Top drive drilling device and drill pipe

Abstract

The present invention discloses a top-drive drilling device and a drill pipe thereof, wherein the drill pipe comprises a plurality of drill pipe docking units (10), wherein the drill pipe docking unit (10) comprises a rigid barrel body (11) and an elastic sleeve assembly (12) sleeved outside the rigid barrel body (11) and fixed to the rigid barrel body (11), wherein a portion of the elastic sleeve assembly (12) protrudes from the outer wall of the rigid barrel body (11) and is used to rub against the inner wall of the gas layer casing (30) of the top-drive drilling device, and the rigid barrel bodies (11) of two adjacent drill pipe docking units (10) are detachably connected. The above scheme can solve the problem that the drill pipe involved in the related art will cause relatively serious wear to the gas layer casing of the top-drive drilling device.

Description

Technical Field

[0001] The invention relates to the technical field of drilling tools, and in particular to a top drive drilling device and a drill rod thereof. Background Art

[0002] For many years, oil drilling has been relying on the turntable of the drilling rig to drive the drill pipe and drill bit to rotate and realize drilling operations. In recent years, with the continuous development of drilling equipment technology, in order to better meet the special process requirements of some drilling, a drilling device that combines a faucet with a motor, can drive the drill bit to rotate in the upper part of the derrick space, and can be sent down along the guide rail placed in the derrick has been widely used. This drilling device can complete the operations of rotating the drill string downhole, circulating drilling fluid, unloading the drill pipe, tripping, and rotating while tripping. Since this drilling device is located under the traveling pulley of the drilling rig and the driving position is higher than the turntable of the original drilling rig, it is called a top drive drilling device. This drilling device can reduce one-third of the make-up and breakout operations during drilling, can provide greater rotational power than the turntable without affecting the existing equipment, can realize continuous tripping, circulation, rotation and casing operations, and can also make the stuck drill pipe back-marking, reducing the labor intensity of the operator and the probability of personal accidents of the operator.

[0003] With the increasing number of low-yield and low-efficiency oil wells, in order to achieve the goal of reducing costs and increasing efficiency, fully tap the remaining oil and gas resources of oil wells, and improve the overall recovery rate, the demand for side-drilling wells and side-drilling horizontal wells has increased year by year. After the gas layer casing window is opened, the long drilling time and the wellhead are not centered, which causes the top drive column of the drilling device to increase the lateral force on the bottom flange of the gas layer casing, which is more likely to cause the friction and wear between the bottom flange and the top drive column to become more and more prominent. Since the bottom flange is a key component of the well control and blowout prevention equipment connecting the gas layer casing and the wellhead, once the bottom flange is worn, the wall thickness of the gas layer casing is greatly reduced, which leads to a significant reduction in the bearing capacity, anti-squeezing ability and anti-corrosion ability of the gas layer casing. This will cause the drilling equipment to have greater risks during the drilling process and the later mining process. In severe cases, it will lead to the scrapping of oil and gas wells and cause greater economic losses. Summary of the invention

[0004] The embodiment of the present invention discloses a top drive drilling device and a drill pipe thereof, so as to solve the problem that the drill pipe involved in the related art may cause serious wear to the gas layer casing of the top drive drilling device.

[0005] In order to solve the above technical problems, the embodiments of the present invention disclose the following technical solutions:

[0006] A drill pipe of a top-drive drilling device includes a plurality of drill pipe docking units, wherein the drill pipe docking units include a rigid barrel body and an elastic sleeve assembly which is sleeved outside the rigid barrel body and fixed to the rigid barrel body. Part of the elastic sleeve assembly protrudes from the outer wall of the rigid barrel body and is used for friction with the inner wall of the gas layer casing of the top-drive drilling device. The rigid barrel bodies of two adjacent drill pipe docking units are detachably connected.

[0007] Optionally, the elastic sleeve assembly includes an elastic skeleton and a detachable sleeve, both of which are cylindrical structures. The elastic skeleton is fixed to the outer wall of the rigid cylinder body, and the detachable sleeve is detachably mounted on the elastic skeleton.

