A roller structure for a roller stabilizer
By combining TC bearings and flat bearings, the problems of load adaptability and foreign object intrusion in the roller centralizer during drilling are solved, thereby achieving roller stability and extending service life.
Patent Information
- Application Number
- CN202620012509.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-07
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2036-01-07
AI Technical Summary
The roller bearings of existing roller stabilizers are difficult to adapt to complex loads during drilling and are prone to failure due to foreign object intrusion, resulting in a reduced lifespan.
The design employs a combination of TC bearings and thrust bearings. The TC bearings bear radial loads and provide low-friction rotation protection, while the thrust bearings absorb vibration and shock and limit axial movement. Combined with bearing pads and seals, this design prevents foreign object intrusion and extends service life.
The bearing matching design improves the overall lifespan of the roller centralizer, reduces damage to the rollers from foreign objects, and ensures stable and low-friction operation.
Smart Images
Figure CN224944120U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of roller straighteners, and specifically relates to a roller structure of a roller straightener. Background Technology
[0002] A roller centralizer is a tool used in oil drilling and production engineering. Its core function is to reduce the resistance between the drill string or casing and the wellbore by converting sliding friction into rolling friction, while keeping the equipment centered. The roller is an important component of the centralizer, and its core function is to achieve low-friction centralization and provide radial support force. For low-friction centralization, the roller converts sliding friction into rolling friction through a ball bearing structure, reducing downward resistance. In addition, the roller provides radial support by contacting the wellbore or tubing inner wall.
[0003] Currently, roller bearings generally use a single bearing, which is not suitable for the complexity of loads during drilling. Furthermore, current rollers are prone to foreign object intrusion, leading to bearing failure and reduced lifespan. Utility Model Content
[0004] In view of this, the present invention provides a roller structure for a roller centralizer, which aims to solve the technical problems that existing rollers cannot adapt to the complexity of loads during drilling and that foreign objects can easily intrude, leading to bearing failure and reduced lifespan.
[0005] To solve the aforementioned technical problems, the present invention adopts the following technical solution: A roller structure for a roller straightener includes: Roller assembly, the roller assembly comprising: A roller, with a first connecting shaft and a second connecting shaft connected to its two ends respectively. Both the first connecting shaft and the second connecting shaft are provided with a first bearing and a second bearing. The first bearing and the second bearing cooperate to bear radial load and axial load. A support assembly, wherein the first connecting shaft and the second connecting shaft are respectively rotatably connected to the support assembly.
[0006] In this utility model, the roller is connected to the corresponding support component through the first connecting shaft and the second connecting shaft at both ends. The support component supports the first connecting shaft and the second connecting shaft. After the roller component and the support component are connected, an integral roller structure is formed. The roller straightener is assembled by installing the support component on the straightener body. Furthermore, in this invention, the first bearing and the second bearing are sequentially arranged on the first connecting shaft and the second connecting shaft. Through the cooperation of the first bearing and the second bearing, they jointly bear the load on the roller in the axial and radial directions, thereby extending the service life of the straightener.
[0007] Preferably, the first bearing is a TC bearing and the second bearing is a plane bearing.
[0008] After adopting this technical solution, it should be noted that the core function of the TC bearing is to bear radial loads, support the weight of the drill pipe, achieve low-friction rotation, and protect the surface of the drill pipe. The plane bearing mainly bears axial loads, absorbs drill string vibration and impact, limits the axial movement of the rollers, and maintains the stability of the rollers. The cooperation between the two bearings bears axial and radial loads, extending the overall life of the centralizer. In addition, due to its own structure, the TC bearing forms a rigid barrier on its surface, which can grind foreign objects such as stones, thereby reducing damage to the rollers and extending their service life.
[0009] Preferably, the first bearing is provided at one end of the first connecting shaft and the second connecting shaft near the roller, and the second bearing is provided at the end of the first connecting shaft and the second connecting shaft.
[0010] Preferably, the first connecting shaft and the second connecting shaft have circumferential first mounting grooves, and the first bearing is embedded in the first mounting groove.
