Local reverse circulation drilling device capable of achieving wire-line coring
By designing a wireline coring local reverse circulation drilling device, combined with anti-clogging and wireline coring mechanisms, the problems of easily broken rock cores and easily clogged rock cuttings were solved, achieving efficient core extraction and stability of the drilling process, reducing costs and improving equipment reliability.
Patent Information
- Application Number
- CN202520314031.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-02-26
AI Technical Summary
In complex formations, wireline coring technology is prone to core breakage or blockage, while in reverse circulation drilling technology, cuttings tend to accumulate and cause channel blockage. The two technologies, when used independently, lack effective integration, which affects drilling efficiency and core quality.
Design a partial reverse circulation drilling device for wireline coring, including an anti-clogging mechanism and a wireline coring mechanism. A waterproof motor drives the rotating drill rod and stirring blades, and gear transmission drives the rotation of the drill rod and stirring blades to prevent rock cuttings or rock core from clogging. The rock core is then rapidly extracted through a mud pump and steel cable system.
It effectively prevents rock cuttings or core blockage, ensures drilling stability, improves core sampling efficiency and quality, reduces downtime for maintenance, lowers drilling costs, and enhances equipment durability and reliability.
Smart Images
Figure CN223767462U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drilling engineering technology, and more specifically, to a device for partial reverse circulation drilling that enables wireline coring. Background Technology
[0002] In geological exploration and drilling operations, wireline coring and reverse circulation drilling are two commonly used and efficient drilling methods. Wireline coring extracts rock cores using a wire rope, eliminating the need to lift the drill string and significantly improving core extraction efficiency. Reverse circulation drilling, on the other hand, changes the flow direction of the drilling media, carrying rock cuttings or cores to the surface through the central channel of the drill pipe, reducing sample contamination and loss. However, both technologies still face some technical challenges in practical applications, limiting their further promotion and application.
[0003] Wireline coring technology has the advantage of high-efficiency coring, but in complex formations, rock cores are easily broken or clogged in the coring tube, leading to coring failure or reduced efficiency. Although reverse circulation drilling technology can effectively solve the problem of cuttings removal, during the drilling process, rock cuttings or rock cores are prone to accumulate in the reverse circulation channel, causing channel blockage and affecting drilling efficiency and coring quality. At the same time, wireline coring technology and reverse circulation drilling technology are usually used independently and lack effective integration. Therefore, a device for partial reverse circulation drilling that can realize wireline coring is proposed. Utility Model Content
[0004] In order to overcome the problems and defects in the prior art, this utility model provides a device for partial reverse circulation drilling that can realize wireline coring, so as to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a device for partial reverse circulation drilling of wireline coring, comprising a drill bit, a drill rod fixedly connected to the top of the drill bit, a reverse circulation hole opened on the bottom surface of the drill bit, and an anti-clogging mechanism provided between the drill bit and the drill rod;
[0006] The anti-clogging mechanism includes a first fixing plate, which is fixed inside the drill rod. A connecting column is fixedly connected between the first fixing plate and the inner wall of the drill rod. A waterproof motor is fixedly installed at the bottom of the first fixing plate. A first gear is fixedly connected to the output end of the waterproof motor. Second gears mesh on both sides of the first gear. A rotating drill rod is fixedly sleeved on the outside of the second gear. A stirring blade is fixedly connected to the outside of the rotating drill rod. A connecting plate is rotatably connected to the top of the rotating drill rod. The connecting plate is fixed inside the drill rod. A rope coring mechanism is provided inside the drill rod.
[0007] Preferably, the wireline coring mechanism includes a mud pump, which is fixedly installed inside the drill pipe, with a mud pumping pipe fixedly connected to the bottom of the mud pump and a connecting pipe fixedly connected to the top of the mud pump.
[0008] Preferably, the top of the connecting pipe is fixedly connected to a core sampling container, and the top of the core sampling container is fixedly connected to a steel rope.
[0009] Preferably, a take-up roller is fixedly connected to the top of the steel rope, and a rotating shaft is fixedly connected inside the take-up roller. A second fixing plate is fixedly connected to both ends of the rotating shaft.
[0010] Preferably, the rotating shaft is rotatably connected to the second fixed plate, a motor is fixedly installed on one side of the second fixed plate, and the output end of the motor is fixedly connected to the rotating shaft.
[0011] Preferably, a top plate is fixedly connected to the top of the second fixing plate, and a support column is fixedly connected to the bottom of the top plate.
[0012] Preferably, a support plate is fixedly connected to the bottom of the support column, and one side of the support plate is fixedly connected to the drill rod.
[0013] Preferably, the bottom of the rotary drill rod passes through the drill bit and extends into the reverse circulation hole.
[0014] The technical effects and advantages of this utility model are as follows:
[0015] By setting up an anti-clogging mechanism and a wireline coring mechanism, the waterproof motor drives the rotating drill rod and stirring blades to rotate through gear transmission, actively stirring the rock cuttings or rock cores entering the reverse circulation hole and drill rod, preventing them from accumulating and clogging the reverse circulation channel, ensuring continuous and stable operation of the local reverse circulation, reducing downtime maintenance time caused by blockage, and the mud pump extracts mud containing rock cores and transports it to the coring tank. Through the cooperation of steel rope, winding roller and motor, the lifting and lowering of the coring tank can be realized conveniently and quickly, and the rock core can be extracted without lifting the drill, which greatly improves the coring efficiency and saves drilling costs. The combination of wireline coring and local reverse circulation drilling improves drilling efficiency and coring quality.