[0008] Optionally, the elastic frame is provided with a hanging hole, and the detachable kit has a hanging protrusion, and the hanging protrusion is positioned in the corresponding hanging hole to detachably connect the detachable kit and the elastic frame.

[0009] Optionally, the detachable kit includes a kit body and a plurality of ridges, wherein the plurality of ridges are fixed to the outer wall of the kit body along the circumferential direction of the kit body, the plurality of ridges protrude from the outer wall of the rigid tube body, and extend along the central axis direction of the kit body, and the central axis direction of the kit body is consistent with the central axis direction of the rigid tube body.

[0010] Optionally, the material of the detachable kit is thermoplastic polyurethane.

[0011] Optionally, the rigid cylinder body is a stepped structure, and the rigid cylinder body includes a first cylinder section and a second cylinder section which are interconnected and coaxial, the diameter of the first cylinder section is larger than the diameter of the second cylinder section, and an annular limiting surface is formed at the connection between the two, the elastic sleeve assembly is sleeved on the second cylinder section, and the first end of the elastic sleeve assembly is in axial limiting contact with the annular limiting surface of the drill rod.

[0012] Optionally, the drill rod further comprises a plurality of connection kits, the rigid barrel bodies of two adjacent drill rod docking units are respectively fixed to opposite ends of the connection kits by threaded engagement, and the second barrel section is threadedly engaged with the end of the connection kit.

[0013] Optionally, the connecting kit is sleeved outside the second barrel section, and the end face of the connecting kit opposite to the annular limiting surface is in axial limiting contact with the second end of the elastic sleeve assembly of the drill pipe, and the connecting kit, the annular limiting surface and the outer wall of the second barrel section form an annular positioning groove, and the elastic sleeve assembly is positioned in the annular positioning groove.

[0014] Optionally, an annular isolation protrusion is fixed in each of the connecting kits, and the central axis of the annular isolation protrusion is colinear with the central axis of the connecting kit. In the two rigid cylinder bodies connected to the connecting kit, the second cylinder section of the upper rigid cylinder body abuts against one side of the annular isolation protrusion, and the first cylinder section of the lower rigid cylinder body abuts against the other side of the annular isolation protrusion.

[0015] A top drive drilling device comprises the drill pipe as described in any one of the above items.

[0016] The damper disclosed in the embodiment of the present invention has the following technical effects:

[0017] The drill pipe of the top-driven drilling device disclosed in the embodiment of the present invention has multiple drill pipe docking units including an elastic sleeve assembly that can protrude from the rigid tube body. The elastic sleeve assembly has a weaker rigidity than the rigid tube body and also protrudes from the outer wall of the rigid tube body. Therefore, after the drill pipe is installed in the gas layer casing of the top-driven drilling device, even if the drill pipe and the inner wall of the gas layer casing come into contact and friction, the elastic sleeve assembly has a weaker rigidity and can therefore produce soft friction with the gas layer casing, thereby alleviating the wear of the drill pipe on the gas layer casing. Of course, it can also alleviate the wear on the bottom flange of the gas layer casing, thereby alleviating the more serious wear between the drill pipe and the inner wall of the gas layer casing in the related art, which leads to the problem of thinning of the wall thickness of the gas layer casing, and ultimately the bearing capacity, anti-collapse ability and anti-corrosion ability of the gas layer casing will not be greatly adversely affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a drill pipe docking unit and a connection kit connected to each other according to an embodiment of the present invention;

[0019] Figure 2 yes Figure 1 AA section view;

[0020] Figure 3 is a schematic diagram of the elastic skeleton disclosed in an embodiment of the present invention after being unfolded;

[0021] Figure 4 It is a schematic diagram of a single module of a drill pipe disclosed in an embodiment of the present invention.

[0022] 10-drill pipe docking unit, 11-rigid barrel body, 111-annular positioning groove, 112-first barrel section, 113-second barrel section, 12-elastic sleeve assembly, 121-elastic skeleton, 122-detachable kit, 101-hanging hole, 102-kit body, 103-convex ridge,

[0023] 20-Connection Kit,

[0024] 40-Annular isolation protrusion. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] The technical solutions disclosed in various embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0027] Please refer to Figures 1 to 4 The embodiment of the present invention discloses a drill pipe of a top drive drilling device. The drill pipe includes a plurality of drill pipe docking units 10. Specifically, the drill pipe disclosed in the embodiment of the present invention can be formed by docking a plurality of drill pipe docking units 10. Each drill pipe docking unit 10 includes a rigid barrel body 11 and an elastic sleeve assembly 12.

