A hydraulic activated pipe scraper usable in open hole drilling

Abstract

The application belongs to the technical field of drilling equipment, and particularly relates to a hydraulic activated pipe scraper for open hole drilling, which comprises a sleeve body, installation grooves are formed on the two sides of the surface of the sleeve body, a blade is installed at one end of an installation frame, and a sliding connection structure is arranged between the installation frame and the installation grooves. When the device is lowered to a target position and needs to perform pipe scraping operation, the solenoid is electrified to generate magnetic adsorption to adsorb the iron ring and move it downwards, the moving block is stretched to stretch the reset spring, the pressure rod and the first piston block are simultaneously moved downwards, the first piston block extrudes the hydraulic oil in the hydraulic groove, the hydraulic oil enters the inside of each supporting sleeve through the liquid passage, the second piston block is pushed to move the supporting rod to the outside of the installation groove, the supporting rod pushes the connecting plate, and then the blade is pushed out of the installation groove so that the blade is tightly attached to the pipe wall to perform the pipe scraping operation, and the scaling, cement blocks and other impurities on the pipe wall are scraped and cleaned.

Description

Technical Field

[0001] This invention relates to the field of drilling equipment technology, and more specifically to a hydraulically activated scraper that can be used for open-hole drilling. Background Technology

[0002] With the continuous development of drilling technology, deep wells and ultra-deep wells have become the focus of drilling development. Due to the complexity of formation conditions and construction technology, the inner wall of the casing is often covered with a large amount of cement blocks, cement rings, hard wax, various salt crystals or deposits, perforation burrs, and iron oxide produced after casing corrosion. This makes it impossible to smoothly lower various downhole tools such as fishing tubes, centralizers, and packers. Generally, the inner wall of the casing is cleaned, i.e., the casing scraping operation is adopted.

[0003] While existing hydraulically activated scrapers can meet basic user needs to a certain extent, their design still has some significant flaws and limitations in practical applications. Specifically, the scraper's blades are typically embedded and fixed in the structures on both sides of the scraper's surface. While this fixing method ensures the stability of the blades during operation, it also brings significant maintenance challenges. When the blades need to be replaced due to long-term wear or accidental damage, operators cannot perform a simple in-situ replacement; instead, the entire main structure of the hydraulically activated scraper must be opened to access and disassemble the internally fixed blades. This process is not only cumbersome and time-consuming, increasing the complexity and safety risks of on-site operations, but more seriously, it greatly slows down the overall maintenance and replacement process, leading to extended equipment downtime and severely impacting the continuity of drilling operations and overall work efficiency. Summary of the Invention

[0004] To overcome the above-mentioned technical problems, the present invention aims to provide a hydraulically activated scraper for open-hole drilling, comprising a sleeve, wherein mounting grooves are provided on both sides of the surface of the sleeve, a mounting frame is movably inserted inside the mounting groove, a blade is mounted on one end of the mounting frame, a sliding connection structure is provided between the mounting frame and the mounting groove, connecting components are provided at both ends of the sleeve, and a hydraulic structure is provided inside the sleeve.

[0005] Preferably, the hydraulic structure includes a hydraulic groove, which is located in the middle of the inner part of the sleeve. A movable groove is provided at the upper end of the inner part of the sleeve. A movable block is slidably installed inside the movable groove. A return spring connected to the upper end of the inner wall of the movable groove is fixedly installed at the upper end of the movable block.

[0006] Preferably, a pressure rod is fixedly installed at the lower end of the movable block, the lower end of the pressure rod is movably inserted into the interior of the hydraulic groove and a first piston block is installed thereon, an adsorption iron ring is fixedly installed at the lower end of the movable block, and an electromagnetic coil is installed at the lower end of the interior of the movable groove, the electromagnetic coil cooperating with the adsorption iron ring.

[0007] Preferably, multiple support sleeves are installed on one side of the mounting groove, one end of each support sleeve is movably inserted with a support rod, one end of each support rod extends to the outside of the support sleeve and is fitted with a connecting piece, the connecting piece being in contact with one side of the blade.

[0008] Preferably, the support sleeve and support rod are fitted with support springs that are connected to the connecting piece and the inner wall of the mounting groove, the other end of the support rod is provided with a second piston block, and one end of the support sleeve is provided with a fluid passage groove connected to the hydraulic groove.

