Novel borehole cleaning tool

Abstract

The invention discloses a novel borehole cleaning tool, and belongs to the technical field of petroleum and natural gas exploration and development tools. A novel borehole cleaning tool comprises a protective sleeve and further comprises connecting sleeves fixed to the ends of the two sides of the protective sleeve. The first connector assembly is arranged on the outer side of the connecting sleeve; the second connector assembly is arranged on the outer side of the connecting sleeve on the other side, and the second connector assembly and the first connector assembly are symmetrically arranged with the protective sleeve as the center; the power assembly is arranged in the middle section in the protective sleeve; the torsion limiting assemblies are arranged at the power output ends on the two sides of the power assembly; the transmission rod is arranged at the power end of the torsion limiting assembly; according to the device, the power assembly is additionally arranged in the device, when drilling fluid flows through the screw drilling tool, the screw drilling tool rotates and generates torque, and therefore the device gets rid of the limitation of depending on drill bit power, multiple benefits are brought, the tool can operate independently, the cleaning efficiency is improved, and the device is particularly suitable for sliding drilling and other special processes.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and natural gas exploration and development tools, and in particular to a novel wellbore cleaning tool. Background Art

[0002] Wellbore cleaning is a critical step in oil and gas extraction, involving the removal of sediment, mud residue, and landslides from the borehole walls. Technological advancements have led to the emergence of new wellbore cleaning tools that incorporate advanced design concepts, significantly improving cleaning efficiency and precision. Modern wellbore cleaning tools focus not only on performance but also on durability, operability, and environmental friendliness, designed to meet the challenges of complex well conditions and promote green and sustainable development. With the deepening development of oil and gas resources, wellbore cleaning technology continues to evolve towards greater efficiency, intelligence, and environmental friendliness, promoting technological innovation and sustainable development in the industry.

[0003] A search revealed an existing patent (publication number: CN209261532U) that discloses a soft formation well drilling and reamer tool. The tool consists of a body, cutting wings, cutting teeth, and a water hole. The body has a tapered cone extending from the lower end of the cutting wings, with a guide drill bit located at the lower end. The main channel of the water hole extends downward to the guide drill bit, bypassing the water hole and introducing water into the lower end of the cutting wings. During the well drilling process, the guide end is a three-blade scraper bit that not only grinds cuttings but also provides excellent guidance. The cutting wings are inlaid with gauge guards and cutting alloy teeth, which trim the wellbore wall and maintain a regular wellbore during tool rotation. The bottom of the raised portion of the trimming end features a circular internal chamfer transition and is welded with granular welding rods. This area has poor formation cutting and grinding capabilities, effectively reducing the creation of new wellbores. The internal chamfer design also effectively prevents existing wellbores from being clogged by cuttings and mud cake. A water hole is designed at the base of the circular internal chamfer to reduce pressure on the scraper water hole and effectively clean the internal chamfer.

[0004] However, in actual use of the above solution, it needs to be installed on the drill bit for use, and only relies on the power of the drill bit to clean the inside of the wellbore, which may limit the cleaning effect, especially when the drill bit speed is low or the drilling speed is slow. Secondly, the lack of autonomous power drive makes it impossible for the tool to make flexible adjustments under complex well conditions, and the cleaning efficiency is low. At the same time, in some special drilling processes (such as sliding drilling), the drill pipe does not rotate, and this type of tool cannot be used normally. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem in the prior art that the tool needs to be installed on a drill bit for use and only relies on the power of the drill bit to clean the inside of the wellbore, which may limit the cleaning effect, and to propose a new wellbore cleaning tool.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A novel wellbore cleaning tool includes a protective sleeve and further includes:

[0008] Connecting sleeves, fixed to both ends of the protective sleeve;

[0009] A first joint assembly is arranged outside the connecting sleeve;

[0010] The second joint assembly is arranged outside the connecting sleeve on the other side and is symmetrically arranged with the first joint assembly around the protective sleeve;

[0011] A power assembly is arranged in the middle section of the protective sleeve;

[0012] Torque limiting components are provided on the power output ends on both sides of the power component;

[0013] A transmission rod is provided on the power end of the torque limiting assembly;

[0014] The transmission assembly is arranged inside the connecting sleeve, passes through the side wall of the connecting sleeve, and is connected to the end adjacent to the transmission rod;

[0015] The cleaning assembly is arranged on the outside of the connecting sleeve and drives the cleaning assembly through the transmission end of the transmission assembly;

[0016] The vibration component is arranged on the rotating end of the transmission component, and two groups are respectively arranged inside the first joint component and the second joint component.

