view of .

[0019] Figure numerals: 1-drill bit, 2-drill tool body, 3-perforation, 4-tube mouth structure, 5-core storage tube, 6-tube body, 7-through hole, 8-flip cover, 9-rotating shaft, 10-gear, 11-driving rack, 12-gap, 13-first long hole, 14-casing, 15-first sealing ring, 16-second sealing ring, 17-through hole, 18-ring plate, 19-annular groove, 20-push cover structure, 21-connecting hole, 22-back cover, 23-solution chamber, 24-support rod, 25-cover body.

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0021] Embodiment 1 of the present invention: A core storage tube orifice opening and closing structure for a fixed-point coring drill, the fixed-point coring drill comprising a drill bit 1 and a drill body 2, the drill bit 1 being mounted on the drill body 2, the middle portion of the drill bit 1 having a through hole 3, characterized in that the drill body 2 is cylindrical, and the core storage tube 5 is located inside the drill body 2; the core storage tube 5 comprises a tube body 6 and a nozzle structure 4, the opening of the tube body 6 faces the through hole 3, the nozzle structure 4 being mounted on the tube body 6; the nozzle structure 4 having a spherical flap 8 in the middle portion, the flap 8 having a through hole 7 in the middle portion, the flap 8 having a rotating shaft 9, the flap 8 being arranged on the nozzle structure 4 via the rotating shaft 9, the rotating shaft 9 having a gear 10 fixed thereon; a gap 12 being left between the tube body 6 and the drill body 2, the gap 12 having a drive rack 11 in it, the drive rack 11 being meshed with the gear 10.

[0022] Embodiment 2: A core storage tube orifice opening and closing structure for a fixed-point coring drill, the fixed-point coring drill comprising a drill bit 1 and a drill body 2, the drill bit 1 being mounted on the drill body 2, the middle portion of the drill bit 1 having a through hole 3, and characterized in that the drill body 2 is cylindrical, and the core storage tube 5 is located inside the drill body 2; the core storage tube 5 comprises a tube body 6 and a nozzle structure 4, the opening of the tube body 6 faces the through hole 3, and the nozzle structure 4 is mounted on the tube body 6; the nozzle structure 4 has a spherical flap 8 in the middle portion, the flap 8 has a through hole 7 in the middle portion, the flap 8 has a rotating shaft 9, the flap 8 is arranged on the nozzle structure 4 via the rotating shaft 9, and a gear 10 is fixed on the rotating shaft 9; a gap 12 is left between the tube body 6 and the drill body 2, a drive rack 11 is provided in the gap 12, and the drive rack 11 is meshed with the gear 10.

[0023] The nozzle structure 4 includes a first sealing ring 15 and a second sealing ring 16, both of which are fixed on the nozzle structure 4, and both of which have arc-shaped surfaces, and the arc-shaped surfaces of the first sealing ring 15 and the second sealing ring 16 are in contact with the spherical flip cover 8. A sleeve 14 is provided in the gap 12, and a first long hole 13 is provided on the sleeve 14, and the driving rack 11 is located in the first long hole 13.

[0024] A fixed-point coring drill adopts the core storage tube orifice opening and closing structure described in the above embodiment, and also includes a back cover 22, the drill bit 1 is installed at one end of the drill body 2, and the back cover 22 is installed at the other end of the drill body 2, and a solution cavity 23 is provided on the back cover 22, and the solution cavity 23 is connected to the inside of the drill body 2 through a connecting hole 21; the drill body 2 has a push cover structure 20, and the push cover structure 20 is composed of a cover body 25 and a ring plate 18, the cover body 25 is in the shape of a circular plate, and the cover body 25 is located on the ring plate 18 near one end of the back cover 22, and the diameter of the cover body 25 is equal to the inner diameter of the drill body 2, and one end of the ring plate 18 abuts against the casing 14.

[0025] The cover body 25 is provided with an annular groove 19, and a sealing ring is provided in the annular groove 19, the inner side of the sealing ring abuts against the cover body 25, and the outer side of the sealing ring abuts against the inner wall of the drill body 2. A support rod 24 is provided in the drill body 2, one end of the support rod 24 abuts against the core storage tube 5, and the other end of the support rod 24 abuts against the rear cover 22. The cover body 25 is provided with a through hole 17, and the support rod 24 passes through the through hole 17, and the diameter of the support rod 24 is equal to the diameter of the through hole 17.

[0026] The following method is used for sampling: in the initial state, the through hole 7 of the flip cover 8 is perpendicular to the drill body 2, and the fixed-point coring drill is installed on the drilling device. After drilling to the specified depth, high-pressure water is injected into the solution cavity 23, and then the high-pressure water flows into the drill body 2 between the push cover structure 20 and the back cover 22. Under the action of the high-pressure water, the push cover structure 20 pushes the casing 14, and the casing 14 drives the driving rack 11 to move. The moving driving rack 11 drives the gear 10 to rotate, and the gear 10 drives the flip cover 8 to rotate until the perforation 3 is parallel to the drill body 2, and the sample passes through the perforation 3 and the through hole 7 into the core storage tube 5, and the sampling is completed;

[0027] After the sampling is completed, the drilling is suspended, and high-pressure water is injected into the solution cavity 23 again, and then the high-pressure water flows into the drill body 2 between the push cover structure 20 and the rear cover 22. Under the action of the high-pressure water, the push cover structure 20 pushes the casing 14, and the casing 14 drives the driving rack 11 to move. The moving driving rack 11 drives the gear 10 to rotate, and the gear 10 drives the flip cover 8 to rotate until the perforation 3 is perpendicular to the drill body 2, and the gate of the core storage tube 5 is closed.