[0028] The rigid barrel body 11 is a cylindrical structure with strong rigidity, and is the base of the drill pipe docking unit 10. The elastic sleeve assembly 12 is also a cylindrical structure, and its rigidity is weaker than that of the rigid barrel body 11, so as to alleviate the wear of the parts (such as gas layer casing) that rub against it. In the embodiment of the present invention, the elastic sleeve assembly 12 is sleeved outside the rigid barrel body 11 and fixed on the rigid barrel body 11.

[0029] Part of the elastic sleeve assembly 12 protrudes from the outer wall of the rigid barrel body 11, and is used to rub against the inner wall of the gas layer casing of the top drive drilling device. Since the rigidity of the elastic sleeve assembly 12 is relatively weak, the friction between the elastic sleeve assembly 12 and the inner wall of the gas layer casing can be considered as soft friction. In other words, part of the elastic sleeve assembly 12 protrudes from the outer wall of the rigid barrel body 11, so that when the drill pipe is installed in the gas layer casing, the part of the elastic sleeve assembly 12 protruding from the outer wall of the rigid barrel body 11 can first contact the inner wall of the gas layer casing, and can also avoid the outer wall of the rigid barrel body 11 from contacting the inner wall of the gas layer casing as much as possible, thereby avoiding excessive wear on the gas layer casing.

[0030] In the embodiment of the present invention, the rigid barrel bodies 11 of two adjacent drill rod docking units 10 are detachably connected, thereby realizing detachable docking of two adjacent drill rod docking units 10. Similarly, the multiple drill rod docking units 10 included in the drill rod are connected one by one, thereby realizing assembly of the drill rod.

[0031] The drill pipe of the top-driven drilling device disclosed in the embodiment of the present invention has multiple drill pipe docking units 10 each including an elastic sleeve assembly 12 that can protrude from the rigid tube body 11. The elastic sleeve assembly 12 has a lower rigidity than the rigid tube body 11 and also protrudes from the outer wall of the rigid tube body 11. Therefore, after the drill pipe is installed in the gas layer casing of the top-driven drilling device, even if the drill pipe and the inner wall of the gas layer casing come into contact and friction, the elastic sleeve assembly 12 has a lower rigidity and can therefore produce soft friction with the gas layer casing, thereby alleviating the wear of the drill pipe on the gas layer casing. Of course, it can also alleviate the wear on the bottom flange of the gas layer casing, thereby alleviating the more serious wear between the drill pipe and the inner wall of the gas layer casing in the related art, which leads to the problem of thinning of the wall thickness of the gas layer casing, and ultimately the bearing capacity, anti-collapse ability and anti-corrosion ability of the gas layer casing will not be greatly adversely affected.

[0032] As described above, the elastic sleeve assembly 12 can be made of a material with a relatively low hardness, as long as it can ensure that the wear of the inner wall of the gas layer casing can be alleviated when it rubs against the inner wall of the gas layer casing. The embodiment of the present invention does not limit the material of the elastic sleeve assembly 12. The elastic sleeve assembly 12 can be deformed and tensionedly sleeved outside the rigid tube body 11, or it can be installed on the rigid tube body 11 by hugging the rigid tube body 11. The embodiment of the present invention does not limit this.

[0033] In one embodiment, the elastic sleeve assembly 12 may include an elastic skeleton 121 and a detachable sleeve 122, both of which are cylindrical structures, and the elastic skeleton 121 is fixed to the outer wall of the rigid cylinder body 11. Specifically, the elastic skeleton 121 can be sleeved on the outer wall of the rigid cylinder body 11 through elastic deformation, or it can be fixed to the outer wall of the rigid cylinder body 11 by curling a piece of elastic raw material into a cylindrical structure and then welding the two ends of the raw material, which is not limited in the embodiment of the present invention.

