Multifunctional spiral pipe scraping reamer
Through the design of the multi-functional spiral scraper reamer, the cooperation of the scraper assembly and disc springs, the cleaning and reaming of the inner wall of the casing is achieved without dead corners during drilling, and the problems of borehole reduction and debris impact are solved. , which improves the downward success rate of downhole tools and the sealing success rate of packers, and reduces construction costs.
Patent Information
- Application Number
- CN202421192308.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-29
AI Technical Summary
During the drilling process, the diameter of the wellbore is reduced due to formation extrusion, and cement rings, cement blocks, hard waxes, salt crystals and sediments are attached to the inner wall of the casing, which affects the tool entry and sealing of the sealer, resulting in Long construction time and high cost.
A multi-functional spiral scraper retractor is designed, including a scraper mandrel, an intermediate joint, a blade wing housing and a lower joint. The scraper assembly is installed at a 30° angle, and the disc spring realizes radial shrinkage and expansion. Water eye nozzle and steel ball for synchronous cleaning and eye retraction operations.
360° without dead corner scraping is achieved, reducing the number of times of cleaning up debris alone, improving the tool entry success rate and packer sealing success rate, saving construction time and cost.
Smart Images
Figure CN222276638U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of scraper reamer, in particular to a multifunctional spiral scraper reamer. Background Art
[0002] With the continuous development and improvement of oil drilling and production technology, in the process of offshore and onshore oil and gas drilling and production, due to the complex formations and complex construction processes, the borehole formed by drilling is squeezed by the formation, and the borehole diameter is reduced, resulting in a difficult drilling process. During the start-up of the reaming operation, the inner wall of the casing is often attached with a large amount of cement rings, cement blocks, hard wax, various salt crystals and sediments, burrs, rust, etc., which affect the insertion of various downhole tools. Especially when the annular space between the downhole tool and the inner wall of the casing is small, sufficient scraping will be performed first to improve the success rate of the downhole tool and the success rate of the packer setting during the completion of the well.
[0003] When encountering these problems during the drilling process, it is necessary to pull out the drill and perform another trip of scraping to clean the corresponding position of the inner wall of the casing, and then start the downhole operation of other tools, which is time-consuming and increases the corresponding construction cost.
[0004] Therefore, a multifunctional spiral scraper reamer is proposed to address the above problems. Utility Model Content
[0005] The utility model aims to provide a multifunctional spiral scraper reamer, comprising a scraper mandrel, an intermediate joint, a blade shell and a lower joint, wherein the lower part of the scraper mandrel is threadedly connected to the upper part of the inner part of the intermediate joint, the lower part of the intermediate joint is threadedly connected to the upper part of the inner part of the blade shell, the lower part of the blade shell is threadedly connected to the upper part of the lower joint, the outer part of the scraper mandrel is fixedly provided with three groups of scraper assemblies with a circumferential angle difference of 30°, and two adjacent scraper assemblies are separated by a fixed positioning spacer ring, the scraper assembly comprises a scraper fixed inner sleeve and a scraper fixed outer sleeve, the scraper fixed inner sleeve and the scraper fixed outer sleeve fix the scraper in the knife groove of the scraper fixed outer sleeve at 90°, the bottom of the scraper is provided with a disc spring nail shaft, and the outer part of the disc spring nail shaft is provided with a matching disc spring;
[0006] An inner long shaft is arranged above the cavity opened in the blade wing housing, an inner long shaft outer sleeve is sleeved on the outside of the inner long shaft, a spring sleeve is arranged on the outside of the inner long shaft, the spring sleeve passes through the spring and is fixed at both ends of the spring, a blade wing groove is opened on the outside of the blade wing housing, a blade wing is arranged inside the blade wing groove, the upper and lower ends of the blade wing are respectively connected with the spring ring and the driving ring sleeved on the outside of the inner long shaft, the driving ring is threadedly connected with the piston at the bottom, a water eye nozzle is installed on the blade wing housing on one side below the inner long shaft, the bottom of the inner long shaft is connected with the inner shaft, the outside of the inner shaft is threadedly connected with the inner shaft outer sleeve, one end of the inner shaft is fixed with a ball seat pin, a steel ball is arranged at one end of the ball seat, a nozzle seat is arranged on the inner shaft, the nozzle seat is fixed in the nozzle seat groove opened on the inner shaft by shear nails, and the bottom of the inner shaft is threadedly connected with the inner shaft lower cap.
