Adjustable reamer

Abstract

The utility model discloses an adjustable reamer which comprises a shell, a center pipeline is arranged in the shell, a locking ring is arranged at the upper end of the center pipeline, a second spring is arranged on the outer side of the upper portion of the center pipeline in a sleeved mode, a gear rack shaft is arranged outside the center pipeline in a sleeved mode, and a gear rack shaft outer sleeve is arranged outside the gear rack shaft in a sleeved mode. A gear rack is arranged at the upper end of the gear rack shaft outer sleeve, the gear rack on the gear rack shaft outer sleeve is matched with a gear on the gear shaft, a bearing is further arranged outside the upper end of the gear rack shaft outer sleeve, the gear shaft is arranged on the bearing in a sleeved mode, a gear shaft outer sleeve is arranged outside the gear shaft, and the gear shaft outer sleeve is installed on a threaded hole of the shell. The size of the extending cutter block can be adjusted, reaming operation of various sizes can be completed, and the adjusting mode is simple and can be completed on the platform.

Description

Technical Field

[0001] The utility model relates to the technical field of eye reamer, in particular to an adjustable eye reamer. Background Art

[0002] With the deepening of understanding of oil and gas accumulation mechanism and the deepening of oil and gas field development, the problems encountered in drilling are becoming more and more complicated. The solution of these complex problems is increasingly dependent on the development of tools and the improvement of means. The hole expansion while drilling technology is proposed and developed based on this background. The so-called hole expansion while drilling technology is a drilling technology that uses hole expansion while drilling tools and conventional drill bit programs to expand the wellbore while drilling comprehensively.

[0003] At present, the existing reamer can only complete the reaming operation of a single size, it is not convenient to adjust the cutter block, and the reamer is easy to open when not working, which has low safety.

[0004] Therefore, an adjustable eye reamer is proposed to solve the above problems. Utility Model Content

[0005] The utility model aims at an adjustable eye expander, comprising a shell, a center pipe is arranged inside the shell, a locking ring is arranged at the upper end of the center pipe, a spring 2 is sleeved on the outer side above the center pipe, a gear bar shaft is sleeved on the outer side of the center pipe, a gear bar shaft sleeve is sleeved on the outer side of the gear bar shaft, a gear bar is arranged on the upper end of the gear bar shaft sleeve, the gear bar on the gear bar shaft sleeve cooperates with the gear on the gear shaft, a bearing is also arranged on the outer side of the upper end of the gear bar shaft sleeve, the gear shaft sleeve is on the bearing, a gear shaft sleeve is arranged on the outer side of the gear shaft, the gear shaft sleeve is installed on the threaded hole of the shell, a guide rail groove is opened at the center position of the gear bar shaft sleeve, and a guide rail eye is arranged on the inner wall of the shell body at the corresponding position of the guide rail groove. The guide eye screws the guide pin into the guide groove, a spring 1 is provided at the lower end of the gear shaft sleeve, a spring ring is provided below the spring 1, a spring guide block is provided below the spring ring, a knife block is provided below the spring guide block, an alloy block is welded on the outside of the knife block, a driving ring is provided below the knife block, a driving block is provided below the driving ring, a threaded connection with the piston is provided below the driving block, a nozzle 1 and a nozzle 2 are provided on the outer shell on the outside below the piston, an anti-collision sleeve is provided below the nozzle 1 and the nozzle 2, a pipe sleeve is provided below the piston, the pipe sleeve is sealed and connected to the central pipe by multiple pipe sealing rings, a ball seat is provided below the central pipe, and the inner arc surface of the ball seat is sealed and fitted with the outer arc surface of the opening ball.

[0006] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0007] The utility model can adjust the size of the knife block after it is extended, and can complete hole enlarging operations of various sizes, and the adjustment method is simple and can be completed on the platform.

[0008] The utility model is provided with a spring capable of retrieving the cutter block at the lower end of the gear bar shaft outer sleeve, so that the cutter block can be ensured to be in a retrieving state when the reamer is lowered into the well and retrieved, so as to ensure that the cutter block will not be damaged.

[0009] The inner arc surface of the ball seat of the utility model is sealed with the outer arc surface of the opening ball, which can ensure that the central pipeline is not connected with the piston before the ball is thrown, thereby ensuring that the reamer will not be accidentally opened in the state of not throwing the ball. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0011] Figure 2 It is a cross-sectional view of the initial state of the utility model;

[0012] Figure 3 This is a cross-sectional view of the utility model in an unopened state after pitching;

[0013] Figure 4 It is a cross-sectional view of the utility model in the open state after pitching.

