Anti-falling structure of roller shaft of redressing device

Abstract

The utility model relates to the related technical field of drilling equipment, in particular to an anti-falling structure of a roller shaft of a reamer, which comprises a main body and a locking mechanism arranged on one side of the surface of the main body. According to the anti-falling structure of the roller shaft of the redressing device, through the arrangement of the locking mechanism, when a roller needs to be locked in the main body, at the moment, an upper fixing block is firstly embedded in a locking groove, a lower fixing block is embedded in the locking groove, and then the roller is embedded in an embedding groove and is located between the upper fixing block and the lower fixing block at the same time; one end of a rotating shaft sequentially penetrates through an upper fixing block, a rolling wheel and a lower fixing block, meanwhile, a clamping block is embedded in a clamping groove, then a splicing ring divided into four parts is placed in an inner groove, one end of a supporting sleeve is embedded in the splicing ring, and therefore the splicing ring is supported; and finally, the spiral check ring is placed in the inner groove so as to support and fix the supporting sleeve, and at the moment, the rolling wheel can be fixed in the embedding groove.

Description

Technical Field

[0001] This utility model relates to the technical field of drilling equipment, and in particular to an anti-drop structure for the roller shaft of a drilling tool. Background Technology

[0002] A reamer is a type of drilling stabilizer, characterized by three self-rotating rollers mounted on its body. During normal drilling, the reamer rotates with the drill bit, while the rollers rub against the well wall and rotate in the opposite direction, greatly reducing the frictional resistance between the tool and the well wall. Simultaneously, the wear-resistant rollers, upon contact with the well wall, can adjust the wellbore diameter to the standard wellbore size. Whether drilling vertical or directional wells, the reamer ensures that subsequent drill strings or casing can be run into the correct wellbore diameter. Therefore, a structure to prevent the reamer roller shafts from falling off is particularly needed.

[0003] However, the existing anti-drop structure of the roller shaft in reamers currently used in China mainly consists of a body, roller shaft, fixing block, roller, bolts, etc. The roller can rotate by relying on the roller shaft passing between the upper and lower fixing blocks. The fixing block is inserted into the body through a keyway connection. In order to prevent the axial movement of the roller shaft, six limiting grooves are milled on the body of the reamer, and an elastic pin passes through the middle, as well as through the small holes on the fixing block and the roller shaft. This can effectively prevent the roller shaft from coming out. However, the disadvantage of this structure is that milling six limiting grooves on the body of the reamer weakens the strength of the body to a certain extent. As the downhole environment becomes more and more complex, the operating conditions of reamers downhole are also becoming more demanding. During use, the body of the reamer often cracks, which can cause accidents downhole. Summary of the Invention

[0004] The purpose of this utility model is to provide an anti-drop structure for the roller shaft of an eye sizing device, so as to solve the problem of the existing anti-drop structure for the roller shaft of an eye sizing device mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an anti-drop structure for the roller shaft of an eye scraper, comprising a main body and a locking mechanism, wherein a roller is mounted on one side of the surface of the main body, and a locking mechanism is provided on one side of the surface of the main body;

[0006] The locking mechanism includes a locking groove, a fitting groove, an upper limit block, a lower limit block, an upper fixing block, a lower fixing block, an upper limit groove, an inner groove, a lower limit groove, a slot, a rotating shaft, a locking block, a splicing ring, a support sleeve, and a spiral retaining ring. A locking groove is formed on one side of the surface of the main body. A fitting groove is formed on one side of the surface of the main body. An upper limit block is fixedly connected to one side of the surface of the main body. A lower limit block is fixedly connected to one side of the surface of the main body. An upper fixing block is fitted inside the locking groove. A lower fixing block is fitted inside the locking groove. An upper limit groove is formed on one side of the surface of the upper fixing block. An inner groove is formed on one end face of the upper fixing block. A lower limit groove is formed on one side of the surface of the lower fixing block. A slot is formed at one end of the lower fixing block. A rotating shaft passes through the interior of the upper fixing block. A locking block is fixedly connected to one end of the rotating shaft. A splicing ring is placed inside the inner groove. A support sleeve is placed inside the inner groove. A spiral retaining ring is placed inside the inner groove.

[0007] Preferably, the locking groove and the fitting groove are interconnected.

[0008] Preferably, the upper limit block and the upper limit slot are of the same size, and the lower limit block and the lower limit slot are of the same size.

[0009] Preferably, the fitting groove is provided in three sets, and rollers are fitted inside the fitting groove.

[0010] Preferably, the rotating shaft passes through the roller.

[0011] Preferably, the splicing ring is configured as four parts, with one end of the support sleeve supported inside the splicing ring.