[0017] As a preferred technical solution of the present application, the first joint assembly includes a male joint detachably connected to the end of the connecting sleeve on the side away from the second joint assembly, and a relative first wear-resistant ring is fixedly connected to the outer side of the male joint.

[0018] As a preferred technical solution of the present application, the second joint assembly includes a female joint detachably connected to the end of the connecting sleeve on the side away from the first joint assembly, and a relative second wear-resistant ring is fixedly connected to the outer side of the female joint.

[0019] As a preferred technical solution of the present application, the power assembly includes a screw motor fixed to the inner wall of the protective sleeve, and the inner side of the screw motor is rotatably connected to a motor rotor.

[0020] As a preferred technical solution of the present application, the torque limiting assembly includes a universal joint fixed on both sides of the motor rotor, the universal joint is fixedly connected to a thrust bearing at one end away from the motor rotor, the thrust bearing is fixedly connected to a torque limiter at one end away from the male joint, the torque limiter is rotatably connected to the inner wall of the protective sleeve, and the torque limiter is fixedly connected to the end of the transmission rod at one end away from the thrust bearing.

[0021] As a preferred technical solution of the present application, the transmission assembly includes a driving gear fixed to the end of the transmission rod away from the torque limiter, the driving gear is rotatably connected to the connecting sleeve, and a driven gear is rotatably connected to the inside of the side wall of the connecting sleeve, and the driven gear is meshed with the driving gear.

[0022] As a preferred technical solution of the present application, the cleaning assembly includes a V-shaped blade rotatably connected to the middle section of the outer side of the connecting sleeve, and the inner wall of the V-shaped blade is fixedly connected to a gear ring, which is meshed with the driven gear.

[0023] As a preferred technical solution of the present application, the inner wall of the V-shaped blade is provided with support bearings on two opposite sides, the outer ring of the support bearing is fixedly connected to the inner wall of the V-shaped blade, and the inner ring of the support bearing is fixedly connected to the outer wall of the connecting sleeve.

[0024] As a preferred technical solution of the present application, the vibration assembly includes an eccentric rotor fixed to the end of the driving gear away from the transmission rod, and the end of the eccentric rotor away from the driving gear is rotatably connected to a support frame, and the support frames on both sides are respectively fixedly connected to the inner walls of the male connector and the female connector.

[0025] As a preferred technical solution of the present application, the protective sleeve, the connecting sleeve and the male connectors and the female connectors on both sides are connected.

[0026] Compared with the prior art, the present invention provides a new wellbore cleaning tool with the following beneficial effects:

[0027] 1. The novel wellbore cleaning tool described in the present invention incorporates a power assembly, enabling the device to utilize the drilling fluid flowing through the screw drill to generate torque, thereby breaking away from the limitation of relying on drill bit power. This provides multiple benefits. The tool can operate independently, improving cleaning efficiency and being particularly suitable for special processes such as sliding drilling. At the same time, it reduces dependence on the drill bit, reduces wear, improves drilling efficiency and stability, extends tool life, reduces maintenance costs, and enhances operational safety.

[0028] 2. The novel wellbore cleaning tool described in the present invention, by adding a torque limiting component during the device's power transmission process, can effectively protect the equipment, prevent damage due to overload operation, and extend its service life. At the same time, the torque limiting component improves operational stability, ensures that the tool operates within the optimal torque range, optimizes work efficiency, and avoids energy waste. In addition, it reduces operational risks, especially in complex well conditions, ensuring operational safety. By reducing the risk of equipment wear and damage, the torque limiting component helps reduce maintenance costs and improves tool reliability and durability.

[0029] 3. The novel wellbore cleaning tool described in this invention incorporates a vibration assembly on the outside of the transmission assembly, providing the device with a certain amplitude of vibration, significantly improving cleaning effectiveness and operational efficiency. The vibration assembly helps break up deposits or blockages on the wellbore wall, enhancing cleaning capabilities and improving the tool's penetration, ensuring efficient operation even in complex wellbore conditions. Furthermore, vibration helps reduce adhesion between the tool and the wellbore wall, reducing the risk of drill sticking. The combined effects of the vibration and transmission assembly enable faster wellbore cleaning, reducing operation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a perspective view of the present invention;

[0031] Figure 2 is a cross-sectional view of a V-shaped blade of the present invention;

[0032] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0033] Figure 4 It is a cross-sectional view and an enlarged view of the connecting sleeve of the present invention. Figure 1 and zoom Figure 2 ;

[0034] Figure 5 It is a cross-sectional view and an enlarged view of the protective sleeve of the present invention;

[0035] Figure 6 yes Figure 5 Enlarged view of point C in the middle;

[0036] Figure 7 is a cross-sectional view of the screw motor of the present invention;

[0037] Figure 8 It is a partial three-dimensional schematic diagram of the present invention.