[0011] After adopting this technical solution, it should be noted that by setting the first mounting groove and embedding the first bearing in the first mounting groove, on the one hand, the stability of the first bearing can be improved, and it is not easy to shift when receiving radial force; on the other hand, the embedding method can make the force transmission more uniform, which is beneficial to extending the service life.
[0012] Preferably, a bearing pad is connected between the second bearing and the first connecting shaft or the end of the second connecting shaft.
[0013] After adopting this technical solution, it should be noted that, on the one hand, the bearing pad absorbs the vibration of the roller and reduces the contact wear between the plane bearing and the first or second connecting shaft; on the other hand, the bearing pad can improve the uniformity of contact with the end face of the first or second connecting shaft, which is beneficial to load distribution and transmission.
[0014] Preferably, a plug is connected to the outside of the second bearing, and a second seal is provided circumferentially on the plug, and a first seal is provided between the first bearing and the first bearing.
[0015] After adopting this technical solution, it should be noted that the function of both the first and second sealing elements is to prevent foreign objects from entering the support assembly and affecting its service life. In this application, the first sealing element is a first sealing ring made of rubber. The second sealing element includes a retaining ring and a second sealing ring. Both the retaining ring and the second sealing ring are located on the plug, and the retaining ring is located on the side closer to the roller. The retaining ring and the second sealing ring work together to enhance the sealing performance.
[0016] Preferably, the support component includes: A first support block, the first connecting shaft being connected to the first support block; The second support block is connected to the second connecting shaft. The inner walls of the first support block and the second support block are circumferentially provided with second mounting grooves corresponding to the first mounting groove. The inner ring of the first bearing is engaged in the first mounting groove, and the outer ring of the first bearing is engaged in the second mounting groove.
[0017] After adopting this technical solution, it should be noted that the first support block and the second support block correspond to and are connected to the first connecting shaft and the second connecting shaft, respectively. The first mounting groove and the second mounting groove form an area for the first bearing to be installed. The first bearing is divided into an inner ring and an outer ring. The inner ring of the first bearing is embedded in the first mounting groove, and the outer ring of the first bearing is embedded in the second mounting groove. The first bearing is made of high-hardness alloy material.
[0018] Preferably, the inner walls of the first support block and the second mounting groove are also provided with circumferential sealing grooves for embedding the first sealing element, so as to enhance the sealing performance of the first sealing element.
[0019] Furthermore, the roller is provided with a plurality of rolling elements in the circumferential direction.
[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. The roller structure of the roller centralizer provided by this utility model, by setting TC bearing and plane bearing in cooperation, relies on TC bearing to support the weight of drill rod, achieve low friction rotation and protect the surface of drill rod, and relies on plane bearing to absorb drill string vibration and impact, limit the axial movement of roller and maintain roller stability. The mutual cooperation of the two bearings bears axial and radial loads and extends the overall service life of centralizer.
[0021] 2. The roller structure of the roller centering device provided by this utility model, by setting bearing pads, absorbs roller vibration on the one hand, reduces contact wear between the plane bearing and the first connecting shaft or the second connecting shaft, and on the other hand, the bearing pads can improve the uniformity of contact with the end face of the first connecting shaft or the second connecting shaft, thereby facilitating load distribution and transmission.
[0022] 3. The roller structure of the roller stabilizer provided by this utility model further prevents external foreign objects from entering the support assembly by setting a first sealing element and a second sealing element. Attached Figure Description
[0023] This utility model will be described by way of example and with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the roller assembly structure of this utility model; Figure 3 This is an exploded view of the roller assembly structure of this utility model; Figure 4 This utility model Figure 1 A sectional view.