[0007] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0008] The utility model has a simple structure and is convenient to install and disassemble. By setting three groups of scraper assemblies, a total of 12 blades are evenly installed at a circumferential angle of 30°, so that 360° scraping without dead angles can be achieved, so that some debris generated on the pipe wall during the drilling process does not need to be separately pulled out of the drill and cleaned by the next group of drilling tools. While the hole is being expanded, the part that needs to be cleaned can be directly cleaned, and the hole expansion blade can be adjusted according to different pipe diameters according to the needs of drilling. The scraper can also achieve corresponding radial contraction and expansion under the action of the disc spring. Therefore, this tool can be used to meet the needs of different casings. Corresponding adjustments can be made in the expansion and scraping steps, which can be applied to operations with different pipe diameters. In addition, the cement rings, cement blocks, hard wax, various salt crystals and sediments, burrs, rust, etc. generated on the casing wall during the drilling operation require multiple drilling operations. These operations can be completed in one go using this tool, without the need to reassemble the drilling tools to deal with the debris. During the eye expansion operation, the required debris can be cleaned up simultaneously, thereby increasing the success rate of running other downhole tools, increasing the success rate of setting the packer during completion, improving timeliness, and saving construction costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a cross-sectional view of the utility model;
[0010] Figure 2 yes Figure 1 Enlarged view of point A in the middle;
[0011] Figure 3 It is a schematic diagram of the external structure of the utility model.
[0012] The reference numerals and names in the figures are as follows:
[0013] 1. Scraper mandrel; 2. Straightening inner sleeve; 3. Straightening outer sleeve; 4. Scraper fixed outer sleeve; 5. Scraper fixed inner sleeve; 6. Disc spring pin shaft; 7. Disc spring; 8. Scraper; 9. Fixed positioning spacer ring; 10. Intermediate joint; 11. Blade housing; 12. Blade; 13. Inner long shaft; 14. Inner long shaft outer sleeve; 15. Spring sleeve; 16. Spring; 17. Spring ring; 18. Drive ring; 19. Piston; 20 Inner shaft; 21. Inner shaft outer sleeve; 22. Nozzle seat; 23. Shear pins; 24. Steel ball; 25. Inner shaft lower cap; 26. Water eye nozzle; 27. Lower joint. DETAILED DESCRIPTION
[0014] 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.
[0015] As attached Figure 1-3 As shown, the multifunctional spiral scraper reamer provided by the utility model comprises a scraper core shaft 1, an intermediate joint 10, a blade shell 11 and a lower joint 27, wherein the scraper core shaft 1 is threadedly connected to the upper part of the interior of the intermediate joint 10 at the lower part, the intermediate joint 10 is threadedly connected to the upper part of the interior of the blade shell 11 at the lower part, and the lower part of the blade shell 11 is threadedly connected to the upper part of the lower joint 27 at the lower part, and the scraper core 1 is fixedly provided with three groups of scraper assemblies with a circumferential angle difference of 30° on the outside, and two adjacent scraper assemblies are separated by a fixed positioning spacer ring 9, and the scraper assembly comprises a scraper fixed inner sleeve 5 and a scraper fixed outer sleeve 4, and the scraper fixed inner sleeve 5 and the scraper fixed outer sleeve 4 fix the scraper 8 in the knife groove of the scraper fixed outer sleeve 4 at 90° uniformly, and a disc spring nail shaft 6 is provided at the bottom of the scraper 8, and a matching disc spring 7 is provided on the outside of the disc spring nail shaft 6;
[0016] An inner long shaft 13 is arranged above the cavity opened inside the blade wing housing 11, an inner long shaft outer sleeve 14 is sleeved outside the inner long shaft 13, a spring sleeve 15 is arranged outside the inner long shaft 13, the spring sleeve 15 passes through the spring 16 and is fixed at both ends of the spring 16, a blade wing groove is opened outside the blade wing housing 11, a blade wing 12 is arranged inside the blade wing groove, the upper and lower ends of the blade wing 12 are respectively connected to a spring ring 17 and a drive ring 18 sleeved outside the inner long shaft 13, and the lower end of the drive ring 18 is connected to the piston 1 9 is threadedly connected, a water eye nozzle 26 is installed on the blade shell 11 on one side below the inner long axis 13, the bottom of the inner long axis 13 is connected to the inner shaft 20, the outer part of the inner shaft 20 is threadedly connected to the inner shaft sleeve 21, one end of the inner shaft 20 is fixed with a ball seat pin, one end of the ball seat is provided with a steel ball 24, a nozzle seat 22 is provided on the inner shaft 20, the nozzle seat 22 is fixed in the nozzle seat groove opened on the inner shaft 20 by a shear nail 23, and the lower part of the inner shaft 20 is threadedly connected to the inner shaft lower cap 25.