[0034] The detachable kit 122 is detachably mounted on the elastic skeleton 121. As the outermost layer of the elastic sleeve assembly 12, it can contact the inner wall of the gas layer casing when the drill pipe and the inner wall of the gas layer casing rub against each other. The detachable kit 122 is the part where the drill pipe contacts the inner wall of the gas layer casing. In specific work, the detachable kit 122 is severely worn. In this embodiment, the detachable kit 122 is detachably mounted on the elastic skeleton 121, so that it is convenient to replace the detachable kit 122 after it is severely worn, thereby ensuring that the elastic sleeve assembly 12 of the drill pipe plays a pioneering role and rubs against the inner wall of the gas layer casing. At the same time, in this structure, the elastic skeleton 121 serves as the installation basis of the detachable kit 122, and does not actually participate in the friction after contacting the inner wall of the gas layer casing. Therefore, compared with the detachable kit 122, it is not a wearing part and does not need to be replaced. After the elastic sleeve assembly 12 is worn to a certain extent, the equipment maintenance personnel only need to replace the detachable kit 122, and there is no need to replace the entire elastic sleeve assembly 12, which can reduce costs.

[0035] Of course, in other supporting examples, the elastic sleeve assembly 12 can be an integrated structure and can be replaced by overall disassembly and assembly, but in this case the cost is relatively high.

[0036] In an embodiment of the present invention, the detachable kit 122 can be detachably mounted on the elastic skeleton 121 by tensioning. Of course, in a specific embodiment, the elastic skeleton 121 can be provided with a hanging hole 101, and the detachable kit 122 has a hanging protrusion, which is positioned in the corresponding hanging hole 101 to detachably connect the detachable kit 122 and the elastic skeleton 121. At this time, the positioning and hanging of the hanging protrusion and the hanging hole 101 realizes the detachable connection between the detachable kit 122 and the elastic skeleton 121, which has the advantages of convenient operation and simple structure. Of course, in the process of disassembly, it is only necessary to grab the detachable kit 122 so that the hanging protrusion is separated from the hanging hole 101 to release the positioning, thereby realizing the separation of the detachable kit 122 and the elastic skeleton 121. Of course, in the process of installation, the detachable kit 122 is sleeved on the elastic skeleton 121, and the hanging protrusion is positioned in the hanging hole 101.

[0037] Of course, in other embodiments, the detachable kit 122 can be formed by high-temperature casting and vulcanization of a mold. At this time, in order to improve the connection effect, the hanging hole 101 provided in the elastic skeleton 121 can be used as a glue hanging hole. Specifically, the material of the detachable kit 122 is thermoplastic polyurethane. In this case, the detachable kit 122 can be formed by high-temperature casting and vulcanization of thermoplastic polyurethane through a corresponding mold. Thermoplastic polyurethane has the advantages of durability, relatively stable chemical composition, light weight, and self-lubricating properties.

[0038] The structure of the detachable kit 122 can be various, for example, the inner wall surface and the outer wall surface of the detachable kit 122 can both be cylindrical surfaces, in which case the outer wall surface of the detachable kit 122 is relatively smooth. In other embodiments, the detachable kit 122 can include a kit body 102 and a plurality of ridges 103. The kit body 102 is a cylindrical structural member, and the kit body 102 is detachably connected to the elastic skeleton 121, so as to realize the detachable connection between the detachable kit 122 and the elastic skeleton 121. The plurality of ridges 103 can be an integrated structure with the kit body 102. The plurality of ridges 103 are fixed to the outer wall of the kit body 102 along the circumferential direction of the kit body 102. The plurality of ridges 103 protrude from the outer wall of the rigid barrel body 11 and extend along the central axis direction of the kit body 102, and the central axis direction of the kit body 102 is consistent with the central axis direction of the rigid barrel body 11. In this case, a groove structure is formed on the outer wall surface of the detachable kit 122, so that the equivalent circulating density of the drilling fluid can be reduced, which is beneficial to reducing the aggregation of the mud cake.

