A casing centralizer for oil extraction cementing

Abstract

The present application relates to the technical field of oil exploitation, and discloses a casing centralizing device for well cementing in oil exploitation, which comprises an outer cylinder one, a mounting groove arranged on the lower part of the outer wall of the outer cylinder one, and a cleaning assembly comprising a hinged seat one, a connecting rod one and a casing one. When the oil extraction pipe needs to be pulled out of the well cylinder, the roller is brought into contact with the wall of the well cylinder to drive the casing two to rotate, the connecting belt is driven to rotate, the casing one is driven to rotate, the worm casing is driven to rotate and engaged with the turbine, the output casing is driven to rotate, the scraper rod and the Z-shaped cleaning rod connected to the upper part of the outer wall of the output casing are driven to rotate to clean the impurities on the centralizing device, the U-shaped cleaning rod is driven to rotate, the fallen rocks are prevented from being stuck between the elastic sheet and the oil extraction pipe to prevent the elastic sheet from being compressed, and the problem that the centralizer is hindered to be pulled out and is difficult to be pulled out is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of oil production, in particular to a casing straightening device for oil production cementing. Background Art

[0002] During the oil exploration process, drilling is first carried out. After drilling is completed, casing needs to be inserted into the well. Then, the gap between the outer wall of the casing and the inner wall of the well is poured with concrete. In order to make the spacing between the casing and the inner wall of the well uniform and prevent the casing from deflecting, the traditional method is to add stabilizers to the casing. One is added at a certain distance to ensure the vertical stability of the casing or oil pipe in the wellbore to prevent it from deflecting or tilting due to formation movement or vibration during drilling.

[0003] After the existing casing centralizer is placed in the wellbore for a long time, the well wall may crack or collapse due to formation pressure or chemical corrosion, causing rock to fall off. At the same time, mud, scaling or other sediments may accumulate inside the wellbore, and some of these fallen sediments will accumulate on the centralizer. When the centralizer needs to be pulled out, these substances may hinder the centralizer, making it difficult to pull out.

[0004] In view of the above problems, a casing straightening device for oil production and cementing is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a casing straightening device for oil production cementing, which solves the problem in the background technology that after the existing casing centralizer is placed in the wellbore for a long time, the well wall may crack or collapse due to formation pressure or chemical corrosion, resulting in rock falling off. At the same time, mud, scaling materials or other sediments may accumulate inside the wellbore, and some of these fallen sediments will accumulate on the centralizer. When the centralizer needs to be pulled out, these materials may hinder the centralizer, making it difficult to pull it out.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a casing straightening device for oil well drilling and cementing, comprising an outer cylinder; a mounting groove, which is opened on four sides of the lower outer wall of the outer cylinder; a cleaning assembly, wherein the cleaning assembly comprises an articulated seat, a connecting rod and a casing, and the four articulated seats are all installed inside the mounting groove, the middle part of the articulated seat on one side passes through and is fixedly connected to the connecting rod, the outer wall of the connecting rod is rotatably connected to the casing, the middle part of the outer wall of the casing is rotatably connected to the straightening rod, and the middle part of the end of the straightening rod away from the casing passes through and is fixedly connected to the connecting rod Second, the outer wall of the connecting rod is rotatably connected to the sleeve second, the middle part of the outer wall of the sleeve is fixedly connected to the roller, the left and right parts of the sleeve are fixedly connected to the worm sleeve, and the worm sleeve is arranged inside the hinge seat one and passes through one side of the hinge seat one, the inner part of the outer tube one is rotatably connected to the output sleeve, the lower part of the outer wall of the output sleeve is fixedly connected to the turbine and the turbine is meshed with the worm sleeve, the bottom of the outer wall of the turbine is fixedly connected to a U-shaped cleaning rod, the upper part of the outer wall of the output sleeve passes through the outer tube one and is fixedly connected to a scraper rod, and the end of the scraper rod away from the output sleeve is fixedly connected to a Z-shaped cleaning rod.

[0007] As a further description of the above technical solution: a hinge seat 2 is provided above each of the four hinge seats 1, and the hinge seat 2 is fixedly connected to the outer wall of the outer tube 1.

