Special-shaped drill rod loading and unloading clamp

Abstract

This invention discloses a non-standard drill pipe loading and unloading jig. It utilizes a clearance notch to avoid the protruding ribs on the drill pipe section surface. The upper surface of the support plate vertically abuts against the drill pipe section, providing support. Compared to using friction generated by clamping to resist the weight of the drill pipe section, this method avoids damage and is well-suited for loading and unloading large drill pipe sections. The support plate extends radially through a pad to abut against the support surface around the drill pipe. The two components are separate, reducing the weight and volume of individual parts. The pad is designed to consist of multiple arc-shaped pads, and the support plate is designed to consist of multiple arc-shaped support blocks. This not only facilitates installation and use but also further reduces the weight and volume of individual components, improving manufacturing, transportation, and use. This non-standard drill pipe loading and unloading jig is not only simple in structure but also effectively addresses the problem of existing drill pipe jigs being unsuitable for large drill pipes with protruding ribs, thus reducing drilling difficulty.

Description

Technical Field

[0001] This invention belongs to the technical field of rotary drilling device accessories, specifically relating to a non-circular drill pipe loading and unloading clamp. Background Technology

[0002] The drill pipe is one of the key components of a drilling rig. It runs vertically through the power head and is connected to the transmission system. The power head is slidably connected to the column via a slide block and uses a feed mechanism to raise and lower itself and the drill pipe. The lower end of the drill pipe is connected to the drill bit to facilitate drilling. For ease of transportation and manufacturing, spliced ​​drill pipes are generally used. During drilling, when the power head descends close to the ground and the drill pipe length is exhausted, the connection between the drill pipe section at the power head and the section below needs to be disconnected. This allows the power head and the drill pipe section above it to move upwards. Then, an additional drill pipe section is installed between the drill pipe section on the power head and the section below, increasing the drill pipe length to continue drilling. Conversely, after drilling is completed, the drill pipe section also needs to be disassembled.

[0003] During the aforementioned loading and unloading of drill pipe sections, to prevent the lower drill pipe section from falling or shifting, a clamp needs to be placed on the ground to support and stabilize the lower drill pipe section before disconnecting the drill pipe section at the power head from the lower drill pipe section. For example, Chinese Patent CN218657821U discloses a positioning component for disassembling drill pipes. This solution uses a clamp to maintain the stability of the drill pipe section by encircling it and uses the friction generated by the clamping to prevent the drill pipe section from falling. However, its applicability is limited; for irregularly shaped drill pipes with large size and weight, the instruction manual (attached)... Figure 1 When using a clamp-type fixture for a section of the aforementioned irregularly shaped drill pipe, not only is it necessary to increase the frictional force generated by clamping to resist the large weight of the drill pipe section, which can easily damage the surface of the drill pipe section 1, but the surface of the drill pipe section 1 of this type of irregularly shaped drill pipe generally has axially extending ribs 4 between the female connector 2 and the male connector 3 used for splicing, resulting in a small clamping surface and a tendency for unstable clamping. There is also a self-balancing continuous screw-unscrew device for drill pipes, such as the one disclosed in Chinese Patent CN213450290U. Although this solution does not support and stabilize the drill pipe section through friction, its structure is relatively complex and it is only suitable for drill pipes with axially deep grooved wear-resistant joints, as described in Chinese Patent CN214303721U.

[0004] Therefore, given the poor applicability of existing drill pipe clamps to the aforementioned irregular drill pipe shapes, it is necessary to design a clamp suitable for loading and unloading these types of drill pipes to reduce drilling difficulty and improve safety. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of this invention is to provide a non-standard drill pipe loading and unloading fixture, which solves the technical problem that existing drill pipe fixtures are difficult to apply to large drill pipes with protruding ribs on the surface, thereby reducing the difficulty of drilling operations.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A non-circular drill pipe loading and unloading clamp includes an annular pad, which is composed of multiple circumferentially distributed arc-shaped pads. Adjacent arc-shaped pads are detachably connected. An annular support plate is coaxially placed on the pad, which is composed of multiple circumferentially distributed arc-shaped support blocks. The inner diameter of the support plate is smaller than the inner diameter of the pad and is adapted to the outer diameter of the drill pipe section to be clamped. The inner side of the support plate has a clearance notch adapted to the protruding rib on the drill pipe section to be clamped, and the clearance notch is located on the inner side of the pad.

