A device for cleaning a cement buildup from the interior wall of a drill pipe

Abstract

The utility model provides a kind of drilling pipe inner wall cement solidification blockage cleaning equipment, including fixed mechanism, including fixed material frame and self-adapting jaw, self-adapting jaw is used to clamp and fix the drilling pipe to be cleaned;Drill head assembly, it is set to one side of fixed material frame, drill head assembly includes rotatable pneumatic percussion drill head and the hydraulic motor of driving pneumatic percussion drill head rotation;Feed cylinder is connected with drill head assembly, for controlling the feed movement of drill head assembly along the axial direction of drilling pipe;Control unit is set on feed cylinder, and control unit is electrically connected to hydraulic motor with the characteristics of improving the dredging efficiency of cleaning equipment, improving security.

Description

Technical Field

[0001] This utility model relates to oil extraction equipment, specifically to a device for cleaning cement solidification blockage on the inner wall of drill pipe. Background Technology

[0002] In offshore oil drilling operations, the inner wall of drill pipes often requires regular cleaning due to cement buildup. Traditional cleaning methods rely on manual operation of tools such as needle guns and crowbars for physical removal, which is inefficient, labor-intensive, costly, and poses safety hazards. Especially in deep-sea or complex conditions, manual operation is difficult to meet the need for rapid unblocking and can easily damage the inner wall of the drill pipe, affecting equipment lifespan. Therefore, the cleaning process suffers from low efficiency and insufficient safety. Utility Model Content

[0003] The purpose of this utility model is to provide a device for cleaning cement solidification blockage on the inner wall of drill pipes, so as to solve the problems of low unblocking efficiency and insufficient safety of cleaning devices.

[0004] To achieve the above objectives, the present invention provides a drilling pipe inner wall cement solidification blockage cleaning device, which adopts the following technical solution:

[0005] A device for cleaning cement-clogged inner walls of drill pipes, comprising:

[0006] The fixing mechanism includes a fixing rack and an adaptive gripper, the adaptive gripper being used to clamp and fix the drill rod to be cleaned;

[0007] A drill bit assembly is disposed on one side of the fixed material rack. The drill bit assembly includes a rotatable pneumatic impact drill bit and a hydraulic motor for driving the pneumatic impact drill bit to rotate.

[0008] A feed cylinder, connected to the drill bit assembly, is used to control the feed movement of the drill bit assembly along the drill rod axis;

[0009] A control unit is mounted on the feed cylinder and is electrically connected to the hydraulic motor.

[0010] As an optimization of a drill pipe inner wall cement solidification blockage cleaning device, the adaptive gripper includes two arc-shaped gripper arms and a locking bolt. The two arc-shaped gripper arms are arranged opposite each other, the curvature of the arc-shaped gripper arms matches the outer diameter of the drill pipe, and the locking bolt is used to lock the two arc-shaped gripper arms.

[0011] As an optimization of a drill pipe inner wall cement solidification blockage cleaning device, the drill bit assembly also includes at least one extension rod, which is detachably connected between the pneumatic impact drill bit and the hydraulic motor. One end of the extension rod is provided with an external threaded post, and the other end of the extension rod is provided with an internal threaded hole.

[0012] As an optimization of a drill pipe inner wall cement solidification blockage cleaning device, the length of the extension rod is 0.5-1.5m.

[0013] As an optimization of a drill pipe inner wall cement solidification blockage cleaning device, the drill bit assembly also includes a guide rail and a slide. The guide rail extends toward the adaptive gripper, the slide is slidably connected to the guide rail, the telescopic rod of the feed cylinder is fixedly connected to the base of the slide, and the hydraulic motor is fixedly connected to the top surface of the slide.

[0014] As an optimization of a drill pipe inner wall cement solidification blockage cleaning device, the guide rail is provided with a wear-resistant coating and a limit switch is provided on the guide rail, the limit switch being electrically connected to the control unit.

[0015] As an optimization of a drill pipe inner wall cement solidification blockage cleaning device, the pneumatic impact drill bit has a multi-bladed spiral structure and a hard alloy coating on its surface.

[0016] As an optimization of the drilling pipe inner wall cement solidification blockage cleaning equipment, the control unit is equipped with an overload protection switch, which is used to monitor the feed cylinder.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] (1) High-efficiency automated cleaning: Through the linkage design of adaptive grippers, pneumatic impact drill bit and hydraulic motor, the drill rod is automatically clamped and rotated to impact and break, which significantly improves the cleaning efficiency of cement solidification blockage, and is 3-5 times more efficient than traditional manual operation.

[0019] (2) Precise control and enhanced safety: The cooperation between the guide rail and the slide ensures that the drill bit assembly is accurately fed along the drill rod axis. Combined with the limit switch and overload protection switch, it avoids drill bit deviation or overload damage, reduces the risk of damage to the inner wall of the drill rod, and improves safety by more than 60%.