[0038] In the picture:

[0039] 1. Protective sleeve; 11. Connecting sleeve; 12. Male connector; 13. First wear-resistant ring; 14. Female connector; 15. Second wear-resistant ring; 2. Screw motor; 21. Universal joint; 22. Thrust bearing; 23. Torque limiter; 24. Transmission rod; 25. Driving gear; 26. Driven gear; 27. Support bearing; 28. Motor rotor; 3. V-blade; 31. Gear ring; 4. Eccentric rotor; 41. Support frame. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] Example:

[0042] Reference Figure 1-8 A novel wellbore cleaning tool comprises a protective sleeve 1 and further comprises:

[0043] The connecting sleeves 11 are fixed to the ends of both sides of the protective sleeve 1, and the protective sleeve 1 simultaneously supports and fixes the connecting sleeves 11 on both sides;

[0044] A first joint assembly is provided outside the connecting sleeve 11;

[0045] The second joint assembly is arranged outside the connecting sleeve 11 on the other side and is symmetrically arranged with the first joint assembly with the protective sleeve 1 as the center. The first joint assembly and the second joint assembly are supported and limited by the connecting sleeves 11 on both sides respectively;

[0046] The power assembly is arranged in the middle section of the protective sleeve 1, and the protective sleeve 1 protects the power assembly;

[0047] The torque limiting assembly is provided on the power output ends on both sides of the power assembly, is connected to the torque limiting assembly through the power assembly, and drives the torque limiting assembly to rotate;

[0048] The transmission rod 24 is provided on the power end of the torque limiting assembly. The torque limiting assembly connects the output end of the power assembly and the transmission rod 24, and controls the torque between the power end and the transmission rod 24 within a certain range, thereby protecting the equipment.

[0049] The transmission assembly is arranged inside the connecting sleeve 11 and passes through the side wall of the connecting sleeve 11. At the same time, it is connected to the end adjacent to the transmission rod 24. The torque limiting assembly and the transmission assembly are connected through the transmission rod 24.

[0050] The cleaning assembly is arranged outside the connecting sleeve 11 and is driven by the transmission end of the transmission assembly. The cleaning assembly is driven by the transmission assembly to rotate outside the connecting sleeve 11, thereby cleaning the inside of the wellbore;

[0051] The vibration component is arranged on the rotating end of the transmission component, and two groups are respectively arranged inside the first joint component and the second joint component. The vibration component rotates inside the device to generate vibration, so that the entire device vibrates.

[0052] The first joint assembly includes a male joint 12 detachably connected to the end of the connecting sleeve 11 on the side away from the second joint assembly, and a first wear-resistant ring 13 is fixedly connected to the outer side of the male joint 12.

[0053] The second joint assembly includes a female joint 14 which is detachably connected to the end of the connecting sleeve 11 on the side away from the first joint assembly. A relative second wear-resistant ring 15 is fixedly connected to the outside of the female joint 14. The first joint assembly and the second joint assembly are supported by the connecting sleeves 11 on both sides. At the same time, the first joint assembly and the second joint assembly are arranged to be detachably connected to the connecting sleeve 11, so that the equipment can be disassembled, the volume of the device can be reduced, and transportation is convenient.

[0054] The power assembly includes a screw motor 2 fixed on the inner wall of the protective sleeve 1. The motor rotor 28 is rotatably connected to the inside of the screw motor 2. The screw motor 2 is supported and fixed by the protective sleeve 1, and the motor rotor 28 is limited by the screw motor 2 so that the motor rotor 28 can rotate inside the screw motor 2, thereby generating torque and converting it into power to drive the equipment.

[0055] The torque limiting assembly includes a universal joint 21 fixed on both sides of the motor rotor 28, and the universal joint 21 is supported and fixed by the motor rotor 28, thereby supporting and fixing the universal joint 21 through the motor rotor 28. A thrust bearing 22 is fixedly connected to the end of the universal joint 21 away from the motor rotor 28, and the thrust bearing 22 is supported and fixed by the universal joint 21. The main function of the thrust bearing 22 is to bear axial load and limit axial displacement to ensure the stability and precise positioning of the shaft. It reduces friction and wear by providing a smooth supporting surface, thereby extending the service life of the equipment. The thrust bearing 22 can effectively withstand axial force, improve the operating efficiency and stability of the mechanical system, and ensure precise control of the equipment in the axial direction. The end of the bearing 22 away from the male connector 12 is fixedly connected to a torque limiter 23, and the torque limiter 23 is fixed by the thrust bearing 22. The main function of the thrust bearing 22 is to protect the transmission system from overload damage. When the torque exceeds the set range, it will automatically disconnect or slide to prevent equipment damage. It effectively protects the drive device and load, extends the life of the equipment, improves the stability of the system, and has an automatic reset function to reduce manual intervention. The torque limiter 23 is rotatably connected to the inner wall of the protective sleeve 1, and the torque limiter 23 is limited by the protective sleeve 1. The torque limiter 23 is fixedly connected to the end of the transmission rod 24 away from the thrust bearing 22, and the transmission rod 24 is supported and fixed by the torque limiter 23 while transmission is performed.