[0014] The reference numerals and names in the figures are as follows:

[0015] 1. Housing; 2. Knife block; 3. Alloy block; 4. Drive ring; 5. Drive block; 6. Piston; 7. Hexagonal bolt; 8. Spring ring; 9. Spring guide block; 10. Pipe sleeve; 11. Nozzle 1; 12. Piston seal 1; 13. Nozzle 2; 14. Anti-collision sleeve; 15. Guide pin; 16. Spring 1; 17. Center pipe; 18. Seal ring retaining ring; 19. Pipe seal; 20. Piston seal 2; 21. Piston seal 3; 22. Gear shaft sleeve seal; 23. Piston seal 4; 24. Lock ring; 25. Gear shaft sleeve; 26. Gear shaft; 27. Gear shaft sleeve; 28. Bearing; 29. ​​Gear shaft seal; 30. Opening ball; 31. Spring 2. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] As attached Figure 1 , 2 As shown, the adjustable eye expander provided by the utility model comprises a shell 1, a center pipe 17 is arranged inside the shell 1, a lock ring 24 is arranged on the upper end of the center pipe 17, a spring 2 31 is sleeved on the outer side above the center pipe 17, a gear bar shaft is sleeved on the outer side of the center pipe 17, a gear bar shaft sleeve 25 is sleeved on the outer side of the gear bar shaft, a gear bar is arranged on the upper end of the gear bar shaft sleeve 25, the gear bar on the gear bar shaft sleeve 25 cooperates with the gear on the gear shaft 16, a bearing 28 is further arranged on the outer side of the upper end of the gear bar shaft sleeve 25, the gear shaft 16 is sleeved on the bearing 28, a gear shaft sleeve 27 is arranged on the outer side of the gear shaft 16, the gear shaft sleeve 27 is installed on the threaded hole of the shell 1, a guide rail groove is opened at the center position of the gear bar shaft sleeve 25, a guide rail eye is arranged on the inner wall of the outer shell 1 at the corresponding position of the guide rail groove, and the guide rail eye The guide pin 15 is screwed into the guide groove, and a spring 16 is arranged at the lower end of the gear shaft sleeve 25, and a spring ring 8 is arranged below the spring 16, and a spring guide block 9 is arranged below the spring ring 8, and a knife block 2 is arranged below the spring guide block 9, and an alloy block 3 is welded on the outer side of the knife block 2, and a driving ring 4 is arranged below the knife block 2, and a driving block 5 is arranged below the driving ring 4, and a threaded connection with the piston 6 is arranged below the driving block 5, and a nozzle 11 and a nozzle 2 13 are arranged on the outer shell 1 below the piston 6, and an anti-collision sleeve 14 is arranged below the nozzle 11 and the nozzle 2 13, and a pipe sleeve 10 is arranged below the piston 6, and the pipe sleeve 10 is sealed and connected to the central pipe 17 through multiple pipe sealing rings 19, and a ball seat is arranged below the central pipe 17, and the inner arc surface of the ball seat is sealed and fitted with the outer arc surface of the opening ball 30.

[0018] Specifically, the spring ring 8 and the spring guide block 9 are connected via a hexagonal bolt 7 .

[0019] Specifically, a gear shaft sleeve sealing ring 22 is arranged between the gear shaft sleeve 25 and the inner side wall of the housing 1 , and a sealing ring retaining ring 18 is arranged outside the gear shaft sleeve sealing ring 22 .

[0020] Specifically, the spring 1 16 and the spring 2 31 are both arranged between the gear shaft sleeve 25 and the central pipe 17 .

[0021] Specifically, there are multiple alloy blocks 3, which are evenly welded on the blade block 2 from top to bottom in groups of two.

[0022] Specifically, a piston sealing ring 12 is arranged between the top of the piston 6 and the inner wall of the outer shell 1, a piston sealing ring 20 and a piston sealing ring 3 21 are respectively arranged between the piston 6 and the central pipe 17), and a piston sealing ring 4 23 is arranged between the middle position of the piston 4 and the inner wall of the outer shell 1.

[0023] Specifically, a gear shaft sealing ring 29 is provided between the gear shaft 26 and the gear shaft sleeve 27 .

[0024] Working principle: When the reamer is lowered to the working position, the opening ball 30 is dropped from the well, and the opening ball 30 falls on the ball seat at the lower end of the central pipe 17 to form a seal. Figure 3 As shown, after the central pipe 17 is sealed, pressure is injected into the tool, and the pressure in the central pipe 17 rises. When the pressure in the central pipe 17 is large enough, the central pipe 17 overcomes the elastic force of the spring 2 31 and moves downward. When the hole opened below the central pipe 17 passes through the pipe sealing ring 19 and aligns with the groove structure on the pipe jacket 10, it reaches the open state, as shown in the attached figure. Figure 4 As shown;