[0012] Preferably, the card block is fitted inside the card slot.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. The structural strength of the reamer body has been enhanced, greatly improving the safety and stability of the reamer during downhole operations;

[0015] 2. The structure, which uses a ring clamping mechanism in the inner groove of the fixed block, can more effectively prevent the roller shaft from shifting.

[0016] 3. The structure is simple with few parts and is easy to disassemble and maintain. Attached Figure Description

[0017] Figure 1 This is a side view of the appearance structure of this utility model;

[0018] Figure 2 This is an exploded view of the locking mechanism of this utility model;

[0019] Figure 3This is a schematic diagram of the structure of the rotating shaft and roller of this utility model.

[0020] In the diagram: 1. Main body; 2. Roller; 3. Locking mechanism; 301. Locking groove; 302. Fitting groove; 303. Upper limit block; 304. Lower limit block; 305. Upper fixing block; 306. Lower fixing block; 307. Upper limit groove; 308. Inner groove; 309. Lower limit groove; 310. Slot; 311. Rotating shaft; 312. Slot; 313. Connecting ring; 314. Support sleeve; 315. Spiral retaining ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0022] Please see Figure 1-3 This utility model provides a technical solution: an anti-drop structure for the roller shaft of an eye scraper, including a main body 1 and a locking mechanism 3. A roller 2 is installed on one side of the surface of the main body 1, and a locking mechanism 3 is provided on one side of the surface of the main body 1.

[0023] The locking mechanism 3 includes a locking groove 301, a fitting groove 302, an upper limit block 303, a lower limit block 304, an upper fixing block 305, a lower fixing block 306, an upper limit groove 307, an inner groove 308, a lower limit groove 309, a slot 310, a rotating shaft 311, a locking block 312, a connecting ring 313, a support sleeve 314, and a spiral retaining ring 315. A locking groove 301 and a fitting groove 302 are formed on one side of the surface of the main body 1. An upper limit block 303 and a lower limit block 304 are fixedly connected to one side of the surface of the main body 1. An upper fixing block 305 is fitted inside the locking groove 301, thus locking the upper limit block. A lower fixing block 306 is fitted inside the groove 301. An upper fixing block 305 has an upper limit groove 307 on one side of its surface. An inner groove 308 is formed on one end face of the upper fixing block 305. A lower limit groove 309 is formed on one side of the surface of the lower fixing block 306. A locking groove 310 is formed on one end of the lower fixing block 306. A rotating shaft 311 passes through the interior of the upper fixing block 305. A locking block 312 is fixedly connected to one end of the rotating shaft 311. A splicing ring 313 is placed inside the inner groove 308. A support sleeve 314 is placed inside the inner groove 308. A spiral retaining ring 315 is placed inside the inner groove 308. The locking groove 301, the fitting groove 302, and the upper limit block are connected. The arrangement of components 303, 304, 305, 306, 307, 308, 309, 310, 311, 312, 313, 314, 315, and 315 is as follows: When it is necessary to lock the roller 2 inside the main body 1, firstly, the lower fixing block 306 is engaged with the locking groove 301, and simultaneously the lower limiting block 304 is engaged with the lower limiting groove 309. Then, the upper fixing block 305 is engaged with the locking groove 301, and simultaneously the upper limiting block 303 is engaged with the upper limiting groove 307. Finally, the roller 2 is... The roller 2 is fitted inside the fitting groove 302. At this time, the roller 2 is fitted inside the lower fixing block 306 and the upper fixing block 305. Then, one end of the rotating shaft 311 is sequentially passed through the upper fixing block 305, the roller 2 and the lower fixing block 306. At the same time, the locking block 312 is fitted inside the locking groove 310. Then, the four-part splicing ring 313 is placed inside the inner groove 308. Then, the support sleeve 314 is fitted inside the splicing ring 313 to support the splicing ring 313. Finally, the spiral retaining ring 315 is placed inside the inner groove 308 to support and fix the support sleeve 314. At this time, the roller 2 can be fixed inside the fitting groove 302.

[0024] Furthermore, the locking groove 301 and the fitting groove 302 are interconnected. With the locking groove 301, during use, the upper fixing block 305 and the lower fixing block 306 can be easily fixed to the surface of the main body 1.

[0025] Furthermore, the upper limit block 303 and the upper limit slot 307 are matched in size, and the lower limit block 304 and the lower limit slot 309 are matched in size. With the upper limit block 303 and the lower limit block 304 set, the upper limit block 303 can be easily fixed to the upper fixing block 305, and the lower limit block 304 can be easily fixed to the lower fixing block 306 during use.

