A petroleum drilling apparatus cutting tool

Abstract

The utility model discloses a kind of petroleum drilling equipment cutting tools. Petroleum drilling equipment cutting tool, comprising: tool and the bracket for installing tool;The tool includes cutting tool for cutting centralizer rubber wing, cutting tool is equipped with tool rest on;The bracket includes mounting bracket, driving element is connected on the mounting bracket, fixed mounting screw rod on driving element, the screw rod is threadedly connected with the force holder fixedly installed in the lower end of tool rest, pull rod is also provided on the mounting bracket, the lower end of pull rod has hook;Screw rod drives tool rest and cutting tool moves along the direction of centralizer rubber wing, while pull rod and the hook on pull rod limit the force movement of centralizer. The petroleum drilling equipment cutting tool provided by the utility model realizes the cutting effect of cutting tool to rubber wing by screw rod and other related components, compared with the existing driving mode using eccentric wheel, the cutting stroke of tool is larger, whether long or short rubber wing can be cut completely, improve work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of oil drilling equipment technology, and in particular to a cutting tool for oil drilling equipment. Background Technology

[0002] Drilling stabilizers (also known as centralizers) are crucial tools in oil, gas, and geological exploration drilling projects, used to control wellbore trajectory and prevent well deviation. Installed in the drill string assembly, they straighten the drill string and stabilize the drilling direction. Their structure typically consists of a large-diameter joint with helical grooves or straight ribs, and the outer surface is often inlaid with hard alloy or diamond to enhance wear resistance. Based on installation location, they can be classified as bottom-hole type and drill string type; based on structure, they can be classified as integral type and detachable type. Stabilizers reduce eccentric contact between the drill string and the wellbore, mitigating vibration and wear, and improving drill bit stability. They also have the function of enlarging and trimming the wellbore in curved sections, contributing to improved wellbore quality. In complex well types such as directional and horizontal wells, the proper use of stabilizers can effectively control wellbore curvature, avoid the "dogleg" phenomenon, and reduce drilling risks and costs. Furthermore, modern stabilizers have evolved into replaceable sleeve type and drillable type, improving adaptability and service life, and are an important guarantee for achieving efficient and safe drilling.

[0003] The prior art discloses a centralizer rubber-blade cutting tool for a wireless drilling instrument in oil drilling, belonging to the field of drilling engineering technology. It includes a cutting tool, which is a ring-shaped cutting tool. The cutting tool also includes a base, a guide shaft located above the base, and a tool holder for fixing the cutting tool. The tool holder has a guide hole at its center, through which it is fitted onto the guide shaft. A fixing frame parallel to the guide shaft is provided on the outer side of the tool holder. A rotating shaft perpendicular to the fixing frame is provided at the upper end of the fixing frame. A wrench is fitted onto the rotating shaft, one end of which has an eccentric structure. The distance from the distal end of the eccentric structure to the center line of the rotating shaft is greater than the height of the rubber-blade to be cut.

[0004] The deflection range of the eccentric structure is limited, while the specifications of the stabilizer and the rubber wings are diverse. For rubber wings with a long length, it is difficult to perform an effective and complete cutting operation using the limited driving range of the eccentric structure.

[0005] Therefore, it is necessary to provide cutting tools for oil drilling equipment to solve the above-mentioned technical problems. Utility Model Content

[0006] In view of the above situation and to overcome the defects of the existing technology, this utility model provides a cutting tool for oil drilling equipment that can cut rubber wings with a large length.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: Cutting tools for oil drilling equipment, including: cutting tools and supports for mounting the cutting tools; The cutting tool includes a cutting tool for cutting the rubber flaps on the stabilizer, and a tool holder is mounted on the cutting tool; The bracket includes a mounting frame, a driving component is connected to the mounting frame, a lead screw is fixedly mounted on the driving component, the lead screw is threadedly connected to a force-bearing frame fixedly mounted at the lower end of the tool holder, and a pull rod is also provided on the mounting frame, with a hook at the lower end of the pull rod; The lead screw drives the tool holder and cutting tool to move along the direction of the stabilizer's rubber wings, while the pull rod and the hook on the pull rod restrict the force-driven movement of the stabilizer.