[0007] Furthermore, the pad consists of two circumferentially distributed arc-shaped pads.

[0008] Furthermore, each end of the arc-shaped pad has a connecting lug, and the connecting lugs at opposite ends of adjacent arc-shaped pads overlap vertically and are connected by fasteners.

[0009] Furthermore, in the two vertically overlapping connecting lugs, a stud extending upward is fixed in the connecting hole of the lower connecting lug, the stud passes through the connecting hole of the upper connecting lug and is connected to a nut to fix the two vertically overlapping connecting lugs.

[0010] Furthermore, a guide frustum extends vertically from the upper end of the stud, the diameter of which decreases from bottom to top and the diameter at the lower end corresponds to the diameter of the stud.

[0011] Furthermore, the support plate consists of three circumferentially distributed arc-shaped support blocks.

[0012] Furthermore, a ring-shaped positioning plate is formed on the inner side of the pad. The positioning plate is lower than the upper surface of the pad, and the inner diameter of the positioning plate is the same as the inner diameter of the pad. The support plate is placed on the positioning plate, and the outer diameter of the support plate matches the outer diameter of the positioning plate. The clearance notch is located inside the positioning plate.

[0013] Furthermore, there is a gap between adjacent arc-shaped support blocks.

[0014] Furthermore, a handle is provided on the curved surface of the outer side of the pad on the curved pad block.

[0015] Furthermore, a handle is provided on the upper surface of the arc-shaped support block.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The irregular drill pipe loading and unloading jig of the present invention uses a clearance notch to avoid the protruding ribs on the surface of the drill pipe section, and the upper end face of the support plate abuts against the drill pipe section vertically, thereby providing support for the drill pipe section. Compared with the existing jigs that use the friction generated by clamping to resist the weight of the drill pipe section, it will not damage the drill pipe section and can be better applied to loading and unloading large drill pipe sections.

[0017] 2. The irregular drill pipe loading and unloading fixture of the present invention has a support plate that extends radially through a pad to abut against the support surface around the drill pipe. The two adopt a split structure, which is beneficial to reduce the weight and volume of a single component. The pad is designed to be composed of multiple arc-shaped pads and the support plate is composed of multiple arc-shaped support blocks. On the one hand, it is convenient to install and use, and there is no need to pass through the drill pipe during installation. It can be installed as needed. On the other hand, further disassembling the pad and support plate makes the weight and volume of a single component smaller, which is beneficial to manufacturing, transportation and use. Attached Figure Description

[0018] Figure 1 A perspective view of the large drill pipe described in the background art; Figure 2 This is a perspective view of the irregular-shaped drill pipe loading and unloading fixture described in the embodiment; Figure 3 This is a top view of the irregular drill pipe loading and unloading fixture described in the embodiment; Figure 4 This is a top view of the first pad in the embodiment; Figure 5 This is a top view of the second pad block in the embodiment; Figure 6 This is a perspective view of the arc-shaped support block described in the embodiment; The components include: drill rod section 1, female connector 2, male connector 3, rib 4, connecting part 5, arc-shaped pad 6, arc-shaped support block 7, clearance notch 8, connecting lug 9, stud 10, nut 11, positioning part 12, handle 13, and connecting hole 14. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0020] Example: Please see Figure 2 and Figure 3A non-circular drill pipe loading and unloading clamp includes an annular pad plate composed of multiple circumferentially distributed arc-shaped pad blocks 6, adjacent arc-shaped pad blocks 6 being detachably connected. An annular support plate is coaxially placed on the pad plate, the support plate being composed of multiple circumferentially distributed arc-shaped support blocks 7. The inner diameter of the support plate is smaller than the inner diameter of the pad plate and is adapted to the outer diameter of the drill pipe section to be clamped. The inner side of the support plate has a clearance notch 8 adapted to the protruding rib 4 on the drill pipe section to be clamped, and the clearance notch 8 is located on the inner side of the pad plate.