[0009] Preferably, the sliding connection structure includes an assembly groove, which is formed on both sides of the mounting frame. The assembly groove is U-shaped. Limiting grooves connected to the assembly groove are formed on both sides of the inner wall of the mounting frame. A fixing guide rod is fixedly installed inside the mounting groove and passes through the two assembly grooves.

[0010] Preferably, a double-threaded screw is rotatably installed inside the fixed guide rod, and both ends of the double-threaded screw are fitted with threaded movable sleeves. Both ends of the fixed guide rod are movably fitted with limiting rings connected to the movable sleeves, and the limiting rings are movably inserted inside the limiting grooves.

[0011] Preferably, the sleeve body has an adjustment groove inside, and grooves are formed on both sides of the surface of the sleeve body. A rotating rod is rotatably installed on one side of the groove, and one end of the rotating rod extends into the interior of the adjustment groove. The upper end of the double-threaded screw extends into the interior of the adjustment groove and is connected to the rotating rod in a transmission manner. A sealing block is detachably installed on one side of the groove.

[0012] The beneficial effects of this invention are:

[0013] 1. In this invention, when the device is lowered to the target position for pipe scraping, the solenoid coil is energized, generating magnetic attraction to draw the iron ring downwards. This causes the moving block to stretch the reset spring, simultaneously moving the pressure rod and the first piston block downwards. The first piston block squeezes the hydraulic oil inside the hydraulic groove, and the hydraulic oil enters each support sleeve through the fluid passage. This pushes the second piston block, causing the support rod to move outwards from the mounting groove. The support rod pushes the connecting piece, thereby pushing the blade out of the mounting groove, allowing the blade to adhere to the pipe wall for pipe scraping. This completes the scraping and cleaning of scale, cement blocks, and other impurities on the pipe wall. After the operation is completed, the solenoid coil is de-energized, the magnetism disappears, the reset spring pushes the moving block to reset, causing the first piston block to move back. The pressure inside the hydraulic groove decreases, the support spring rebounds, pulling the support rod and the blade back to reset. After the blade retracts into the mounting groove, drilling can proceed normally, avoiding scraping against the well wall during the drilling process.

[0014] 2. In this invention, the user can open the sealing block at the groove according to the actual installation requirements of the mounting frame, and use a tool to rotate the rotating rod. Through the transmission action, the double-threaded screw will rotate inside the fixed guide rod. After the double-threaded screw rotates, it will drive the moving threaded sleeves at both ends to move closer or further away from each other, thereby driving the two limiting rings to move synchronously. Adjusting the distance between the two limiting rings extending out of the fixed guide rod adapts to different specifications of mounting frames, completing the adjustment of the position and installation gap of the mounting frame. At the same time, the fixed guide rod plays a limiting and guiding role for the assembly groove, which can improve the stability of the mounting frame during the telescopic movement, and prevent the blade from deflecting during the operation, affecting the scraping effect. After the adjustment is completed, the groove can be resealed, which facilitates the overall maintenance of the device and the replacement of parts. Attached Figure Description

[0015] The invention will now be further described with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the half-section structure of the side portion of the present invention;

[0018] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle;

[0019] Figure 4 For the present invention Figure 2 Enlarged structural diagram at point B;

[0020] Figure 5 This is a schematic diagram of the side half-section structure of the support spring of the present invention;

[0021] In the diagram: 1. Sleeve; 2. Blade; 3. Mounting groove; 4. Hydraulic groove; 5. Fluid passage groove; 6. Mounting frame; 7. Assembly groove; 8. Limiting groove; 9. Fixed guide rod; 10. Double-threaded screw; 11. Moving threaded sleeve; 12. Limiting ring; 13. Adjusting groove; 14. Groove; 15. Rotating rod; 16. Sealing block; 17. Movable groove; 18. Moving block; 19. Return spring; 20. Adsorption iron ring; 21. Pressure rod; 22. First piston block; 23. Electromagnetic coil; 24. Support rod; 25. Support sleeve; 26. Second piston block; 27. Connecting piece; 28. Support spring. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1 to 4 As shown, a hydraulically activated scraper for open-hole drilling includes a conveyor frame 1, a conveyor belt 2 inside the conveyor frame 1, a frame 3 at the upper end of the conveyor frame 1, an installation rail 6 on the other side of the upper end inside the frame 3, two sliding seats 15 movably fitted on the surface of the installation rail 6, a glue spraying frame 7 installed at the lower end of the sliding seats 15, a movable plate 16 movably installed inside the glue spraying frame 7, a telescopic rod 17 installed at the upper end of the movable plate 16, a glue nozzle 19 installed at the lower end of the movable plate 16, a glue tube 18 installed on one side of the glue nozzle 19, and a discharge hole 20 opened in the middle of the lower end of the glue spraying frame 7. Rubber baffles 21 are provided on both sides inside the discharge hole 20, and the four rubber baffles 21 are all triangular.