[0017] Specifically, a cavity is defined inside the scraper core shaft 1 , and a cavity is defined inside the intermediate joint 10 . The cavity of the scraper core shaft 1 is connected to the cavity of the intermediate joint 10 .
[0018] Specifically, the outer sides of the upper and lower ends of the scraper core shaft 1 are respectively provided with a centering inner bushing 2 and a centering outer sleeve 3 .
[0019] Specifically, the inner long shaft 13 is threadedly connected to the inner long shaft sleeve 14, and the connecting end of the inner long shaft 13 and the inner long shaft sleeve 14 is sealed by a sealing ring 1, the inner long shaft sleeve 14 is threadedly connected to the inside of the blade wing housing 11, and the connecting end of the inner long shaft sleeve 14 and the blade wing housing 11 is sealed by a sealing ring 2.
[0020] Specifically, the spring ring 17 is sleeved on the outside below the spring 16 .
[0021] Specifically, the threaded connection between the lower part of the driving ring 18 and the piston 19 is sealed by a sealing ring.
[0022] Specifically, a groove is opened above the inner shaft 20, and the groove is arranged at the connection between the bottom of the inner long shaft 13 and the inner shaft 20. A sealing ring four is arranged inside the groove, and the inner long shaft 13 and the inner shaft 20 are sealed and connected by the sealing ring four.
[0023] Specifically, a through hole is opened in the middle of the ball seat, the diameter of the through hole is smaller than the diameter of the steel ball 24 , and the end of the through hole is sealed and fitted with the steel ball 24 .
[0024] Working principle: The installation steps are as follows:
[0025] Step 1: The scraper core shaft 1 is an integral core shaft. Three groups of scraper assemblies can be installed on the outside of the scraper core shaft 1. Threads are set at both ends of the scraper core shaft 1. The threads at the lower end of the scraper core shaft 1 are connected to the upper end of the middle joint 10. The scraper core shaft 1 is first installed with the straightening inner bushing 2 and the straightening outer sleeve 3, and then the scraper assembly is installed. When installing the scraper assembly, first install the disc spring 7 on the disc spring nail shaft 6, and then put the disc spring nail shaft 6 into the scraper piece fixed inner sleeve 5 and then install the scraper 8 on the disc spring nail shaft 6, and fix it with the scraper piece fixed sleeve 4 to form a scraper assembly. Install the scraper assembly into the scraper core shaft 1 and then follow the fixed positioning spacer ring 9 according to the positioning position. The other two groups of scraper assemblies are installed in turn according to the positioning bosses of the fixed positioning spacer ring 9, separated by the fixed positioning spacer ring 9 in the middle. After the last group is installed, fix it with the straightening inner bushing 2 and the straightening outer sleeve 3 and connect it to the middle joint 10;
[0026] Step 2: Both ends of the blade wing housing 11 are provided with threads and related sealing grooves. The blade wing 12 is first placed in the blade wing groove opened on the blade wing housing 11, the upper end of the blade wing 12 is against the spring ring 17, and the lower end is against the drive ring 18. The inner long shaft 13 is correspondingly threadedly connected with the inner long shaft sleeve 14, and the connecting end is sealed by a sealing ring 1. The spring sleeve 15 is inserted into the inner long shaft 13 and the spring 16 is inserted into the outside of the inner long shaft 13 so that it is located in the spring sleeve 15 and inserted into the blade wing housing 11. The blade wing housing 11 itself is threadedly connected for fixing, and the connecting end of the inner long shaft sleeve 14 and the blade wing housing 11 is sealed by a sealing ring 2. Then, the