[0008] As a further description of the above technical solution: the outer walls of the sleeve 1 and the sleeve 2 are provided with connecting belts on the left and right sides, and the connecting belts pass through the inner left and right sides of the hinge seat 2;

[0009] As a further description of the above technical solution: a limiting groove is provided inside the top of the second hinge seat on one side, a spring is provided inside the limiting groove, one end of the spring away from the limiting groove is fixedly connected to the limiting block, one end of the limiting block away from the spring passes through the second hinge seat and is fixedly connected to a mounting plate, the mounting plate passes through the limiting block away from the limiting block and cooperates with the straightening rod;

[0010] As a further description of the above technical solution: a fixing rod is passed through and fixedly connected to the middle of one end of the mounting plate away from the limit block, and the outer wall of the fixing rod passes through the straightening rod and is rotatably connected to the straightening rod;

[0011] As a further description of the above technical solution: the middle part of the hinged seat 2 is rotatably connected to the rotating rod 1, the outer wall of the rotating rod 1 is fixedly connected to the elastic sheet, and the outer walls of the elastic sheets are rotatably connected to the balls.

[0012] As a further description of the above technical solution: outer cylinder 2 is arranged below outer cylinder 1, and hinge seats 3 are fixedly connected to the four sides of the outer wall of outer cylinder 2. A rotating rod 2 is rotatably connected to the middle part of the hinge seat 3 on one side, and the outer wall of the rotating rod 2 is fixedly connected to the end of the elastic sheet away from the ball.

[0013] As a further description of the above technical solution: the tops of the four elastic sheets are each provided with a groove, and the groove cooperates with the righting rod.

[0014] As a further description of the above technical solution: the inner walls of the outer cylinder 1 and the outer cylinder 2 are sleeved with oil production pipes.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention provides a casing straightening device for oil production and cementing. When the oil production pipe needs to be pulled out of the wellbore, the roller is abutted against the wellbore wall to rotate the roller, driving the second casing to rotate. The rotation of the second casing drives the connecting belt to rotate and simultaneously rotates the first casing. At the same time, the worm casing is rotated to engage with the turbine, so that the output casing is rotated. The scraper rod and the Z-shaped cleaning rod connected to the upper part of the outer wall of the output casing are rotated to clean impurities on the straightening device, and the U-shaped cleaning rod is driven to rotate at the same time, so as to prevent fallen rocks from being stuck between the elastic sheet and the oil production pipe, making the elastic sheet unable to be compressed, and thus avoiding the problem that the centralizer is blocked when being pulled out, making it difficult to pull out. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2 It is a schematic diagram of one side of the present invention;

[0019] Figure 3 is a schematic diagram of the elastic sheet of the present invention;

[0020] Figure 4 For the present invention Figure 4 A magnified view of point A;

[0021] Figure 5 is a cross-sectional view of a righting rod of the present invention;

[0022] Figure 6 It is a schematic diagram of the internal structure of the outer cylinder of the present invention.

[0023] In the figure: 1. Outer cylinder 1; 2. Mounting groove; 3. Articulated seat 1; 301. Connecting rod 1; 302. Casing 1; 303. Worm casing; 304. Straightening rod; 305. Connecting rod 2; 306. Casing 2; 307. Connecting belt; 308. Roller; 309. Output casing; 310. Turbine; 311. U-shaped cleaning rod; 312. Scraping rod; 313. Z-shaped cleaning rod; 4. Articulated seat 2; 5. Limiting groove; 6. Spring; 7. Limiting block; 8. Mounting plate; 9. Fixed rod; 10. Rotating rod 1; 11. Elastic sheet; 12. Groove; 13. Ball; 14. Articulated seat 3; 15. Rotating rod 2; 16. Outer cylinder 2; 17. Production pipe. DETAILED DESCRIPTION

[0024] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0025] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings.