[0028] The fixed-point coring drill is installed on the drilling device. Before the sampling device reaches the bottom of the hole, the cut-off valve core is in a closed state. After the sampling device is sent to the bottom of the hole for sampling drilling, the downhole hydrostatic pressure enters between the rear external joint and the piston through the connecting hole, causing the piston to push the drive tube and cut off the first pin. Then the drive tube drives the drive rack to move, the moving drive rack drives the gear to rotate, and the gear drives the cut-off valve core to rotate. The cut-off valve core is converted from the initial closed state to the open state, and the coal sample passes through the perforation and the through hole into the core storage tube, completing the sampling.

[0029] After completing the sampling, drilling is suspended and high-pressure water is injected again, gradually increasing the pump pressure and volume. Under the action of high-pressure water, the piston cuts off the second pin and pushes the drive tube to the bottom of the hole. The gear then drives the cut-off valve core to rotate synchronously, completing the valve core cutting off the coal sample. The coal sample is sealed in the core storage tube, and the high-pressure water injection pump is turned off to achieve closed sampling.

Claims

1. A core storage tube opening and closing structure for a fixed-point coring drill, the fixed-point coring drill comprising a drill bit (1) and a drill body (2), the drill bit (1) being mounted on the drill body (2), the middle of the drill bit (1) having a through hole (3), characterized in that: The drilling tool body (2) is cylindrical, and the core storage tube (5) is located in the drilling tool body (2); the core storage tube (5) comprises a tube body (6) and a nozzle structure (4), the opening of the tube body (6) faces the through hole (3), and the nozzle structure (4) is installed on the tube body (6); the middle part of the nozzle structure (4) is provided with a spherical flip cover (8), the middle part of the flip cover (8) is provided with a through hole (7), the flip cover (8) is provided with a rotating shaft (9), the flip cover (8) is arranged on the nozzle structure (4) through the rotating shaft (9), and a gear (10) is fixed on the rotating shaft (9); a gap (12) is left between the tube body (6) and the drilling tool body (2), and a driving rack (11) is provided in the gap (12), and the driving rack (11) is meshed with the gear (10).

2. The core storage tube opening and closing structure for a fixed-point coring drill according to claim 1, characterized in that: The nozzle structure (4) comprises a first sealing ring (15) and a second sealing ring (16), both of which are fixed on the nozzle structure (4), and both of which have arc-shaped surfaces, and both of which are in contact with the spherical flip cover (8).

3. The core storage tube opening and closing structure for a fixed-point coring drill according to claim 1, characterized in that: A sleeve (14) is provided in the gap (12), a first long hole (13) is provided on the sleeve (14), and the driving rack (11) is located in the first long hole (13).

4. A fixed-point coring drill, characterized in that: The core storage tube orifice opening and closing structure according to any one of claims 1 to 3 further comprises a rear cover (22), wherein the drill bit (1) is mounted on one end of a drill tool body (2), and the rear cover (22) is mounted on the other end of the drill tool body (2), and a solution chamber (23) is arranged on the rear cover (22), and the solution chamber (23) is connected to the inside of the drill tool body (2) through a connecting hole (21); a push cover structure (20) is provided inside the drill tool body (2), and the push cover structure (20) is composed of a cover body (25) and a ring plate (18), wherein the cover body (25) is in the shape of a circular plate, and the cover body (25) is located on one end of the ring plate (18) close to the rear cover (22), and the diameter of the cover body (25) is equal to the inner diameter of the drill tool body (2), and one end of the ring plate (18) abuts against the casing (14).

5. A fixed-point coring drill according to claim 4, characterized in that: The cover body (25) is provided with an annular groove (19), and a sealing ring is provided in the annular groove (19). The inner side of the sealing ring abuts against the cover body (25), and the outer side of the sealing ring abuts against the inner wall of the drilling tool body (2).

6. A fixed-point coring drill according to claim 5, characterized in that: A support rod (24) is arranged in the drilling tool body (2), one end of the support rod (24) abuts against the core storage tube (5), and the other end of the support rod (24) abuts against the rear cover (22); a through hole (17) is arranged on the cover body (25), and the support rod (24) passes through the through hole (17); the diameter of the support rod (24) is equal to the diameter of the through hole (17).

7. A fixed-point coring drill according to claim 6, characterized in that: The following method is used for sampling: in the initial state, the through hole (7) of the flip cover (8) is perpendicular to the drill body (2), the fixed-point coring drill is installed on the drilling device, and when the drilling reaches the specified depth, liquid is injected into the solution cavity (23), and then the liquid flows into the drill body (2) between the push cover structure (20) and the back cover (22), under the action of the liquid, the push cover structure (20) pushes the casing (14), the casing (14) drives the driving rack (11) to move, the moving driving rack (11) drives the gear (10) to rotate, and the gear (10) drives the flip cover (8) to rotate until the perforation (3) is parallel to the drill body (2), and the sample passes through the perforation (3) and the through hole (7) into the core storage tube (5), and the sampling is completed; After the sampling is completed, the solution is continuously injected into the solution cavity (23), and then the liquid flows into the drill body (2) between the push cover structure (20) and the rear cover (22). Under the action of the liquid, the push cover structure (20) pushes the sleeve (14), and the sleeve (14) drives the driving rack (11) to move. The moving driving rack (11) drives the gear (10) to rotate, and the gear (10) drives the flip cover (8) to rotate until the perforation (3) is perpendicular to the drill body (2), thereby closing the opening of the core storage tube (5).

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