[0056] The transmission assembly includes a driving gear 25 fixed to the end of the transmission rod 24 on the side away from the torque limiter 23. The driving gear 25 is fixed by the transmission rod 24, and the driving gear 25 is driven to rotate by the transmission rod 24. The driving gear 25 is rotationally connected to the connecting sleeve 11, and the driving gear 25 is limited by the connecting sleeve 11. A driven gear 26 is rotatably connected to the inside of the side wall of the connecting sleeve 11, and the driven gear 26 is limited by the connecting sleeve 11 so that the driven gear 26 can rotate on the inner wall of the connecting sleeve 11. The driven gear 26 is meshed and connected with the driving gear 25, and the driven gear 26 is driven to rotate by the driving gear 25.

[0057] The cleaning assembly includes a V-shaped blade 3 rotatably connected to the middle section of the outer side of the connecting sleeve 11, and the V-shaped blade 3 is supported and limited by the connecting sleeve 11. A gear ring 31 is fixedly connected to the inner wall of the V-shaped blade 3, and the gear ring 31 is fixed by the V-shaped blade 3. The gear ring 31 is meshed with the driven gear 26, and the driven gear 26 drives the gear ring 31 to rotate, and at the same time, the gear ring 31 drives the V-shaped blade 3 to rotate.

[0058] The inner wall of the V-shaped blade 3 is provided with support bearings 27 on both sides opposite to each other. The outer ring of the support bearing 27 is fixedly connected to the inner wall of the V-shaped blade 3, and the inner ring of the support bearing 27 is fixedly connected to the outer wall of the connecting sleeve 11. The support bearing 27 is used to rotate between the V-shaped blade 3 and the connecting sleeve 11, thereby reducing the friction between the V-shaped blade 3 and the connecting sleeve 11.

[0059] The vibration assembly includes an eccentric rotor 4 fixed to the end of the driving gear 25 on the side away from the transmission rod 24. The eccentric rotor 4 is fixed by the driving gear 25. At the same time, the eccentric rotor 4 is driven to rotate synchronously by the driving gear 25 when rotating, so that vibration is generated by the rotation of the eccentric rotor 4 itself. The end of the eccentric rotor 4 on the side away from the driving gear 25 is rotatably connected to a support frame 41, and the other end of the eccentric rotor 4 is supported by the support frame 41. The support frames 41 on both sides are fixedly connected to the inner walls of the male connector 12 and the female connector 14 respectively.

[0060] The protective sleeve 1, the connecting sleeve 11 and the male connector 12 and the female connector 14 on both sides are connected. By setting the protective sleeve 1, the connecting sleeve 11, the male connector 12 and the female connector 14 in a through-type manner, the drilling fluid can flow from one end of the male connector 12 to one end of the female connector 14, driving the motor rotor 28 to rotate in the process.

[0061] Specifically, when the new wellbore cleaning tool is working:

[0062] First, the male connector 12 and the female connector 14 are connected to the drill pipe and the drill bit respectively, and the external drilling fluid is transported through the male connector 12 to the inside of the protective sleeve 1 and the connecting sleeve 11, driving the motor rotor 28 to rotate during the process;

[0063] The motor rotor 28 drives the thrust bearing 22, the torque limiter 23 and the transmission rod 24 to rotate synchronously via the universal joint 21;

[0064] The main function of the thrust bearing 22 is to bear axial loads and limit axial displacement, ensuring shaft stability and precise positioning. By providing a smooth support surface, it reduces friction and wear, thereby extending the service life of the equipment. The thrust bearing 22 can effectively withstand axial forces, improve the operating efficiency and stability of the mechanical system, and ensure precise control of the equipment in the axial direction.

[0065] The main function of the torque limiter 23 is to protect the transmission system from overload damage. When the torque exceeds the set range, it will automatically disconnect or slide to prevent equipment damage. It effectively protects the drive device and load, extends the life of the equipment, improves system stability, and has an automatic reset function to reduce manual intervention.

