Underground stress distribution bearing

Abstract

The invention relates to the technical field of bearings, in particular to an underground stress distribution bearing which comprises an inner ring and an outer ring, a rolling assembly is connected between the inner ring and the outer ring, a dustproof assembly is arranged on the inner wall of the outer ring, heat dissipation assemblies are arranged on the front side and the rear side of the inner ring, and each heat dissipation assembly comprises an annular heat conduction piece and an annular heat dissipation fin. The front face and the back face of the inner ring are fixedly connected with annular heat conduction pieces, annular heat dissipation fins are fixedly installed on the outer sides of the annular heat conduction pieces, and heat conduction assemblies are arranged on the front face and the back face of the outer ring. The heat dissipation device is reasonable and compact in structure and convenient to use, the annular heat dissipation fins and the inner ring rotate together, the annular heat dissipation fins make full contact with air to dissipate heat, heat generated by the inner ring can be dissipated in time, stress distribution is not prone to being changed due to overheating, faults are reduced, and the service life is prolonged.

Description

Technical Field

[0001] This invention relates to the field of bearing technology, specifically a stress distribution bearing for downhole applications. Background Technology

[0002] Downhole bearings are specialized bearings designed specifically for downhole power drilling tools, capable of operating under extreme conditions. These bearings must withstand harsh conditions such as high loads, impacts, friction, and corrosion, as they are crucial for ensuring smooth drilling operations. Commonly used bearings in downhole power drilling tools include thrust bearings and centralizing bearings. Thrust bearings are primarily used to connect the stationary drill string to the rotating drive shaft, while centralizing bearings are used to support and guide the drill string.

[0003] The current centralizing bearings commonly used in downhole power drilling tools need to withstand large frictional forces during use, which causes them to overheat. At the same time, the operating environment is not conducive to heat dissipation, which can easily lead to stress distribution being affected by high temperatures, increasing the failure rate and shortening the service life. Therefore, improvements are needed. Summary of the Invention

[0004] This invention provides a bearing with stress distribution for downhole applications, which overcomes the shortcomings of the prior art and can effectively solve the problem of high failure rate and shortened service life caused by overheating and untimely heat dissipation in existing normalizing bearings.

[0005] The technical solution of the present invention is achieved through the following measures: a bearing for stress distribution in downhole applications, comprising an inner ring and an outer ring, wherein a rolling assembly is connected between the inner ring and the outer ring, a dustproof assembly is provided on the inner wall of the outer ring, and heat dissipation assemblies are provided on the front and rear sides of the inner ring, wherein the heat dissipation assemblies include annular heat-conducting plates and annular heat dissipation fins, annular heat-conducting plates are fixedly connected to the front and back sides of the inner ring, annular heat dissipation fins are fixedly installed on the outer side of the annular heat-conducting plates, and heat-conducting assemblies are provided on the front and back sides of the outer ring.

[0006] The following are further optimizations and / or improvements to the above-mentioned technical solution: Preferably, the annular heat-conducting sheet is a copper ring, and the annular heat dissipation fins are aluminum rings with several fins on the top surface.

[0007] Preferably, the heat-conducting component includes a heat-conducting groove and a silicone grease layer. The front and rear sides of the outer ring are provided with heat-conducting grooves with outward openings. The heat-conducting grooves are filled with a silicone grease layer. A heat-conducting ring is placed inside the heat-conducting groove and is attached to the silicone grease layer. Several heat-conducting pipes are fixedly installed on the top surface of the heat-conducting ring along the circumference. The other end of the heat-conducting pipes is fixedly connected to the top surface of the annular heat-conducting sheet.

[0008] Preferably, the dustproof assembly includes a dustproof cover and a retaining ring. The dustproof cover is an annular cover, and the outer surface of the dustproof cover is snapped onto the inner side of the outer ring. A retaining ring is fixedly connected to the rear side of the inner ring of the dustproof cover. A sealing groove is installed on the outer side of the inner ring. The sealing groove has an annular inlet that opens forward. The sealing groove is filled with lubricating oil, and the retaining ring is inserted into the sealing groove through the annular inlet.