[0016] By setting up a stable support structure consisting of a second fixed plate, a top plate, a support column, and a support plate, the stability of the mechanism during core sampling is ensured, reducing shaking and malfunctions, and improving the durability and reliability of the equipment. The reverse circulation hole design at the bottom of the drill bit, combined with the pressure difference and flow of the fluid, allows rock cuttings or rock cores to quickly enter the drill pipe and flow upwards for discharge, effectively solving the problem of rock cuttings blockage, ensuring a smooth drilling process, and improving drilling efficiency. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0018] Figure 2 This is a bottom view of the structure of this utility model.
[0019] Figure 3 This is a front cross-sectional view of the present invention.
[0020] Figure 4 This is a schematic diagram of the internal structure of the drill bit of this utility model.
[0021] Figure 5 This is a partial structural diagram of the drill pipe of this utility model.
[0022] The attached diagram is labeled as follows: 1. Drill bit; 2. Drill rod; 3. Reverse circulation hole; 4. First fixing plate; 5. Connecting column; 6. Waterproof motor; 7. First gear; 8. Second gear; 9. Rotating drill rod; 10. Agitator blade; 11. Connecting plate; 12. Mud pump; 13. Mud suction pipe; 14. Connecting pipe; 15. Core sampling tank; 16. Steel rope; 17. Rewinding roller; 18. Rotating shaft; 19. Second fixing plate; 20. Motor; 21. Top plate; 22. Support column; 23. Support plate. Detailed Implementation
[0023] 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.
[0024] As attached Figure 1-5 The device shown is a partial reverse circulation drilling device for wireline coring, including a drill bit 1, a drill rod 2 fixedly connected to the top of the drill bit 1, a reverse circulation hole 3 opened on the bottom surface of the drill bit 1, and an anti-clogging mechanism provided between the drill bit 1 and the drill rod 2.
[0025] The anti-clogging mechanism includes a first fixing plate 4, which is fixed inside the drill rod 2. A connecting column 5 is fixedly connected between the first fixing plate 4 and the inner wall of the drill rod 2. A waterproof motor 6 is fixedly installed at the bottom of the first fixing plate 4. A first gear 7 is fixedly connected to the output end of the waterproof motor 6. Second gears 8 are meshed on both sides of the first gear 7. A rotating drill rod 9 is fixedly sleeved on the outside of the second gear 8. A stirring blade 10 is fixedly connected to the outside of the rotating drill rod 9. A connecting plate 11 is rotatably connected to the top of the rotating drill rod 9. The connecting plate 11 is fixed inside the drill rod 2. A rope core sampling mechanism is provided inside the drill rod 2.
[0026] As attached Figure 3-5As shown, the wireline coring mechanism includes a mud pump 12, which is fixedly installed inside the drill pipe 2. A mud pumping pipe 13 is fixedly connected to the bottom of the mud pump 12, and a connecting pipe 14 is fixedly connected to the top of the mud pump 12. A coring tank 15 is fixedly connected to the top of the connecting pipe 14, and a steel rope 16 is fixedly connected to the top of the coring tank 15 to facilitate the extraction of rock cores into the connecting pipe 14.
[0027] As attached Figure 1-3 As shown, a winding roller 17 is fixedly connected to the top of the steel rope 16. A rotating shaft 18 is fixedly connected inside the winding roller 17. A second fixing plate 19 is fixedly connected to both ends of the rotating shaft 18. The rotating shaft 18 and the second fixing plate 19 are rotatably connected. A motor 20 is fixedly installed on one side of the second fixing plate 19. The output end of the motor 20 is fixedly connected to the rotating shaft 18, so that the rotating shaft 18 can be driven by the motor 20 to rotate and wind up the steel rope 16, thereby facilitating the removal of the core collection tank 15 and the extraction of the collected rock core.
[0028] As attached Figure 1-3 As shown, a top plate 21 is fixedly connected to the top of the second fixed plate 19, a support column 22 is fixedly connected to the bottom of the top plate 21, a support plate 23 is fixedly connected to the bottom of the support column 22, and one side of the support plate 23 is fixedly connected to the drill rod 2, which facilitates the support and fixation of the rotating shaft 18 and the winding roller 17.
[0029] As attached Figure 3 , 4 As shown, the bottom of the rotating drill rod 9 passes through the drill bit 1 and extends into the reverse circulation hole 3, further preventing the reverse circulation hole 3 from becoming blocked and affecting the core sampling effect.