[0008] Preferably, the driving component is a handwheel, the lower end of the handwheel is rotatably connected to the mounting bracket, and the handwheel is fixedly connected to the lead screw.

[0009] Preferably, the cutting tool is detachably connected to the tool holder.

[0010] Preferably, the tool holder is mounted on the upper end of the cutting tool, and the cutting tool is threadedly connected to the tool holder.

[0011] Preferably, the tool holder is mounted on the upper end of the cutting tool, and the cutting tool is connected to the tool holder in a socket-type manner.

[0012] Preferably, one end of the tie rod is hinged to the mounting frame, and the other end is a free end; the tie rod is made of steel bars.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) This utility model achieves the cutting effect of the cutting tool on the rubber wings through the lead screw and other related components. Compared with the existing drive method using eccentric wheels, the cutting stroke of the tool is larger, and the rubber wings of both length and length can be completely cut, thus improving work efficiency. (2) The quick disassembly connection between the tool holder and the cutting tool of this utility model makes it easy to replace the cutting tool of different specifications. When it is necessary to cut out different specifications of rubber wings, the corresponding cutting tool head can be replaced. Therefore, the applicability of the device is more extensive. (3) The upper end of the pull rod of this utility model is hinged to the mounting bracket and can rotate flexibly during this process. Compared with the fixed connection method, there is no bending at the connection between the pull rod and the mounting bracket, and the damage to the pull rod is less. Attached Figure Description

[0014] Figure 1 A schematic diagram illustrating the use of the cutting tool for oil drilling equipment provided by this utility model; Figure 2 A schematic diagram of the structure of the cutting tool for oil drilling equipment provided by this utility model; Figure 3A cross-sectional view of the cutting tool for oil drilling equipment provided by this utility model.

[0015] The corresponding names of the reference numerals in the attached drawings are as follows: 10, cutting tool; 11, cutting blade; 12, tool holder; 13, force support; 20, bracket; 21, mounting bracket; 22, handwheel; 23, lead screw; 24, pull rod; 241, hook. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0017] Drilling stabilizer rubber wings are elastic blade structures applied to drill string stabilizers. They are typically made of high-strength rubber or polyurethane and installed in slots within the stabilizer body to provide flexible centralizing force during drilling. Under drilling fluid pressure downhole, the rubber wings deform moderately, adhering tightly to the wellbore, effectively enhancing drill string centering, reducing vibration and wear, and preventing rigid damage to the wellbore. This is particularly suitable for soft formations or easily collapsible sections. Their elastic properties give the stabilizer good maneuverability, adapting to minor changes in wellbore size and reducing the risk of stuck pipe. The rubber wing design also facilitates drilling fluid flow, helps carry cuttings and cool the drill bit, improving drilling efficiency. Compared to metal stabilizer blades, rubber wings are easier to replace after wear, cause less damage to the drill string body, and extend the overall service life of the stabilizer. To adapt to different wellbore diameters and working conditions, the shape, thickness, and hardness of the rubber flap can be optimized, exhibiting good adjustability and economy. It is an important technical means to achieve flexible centralization and wellbore stability in modern drilling. Due to different operating scenarios and borehole sizes, the rubber flap often needs to be cut to the required specifications before use. The inventors discovered that existing cutting methods either involve manual cutting using general-purpose cutting tools based on intuition or cutting with eccentric cutting tools. However, the deflection range of eccentric structures is limited, and the specifications of centralizers and rubber flaps are diverse. For rubber flaps with larger lengths, it is difficult to perform effective and complete cutting operations using the limited driving range of eccentric structures.