[0009] Preferably, the rolling assembly includes a cage and rolling elements. The cage has several through mounting holes, and rolling elements are movably connected to each mounting hole. The cage is engaged with the inner and outer rings respectively through the rolling elements. Lubrication components are provided on the front and inside of the cage.

[0010] Preferably, the lubrication assembly includes an oil supply pipe and a sealing plug. The cage has an oil groove, and each mounting port has an oil outlet hole on its inner side, which communicates with the inside of the oil groove. The front end of the oil supply pipe passes through a dust cover, and the front part of the oil supply pipe is threaded with a sealing plug. The rear end of the oil supply pipe passes through the cage and communicates with the oil groove.

[0011] The present invention has a reasonable and compact structure and is easy to use. Its annular heat dissipation fins rotate together with the inner ring, so that the annular heat dissipation fins can fully contact the air to dissipate heat. This allows the heat generated by the inner ring to be dissipated in time, preventing overheating and changes in stress distribution, reducing failures and extending service life. Attached Figure Description

[0012] Appendix Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention.

[0013] Appendix Figure 2 This is a three-dimensional structural diagram of the present invention without the dustproof plate installed.

[0014] Appendix Figure 3 This is a cross-sectional three-dimensional structural diagram of the heat conduction groove.

[0015] Appendix Figure 4 For the appendix Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0016] Appendix Figure 5 This is a schematic diagram of the three-dimensional structure of the dust cover.

[0017] Appendix Figure 6 A schematic diagram of the three-dimensional structure of the cage.

[0018] Appendix Figure 7 A cross-sectional three-dimensional structural diagram of the cage.

[0019] The codes in the attached diagram are as follows: 1 is the inner ring, 2 is the outer ring, 3 is the annular heat-conducting fin, 4 is the annular heat dissipation fin, 5 is the heat-conducting groove, 6 is the silicone grease layer, 7 is the heat-conducting pipe, 8 is the cage, 9 is the rolling element, 10 is the dust cover, 11 is the sealing groove, 12 is the insertion ring, 13 is the annular insertion port, 14 is the oil groove, 15 is the sealing plug, 16 is the oil outlet, 17 is the oil supply pipe, and 18 is the heat-conducting ring. Detailed Implementation

[0020] The present invention is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present invention and the actual situation.

[0021] In this invention, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as front, back, top, bottom, left, right, etc. The positional relationships are determined based on the layout direction of the attached diagram in the instruction manual.

[0022] The present invention will be further described below with reference to embodiments and accompanying drawings: Example 1: As shown in the attached document Figure 1-7 As shown, the downhole bearing with stress distribution includes an inner ring 1 and an outer ring 2. A rolling assembly connects the inner ring 1 and the outer ring 2. A dustproof assembly is provided on the inner wall of the outer ring 2. Heat dissipation assemblies are provided on the front and rear sides of the inner ring 1. The heat dissipation assemblies include annular heat-conducting plates 3 and annular heat dissipation fins 4. Annular heat-conducting plates 3 are fixedly connected to the front and back sides of the inner ring 1. Annular heat dissipation fins 4 are fixedly installed on the outer side of the annular heat-conducting plates 3. Heat-conducting assemblies are provided on the front and back sides of the outer ring 2.

[0023] During use, the inner ring 1 is connected to the shaft of the downhole power drill bit, and the outer ring 2 is fixed. When the downhole power drill bit rotates, the inner ring 1 will rotate along with it, causing the annular heat dissipation fins 4 to rotate as well, allowing them to fully contact the air for heat dissipation. This ensures that the heat generated by the inner ring 1 can be dissipated in a timely manner, reducing the problem of high failure rate and shortened service life caused by overheating. The gap between the inner ring 1 and the outer ring 2 is sealed by a dustproof component, and the heat of the outer ring 2 is transferred to the annular heat-conducting fins 3 for heat dissipation through a heat-conducting component. Since there is a water hole in the shaft, the drilling fluid directly enters the water hole at the wellhead at a lower temperature, while the outer ring 2 comes into contact with the external drilling fluid, which is heated in the wellbore and has a higher temperature, which is not conducive to heat dissipation of the outer ring 2. Therefore, by setting up a heat-conducting component, the heat of the outer ring 2 is transferred to the heat dissipation component for heat dissipation, resulting in higher heat dissipation efficiency.