piston 19 is inserted into the blade wing housing 11 from the other end, and is sleeved on the inner long shaft 13 and threadedly connected to the drive ring 18. The piston 19 is connected to the drive ring 18. The threaded connection is sealed by a sealing ring 3, which can form a seal on the surface of the inner long shaft 13 and the drive ring 18, then the nozzle seat 22 is installed into the inner shaft 20 and fixed in the nozzle seat groove opened on the inner shaft with a shear nail 23, the inner shaft outer sleeve 21 is inserted into the inner shaft 20, the two are connected by threads, the inner shaft lower cap 25 is threadedly connected to one end of the inner shaft 20, the assembled inner shaft is inserted into the blade housing 11 as a whole, a groove is opened above the inner shaft 20, the groove is arranged at the connection between the bottom of the inner long shaft 13 and the inner shaft 20, a sealing ring 4 is arranged inside the groove, the inner long shaft 13 and the inner shaft 20 are sealed and connected by the sealing ring 4, finally the upper end of the blade housing 11 is threadedly connected to the lower part of the intermediate joint 10, the water eye nozzle 26 is installed, and the lower end of the blade housing 11 is connected to the lower joint 27 to form an integral tool;
[0027] During operation: after the scraper reamer is put into the well and enters the casing, the blade of the scraper 8 is tightly fitted with the casing wall due to the action of the disc spring 7. The scraper 8 can ensure good fit to the pipe wall under the action of relative stacking, and will not scrape the pipe wall or get stuck in the casing due to elastic interference. The three groups of scraper assemblies are separated by fixed positioning spacer rings 8 one by one, and straightening structures are provided at both ends. The latter two groups of scraper assemblies are installed on the basis of the former group of scraper assemblies, and are rotated 30° clockwise in the radial direction in sequence. The 12 blades can clean the pipe wall without dead angles, and the pipe wall passed by is cleaned synchronously when the drilling tool starts to descend;
[0028] After the reaming part reaches the corresponding position of the naked eye, the steel ball 24 is put in, and the steel ball 24 sits on the ball seat. The ball seat of the reaming part can slide from the first position to the second position in the cavity of the inner shaft 20. Normally, the ball seat is fixed in the first position by the ball seat pin. In the first position, the ball seat forms a sealed connection with the tube wall around the cavity except for the passage of the through hole itself; after the ball is put in to block the through hole passage, the fluid pressure pushes the ball seat to cut off the ball seat pin and move downward. When it runs to the second position, the pressure enters the piston 19 from the flow hole of the inner shaft 20. After reaching a certain pressure, the piston 19 is pushed against the drive ring 18 to push the blade 12 The outer surface of the blade shell 11 is fixed, and the ball seat and the inner shaft 20 no longer form a seal. The internal channel is opened and the eye expansion operation begins. Both ends of the scraper assembly have a straightening design, and both ends of the scraper are conical structures. After contacting the open hole wall, under the action of the disc spring 7, it can better enter the open hole wall from the casing wall. The expanded open hole can also be cleaned in an all-round way to clean up excess virtual mud cakes, mud blocks, various salt crystals and sediments, etc., to improve the success rate of the packer sealing during completion, and improve the success rate of other downhole tools, so as to achieve an optimized cementing quality and extend the service life of the wellbore.
[0029] 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.