[0026] Combine Figure 1 , Figure 2 , Figure 3 , Figure 4 , 5 pictures and Figure 6, including an outer cylinder 1; a mounting groove 2, which is opened on four sides of the lower outer wall of the outer cylinder 1; a cleaning assembly, which includes a hinge seat 3, a connecting rod 301 and a sleeve 302. The four hinge seats 3 are all installed inside the mounting groove 2. The middle part of the hinge seat 3 on one side passes through and is fixedly connected with a connecting rod 301. The outer wall of the connecting rod 301 is rotatably connected to the sleeve 302. The middle part of the outer wall of the sleeve 302 is rotatably connected to the straightening rod 304. When the roller 308 rotates, the sleeve 2 306 is driven to rotate through the sleeve 2 The rotation of 306 drives the connecting belt 307 to rotate and simultaneously rotates the sleeve 1 302. The middle part of the end of the straightening rod 304 away from the sleeve 1 302 penetrates and is fixedly connected to the connecting rod 2 305. The outer wall of the connecting rod 2 305 is rotatably connected to the sleeve 2 306. The middle part of the outer wall of the sleeve 2 306 is fixedly connected to the roller 308. The left and right parts of the sleeve 1 302 are fixedly connected to the worm sleeve 303, and the worm sleeve 303 is arranged inside the hinge seat 1 3 and penetrates one side of the hinge seat 1 3. The inner part of the outer cylinder 1 is rotatably connected to the output sleeve The worm sleeve 303 rotates and meshes with the turbine 310 when the sleeve 1 302 rotates, so that the turbine 310 drives the output sleeve 309 to rotate. The lower part of the outer wall of the output sleeve 309 is fixedly connected with the turbine 310 and the turbine 310 is meshed with the worm sleeve 303. The bottom of the outer wall of the turbine 310 is fixedly connected with a U-shaped cleaning rod 311. The upper part of the outer wall of the output sleeve 309 passes through the outer cylinder 1 and is fixedly connected with a scraper rod 312. The end of the scraper rod 312 away from the output sleeve 309 is fixedly connected with a A Z-shaped cleaning rod 313 and connecting belts 307 are provided on the left and right parts of the outer walls of the casing 1 302 and the casing 2 306, and the connecting belts 307 pass through the left and right parts of the inner part of the hinge seat 2 4. The scraper rod 312 connected to the upper part of the outer wall of the output casing 309 and the Z-shaped cleaning rod 313 are rotated to clean the impurities on the straightening device, and at the same time drive the U-shaped cleaning rod 311 to rotate to avoid the problem of obstruction to the straightening device when the straightening device is pulled out, making it difficult to pull out. The inner walls of the outer cylinder 1 and the outer cylinder 2 16 are sleeved with the oil production pipe 17.

[0027] Combine Figure 2 , Figure 4 A hinge seat 2 4 is provided above each of the four hinge seats 1 3 , and the hinge seat 2 4 is fixedly connected to the outer wall of the outer cylinder 1 , and is used to connect the elastic sheet 11 through the hinge seat 2 4 .

[0028] Combine Figure 4The top of the hinged seat 2 4 on one side is provided with a limiting groove 5, and the limiting groove 5 can prevent the limiting block 7 from popping out. A spring 6 is provided inside the limiting groove 5, and one end of the spring 6 away from the limiting groove 5 is fixedly connected to the limiting block 7, and the end of the limiting block 7 away from the spring 6 passes through the hinged seat 2 4 and is fixedly connected to the mounting plate 8, and the mounting plate 8 passes through and cooperates with the straightening rod 304 away from the limiting block 7. The middle part of the end of the mounting plate 8 away from the limiting block 7 passes through and is fixedly connected with a fixing rod 9, and the outer wall of the fixing rod 9 passes through the straightening rod 304 and is rotatably connected to the straightening rod 304. The elastic force of the limiting groove 5 drives the mounting plate 8 to apply pressure outward so that the roller 308 on the straightening rod 304 contacts the wall of the wellbore to make the roller 308 rotate. The tops of the four elastic sheets 11 are provided with grooves 12, and the grooves 12 cooperate with the straightening rod 304, and the straightening rod 304 can slide in the grooves 12.

[0029] Combine Figure 3 The middle part of the hinged seat 2 4 is rotatably connected to the rotating rod 10, and the outer wall of the rotating rod 10 is fixedly connected to the elastic sheet 11. The outer wall of the elastic sheet 11 is rotatably connected to the ball 13. The ball 13 rotates on the elastic sheet to make the ascent or descent smoother and reduce the resistance during movement. An outer cylinder 2 16 is provided below the outer cylinder 1. The four sides of the outer wall of the outer cylinder 2 16 are fixedly connected to the hinged seat 3 14. The middle part of the hinged seat 3 14 on one side is rotatably connected to the rotating rod 2 15. The outer wall of the rotating rod 2 15 is fixedly connected to the end of the elastic sheet 11 away from the ball 13. The centralizer can straighten the casing through the elastic sheet 11.

[0030] When the oil production pipe 17 needs to be pulled out of the wellbore, the elastic force of the limit groove 5 drives the mounting plate 8 to apply pressure outward so that the roller 308 on the straightening rod 304 contacts the wellbore wall and the roller 308 rotates. When the roller 308 rotates, it drives the casing 2 306 to rotate. The rotation of the casing 2 306 drives the connecting belt 307 to rotate and the casing 1 302 to rotate at the same time. When the casing 1 302 rotates, the worm casing 303 rotates and engages with the turbine 310, so that the turbine 310 drives the output casing 309 to rotate. The scraper rod 312 and the Z-shaped cleaning rod 313 connected to the upper part of the outer wall of the output casing 309 rotate to clean the impurities on the straightening device and drive the U-shaped cleaning rod 311 to rotate at the same time to prevent the fallen rock from being stuck between the elastic sheet 11 and the oil production pipe 17 so that the elastic sheet 11 cannot be compressed, thereby avoiding the problem that the centralizer is obstructed when it is pulled out, making it difficult to pull out.