[0021] The irregular drill pipe loading and unloading fixture of the present invention, when loading and unloading drill pipe section 1, firstly, each arc-shaped pad 6 is placed around the drill pipe section to be clamped on the support surface (provided by the ground or other support components) at the drilling site, then the arc-shaped pads 6 are gathered together to form a pad plate, and then each arc-shaped support block 7 is placed around the drill pipe section to be clamped on the pad plate to form a support plate, and the clearance notch 8 is aligned one-to-one with the protruding rib 4 on the drill pipe section to be clamped, the protruding rib 4 being located in the corresponding clearance notch 8 so that the inner side of the arc-shaped support block 7 is aligned with the female connector 2 on the corresponding drill pipe section 1 and The outer surfaces of the male connectors 3 abut against each other, and finally the power head adjusts the lowering of the drill rod section to be clamped, so that the drill rod section 1 abuts vertically against the upper surface of the support plate (through the stepped surface formed by the female connector 2 or male connector 3 on the corresponding drill rod section 1, or the connecting part 5 located at the end of the rib 4 and whose circumferential dimension is larger than the rib 4 to achieve vertical abutment). At this time, the irregular drill rod loading and unloading jig supports and keeps the position of each drill rod section 1 below stable, and the drill rod section 1 between the power head can be disassembled or disconnected so that the power head can be moved up and additional drill rod sections 1 can be installed.

[0022] The irregular drill pipe loading and unloading jig of the present invention utilizes a clearance notch 8 to avoid the protruding ribs 4 on the surface of the drill pipe section 1. The upper end face of the support plate vertically abuts against the drill pipe section 1, thus providing support for the drill pipe section 1. Compared to resisting the weight of the drill pipe section 1 through the frictional force generated by clamping, this method avoids damage to the drill pipe section 1 and is well-suited for loading and unloading large drill pipe sections 1. The support plate extends radially through a pad to abut against the support surface around the drill pipe. The two components are designed as separate units, which helps reduce the weight and volume of individual parts. The pad is composed of multiple arc-shaped pads 6, and the support plate is composed of multiple arc-shaped support blocks 7. This design facilitates installation and use, eliminating the need to pass through the drill pipe during installation, allowing for immediate installation. Furthermore, further disassembling the pad and support plate reduces the weight and volume of individual parts, which is beneficial for manufacturing, transportation, and use. The irregular drill pipe loading and unloading jig is not only simple in structure but also effectively addresses the problem that existing drill pipe jigs are difficult to apply to large drill pipes with protruding ribs 4 on the surface, thus reducing the difficulty of drilling operations.

[0023] Please see Figure 2 and Figure 3The inner side of the pad has a raised ring forming a positioning plate. Specifically, the positioning plate is composed of positioning parts 12 formed by the raised inner sides of each arc-shaped pad 6 connected circumferentially. The positioning plate is lower than the upper end face of the pad, and the inner diameter of the positioning plate is the same as the inner diameter of the pad. The support plate is placed on the positioning plate, and the outer diameter of the support plate matches the outer diameter of the positioning plate. The clearance notch 8 is located inside the positioning plate. In this way, when in use, the positioning plate has a stepped hole formed on the inner side of the pad to perform the installation and positioning function. The arc-shaped support block 7 is placed on the positioning plate. The support plate is restricted radially by the stepped hole wall between the positioning plate and the pad and the outer side of the drill rod section 1. This not only ensures that the inner side of the support plate abuts against the outer side of the drill rod section 1, but also prevents the arc-shaped support block 7 from accidentally moving outward and causing support failure. This is beneficial to improving the reliability of the irregular drill rod loading and unloading fixture.

[0024] Please see Figure 2 and Figure 3 The pad consists of two circumferentially distributed arc-shaped pads 6, each with a connecting lug 9 at both ends. When in use, they are closed together, and adjacent connecting lugs 9 are connected using fasteners. In this embodiment, the two arc-shaped pads 6 are respectively as follows: Figure 4 The first pad shown and as Figure 5 The second pad shown has an upper end face of the connecting lug 9 on the first pad that is flush with the upper end face of the positioning part 12, and an upwardly extending stud 10 is fixed in the connecting hole 14 of the connecting lug 9. The lower end face of the connecting lug 9 on the second pad is flush with the upper end face of the positioning part 12, so that the connecting lugs 9 at opposite ends of the first pad and the second pad can overlap vertically. The stud 10 passes through the connecting hole 14 of the upper connecting lug 9 and is connected to the nut 11, thereby connecting the first pad and the second pad together.