[0030] 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. A multifunctional spiral scraper reamer, comprising a scraper mandrel (1), an intermediate joint (10), a blade housing (11) and a lower joint (27), wherein the lower portion of the scraper mandrel (1) is threadedly connected to the upper portion of the interior of the intermediate joint (10), the lower portion of the intermediate joint (10) is threadedly connected to the upper portion of the interior of the blade housing (11), and the lower portion of the blade housing (11) is threadedly connected to the upper portion of the lower joint (27), characterized in that: The scraper core shaft (1) is fixedly provided with three groups of scraper assemblies with circumferential angles differing by 30 degrees on the outside, and two adjacent scraper assemblies are separated by a fixed positioning spacer ring (9). The scraper assembly comprises a scraper fixed inner sleeve (5) and a scraper fixed outer sleeve (4). The scraper fixed inner sleeve (5) and the scraper fixed outer sleeve (4) fix the scraper (8) in the knife groove of the scraper fixed outer sleeve (4) at 90 degrees. The bottom of the scraper (8) is provided with a disc spring nail shaft (6), and a matching disc spring (7) is provided on the outside of the disc spring nail shaft (6); An inner long axis (13) is arranged above the cavity opened inside the blade wing housing (11), an inner long axis outer sleeve (14) is sleeved outside the inner long axis (13), a spring sleeve (15) is arranged outside the inner long axis (13), the spring sleeve (15) passes through the spring (16) and is fixed to both ends of the spring (16), a blade wing groove is opened outside the blade wing housing (11), a blade wing (12) is arranged inside the blade wing groove, the upper and lower ends of the blade wing (12) are respectively connected to a spring ring (17) sleeved outside the inner long axis (13) and a drive ring (18), and the lower end of the drive ring (18) is connected to the piston (11). 9) threaded connection, a water eye nozzle (26) is installed on the blade shell (11) on one side below the inner long shaft (13), the bottom of the inner long shaft (13) is connected to the inner shaft (20), the outer part of the inner shaft (20) is threadedly connected to the inner shaft outer sleeve (21), one end of the inner shaft (20) is fixed with a ball seat pin, one end of the ball seat is provided with a steel ball (24), a nozzle seat (22) is provided on the inner shaft (20), the nozzle seat (22) is fixed in a nozzle seat groove opened on the inner shaft (20) by a shear nail (23), and the lower part of the inner shaft (20) is threadedly connected to the inner shaft lower cap (25).
2. The multifunctional spiral scraper reamer according to claim 1, characterized in that: The scraper core shaft (1) has a cavity inside, the middle joint (10) has a cavity inside, and the cavity of the scraper core shaft (1) is connected to the cavity of the middle joint (10).
3. The multifunctional spiral scraper reamer according to claim 1, characterized in that: The outer sides of the upper and lower ends of the scraper core shaft (1) are respectively provided with a centering inner bushing (2) and a centering outer sleeve (3).
4. The multifunctional spiral scraper reamer according to claim 1, characterized in that: The inner long shaft (13) is threadedly connected to the inner long shaft outer sleeve (14), and the connecting ends of the inner long shaft (13) and the inner long shaft outer sleeve (14) are sealed by a first sealing ring. The inner long shaft outer sleeve (14) is threadedly connected to the inside of the blade housing (11), and the connecting ends of the inner long shaft outer sleeve (14) and the blade housing (11) are sealed by a second sealing ring.
5. The multifunctional spiral scraper reamer according to claim 1, characterized in that: The spring ring (17) is sleeved on the lower outside of the spring (16).
6. The multifunctional spiral scraper reamer according to claim 1, characterized in that: The threaded connection between the lower part of the driving ring (18) and the piston (19) is connected by three sealing rings.
7. The multifunctional spiral scraper reamer according to claim 1, characterized in that: A groove is provided above the inner shaft (20), and the groove is arranged at the connection between the bottom of the inner long shaft (13) and the inner shaft (20). A sealing ring four is arranged inside the groove, and the inner long shaft (13) and the inner shaft (20) are sealed and connected via the sealing ring four.
8. The multifunctional spiral scraper reamer according to claim 1, characterized in that: A through hole is provided in the middle of the ball seat, the diameter of the through hole is smaller than the diameter of the steel ball (24), and the end of the through hole is sealed and fitted with the steel ball (24).