[0026] Furthermore, the fitting groove 302 is provided in three sets, and the roller 2 is fitted inside the fitting groove 302. Through the setting of the fitting groove 302, the roller 2 can be easily installed and fixed on the surface of the main body 1 during use.

[0027] Furthermore, the rotating shaft 311 passes through the roller block 2. Through the setting of the rotating shaft 311, the upper fixing block 305, the roller 2 and the lower fixing block 306 can be connected through the rotating shaft 311 during use.

[0028] Furthermore, the splicing ring 313 is configured as four parts, with one end of the support sleeve 314 supported inside the splicing ring 313. Through the configuration of the splicing ring 313, when the splicing ring 313 is fully fitted and fixed inside the inner groove 308 during use, the rotating shaft 311 can be fixed.

[0029] Furthermore, the locking block 312 is fitted inside the slot 310. By setting the locking block 312, the rotating shaft 311 can be initially fixed when the locking block 312 is fitted inside the slot 310 during use.

[0030] Working principle: When it is necessary to lock roller 2 inside the main body 1, firstly, the lower fixing block 306 is engaged inside the locking groove 301, and simultaneously the lower limit block 304 is engaged inside the lower limit groove 309. Then, the upper fixing block 305 is engaged inside the locking groove 301, and simultaneously the upper limit block 303 is engaged inside the upper limit groove 307. Next, roller 2 is engaged inside the engagement groove 302. At this time, roller 2 is engaged inside the lower fixing block 306 and the upper fixing block 305. Then, the roller 2 is engaged inside the locking groove 302. One end of shaft 311 passes through upper fixing block 305, roller 2 and lower fixing block 306 in sequence, while locking block 312 is fitted into the inside of locking groove 310. Then, the four-part splicing ring 313 is placed inside the inner groove 308, and then the support sleeve 314 is fitted into the splicing ring 313 to support the splicing ring 313. Finally, the spiral retaining ring 315 is placed inside the inner groove 308 to support and fix the support sleeve 314. At this time, roller 2 can be fixed inside the fitting groove 302.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A structure for preventing the roller shaft of an eye scraper from falling off, comprising a main body (1) and a locking mechanism (3), characterized in that: A roller (2) is installed on one side of the surface of the main body (1), and a locking mechanism (3) is provided on one side of the surface of the main body (1). The locking mechanism (3) includes a locking groove (301), a fitting groove (302), an upper limit block (303), a lower limit block (304), an upper fixing block (305), a lower fixing block (306), an upper limit groove (307), an inner groove (308), a lower limit groove (309), a slot (310), a rotating shaft (311), a locking block (312), a connecting ring (313), a support sleeve (314), and a spiral retaining ring (315). A locking groove (301) is provided on one side of the surface of the main body (1), a fitting groove (302) is provided on one side of the surface of the main body (1), an upper limit block (303) is fixedly connected to one side of the surface of the main body (1), and a lower limit block (304) is fixedly connected to one side of the surface of the main body (1). The locking groove (301) contains a fitting groove (302). The upper fixing block (305) has a lower fixing block (306) fitted inside the locking groove (301). An upper limit groove (307) is provided on one side of the surface of the upper fixing block (305). An inner groove (308) is provided on one end face of the upper fixing block (305). A lower limit groove (309) is provided on one side of the surface of the lower fixing block (306). A slot (310) is provided at one end of the lower fixing block (306). A rotating shaft (311) passes through the interior of the upper fixing block (305). A locking block (312) is fixedly connected to one end of the rotating shaft (311). A splicing ring (313) is placed inside the inner groove (308). A support sleeve (314) is placed inside the inner groove (308). A spiral retaining ring (315) is placed inside the inner groove (308).

2. The anti-drop structure for the roller shaft of an eye scraper according to claim 1, characterized in that: The locking groove (301) and the fitting groove (302) are interconnected.

3. The anti-drop structure for the roller shaft of an eye scraper according to claim 1, characterized in that: The upper limit block (303) and the upper limit slot (307) are of the same size, and the lower limit block (304) and the lower limit slot (309) are of the same size.

4. The anti-drop structure for the roller shaft of an eye scraper according to claim 1, characterized in that: The fitting groove (302) is provided in three sets, and a roller (2) is fitted inside the fitting groove (302).

5. The anti-drop structure for the roller shaft of an eye scraper according to claim 1, characterized in that: The rotating shaft (311) passes through the roller (2).

6. The anti-drop structure for the roller shaft of an eye scraper according to claim 1, characterized in that: The splicing ring (313) is configured as four parts, and one end of the support sleeve (314) is supported inside the splicing ring (313).

7. The anti-drop structure for the roller shaft of an eye scraper according to claim 1, characterized in that: The card block (312) is fitted inside the card slot (310).

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