[0024] In this embodiment, the corrugated cardboard is placed smoothly on the conveyor belt 2. As the conveyor belt 2 moves slowly, when it reaches the position directly below the spraying rack, the telescopic rod 17 in the system begins to function, driving the moving plate 16 to move downwards precisely. During this process, the moving plate 16 further drives the glue nozzle 19 to move downwards synchronously until the glue nozzle 19 completely penetrates the discharge hole 20 and exposes its nozzle portion. In this way, the glue nozzle 19 can be aligned with the surface of the corrugated cardboard for a uniform and precise glue spraying operation. After the glue spraying task is completed, the telescopic rod 17 starts again, this time carrying... The movable plate 16 moves upward, and at the same time, the movable plate 16 also moves the glue nozzle 19 upward until the glue nozzle 19 is completely pulled out of the discharge hole 20. At this time, the rubber baffle 21 inside the discharge hole 20 will automatically return to its original position, effectively blocking the discharge hole 20 and preventing residual glue inside the glue nozzle 19 from accidentally dripping. This design cleverly avoids glue dripping onto the conveyor belt 2, thereby ensuring the cleanliness of the conveying environment and preventing unnecessary pollution and impact on the corrugated cardboard, ensuring the smooth progress of the entire production process and the stability of product quality.

[0025] Please see Figure 4 and Figure 5 As shown, a hydraulically activated scraper for open-hole drilling is provided. A scraping structure is provided on one side of the glue spraying frame 7. The scraping structure includes a mounting frame 22, which is fixedly installed on one side of the glue spraying frame 7. Slide rods 23 are fixedly installed on both sides inside the mounting frame 22. A lifting screw 24 is rotatably installed in the middle inside the mounting frame 22. A moving block 25 is movably sleeved on the surface of the lifting screw 24 and the slide rod 23. A scraper plate 26 is fixedly installed on one side of the moving block 25. The lower end of the scraper plate 26 is lower than the lower end of the glue spraying frame 7.

[0026] In this embodiment, when the glue is evenly sprayed through the carefully designed glue nozzle 19 and falls onto the surface of the corrugated cardboard on the continuously running conveyor belt 2, it then passes through a crucial scraper 26. The main function of this scraper 26 is to evenly spread the glue, which may have been unevenly distributed, into a uniform thickness through its flat scraping surface. This meticulous treatment not only ensures that the glue is evenly covered on the surface of the corrugated cardboard, but also lays a solid foundation for subsequent adhesion work, effectively preventing the problem of poor adhesion caused by uneven glue distribution.

[0027] Meanwhile, to further enhance operational flexibility and precision, users can make fine adjustments by manually rotating the lifting screw 24. During this process, the moving block 25 moves smoothly along a predetermined track under the coordinated action of the thread of the lifting screw 24 and the slide bar 23. This design allows users to easily adjust the height of the lower end of the scraper 26, thereby achieving precise control over the adhesive thickness and ensuring that each scraping operation achieves the expected results, further improving overall adhesion quality and work efficiency.

[0028] Please see Figures 2 to 4 As shown, a hydraulically activated scraper for open-hole drilling is provided. An adjustment structure is provided between two sliding seats 15 and the mounting rail 6. The adjustment structure includes a first adjusting screw 13 and a second adjusting screw 14. The first adjusting screw 13 and the second adjusting screw 14 are movably installed on both sides inside the mounting rail 6. The two sliding seats 15 are movably sleeved on the surfaces of the first adjusting screw 13 and the second adjusting screw 14. One end of the first adjusting screw 13 and the second adjusting screw 14 is movably inserted through the outside of the frame 3 and is equipped with a rotating handle. The surfaces of the two sliding seats 15 are provided with threaded holes. One side of the sliding seat 15 is threadedly connected to the first adjusting screw 13 through the threaded hole, and the other side of the sliding seat 15 is threadedly connected to the second adjusting screw 14 through the threaded hole.