[0020] (3) Flexible adaptation to different working conditions: The modular design of the extended rod (0.5-1.5m adjustable) supports multi-section combination and can be used for deep dredging of drill rods of different lengths; the arc-shaped claw arm and locking bolt structure of the adaptive gripper can be adapted to drill rods of various outer diameters, making it more versatile.

[0021] (4) Equipment durability optimization: The pneumatic impact drill bit adopts a multi-blade spiral structure and a hard alloy coating, which improves wear resistance by 50% and extends service life; the wear-resistant coating on the guide rail surface reduces wear and lowers maintenance costs.

[0022] (5) Convenient human-computer interaction: The control unit integrates a touch screen and MCU motherboard, supports real-time parameter adjustment and status monitoring, simplifies the operation process and lowers the technical threshold. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of the cleaning device according to an embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the overall structure of the adaptive gripper in an embodiment of this application;

[0026] Figure 3 This is a schematic diagram of the overall structure of the extension rod in an embodiment of this application.

[0027] In the diagram: 1. Fixing mechanism; 11. Fixing rack; 12. Adaptive gripper; 121. Arc-shaped gripper arm; 122. Locking bolt; 2. Drill bit assembly; 21. Pneumatic impact drill bit; 22. Hydraulic motor; 23. Extension rod; 231. External threaded post; 232. Internal threaded hole; 24. Guide rail; 241. Limit switch; 25. Slide table; 3. Feed cylinder; 4. Control unit. Detailed Implementation

[0028] To make the technical solution and advantages of this utility model clearer, the present utility model and its beneficial effects will be described in further detail below with reference to specific embodiments and accompanying drawings. However, the embodiments of this utility model are not limited thereto.

[0029] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0031] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail below.

[0032] This application provides a device for cleaning cement solidification blockage on the inner wall of drill pipes, employing the following technical solution:

[0033] Reference Figure 1 and Figure 2 The cleaning equipment includes a fixing mechanism 1, a drill bit assembly 2, a feed cylinder 3, and a control unit 4. The fixing mechanism 1 includes a fixing rack 11 and adaptive grippers 12. Several adaptive grippers 12 are arranged at intervals along the length of the fixing rack 11. Each adaptive gripper 12 includes two arc-shaped claw arms 121 and a locking bolt 122. The two arc-shaped claw arms 121 are arranged vertically or horizontally opposite each other. The amplitude of a single arc-shaped claw arm 121 matches the outer diameter of the drill rod. The two arc-shaped claw arms 121 enclose to form an arc. The locking bolt 122 applies a uniform clamping force to clamp and fix the drill rod to be cleaned.

[0034] Reference Figure 1 The drill bit assembly 2 is installed on the top surface of the mounting platform on one side of the fixed material rack 11. The drill bit assembly 2 includes a rotatable pneumatic impact drill bit 21 and a hydraulic motor 22 that drives the pneumatic impact drill bit 21 to rotate. When the pneumatic impact drill bit 21 is inserted into the drill rod, the hydraulic motor 22 enables the pneumatic impact drill bit 21 to rotate at a stable speed, reducing the up-and-down jumping of the pneumatic impact drill bit 21. This makes the pneumatic impact drill bit 21 clear blockages more evenly in the drill rod, reducing damage to the inner wall of the drill rod and improving the processing quality of the inner wall of the drill rod.

[0035] Furthermore, referring to Figure 1 The pneumatic impact drill bit 21 has a multi-bladed spiral structure, and its surface is electroplated with a cemented carbide layer, including but not limited to tungsten carbide, titanium carbide, and other materials. The multi-bladed spiral structure increases the cutting force of the pneumatic impact drill bit 21, enhancing its ability to break up blockages. Simultaneously, the cemented carbide layer on its surface increases its wear resistance, extending its service life.

[0036] Reference Figure 1 The feed cylinder 3 is installed inside the mounting platform on one side of the fixed material rack 11. The feed cylinder 3 extends and retracts towards the side closer to the fixed material rack 11, pushing the pneumatic impact drill bit 21 into the drill rod for unblocking. The control unit 4 is fixedly installed on the feed cylinder 3. The control unit 4 includes a main board (MCU) and a touch screen. The main board is connected to the hydraulic motor 22 via a signal line to control the drive of the hydraulic motor 22. The touch screen enables human-machine data interaction and communication, facilitating user control of the equipment.

[0037] Furthermore, referring to Figure 1 The drill bit assembly 2 also includes a guide rail 24 and a slide 25. The guide rail 24 is placed on the top surface of the mounting platform and extends from the feed cylinder 3 to the adaptive gripper 12. The slide 25 is slidably mounted on the guide rail 24. The base of the slide 25 passes through the mounting platform and is hinged to the end of the telescopic rod of the feed cylinder 3. The hydraulic motor 22 is fixedly mounted on the top surface of the slide 25 with screws. Driven by the feed cylinder 3, the slide 25 drives the hydraulic motor 22 to move closer to the adaptive gripper 12, and the pneumatic impact drill bit 21 slides along the guide rail 24, thereby improving the alignment accuracy between the pneumatic impact drill bit 21 and the drill rod axis, reducing damage to the inner wall of the drill rod, and improving safety.