[0024] Figure label: 1-Roller assembly, 101-Roller, 102-First connecting shaft, 103-Second connecting shaft, 104-First mounting groove, 2-First support block, 3-Second support block, 4-First seal, 5-First bearing, 6-Second bearing, 7-Bearing pad, 8-Plug, 9-Second seal, 901-Second sealing ring, 902-Retaining ring, 10-Rolling element, 11-Sealing groove, 12-Second mounting groove. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments and accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0026] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility product is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0027] The following is combined Figures 1-4 This utility model will be described in detail. Example 1
[0028] A roller structure for a roller stabilizer, such as Figures 1-4 As shown, it includes: Roller 101 assembly, the roller 101 assembly comprising: Roller 101, with a first connecting shaft 102 and a second connecting shaft 103 respectively connected to both ends of roller 101. A first bearing 5 and a second bearing 6 are provided on the first connecting shaft 102 and the second connecting shaft 103. The first bearing 5 and the second bearing 6 cooperate to bear radial load and axial load. The support assembly is provided, with the first connecting shaft 102 and the second connecting shaft 103 respectively rotatably connected to the support assembly.
[0029] The first bearing 5 is a TC bearing, and the second bearing 6 is a plane bearing.
[0030] The first connecting shaft 102 and the second connecting shaft 103 are provided with the first bearing 5 at one end near the roller 101, and the second bearing 6 is provided at the end of the first connecting shaft 102 and the second connecting shaft 103.
[0031] The first connecting shaft 102 and the second connecting shaft 103 have circumferential first mounting grooves 104. The first bearing 5 is embedded in the first mounting groove 104. By setting the first mounting groove 104 to embed the first bearing 5, on the one hand, the stability of the first bearing 5 can be improved, and it is not easy to shift when receiving radial force; on the other hand, the embedding method can make the force transmission more uniform, which is beneficial to extending the service life.
[0032] A bearing pad 7 is connected between the second bearing 6 and the end of the first connecting shaft 102 or the second connecting shaft 103. The bearing pad 7 absorbs the vibration of the roller 101 and reduces the wear between the planar bearing and the first connecting shaft 102 or the second connecting shaft 103. On the other hand, the bearing pad 7 can improve the uniformity of contact with the end face of the first connecting shaft 102 or the second connecting shaft 103, which is beneficial to load distribution and transmission.
[0033] A plug 8 is connected to the outside of the second bearing 6.
[0034] The roller 101 is provided with a plurality of rolling elements 10 in the circumferential direction.
[0035] In this embodiment, the roller 101 is connected to the corresponding support assembly via the first connecting shaft 102 and the second connecting shaft 103 at both ends. The support assembly supports the first connecting shaft 102 and the second connecting shaft 103. After the roller 101 assembly and the support assembly are connected, an integral roller 101 structure is formed. The roller 101 centralizer is assembled by installing the support assembly on the centralizer body. The first bearing 5 and the second bearing 6 are sequentially arranged on the first connecting shaft 102 and the second connecting shaft 103. The core function of the TC bearing is to bear radial load, support the weight of the drill pipe, achieve low-friction rotation, and protect the surface of the drill pipe. The plane bearing mainly bears axial load, absorbs the vibration and impact of the drill string, limits the axial movement of the roller 101, and maintains the stability of the roller 101. The mutual cooperation of the two bearings bears axial and radial loads, extending the overall life of the centralizer. In addition, due to its own structure, the surface of the TC bearing forms a rigid barrier, which can grind foreign objects such as stones by its own structure, thereby reducing the damage of foreign objects to the roller and extending its service life. Example 2
[0036] The difference between this embodiment and Embodiment 1 is that, as Figure 2 , Figure 3 As shown, a plug 8 is connected to the outside of the second bearing 6, and a second seal 9 is provided circumferentially on the plug 8. A first seal 4 is provided between the first bearing 5 and the bearing.
[0037] In this embodiment, the function of the first seal 4 and the second seal 9 is to prevent foreign objects from entering the support assembly and affecting its service life. In this embodiment, the first seal 4 is a first sealing ring made of rubber. The second seal 9 includes a retaining ring 902 and a second sealing ring 901. Both the retaining ring 902 and the second sealing ring 901 are located on the plug 8, and the retaining ring 902 is located on the side closer to the roller 101. The retaining ring 902 and the second sealing ring 901 work together to enhance the sealing performance. Example 3
[0038] The difference between this embodiment and Embodiment 2 is that, as Figure 1 As shown, the support component includes: First support block 2, the first connecting shaft 102 is connected to the first support block 2; The second support block 3 is connected to the second connecting shaft 103. like Figure 4 As shown, the inner walls of the first support block 2 and the second support block 3 are circumferentially provided with second mounting grooves 12 corresponding to the first mounting groove 104. The inner ring of the first bearing 5 is engaged in the first mounting groove 104, and the outer ring of the first bearing 5 is engaged in the second mounting groove 12.