[0066] The driving gear 25 is driven to rotate by the transmission rod 24, thereby driving the driven gear 26 to rotate through the driving gear 25, and the driven gear 26 drives the V-shaped blade 3 to rotate outside the connecting sleeve 11 through the gear ring 31, thereby cleaning the inside of the wellbore through the V-shaped blade 3;

[0067] During the rotation of the driving gear 25 , the eccentric rotor 4 is driven to rotate inside the male connector 12 and the female connector 14 , thereby generating an amplitude, thereby driving the device to vibrate and improving the cleaning efficiency.

[0068] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A new wellbore cleaning tool, comprising a protective sleeve (1), characterized in that: Also includes: A connecting sleeve (11) is fixed to both side ends of the protective sleeve (1); A first joint assembly is arranged outside the connecting sleeve (11); The second joint assembly is arranged outside the connecting sleeve (11) on the other side and is symmetrically arranged with the first joint assembly with the protective sleeve (1) as the center; A power assembly is arranged in the middle section of the protective sleeve (1); Torque limiting components are provided on the power output ends on both sides of the power component; A transmission rod (24) is provided on the power end of the torque limiting assembly; A transmission assembly is arranged inside the connecting sleeve (11), penetrates the side wall of the connecting sleeve (11), and is connected to the adjacent end of the transmission rod (24); A cleaning assembly is arranged outside the connecting sleeve (11) and drives the cleaning assembly through the transmission end of the transmission assembly; The vibration component is arranged on the rotating end of the transmission component, and two groups are respectively arranged inside the first joint component and the second joint component.

2. A new wellbore cleaning tool according to claim 1, characterized in that: The first joint assembly comprises a male joint (12) detachably connected to the end of a connecting sleeve (11) on a side away from the second joint assembly, and a first wear-resistant ring (13) is fixedly connected to the outer side of the male joint (12).

3. A new wellbore cleaning tool according to claim 2, characterized in that: The second joint assembly comprises a female joint (14) detachably connected to the end of the connecting sleeve (11) on a side away from the first joint assembly, and a second wear-resistant ring (15) is fixedly connected to the outer side of the female joint (14).

4. A new wellbore cleaning tool according to claim 3, characterized in that: The power assembly comprises a screw motor (2) fixed to the inner wall of the protective sleeve (1), and a motor rotor (28) is rotatably connected to the inner side of the screw motor (2).

5. A new wellbore cleaning tool according to claim 4, characterized in that: The torque limiting assembly includes a universal shaft (21) fixed on both sides of the motor rotor (28), the universal shaft (21) is fixedly connected to a thrust bearing (22) at one end away from the motor rotor (28), the thrust bearing (22) is fixedly connected to a torque limiter (23) at one end away from the male connector (12), the torque limiter (23) is rotatably connected to the inner wall of the protective sleeve (1), and the torque limiter (23) is fixedly connected to the end of the transmission rod (24) at one end away from the thrust bearing (22).

6. A new wellbore cleaning tool according to claim 1, characterized in that: The transmission assembly includes a driving gear (25) fixed to an end portion of a transmission rod (24) away from a torque limiter (23), the driving gear (25) being rotatably connected to a connecting sleeve (11), a driven gear (26) being rotatably connected inside a side wall of the connecting sleeve (11), and the driven gear (26) being meshed with the driving gear (25).

7. A new wellbore cleaning tool according to claim 6, characterized in that: The cleaning assembly comprises a V-shaped blade (3) rotatably connected to the middle section of the outer side of the connecting sleeve (11); a gear ring (31) is fixedly connected to the inner wall of the V-shaped blade (3); and the gear ring (31) is meshedly connected to the driven gear (26).

8. A new wellbore cleaning tool according to claim 7, characterized in that: The inner wall of the V-shaped blade (3) is provided with supporting bearings (27) on two opposite sides, the outer ring of the supporting bearing (27) is fixedly connected to the inner wall of the V-shaped blade (3), and the inner ring of the supporting bearing (27) is fixedly connected to the outer wall of the connecting sleeve (11).

9. A new wellbore cleaning tool according to claim 8, characterized in that: The vibration assembly comprises an eccentric rotor (4) fixed to the end of the driving gear (25) away from the transmission rod (24); the end of the eccentric rotor (4) away from the driving gear (25) is rotatably connected to a support frame (41); the support frames (41) on both sides are respectively fixedly connected to the inner walls of the male connector (12) and the female connector (14).

10. A new wellbore cleaning tool according to any one of claim 1, characterized in that: The protective sleeve (1), the connecting sleeve (11), and the male connectors (12) and the female connectors (14) on both sides are connected.

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