[0039] In the embodiment of the present invention, the rigid barrel body 11 can be made of metal material. For example, the rigid barrel body 11 can be a cast iron. As described above, the rigid barrel body 11 is a cylindrical structure. Specifically, the outer diameters of various parts of the rigid barrel body 11 can be equal or unequal. In one embodiment, the rigid barrel body 11 can be a stepped structure. The rigid barrel body 11 includes a first barrel section 112 and a second barrel section 113 that are connected and coaxial to each other. Figure 1 As shown, the outer diameters of the first barrel section 112 and the second barrel section 113 are not equal. Specifically, the diameter of the first barrel section 112 is larger than the diameter of the second barrel section 113. It should be explained that the diameter of the first barrel section 112 refers to the outer diameter of the first barrel section 112. The diameter of the second barrel section 113 refers to the outer diameter of the second barrel section 113. An annular limiting surface is formed at the junction of the first barrel section 112 and the second barrel section 113, and the elastic sleeve assembly 12 is sleeved on the second barrel section 113. The first end of the elastic sleeve assembly 12 is in axial limiting contact with the annular limiting surface of the drill pipe. At this time, the elastic sleeve assembly 12 can be limited by the annular limiting surface, so that its axial movement along the drill pipe can be alleviated, which is conducive to improving the stability of the installation of the elastic sleeve assembly 12.

[0040] As described above, the rigid barrel bodies 11 of two adjacent drill rod docking units 10 are detachably connected, thereby realizing the docking of two adjacent drill rod docking units 10. Specifically, two adjacent rigid barrel bodies 11 can be directly detachably connected, for example, the docking ends of the two rigid barrel bodies 11 are directly threaded. Of course, two adjacent rigid barrel bodies 11 can also be indirectly detachably connected through an intermediate piece. Therefore, in one embodiment, the drill rod disclosed in the embodiment of the present invention can also include a plurality of connection kits 20, and the connection kits 20 play a connecting role, and each connection kit 20 can be detachably connected to the rigid barrel bodies 11 of two adjacent drill rod docking units 10, thereby realizing the detachable connection between two adjacent drill rod docking units 10.

[0041] Specifically, the rigid barrel bodies 11 of the two adjacent drill rod docking units 10 can be fixed to the opposite ends of the connection kit 20 by threaded matching. Specifically, the second barrel section 113 of each rigid barrel body 11 is threadedly matched with the end of the connection kit 20, so as to realize the threaded connection between the rigid barrel body 11 and the end of the connection kit 20. In this case, the connection kit 20 plays a connecting role, and the size in the axial direction of the drill rod is much smaller than the size of the drill rod docking unit 10 in the axial direction of the drill rod. During the connection process, the operator only needs to rotate the connection kit 20 to realize the threaded connection or disassembly between the two ends of the connection kit 20 and the two adjacent rigid barrel bodies 11. It can be seen that this method of connecting two adjacent drill rod docking units 10 through the connection kit 20 makes the disassembly operation relatively simple and easy.

[0042] More specifically, the connection kit 20 can be sleeved outside the second barrel section 113, and the end face of the connection kit 20 opposite to the annular limiting surface can contact the second end of the elastic sleeve assembly 12 in the axial limiting of the drill pipe. The connection kit 20, the annular limiting surface and the outer wall of the second barrel section 113 can form an annular positioning groove 111, and the elastic sleeve assembly 12 can be positioned in the annular positioning groove 111. In this case, the annular limiting surface and the connection kit 20 can limit the elastic sleeve assembly 12 in two opposite directions, respectively, so that the elastic sleeve assembly 12 can be installed on the rigid barrel body 11 more stably. Specifically, the two ends of the elastic sleeve assembly 12 respectively conflict with the annular limiting surface and the end face of the connection kit 20, so that the installation of the elastic sleeve assembly 12 can be more stable.

[0043] Optionally, an annular isolation protrusion 40 may be fixed in each connection kit 20. Specifically, the central axis of the annular isolation protrusion 40 may be colinear with the central axis of the connection kit 20. In the two rigid barrel bodies 11 connected to the connection kit 20, the second barrel section 113 of the upper rigid barrel body 11 may abut against one side of the annular isolation protrusion 40, and the first barrel section 112 of the lower rigid barrel body 11 abuts against the other side of the annular isolation protrusion 40. In this case, the annular isolation protrusion 40 can avoid the pressure loss of the two adjacent rigid barrel bodies 11 due to the collision, and also avoid the problem of poor strength of the entire drill pipe caused by the gap between the two adjacent rigid barrel bodies 11. At the same time, the annular isolation protrusion 40 can play a reinforcing role similar to the reinforcing protrusion, so that the overall strength of the connection kit 20 is higher, which is conducive to playing a more stable connection function.