[0025] After reaching the open state, the pressure in the central pipe 17 is transmitted to the piston cylinder of the piston 6 through the multiple through holes opened on the pipe jacket 10. After the pressure in the piston cylinder rises and reaches a sufficiently large value, the piston cylinder will push the cutter block 2 to expand. When the spring ring 8 contacts the gear shaft jacket 25, it reaches the maximum position, and then the hole expansion operation begins. During the operation, the nozzle 2 13 also continuously sprays water to flush the cutter block 2;

[0026] After the operation is completed, the injection pressure into the center pipe 17 is stopped. After the injection pressure is stopped, the piston 6 loses the thrust, and the knife block 2 is retracted into the shell 1 under the action of the elastic force of the spring 16. The center pipe 17 also returns to the closed position under the action of the spring 16. After the reamer is recovered, the guide pin 15 is rotated out of the guide groove on the gear shaft sleeve 25, the fixation of the gear shaft sleeve 25 is released, the gear sleeve is rotated on the gear shaft 26, and the position of the gear shaft sleeve 25 is changed. After reaching a certain position, the guide pin 15 is screwed in again to fix the gear shaft sleeve 25 to complete the operation of changing the knife block 2. The above operation is very simple and can be completed on the platform.

[0027] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. An adjustable eye expander, comprising a housing (1), characterized in that: A central pipe (17) is arranged inside the housing (1), a locking ring (24) is arranged at the upper end of the central pipe (17), a spring 2 (31) is sleeved on the outer side of the upper side of the central pipe (17), a gear bar shaft is sleeved on the outer side of the central pipe (17), a gear bar shaft sleeve (25) is sleeved on the outer side of the gear bar shaft, a gear bar is arranged on the upper end of the gear bar shaft sleeve (25), the gear bar on the gear bar shaft sleeve (25) cooperates with the gear on the gear shaft (26), and the gear bar on the gear bar shaft sleeve (25) cooperates with the gear on the gear shaft (26). A bearing (28) is also arranged outside the upper end of the gear bar shaft sleeve (25), the gear shaft (26) is sleeved on the bearing (28), a gear shaft sleeve (27) is arranged outside the gear shaft (26), the gear shaft sleeve (27) is installed on the threaded hole of the housing (1), a guide rail groove is opened at the center of the gear bar shaft sleeve (25), and a guide rail eye is arranged on the inner wall of the housing (1) at the corresponding position of the guide rail groove, and the guide rail eye screws the guide pin (15) into the guide rail groove, and the gear bar shaft sleeve (25) is provided outside the gear bar shaft. A spring (16) is arranged at the lower end of the sleeve (25), a spring ring (8) is arranged below the spring (16), a spring guide block (9) is arranged below the spring ring (8), a knife block (2) is arranged below the spring guide block (9), an alloy block (3) is welded to the outer side of the knife block (2), a drive ring (4) is arranged below the knife block (2), a drive block (5) is arranged below the drive ring (4), a threaded connection with the piston (6) is arranged below the drive block (5), and the A nozzle 1 (11) and a nozzle 2 (13) are arranged on the outer shell (1) below the piston (6); an anti-collision sleeve (14) is arranged below the nozzle 1 (11) and the nozzle 2 (13); a pipeline sleeve (10) is arranged below the piston (6); the pipeline sleeve (10) is sealedly connected to the central pipeline (17) through a plurality of pipeline sealing rings (19); a ball seat is arranged below the central pipeline (17); the inner arc surface of the ball seat is sealedly fitted with the outer arc surface of the opening ball (30).

2. The adjustable reamer according to claim 1, characterized in that: The spring ring (8) and the spring guide block (9) are connected via a hexagonal bolt (7).

3. The adjustable reamer according to claim 1, characterized in that: A gear shaft outer sleeve sealing ring (22) is arranged between the gear shaft outer sleeve (25) and the inner side wall of the housing (1), and a sealing ring retaining ring (18) is arranged outside the gear shaft outer sleeve sealing ring (22).

4. The adjustable reamer according to claim 1, characterized in that: The spring 1 (16) and the spring 2 (31) are both arranged between the gear shaft outer sleeve (25) and the central pipe (17).

5. The adjustable reamer according to claim 1, characterized in that: The alloy blocks (3) are multiple in number and are evenly welded on the blade block (2) from top to bottom in groups of two.

6. The adjustable reamer according to claim 1, characterized in that: A piston seal ring 1 (12) is arranged between the upper portion of the piston (6) and the inner wall of the outer shell (1), a piston seal ring 2 (20) and a piston seal ring 3 (21) are arranged between the piston (6) and the central pipe (17), and a piston seal ring 4 (23) is arranged between the middle position of the piston (6) and the inner wall of the outer shell (1).

7. The adjustable reamer according to claim 1, characterized in that: A gear shaft sealing ring (29) is arranged between the gear shaft (26) and the gear shaft outer sleeve (27).

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