[0024] The bearings with the above-mentioned stress distribution for downhole applications can be further optimized and / or improved according to actual needs: Example 2: As shown in the attached document Figure 1 , 2As shown, the annular heat-conducting plate 3 is a copper ring, and the annular heat dissipation fin 4 is an aluminum ring with several fins on its top surface. This arrangement results in high heat conduction efficiency.

[0025] Example 3: As shown in the attached document Figure 3 As shown, the thermal conductive assembly includes a thermal conductive groove 5 and a silicone grease layer 6. The outer ring 2 has outward-facing thermal conductive grooves 5 on both its front and rear sides. The thermal conductive grooves 5 are filled with the silicone grease layer 6. A thermal conductive ring 18 is placed inside the thermal conductive groove 5, and the thermal conductive ring 18 is in contact with the silicone grease layer 6. Several thermal conductive pipes 7 are fixedly installed along the circumference of the top surface of the thermal conductive ring 18. The other end of each thermal conductive pipe 7 is fixedly connected to the top surface of the annular thermal conductive sheet 3. The outer ring 2 transfers heat to the thermal conductive groove 5. Heat is dissipated with the assistance of the silicone grease layer 6 within the thermal conductive groove 5, and the heat is transferred from the outer ring 2 to the heat dissipation assembly via the thermal conductive ring 18 and the thermal conductive pipes 7 for heat dissipation.

[0026] Example 4: As shown in the appendix Figure 4 , 5 As shown, the dustproof assembly includes a dust cover 10 and a retaining ring 12. The dust cover 10 is an annular cover, and its outer surface is snapped onto the inner side of the outer ring 2. The retaining ring 12 is fixedly connected to the rear side of the inner ring 10. A sealing groove 11 is installed on the outer side of the inner ring 1. The sealing groove 11 has an annular inlet 13 that opens forward. The sealing groove 11 is filled with lubricating oil, and the retaining ring 12 is inserted into the sealing groove 11 through the annular inlet 13. The dust cover 10 prevents impurities and dust from entering between the inner ring 1 and the outer ring 2, preventing dust from entering and causing lubricating oil contamination and increased friction. The retaining ring 12 does not rotate when the inner ring 1 rotates, thus improving the sealing effect without affecting the rotation of the inner ring 1.

[0027] Example 5: As shown in the attached document Figure 6 As shown, the rolling assembly includes a cage 8 and rolling elements 9. The cage 8 has several through-holes, and each through-hole is movably connected to a rolling element 9. The cage 8 is engaged with the inner ring 1 and the outer ring 2 respectively through the rolling elements 9. Lubrication components are provided on the front and inside of the cage 8. The cage 8 and rolling elements 9, when in use, allow the rolling elements 9 to roll between the inner ring 1 and the outer ring 2, thus bearing the load. The cage 8, by equally distributing the rolling elements 9, prevents them from colliding or gathering together.

[0028] Example 6: As attached Figure 2 , 7As shown, the lubrication assembly includes an oil supply pipe 17 and a sealing plug 15. An oil groove 14 is provided inside the retainer 8. Each mounting port has an oil outlet 16 on its inner side, and the oil outlet 16 communicates with the interior of the oil groove 14. The front end of the oil supply pipe 17 passes through a dust cover 10, and the front part of the oil supply pipe 17 is threadedly connected to the sealing plug 15. The rear end of the oil supply pipe 17 passes through the retainer 8 and communicates with the oil groove 14. Lubricating oil is supplied to the oil groove 14 through the oil supply pipe 17. After the supply is completed, the sealing plug 15 is threadedly connected to the oil supply pipe 17, so that when the inner ring 1 rotates, the rolling element 9 rotates together, thereby continuously lubricating the surface of the rolling element 9 through the oil outlet 16.