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

Claims

1. A casing straightening device for oil well drilling and cementing, characterized by: include Outer cylinder one (1); The mounting grooves (2) are provided on four sides of the lower portion of the outer wall of the outer cylinder (1); A cleaning assembly, the cleaning assembly comprising an articulated seat (3), a connecting rod (301) and a sleeve (302), the four articulated seats (3) being installed inside the mounting groove (2), the middle portion of the articulated seat (3) on one side being penetrated by and fixedly connected to the connecting rod (301), the outer wall of the connecting rod (301) being rotatably connected to the sleeve (302), the middle portion of the outer wall of the sleeve (302) being rotatably connected to the straightening rod (304), the middle portion of the end of the straightening rod (304) away from the sleeve (302) being penetrated by and fixedly connected to the connecting rod (305), the outer wall of the connecting rod (305) being rotatably connected to the sleeve (306), the middle portion of the outer wall of the sleeve (306) being fixedly connected to the roller (308) The left and right parts of the sleeve (302) are fixedly connected with a worm sleeve (303), and the worm sleeve (303) is arranged inside the hinge seat (3) and passes through one side of the hinge seat (3). The inner part of the outer cylinder (1) is rotatably connected with the output sleeve (309). The lower part of the outer wall of the output sleeve (309) is fixedly connected with a turbine (310), and the turbine (310) is meshed with the worm sleeve (303). The bottom of the outer wall of the turbine (310) is fixedly connected with a U-shaped cleaning rod (311). The upper part of the outer wall of the output sleeve (309) passes through the outer cylinder (1) and is fixedly connected with a scraper rod (312). The end of the scraper rod (312) away from the output sleeve (309) is fixedly connected with a Z-shaped cleaning rod (313).

2. The casing straightening device for oil well drilling and cementing according to claim 1, characterized in that: A hinge seat 2 (4) is provided above each of the four hinge seats 1 (3), and the hinge seat 2 (4) is fixedly connected to the outer wall of the outer cylinder 1 (1).

3. The casing straightening device for oil well drilling and cementing according to claim 1, characterized in that: The left and right parts of the outer walls of the sleeve 1 (302) and the sleeve 2 (306) are provided with connecting belts (307), and the connecting belts (307) pass through the left and right parts of the inner wall of the hinge seat 2 (4).

4. The casing straightening device for oil well drilling and cementing according to claim 2, characterized in that: A limiting groove (5) is provided inside the top of the second hinge seat (4) on one side, a spring (6) is provided inside the limiting groove (5), an end of the spring (6) away from the limiting groove (5) is fixedly connected to a limiting block (7), an end of the limiting block (7) away from the spring (6) passes through the second hinge seat (4) and is fixedly connected to a mounting plate (8), and the mounting plate (8) passes through the limiting block (7) away from the limiting block and cooperates with the straightening rod (304).

5. The casing straightening device for oil well drilling and cementing according to claim 4, characterized in that: A fixing rod (9) is passed through and fixedly connected to the middle of one end of the mounting plate (8) away from the limiting block (7), and the outer wall of the fixing rod (9) passes through the straightening rod (304) and is rotatably connected to the straightening rod (304).

6. The casing straightening device for oil well drilling and cementing according to claim 3, characterized in that: The middle part of the hinge seat 2 (4) is rotatably connected to the rotating rod 1 (10), the outer wall of the rotating rod 1 (10) is fixedly connected to the elastic sheet (11), and the outer wall of the elastic sheet (11) is rotatably connected to the ball (13).

7. The casing straightening device for oil production and cementing according to claim 1, characterized in that: An outer cylinder 2 (16) is provided below the outer cylinder 1 (1), and the four sides of the outer wall of the outer cylinder 2 (16) are fixedly connected to the hinge seat 3 (14), and the middle part of the hinge seat 3 (14) on one side is rotatably connected to the rotating rod 2 (15), and the outer wall of the rotating rod 2 (15) is fixedly connected to the end of the elastic sheet (11) away from the ball (13).

8. The casing straightening device for oil well drilling and cementing according to claim 6, characterized in that: The tops of the four elastic sheets (11) are each provided with a groove (12), and the groove (12) is matched with the straightening rod (304).

9. The casing straightening device for oil well drilling and cementing according to claim 1, characterized in that: The inner walls of the outer cylinder 1 (1) and the outer cylinder 2 (16) are sleeved with an oil production pipe (17).

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