[0039] The inner walls of the first support block 2 and the second mounting groove 12 are also circumferentially provided with sealing grooves 11 for embedding the first sealing element 4, so as to enhance the sealing performance of the first sealing element 4.
[0040] In this embodiment, the first support block 2 and the second support block 3 correspond to and are connected to the first connecting shaft 102 and the second connecting shaft 103, respectively. The first mounting groove 104 and the second mounting groove 12 form an area for the first bearing 5 to be installed. The first bearing 5 is divided into an inner ring and an outer ring. The inner ring of the first bearing 5 is embedded in the first mounting groove 104, and the outer ring of the first bearing 5 is embedded in the second mounting groove 12. The first bearing 5 is made of a high-hardness alloy material.
[0041] The working principle of this utility model: By using a combination of TC bearings and a plane bearing, the TC bearing supports the weight of the drill pipe, achieves low-friction rotation, and protects the surface of the drill pipe. The plane bearing absorbs the vibration and impact of the drill string, limits the axial movement of the roller 101, and maintains the stability of the roller 101. The mutual cooperation of the two bearings bears the axial and radial loads, extending the overall life of the stabilizer. The TC bearing's own structure wears away foreign objects to prevent damage to the roller 101. The first seal 4 and the second seal 9 prevent mud and other substances from entering.
[0042] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A roller structure for a roller straightener, characterized in that, include: Roller assembly, the roller assembly comprising: Roller (101), with a first connecting shaft (102) and a second connecting shaft (103) connected to both ends of the roller (101). The first connecting shaft (102) and the second connecting shaft (103) are each provided with a first bearing (5) and a second bearing (6). The first bearing (5) and the second bearing (6) cooperate to bear radial load and axial load. The support assembly is provided with the first connecting shaft (102) and the second connecting shaft (103) respectively rotatably connected to the support assembly; The first connecting shaft (102) and the second connecting shaft (103) have circumferential first mounting grooves (104), and the first bearing (5) is embedded in the first mounting groove (104); The support components include: The first support block (2) is connected to the first connecting shaft (102); The second support block (3) is connected to the second connecting shaft (103); The inner walls of the first support block (2) and the second support block (3) are provided with a second mounting groove (12) corresponding to the first mounting groove (104). The inner ring of the first bearing (5) is fitted in the first mounting groove (104), and the outer ring of the first bearing (5) is fitted in the second mounting groove (12).
2. The roller structure of a roller straightener according to claim 1, characterized in that: The first bearing (5) is a TC bearing, and the second bearing (6) is a plane bearing.
3. The roller structure of a roller centralizer according to claim 1, characterized in that: The first connecting shaft (102) and the second connecting shaft (103) are provided with the first bearing (5) at one end near the roller (101), and the second bearing (6) is provided at the end of the first connecting shaft (102) and the second connecting shaft (103).
4. The roller structure of a roller stabilizer according to any one of claims 1-3, characterized in that: A bearing pad (7) is connected between the second bearing (6) and the end of the first connecting shaft (102) or the second connecting shaft (103).
5. The roller structure of a roller stabilizer according to any one of claims 1-3, characterized in that: The second bearing (6) is connected to a plug (8) on the outside. The plug (8) is provided with a second seal (9) in the circumferential direction. The first bearing (5) is provided with a first seal (4) between it and the first bearing.
6. The roller structure of a roller stabilizer according to any one of claims 1-3, characterized in that: The inner walls of the first support block (2) and the second mounting groove (12) are also circumferentially provided with sealing grooves (11) for embedding the first sealing element (4).
7. The roller structure of a roller stabilizer according to any one of claims 1-3, characterized in that: The roller (101) is provided with a plurality of rolling elements (10) in the circumferential direction.