[0018] First embodiment: like Figure 1 As shown, the cutting tool for oil drilling equipment provided by this utility model includes: a cutting tool 10 and a bracket 20 for mounting the cutting tool 10. The cutting tool 10 is used to cut the rubber wings on the stabilizer, and the bracket 20 is the mounting structure for the cutting tool 10. Specifically, such as Figure 1 , Figure 2As shown, the cutting tool 10 includes a cutting blade 11 for cutting the rubber wings on the stabilizer. The cutting blade 11 is cylindrical with eight grooved notches at its lower end. The notches are the cutting edges, which are aligned with the rubber wings to cut them. A tool holder 12 is fixedly mounted on the cutting blade 11. The tool holder 12 is used to connect the cutting blade 11 and the force support frame 13. The structures of the tool holder 12 and the force support frame 13 are as follows: Figure 2 As shown, both are cylindrical with a hollow interior, and the upper end of the force-bearing frame 13 is a plug, as shown. Figure 3 The plug has a through hole for the pull rod 24 to pass through and a threaded hole for threaded connection of the lead screw 23; like Figure 3 As shown, the bracket 20 includes a mounting frame 21, which is cylindrical with a hollow interior. The lower shaft of the handwheel 22 is rotatably mounted in the hollow interior of the mounting frame 21. Simultaneously, a lead screw 23 is vertically welded to the lower shaft of the handwheel 22. The lead screw 23 extends downwards through a threaded hole on the support frame 13. Furthermore, four pull rods 24 are welded to the lower end of the mounting frame 21. The pull rods 24 are made of bent steel bars, extending downwards and passing through through holes on the support frame 13, continuing downwards through the opening at the lower end of the cutting blade 11. The lowest point of the pull rod 24 is a hook 241. Figure 1 As shown, hook 241 is used to hook onto the lowest opening of the stabilizer.

[0019] like Figure 3 As shown, in use, first pass the stabilizer through the bottom of the hook 241 from bottom to top, then hang the hook 241 on the lower opening of the stabilizer. The upper end of the stabilizer is located in the cavity formed by the cutting blade 11 and the tool holder 12. Then, hold the mounting bracket 21 and the force-holding frame 13 by hand and turn the handwheel 22. The rotation of the handwheel 22 drives the rotation of the lead screw 23. The lead screw 23 drives the force-holding frame 13 to move downward. Since the cutting blade 11 and the tool holder 12 are fixedly installed on the force-holding frame 13, the cutting blade 11 and the tool holder 12 move downward together with the force-holding frame 13. Align the notch on the cutting blade 11 with the rubber wings on the stabilizer and further rotate the handwheel 22. During this process, the cutting blade 11 pushes the rubber wings of the stabilizer downward and cuts them. The hook 241 generates an upward pushing force on the stabilizer, constraining its downward movement. Thus, as the handwheel 22 drives the lead screw 23 to rotate, the cutting blade 11 gradually moves downward until the excess part of the rubber wings is cut off.

[0020] The cutting tool 11 achieves the cutting effect on the rubber wings through the lead screw 23 and other related components. Compared with the existing drive method using an eccentric wheel, the cutting stroke of the tool 10 is larger, and the rubber wings of both long and short lengths can be completely cut, thus improving work efficiency.

[0021] Second embodiment: like Figure 3As shown, the tool holder 12 is mounted on the upper end of the cutting tool 11. The outer diameter of the upper end of the cutting tool 11 is slightly smaller than the inner wall of the lower end of the tool holder 12. The two are connected with a clearance fit. Alternatively, the cutting tool 11 with threads on the outer wall and the tool holder 12 with threads on the inner wall can be installed by threaded connection.

[0022] The quick-release connection between the tool holder 12 and the cutting blade 11 facilitates the replacement of cutting blades 11 of different specifications. When it is necessary to cut out rubber wings of different specifications, the corresponding cutting blade 11 head can be replaced. Therefore, the device has a wider range of applications.