[0029] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A bearing for stress distribution in downhole applications, characterized in that... It includes an inner ring and an outer ring, with a rolling assembly connecting the inner and outer rings. The inner wall of the outer ring is equipped with a dustproof assembly. The front and rear sides of the inner ring are equipped with heat dissipation assemblies, which include annular heat-conducting plates and annular heat dissipation fins. The front and back sides of the inner ring are fixedly connected to annular heat-conducting plates, and annular heat dissipation fins are fixedly installed on the outer side of the annular heat-conducting plates. The front and back sides of the outer ring are equipped with heat-conducting assemblies.

2. The bearing with stress distribution for downhole applications according to claim 1, characterized in that... The annular heat-conducting plate is a copper ring, and the annular heat dissipation fins are aluminum rings with several fins on the top surface.

3. The bearing with stress distribution for downhole applications according to claim 1 or 2, characterized in that... The thermal conductive assembly includes a thermal conductive groove and a silicone grease layer. The front and rear sides of the outer ring are provided with outward-facing thermal conductive grooves. The thermal conductive grooves are filled with a silicone grease layer. A thermal conductive ring is placed inside the thermal conductive groove and is attached to the silicone grease layer. Several thermal conductive tubes are fixedly installed on the top surface of the thermal conductive ring along the circumference. The other end of the thermal conductive tubes is fixedly connected to the top surface of the annular thermal conductive sheet.

4. The bearing with stress distribution for downhole applications according to claim 1 or 2, characterized in that... The dustproof assembly includes a dust cover and a retaining ring. The dust cover is an annular cover, and its outer surface is snapped onto the inner side of the outer ring. A retaining ring is fixedly connected to the rear side of the inner ring of the dust cover. A sealing groove is installed on the outer side of the inner ring. The sealing groove has an annular opening that faces forward. The sealing groove is filled with lubricating oil. The retaining ring is inserted into the sealing groove through the annular opening.

5. The bearing with stress distribution for downhole applications according to claim 3, characterized in that... The dustproof assembly includes a dust cover and a retaining ring. The dust cover is an annular cover, and its outer surface is snapped onto the inner side of the outer ring. A retaining ring is fixedly connected to the rear side of the inner ring of the dust cover. A sealing groove is installed on the outer side of the inner ring. The sealing groove has an annular opening that faces forward. The sealing groove is filled with lubricating oil. The retaining ring is inserted into the sealing groove through the annular opening.

6. The bearing with stress distribution for downhole applications according to claim 1, 2, or 5, characterized in that... The rolling assembly includes a cage and rolling elements. The cage has several through mounting holes, and rolling elements are movably connected to each mounting hole. The cage is engaged with the inner and outer rings respectively through the rolling elements. Lubrication components are provided on the front and inside of the cage.

7. The bearing with stress distribution for downhole applications according to claim 3, characterized in that... The rolling assembly includes a cage and rolling elements. The cage has several through mounting holes, and the inner walls of each mounting hole are movably connected to rolling elements. The cage engages with the inner and outer rings respectively through the rolling elements. Lubrication components are provided on the front and inside of the cage.

8. The bearing with stress distribution for downhole applications according to claim 4, characterized in that... The rolling assembly includes a cage and rolling elements. The cage has several through mounting holes, and the inner walls of each mounting hole are movably connected to rolling elements. The cage engages with the inner and outer rings respectively through the rolling elements. Lubrication components are provided on the front and inside of the cage.

9. The bearing with stress distribution for downhole applications according to claim 6, characterized in that... The lubrication assembly includes an oil supply pipe and a sealing plug. The cage has an oil groove, and each mounting port has an oil outlet on its inner side, which is connected to the inside of the oil groove. The front end of the oil supply pipe passes through a dust cover, and the front part of the oil supply pipe is threaded with a sealing plug. The rear end of the oil supply pipe passes through the cage and is connected to the oil groove.

10. The bearing with stress distribution for downhole applications according to claim 7 or 8, characterized in that... The lubrication assembly includes an oil supply pipe and a sealing plug. The cage has an oil groove, and each mounting port has an oil outlet on its inner side, which is connected to the inside of the oil groove. The front end of the oil supply pipe passes through a dust cover, and the front part of the oil supply pipe is threaded with a sealing plug. The rear end of the oil supply pipe passes through the cage and is connected to the oil groove.

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