[0025] Please see Figure 2 The upper end of the stud 10 is tapered and forms a guide frustum. The diameter of the guide frustum decreases from bottom to top and the diameter of the lower end corresponds to the diameter of the stud 10. In this way, when the stud 10 on the lower connecting lug 9 passes through the connecting hole 14 of the upper connecting lug 9, the guide frustum plays a positioning and guiding role, which can reduce the difficulty of overlapping and connecting the two connecting lugs and improve the practicality of the irregular drill rod clamp.

[0026] Please see Figure 3 and Figure 6 The number of arc-shaped support blocks 7 is the same as the number of protruding ribs 4 on the outside of the drill rod section 1 to be clamped. Each arc-shaped support block 7 has a clearance notch 8 on its inner side. In this embodiment, the support plate is composed of three circumferentially distributed arc-shaped support blocks 7. In this way, the arc-shaped support blocks 7 and the clearance notches 8 correspond one-to-one, so that each arc-shaped support block 7 corresponds to a protruding rib 4 on the outside of the drill rod section 1 to be clamped, which helps to reduce the installation difficulty of the arc-shaped support blocks 7.

[0027] Please see Figure 2 and Figure 3 There is a gap between adjacent arc-shaped support blocks 7. In this way, when installing the arc-shaped support blocks 7, there is a margin for installation at both ends of each arc-shaped support block 7, which helps to reduce the installation difficulty of the arc-shaped support blocks 7.

[0028] Please see Figure 4 , Figure 5 and Figure 6 A handle 13 is provided on the arc surface of the arc-shaped pad 6 forming the outer side of the pad plate, and a handle 13 is provided on the upper end surface of the arc-shaped support block 7, so as to facilitate the movement of the arc-shaped pad 6 and the arc-shaped support block 7 by construction personnel, which helps to reduce the difficulty of use.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of the present invention without departing from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A jig for loading and unloading irregularly shaped drill pipes, characterized in that: It includes an annular pad, which is composed of multiple circumferentially distributed arc-shaped pads. Adjacent arc-shaped pads are detachably connected. An annular support plate is placed coaxially on the pad. The support plate is composed of multiple circumferentially distributed arc-shaped support blocks. The inner diameter of the support plate is smaller than the inner diameter of the pad and is adapted to the outer diameter of the drill pipe section to be clamped. The inner side of the support plate has a clearance notch adapted to the protruding rib on the drill pipe section to be clamped, and the clearance notch is located on the inner side of the pad.

2. The irregular-shaped drill pipe loading and unloading fixture according to claim 1, characterized in that: The pad consists of two circumferentially distributed arc-shaped pads.

3. The irregular-shaped drill pipe loading and unloading fixture according to claim 1, characterized in that: The two ends of the arc-shaped pad have connecting lugs, and the connecting lugs at opposite ends of adjacent arc-shaped pads overlap vertically and are connected by fasteners.

4. The irregular-shaped drill pipe loading and unloading fixture according to claim 3, characterized in that: In the two vertically overlapping connecting lugs, a stud extending upward is fixed in the connecting hole of the lower connecting lug. The stud passes through the connecting hole of the upper connecting lug and is connected to a nut to fix the two vertically overlapping connecting lugs.

5. The irregular-shaped drill pipe loading and unloading fixture according to claim 4, characterized in that: The upper end of the stud extends vertically to form a guide frustum, the diameter of which decreases from bottom to top and the diameter at the lower end corresponds to the diameter of the stud.

6. The irregular-shaped drill pipe loading and unloading fixture according to claim 1, characterized in that: The support plate consists of three circumferentially distributed arc-shaped support blocks.

7. The irregular-shaped drill pipe loading and unloading fixture according to claim 1, characterized in that: The inner side of the pad has a raised ring forming a positioning plate. The positioning plate is lower than the upper end of the pad, and the inner diameter of the positioning plate is the same as the inner diameter of the pad. The support plate is placed on the positioning plate, and the outer diameter of the support plate matches the outer diameter of the positioning plate. The clearance notch is located inside the positioning plate.

8. The irregular-shaped drill pipe loading and unloading fixture according to claim 1, characterized in that: There is a gap between adjacent arc-shaped support blocks.

9. The irregular-shaped drill pipe loading and unloading fixture according to claim 1, characterized in that: A handle is provided on the curved surface of the outer side of the pad on the curved pad block.

10. The irregular-shaped drill pipe loading and unloading fixture according to claim 1, characterized in that: A handle is provided on the upper surface of the arc-shaped support block.

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