[0044] An embodiment of the present invention discloses a top drive drilling device, which includes the drill rod described in the above embodiment.

[0045] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A drill pipe for a top drive drilling device, characterized in that: The invention comprises a plurality of drill pipe docking units (10), wherein the drill pipe docking units (10) comprise a rigid barrel body (11) and an elastic sleeve assembly (12) sleeved outside the rigid barrel body (11) and fixed to the rigid barrel body (11), wherein a portion of the elastic sleeve assembly (12) protrudes from the outer wall of the rigid barrel body (11) and is used to generate soft friction with the inner wall of the gas layer casing of the top drive drilling device, and the rigid barrel bodies (11) of two adjacent drill pipe docking units (10) are detachable. The rigid barrel body (11) is a stepped structure, and comprises a first barrel section (112) and a second barrel section (113) which are connected to each other and coaxial, the diameter of the first barrel section (112) being larger than the diameter of the second barrel section (113), and an annular limiting surface is formed at the junction of the two, the elastic sleeve assembly (12) is sleeved on the second barrel section (113), and the first end of the elastic sleeve assembly (12) is in axial limiting contact with the annular limiting surface of the drill rod; The drill rod further comprises a plurality of connection sets (20), the rigid barrel bodies (11) of two adjacent drill rod docking units (10) being respectively fixed to opposite ends of the connection sets (20) by threaded engagement, and the second barrel section (113) being threadedly engaged with the end of the connection sets (20); The connection sleeve (20) is sleeved outside the second barrel section (113); an end surface of the connection sleeve (20) opposite to the annular limiting surface is in axial limiting contact with the second end of the elastic sleeve assembly (12) of the drill pipe; the connection sleeve (20), the annular limiting surface and the outer wall of the second barrel section (113) form an annular positioning groove (111); and the elastic sleeve assembly (12) is positioned in the annular positioning groove (111); An annular isolating protrusion (40) is fixed in each of the connecting sets (20), and the central axis of the annular isolating protrusion (40) is colinear with the central axis of the connecting set (20). In the two rigid cylinder bodies (11) connected to the connecting sets (20), the second cylinder section (113) of the rigid cylinder body (11) located at the top abuts against one side of the annular isolating protrusion (40), and the first cylinder section (112) of the rigid cylinder body (11) located at the bottom abuts against the other side of the annular isolating protrusion (40) opposite to the first cylinder section (112); both ends of the rigid cylinder body (11) are male connectors, and both ends of the connecting sets (20) are female connectors.

2. The drill pipe according to claim 1, characterized in that: The elastic sleeve assembly (12) comprises an elastic skeleton (121) and a detachable sleeve (122), both of which are cylindrical structures; the elastic skeleton (121) is fixed to the outer wall of the rigid cylinder body (11); and the detachable sleeve (122) is detachably sleeved on the elastic skeleton (121).

3. The drill pipe according to claim 2, characterized in that: The elastic skeleton (121) is provided with a hanging hole (101), and the detachable kit (122) has a hanging protrusion, and the hanging protrusion is positioned in the corresponding hanging hole (101) to detachably connect the detachable kit (122) and the elastic skeleton (121).

4. The drill pipe according to claim 2, characterized in that: The detachable kit (122) comprises a kit body (102) and a plurality of ridges (103), wherein the plurality of ridges (103) are fixed to the outer wall of the kit body (102) along the circumferential direction of the kit body (102), the plurality of ridges (103) protrude from the outer wall of the rigid tube body (11) and extend along the central axis direction of the kit body (102), and the central axis direction of the kit body (102) is consistent with the central axis direction of the rigid tube body (11).

5. The drill pipe according to claim 2, characterized in that: The material of the detachable kit (122) is thermoplastic polyurethane.

6. A top drive drilling device, characterized in that: The drill rod comprises the drill rod according to any one of claims 1 to 5.

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