A wireline coring directional drilling tool gear mechanism and drilling method

Abstract

The application discloses a kind of rope coring directional drilling tool sub-transmission mechanism and drilling method, it is related to rope coring drilling technical field, when shell system structure and shaft system structure separate, shell system structure and shaft system structure can relatively rotate, one end of drill pipe joint is used to connect with drill pipe, the other end of drill pipe joint is threadedly connected with shaft system structure, upper guide rail structure and lower guide rail structure are located on the inner wall of shaft system structure, piston is slidably connected with drill pipe joint and shaft system structure respectively, one end of elastic element is abutted with drill pipe joint, the other end of elastic element is abutted with piston, piston and guide ring structure can relatively rotate, the relative position of piston and guide ring structure is fixed in the axial direction, the guide block of guide ring structure can enter upper guide rail groove of upper guide rail structure and lower guide rail groove of lower guide rail structure.The application can only make shaft system structure rotate when directional drilling, make shaft system structure and shell system structure rotate simultaneously when non-directional drilling.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wire-line coring drilling, in particular to a wire-line coring directional drilling tool distribution mechanism and a drilling method. BACKGROUND

[0002] Directional drilling technology is one of the important technical means for oil and gas exploration and yield increase. The directional drilling technology related to oil drilling develops rapidly, and various instruments are widely used. Geological core drilling is mainly aimed at obtaining cores, and currently mainly uses wire-line coring technology. With the increasing depth of geological core exploration and the popularization of the concept of green exploration, directional drilling technology has also gradually been valued in the field of geological core drilling. However, how to highly integrate directional drilling technology with wire-line coring technology is the key to its wide application in the field of geological core drilling.

[0003] Traditional directional drilling needs to use screw drill tools and turbine drill tools to drive the drill bit in order to provide a stable tool face. In combination with the wire-line coring technology, some researchers design the downhole power tool into a hollow structure and place it in the wire-line coring outer assembly. Some other researchers sacrifice the outer diameter of the downhole power tool and use it as part of the wire-line coring inner assembly. However, the above methods cannot get rid of the fact that the downhole power tool is used, and the mud pump and the surface manifold have high requirements. The mud pump is often a weak point in geological core exploration. Another technology is to use the surface drilling machine to drive the downhole drill bit for directional drilling, but the rotation of the upper drill pipe needs to be distributed to realize the non-rotation of the downhole tool shell and provide a stable tool face. How to realize the distribution is the key to this technology. SUMMARY

[0004] The present application aims to provide a wire-line coring directional drilling tool distribution mechanism and a drilling method, which can only rotate the shaft system structure during directional drilling and rotate the shaft system structure and the shell system structure at the same time during non-directional drilling.

[0005] To achieve the above-mentioned purpose, the present application provides the following solutions:

[0006] The application provides a rope core directional drilling tool distribution mechanism, which comprises a drill rod joint, a shell system and a shaft system, the shell system and the shaft system can be connected or separated, the shell system and the shaft system can rotate relative to each other when the shell system and the shaft system are separated, one end of the drill rod joint is used for being connected with a drill rod, the other end of the drill rod joint is inserted into the shaft system from one end of the shaft system, the drill rod joint is threadedly connected with the shaft system, a piston, a guide ring structure, an elastic element, an upper guide rail structure and a lower guide rail structure are arranged between the drill rod joint and the shaft system, the upper guide rail structure and the lower guide rail structure are located on the inner wall of the shaft system, the piston is slidably connected with the drill rod joint and the shaft system respectively, one end of the elastic element is in abutment with the drill rod joint, the other end of the elastic element is in abutment with the piston, the piston and the guide ring structure can rotate relative to each other, the axial relative position of the piston and the guide ring structure is fixed, and the guide block of the guide ring structure can enter the upper guide rail groove of the upper guide rail structure and the lower guide rail groove of the lower guide rail structure.

[0007] Preferably, the upper guide rail structure is located above the lower guide rail structure, the upper guide rail structure comprises an upper guide rail body, a plurality of upper guide rail grooves are formed in the circumferential direction of the upper guide rail body, and a first inclined surface is arranged on the upper guide rail body between adjacent upper guide rail grooves.