[0038] Furthermore, referring to Figure 1 The guide rail 24 is coated with a wear-resistant coating, which can improve the service life of the guide rail 24; the end of the guide rail 24 is equipped with a limit switch 241, which can cut off the extension and retraction power of the feed cylinder 3 or change the extension and retraction direction of the feed cylinder 3 in time when the slide table 25 slides to the edge of the guide rail 24, so as to prevent the slide table 25 from leaving the guide rail and improve the safety of the equipment.

[0039] In the preferred embodiment of this application, reference is made to Figure 1 and Figure 3 At least one extension rod 23 is detachably connected between the pneumatic impact drill bit 21 and the hydraulic motor 22. One end of the extension rod 23 is integrally formed with an externally threaded post 231, and the other end of the extension rod 23 has an internally threaded hole 232. Furthermore, the length of the extension rod 23 is 0.5-1.5m, and multiple sections can be freely combined according to length requirements. On the one hand, the ends of multiple extension rod sections 23 can be screwed together and connected end to end in sequence. On the other hand, the extension rod 23 can be quickly connected to the pneumatic impact drill bit 21 or the hydraulic motor 22 through threads, thereby adjusting the distance between the pneumatic impact drill bit 21 and the hydraulic motor 22, and enabling deep dredging for drill rods of different lengths.

[0040] In the preferred embodiment of this application, reference is made to Figure 1 The control unit 4 is also equipped with an overload protection switch, which is connected to the circuit of the feed cylinder 3. When the resistance of the feed cylinder 3 is detected to exceed the set threshold (e.g., current ≥ 5A), the overload protection switch feeds back to the control unit 4, immediately cuts off the power supply and alarms. In practical applications, it has been proven that it can avoid more than 90% of drill bit breakage accidents, thereby improving the service life of the drill bit.

[0041] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments described above, and any obvious improvements, substitutions, or modifications made by those skilled in the art based on this utility model are within the protection scope of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A device for cleaning cement-clogged inner walls of drill pipes, characterized in that, It includes a fixing mechanism (1), including a fixing rack (11) and an adaptive gripper (12), the adaptive gripper (12) being used to clamp and fix the drill rod to be cleaned; The drill bit assembly (2) is disposed on one side of the fixed material rack (11). The drill bit assembly (2) includes a rotatable pneumatic impact drill bit (21) and a hydraulic motor (22) for driving the pneumatic impact drill bit (21) to rotate. The feed cylinder (3) is connected to the drill bit assembly (2) and is used to control the feed movement of the drill bit assembly (2) along the drill rod axis; A control unit (4) is disposed on the feed cylinder (3) and is electrically connected to the hydraulic motor (22).

2. A device for cleaning a cement buildup from the interior wall of a drill pipe as set forth in claim 1, wherein, The adaptive gripper (12) includes two arc-shaped gripper arms (121) and a locking bolt (122). The two arc-shaped gripper arms (121) are arranged opposite each other. The curvature of the arc-shaped gripper arms (121) matches the outer diameter of the drill pipe. The locking bolt (122) is used to lock the two arc-shaped gripper arms (121).

3. A device for cleaning a cement buildup from the interior wall of a drill pipe as set forth in claim 1, wherein, The drill bit assembly (2) also includes at least one extension rod (23), which is detachably connected between the pneumatic impact drill bit (21) and the hydraulic motor (22). One end of the extension rod (23) is provided with an external threaded post (231), and the other end of the extension rod (23) is provided with an internal threaded hole (232).

4. A device for cleaning a cement buildup from the interior wall of a drill pipe as set forth in claim 3, wherein, The length of the extension rod (23) is 0.5-1.5m.

5. A device for cleaning a cement buildup from the interior wall of a drill pipe as set forth in claim 1, wherein, The drill bit assembly (2) also includes a guide rail (24) and a slide (25). The guide rail (24) extends toward the adaptive gripper (12). The slide (25) is slidably connected to the guide rail (24). The telescopic rod of the feed cylinder (3) is fixedly connected to the base of the slide (25). The hydraulic motor (22) is fixedly connected to the top surface of the slide (25).

6. A drill pipe internal wall cement solidification plug cleanout apparatus as defined in claim 5, wherein, The guide rail (24) is provided with a wear-resistant coating, and a limit switch (241) is provided on the guide rail (24). The limit switch (241) is electrically connected to the control unit (4).

7. A device for cleaning a cement buildup from the interior wall of a drill pipe as set forth in claim 1, wherein, The pneumatic impact drill bit (21) has a multi-bladed spiral structure and is coated with a hard alloy layer on its surface.

8. The drilling pipe inner wall cement solidification blockage cleaning device according to claim 1, characterized in that, The control unit (4) is equipped with an overload protection switch, which is used to monitor the feed cylinder (3).

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