[0029] In this embodiment, the sliding seat 15 is designed to move freely on the smooth surface of the mounting rail 6. The user manually rotates the handle to rotate the first adjusting screw 13. During this process, the sliding seat 15 on one side of the adjusting screw moves smoothly along the preset path of the first adjusting screw 13 and the mounting rail 6 under the precise engagement of the threaded hole. This design cleverly achieves flexible adjustment of the position of the glue sprayer 7 on that side. Similarly, the user can also operate the second adjusting screw 14 by rotating the handle. At this time, the sliding seat 15 on the other side also moves orderly along the second adjusting screw 14 and the mounting rail 6 under the guidance of the threaded hole, making it convenient for the user to finely adjust the position of the sliding seat 15 on this side. Through this bidirectional adjustment mechanism, not only are the positions of the sliding seats 15 on both sides and the glue sprayer 7 accurately aligned, but the convenience of adjustment is also greatly improved. Thus, according to actual needs, precise and uniform glue spraying can be performed on different specific positions of the corrugated cardboard, ensuring the efficiency and precision of the glue spraying process.

[0030] Please see Figure 1 and Figure 2As shown, a hydraulically activated scraper for open-hole drilling is provided on one side of the upper end of the frame 3. The pressure structure includes a movable pressure plate 4, which is movably installed inside the frame 3. One end of the movable pressure plate 4 is rotatably connected to the frame 3. One end of the movable pressure plate 4 has an installation groove. A conveying pressure roller 5 is rotatably installed inside the installation groove. A driver connected to the conveying pressure roller 5 is provided on one side of the movable pressure plate 4. Fixing strips 8 are fixedly installed on both sides of the upper end of the frame 3. Two guide rods 9 are fixedly installed between the two fixing strips 8. A sliding sleeve 10 is movably sleeved on the surface of the guide rod 9. A movable support rod 11 is movably installed on one side of the sliding sleeve 10. One end of the movable support rod 11 is movably connected to the movable pressure plate 4. A support spring 12 connected to the sliding sleeve 10 is sleeved on the surface of the guide rod 9.

[0031] In this embodiment, the corrugated cardboard is placed smoothly on the conveyor belt 2. As the conveyor belt 2 continues to operate, the corrugated cardboard gradually moves to the predetermined position of the movable pressure roller. At this time, the driver starts and drives the movable pressure roller to rotate. The rotating surface of the movable pressure roller is in close contact with the upper part of the corrugated cardboard. This process not only ensures the smooth conveying of the corrugated cardboard, but also lays the foundation for the subsequent flattening operation. At the same time, the support spring 12 plays a key role, which strongly supports the sliding sleeve 10 and keeps it stable. The sliding sleeve 10 applies appropriate pressure to the movable pressure plate 4 through the connected movable support rod 11, so that the movable pressure roller can be tightly pressed against the upper part of the corrugated cardboard. This pressing action effectively flattens the protruding parts of the corrugated cardboard surface, making its surface smoother. This not only facilitates further flattening of the corrugated cardboard, but also greatly improves the uniformity of the corrugated cardboard during the gluing process, ensuring the ideal gluing effect, which is more conducive to the overall quality and use effect of the corrugated cardboard.

[0032] It should be noted that any parts of this invention not covered or not disclosed in detail are the same as or implemented using existing technology. This invention does not improve upon these parts and does not affect the integrity of the invention.

[0033] Working principle: Corrugated cardboard is placed on conveyor belt 2. When it moves to the position of the movable pressure roller, the driver drives the movable pressure roller to rotate, contacting the upper end of the corrugated cardboard for easy conveying. Support spring 12 supports sliding sleeve 10, and sliding sleeve 10 squeezes movable pressure plate 4 through movable support rod 11, so that the movable pressure roller can press against the upper end of the corrugated cardboard, flattening the protruding part of the corrugated cardboard, which is more conducive to flattening the corrugated cardboard and more conducive to uniform glue application. When it moves to the bottom of the spray frame, telescopic rod 17 drives moving plate 16 downward, moving plate 16 drives glue nozzle 19 downward, so that glue nozzle 19 penetrates... The glue nozzle 19 sprays glue onto the corrugated cardboard through the discharge hole 20. After spraying, the telescopic rod 17 moves the moving plate 16 upward, which in turn moves the glue nozzle 19 upward, pulling it out of the discharge hole 20. The rubber baffle 21 inside the discharge hole 20 returns to its original position, blocking the discharge hole 20 and preventing glue dripping from the nozzle 19 onto the conveyor belt 2, which could affect the conveying environment and the corrugated cardboard. When the glue passes through the nozzle 19 onto the corrugated cardboard on the conveyor belt 2, the scraper 26 can scrape the glue to a uniform thickness, facilitating better adhesion later and preventing uneven glue on the surface of the corrugated cardboard, which would affect the adhesion effect.