[0023] Third embodiment: One end of the pull rod 24 is hinged to the mounting bracket 21, and the other end is free. During the cutting of the rubber wings, the upper end of the pull rod 24 pulls the mounting bracket 21 downward, and the lower end of the pull rod 24 pulls the lower opening of the stabilizer upward. Therefore, the pull rod 24 is in a taut state throughout the process. The upper end of the pull rod 24 is hinged to the mounting bracket 21 and can rotate flexibly during this process. Compared with the fixed connection, there is no bending at the connection between the pull rod 24 and the mounting bracket 21, which reduces the damage to the pull rod 24.

[0024] Working principle: Pass the stabilizer through the bottom of the hook 241 from bottom to top, and then hang the hook 241 on the lower opening of the stabilizer. The upper end of the stabilizer is located in the cavity formed by the cutting blade 11 and the tool holder 12. Then, hold the mounting bracket 21 and the force-holding frame 13 by hand and turn the handwheel 22. The rotation of the handwheel 22 drives the rotation of the lead screw 23. The lead screw 23 drives the force-holding frame 13 to move downward. Since the cutting blade 11 and the tool holder 12 are fixedly installed on the force-holding frame 13, the cutting blade 11 and the tool holder 12 move downward together with the force-holding frame 13. Align the notch on the cutting blade 11 with the rubber wings on the stabilizer and further turn the handwheel 22. During this process, the cutting blade 11 pushes the rubber wings of the stabilizer downward and cuts them. The hook 241 generates an upward pushing force on the stabilizer, constraining its downward movement. Thus, as the handwheel 22 drives the lead screw 23 to rotate, the cutting blade 11 gradually moves downward until the excess part of the rubber wings is cut off.

[0025] The above embodiments are merely one of the preferred embodiments of this utility model and should not be used to limit the scope of protection of this utility model. Any modifications or refinements made to the main design concept and spirit of this utility model that are not of substantial significance, but solve the same technical problem as this utility model, should be included within the scope of protection of this utility model.

Claims

1. A cutting tool for oil drilling equipment, characterized in that, include: The cutting tool (10) and the bracket (20) for mounting the cutting tool (10); The cutting tool (10) includes a cutting tool (11) for cutting the rubber wings on the stabilizer, and a tool holder (12) is mounted on the cutting tool (11). The bracket (20) includes a mounting frame (21), a driving component is connected to the mounting frame (21), a lead screw (23) is fixedly mounted on the driving component, the lead screw (23) is threadedly connected to a force-bearing frame (13) fixedly mounted at the lower end of the tool holder (12), and a pull rod (24) is also provided on the mounting frame (21), the lower end of the pull rod (24) has a hook (241). The lead screw (23) drives the tool holder (12) and the cutting tool (11) to move along the direction of the stabilizer's rubber wings, while the pull rod (24) and the hook (241) on the pull rod (24) restrict the force movement of the stabilizer.

2. The cutting tool for oil drilling equipment according to claim 1, characterized in that, The driving component is a handwheel (22), the lower end of the handwheel (22) is rotatably connected to the mounting bracket (21), and the handwheel (22) is fixedly connected to the lead screw (23).

3. The cutting tool for oil drilling equipment according to claim 1, characterized in that, The cutting tool (11) is detachably connected to the tool holder (12).

4. The cutting tool for oil drilling equipment according to claim 3, characterized in that, The tool holder (12) is mounted on the upper end of the cutting tool (11), and the cutting tool (11) is threadedly connected to the tool holder (12).

5. The cutting tool for oil drilling equipment according to claim 3, characterized in that, The tool holder (12) is mounted on the upper end of the cutting tool (11), and the cutting tool (11) is connected to the tool holder (12) in a socket-type manner.

6. The cutting tool for oil drilling equipment according to claim 1 or 3, characterized in that, One end of the tie rod (24) is hinged to the mounting frame (21), and the other end is a free end. The tie rod (24) is made of steel bars.

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