[0030] The working principle of this utility model is as follows: During drilling, the drill rod 2 drives the drill bit 1 to rotate, breaking up the formation. Drilling fluid or gas flows downward through the annulus between the drill rod 2 and the borehole wall, reaching the drill bit 1. A reverse circulation hole 3 is opened on the bottom surface of the drill bit 1. Under the pressure difference and flow action of the fluid, rock cuttings or rock cores enter the interior of the drill rod 2 from the reverse circulation hole 3 and flow upward through the central channel of the drill rod 2 to achieve local reverse circulation.
[0031] The anti-clogging mechanism is activated. The waterproof motor 6 is fixed to the first fixed plate 4, which is fixed to the inner wall of the drill rod 2 via the connecting column 5. The output end of the waterproof motor 6 drives the first gear 7 to rotate. The first gear 7 meshes with the second gear 8 on both sides, thereby driving the rotating drill rod 9, which is fixedly sleeved on the outside of the second gear 8, to rotate. The stirring blade 10 on the outside of the rotating drill rod 9 rotates with the rotating drill rod 9, stirring the rock cuttings or rock cores entering the reverse circulation hole 3 and the drill rod 2 to prevent clogging. The top of the rotating drill rod 9 is rotatably connected to the connecting plate 11, which is fixed inside the drill rod 2. The bottom of the rotating drill rod 9 passes through the drill bit 1 and extends into the reverse circulation hole 3. The mud pump 12 is fixedly installed inside the drill rod 2 and extracts rock cuttings or rock cores through the mud suction pipe 13. The mud pump 12 pumps the extracted mud to the core retrieval tank 15 through the connecting pipe 14. The steel rope 16 is connected to the core retrieval tank 15, and the top of the steel rope 16 is connected to the winding roller 17. The winding roller 17 is fixedly connected to the rotating shaft 18 inside, and the two ends of the rotating shaft 18 are fixedly connected to the second fixed plate 19. The motor 20 is fixed to one side of the second fixed plate 19. The output end of the motor 20 drives the rotating shaft 18 to rotate, thereby causing the winding roller 17 to wind or unwind the steel rope 16, realizing the lifting and lowering of the core retrieval tank 15, and completing the rope core retrieval. The top of the second fixed plate 19 is fixedly connected to the top plate 21, and the bottom of the top plate 21 is fixedly connected to the support plate 23 through the support column 22. One side of the support plate 23 is fixedly connected to the drill rod 2, which plays the role of supporting and stabilizing the rope core retrieval mechanism.
[0032] In conclusion, the above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.
Claims
1. A device for enabling rope core partial reverse circulation drilling, comprising a drill bit (1), characterised in that: The drill bit (1) top fixedly connected with drill pipe (2), the drill bit (1) bottom surface is provided with anti-circulation hole (3), the drill bit (1) and drill pipe (2) between the anti-clogging mechanism is provided with; The anti-clogging mechanism includes a first fixed plate (4), the first fixed plate (4) is fixed in the drill pipe (2), the first fixed plate (4) and the inner wall of the drill pipe (2) are fixedly connected with the connecting column (5), the first fixed plate (4) bottom is fixedly installed with waterproof motor (6), the waterproof motor (6) output is fixedly connected with first gear (7), the first gear (7) both sides are engaged with second gear (8), the second gear (8) outside is fixedly provided with rotating drill pipe (9), the rotating drill pipe (9) outside is fixedly connected with stirring blade (10), the rotating drill pipe (9) top rotatably connected with connecting plate (11), the connecting plate (11) is fixed in the drill pipe (2), the drill pipe (2) is provided with rope core taking mechanism.
2. The implementable rope core partial reverse circulation drilling apparatus of claim 1, wherein: The rope core taking mechanism includes a mud pump (12), the mud pump (12) is fixedly installed in the drill pipe (2), the mud pump (12) bottom is fixedly connected with mud pipe (13), the mud pump (12) top is fixedly connected with connecting pipe (14).
3. The implementable rope core partial reverse circulation drilling apparatus of claim 2, wherein: The connecting pipe (14) top is fixedly connected with core taking tank (15), the core taking tank (15) top is fixedly connected with steel wire rope (16).
4. The implementable rope core partial reverse circulation drilling apparatus of claim 3, wherein: The steel wire rope (16) top is fixedly connected with winding roller (17), the winding roller (17) is fixedly connected with rotating shaft (18) inside, the rotating shaft (18) both ends are fixedly connected with second fixed plate (19).
5. The implementable rope core partial reverse circulation drilling apparatus of claim 4, wherein: The rotating shaft (18) and the second fixed plate (19) are rotatably connected, the second fixed plate (19) one side is fixedly installed with motor (20), the motor (20) output and the rotating shaft (18) between fixedly connected.
6. The implementable rope core partial reverse circulation drilling apparatus of claim 4, wherein: The second fixed plate (19) top is fixedly connected with top plate (21), the top plate (21) bottom is fixedly connected with support column (22).
7. The implementable rope core partial reverse circulation drilling apparatus of claim 6, wherein: The support column (22) bottom is fixedly connected with support plate (23), the support plate (23) one side and the drill pipe (2) between fixedly connected.
8. The implementable rope core partial reverse circulation drilling apparatus of claim 1, wherein: The rotating drill pipe (9) bottom penetrates the drill bit (1) and extends to the anti-circulation hole (3) inside.