[0034] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] The above description is merely an example and illustration of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A hydraulically activated scraper for use in open-hole drilling, comprising a sleeve (1), characterized in that, The sleeve (1) has mounting grooves (3) on both sides of its surface. A mounting frame (6) is inserted into the mounting groove (3). A blade (2) is installed at one end of the mounting frame (6). A sliding connection structure is provided between the mounting frame (6) and the mounting groove (3). Connecting components are provided at both ends of the sleeve (1). A hydraulic structure is provided inside the sleeve (1).

2. The hydraulically activated scraper for open-hole drilling according to claim 1, characterized in that, The hydraulic structure includes a hydraulic groove (4), which is located in the middle of the sleeve (1). The upper end of the sleeve (1) is provided with a movable groove (17). A movable block (18) is slidably installed inside the movable groove (17). A reset spring (19) connected to the upper end of the inner wall of the movable groove (17) is fixedly installed at the upper end of the movable block (18).

3. A hydraulically activated scraper for open-hole drilling according to claim 2, characterized in that, A pressure rod (21) is fixedly installed at the lower end of the movable block (18). The lower end of the pressure rod (21) is movably inserted into the interior of the hydraulic groove (4) and a first piston block (22) is installed thereon. An adsorption iron ring (20) is fixedly installed at the lower end of the movable block (18). An electromagnetic coil (23) is installed at the lower end of the interior of the movable groove (17). The electromagnetic coil (23) cooperates with the adsorption iron ring (20).

4. A hydraulically activated scraper for open-hole drilling according to claim 3, characterized in that, Multiple support sleeves (25) are installed on one side inside the mounting groove (3). A support rod (24) is movably inserted at one end of the support sleeve (25). One end of the support rod (24) extends to the outside of the support sleeve (25) and is equipped with a connecting piece (27). The connecting piece (27) is attached to one side of the blade (2).

5. A hydraulically activated scraper for open-hole drilling according to claim 4, characterized in that, The support sleeve (25) and support rod (24) are fitted with support springs (28) that are connected to the inner wall of the connecting piece (27) and the mounting groove (3). The other end of the support rod (24) is provided with a second piston block (26). One end of the support sleeve (25) is provided with a fluid passage groove (5) that is connected to the hydraulic groove (4).

6. A hydraulically activated scraper for open-hole drilling according to claim 1, characterized in that, The sliding connection structure includes an assembly groove (7), which is opened on both sides of the mounting frame (6). The assembly groove (7) is U-shaped. Limiting grooves (8) connected to the assembly groove (7) are opened on both sides of the inner wall of the mounting frame (6). A fixed guide rod (9) is fixedly installed inside the mounting groove (3). The fixed guide rod (9) passes through the two assembly grooves (7).

7. A hydraulically activated scraper for open-hole drilling according to claim 1, characterized in that, The fixed guide rod (9) is rotatably mounted with a double-threaded screw (10). Both ends of the double-threaded screw (10) are fitted with threaded movable sleeves (11). Both ends of the fixed guide rod (9) are movably fitted with limiting rings (12) connected to the movable sleeves (11). The limiting rings (12) are movably inserted into the limiting groove (8).

8. A hydraulically activated scraper for open-hole drilling according to claim 7, characterized in that, The sleeve (1) has an adjustment groove (13) inside. Both sides of the surface of the sleeve (1) have grooves (14). A rotating rod (15) is rotatably installed on one side of the groove (14). One end of the rotating rod (15) extends into the interior of the adjustment groove (13). The upper end of the double-threaded screw (10) extends into the interior of the adjustment groove (13) and is connected to the rotating rod (15) in a transmission manner. A sealing block (16) is detachably installed on one side of the groove (14).

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