[0008] Preferably, the lower guide rail structure comprises a lower guide rail body, the lower guide rail grooves comprise shallow grooves and deep grooves, the depth of the shallow grooves is smaller than that of the deep grooves, a plurality of the deep grooves and the shallow grooves are alternately formed in the circumferential direction of the lower guide rail body, and a second inclined surface is arranged on the lower guide rail body between the deep grooves and the shallow grooves.

[0009] Preferably, the guide ring structure further comprises a guide ring body, the guide block is arranged at one end of the guide ring body, the guide block is provided with a third inclined surface and a fourth inclined surface, and the axial position of the piston and the guide ring structure is fixed relative to each other through a fixing nut.

[0010] Preferably, the widths of the upper guide rail grooves, the shallow grooves and the deep grooves are the same, the width of the upper guide rail body between adjacent upper guide rail grooves is the same as that of the lower guide rail body between the deep grooves and the shallow grooves, the tip of the first inclined surface points to the second inclined surface, the tip of the second inclined surface points to the first inclined surface, the third inclined surface is parallel to the first inclined surface, and the fourth inclined surface is parallel to the second inclined surface.

[0011] Preferably, a side wall of the piston is provided with a distribution bolt, the distribution bolt passes through the strip-shaped hole of the shafting structure, when the guide block of the guide ring structure is located in the deep groove of the lower guide rail structure, the distribution bolt enters the end face groove of the shell structure, and the shell structure and the shafting structure are connected.

[0012] Preferably, the drill pipe joint, the shell structure and the shafting structure are all hollow structures.

[0013] Preferably, the shell structure comprises a bolt joint, a sealing joint, a bearing cavity shell and a conversion joint which are sequentially threaded, and the bolt joint is provided with the end face groove at one end.

[0014] Preferably, the shafting structure comprises a distribution joint, a bearing shaft and a double common shaft joint which are sequentially threaded, one end of the distribution joint is threadedly connected with the drill pipe joint, the side wall of the distribution joint is provided with the strip-shaped hole, and the bearing shaft is provided with a bearing between the bearing cavity shell.

[0015] The application also provides a drilling method using the distribution mechanism of the wire-line coring directional drilling tool, and the drilling method comprises the following working conditions:

[0016] In the working condition one, when directional drilling, the guide block of the guide ring structure enters the shallow groove of the lower guide rail structure, the distribution bolt is not in contact with the bolt joint, the drill pipe drives the shafting structure to rotate through the drill pipe joint, and the shell structure does not rotate, so that directional drilling is realized.

[0017] In the working condition two, when non-directional drilling, the mud displacement is increased, the piston drives the guide ring structure to move in the direction away from the upper guide rail structure, the guide block of the guide ring structure enters the upper guide rail groove of the upper guide rail structure, the mud displacement is restored, the piston drives the guide ring structure to move in the direction away from the upper guide rail structure under the action of the elastic element, the guide block of the guide ring structure enters the deep groove of the lower guide rail structure, the distribution bolt enters the end face groove of the bolt joint, the shafting structure and the shell structure are connected, the drill pipe drives the shafting structure and the shell structure to rotate synchronously through the drill pipe joint, and non-directional drilling is realized.

[0018] The application has the following technical effects relative to the prior art:

[0019] The rope coring directional drilling tool distribution mechanism of the application adopts a double-layer pipe structure, i.e. an outer shell system structure and an inner shaft system structure. The rope coring directional drilling tool distribution mechanism of the application can realize distribution of the rotating power transmitted by the upper drill pipe under the action of mud pressure. During directional drilling, the upper rotating power only drives the shaft system structure, and the shell system structure does not rotate, thereby providing a stable tool face and realizing directional drilling; during non-directional drilling such as reaming, the upper rotating power drives the shell system structure and the shaft system structure, thereby realizing conventional drilling. Thus, directional drilling driven by the surface drilling machine based on the existing rope coring technology is realized. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only constitute some embodiments of the application, and for those skilled in the art, other drawings can also be obtained based on these drawings without creative labor.

[0021] Figure 1 Directional drilling schematic diagram of the rope coring directional drilling tool distribution mechanism of the application;

[0022] Figure 2 Non-directional drilling schematic diagram of the rope coring directional drilling tool distribution mechanism of the application;

[0023] Figure 3 Stereogram of the upper guide rail structure of the application;

[0024] Figure 4 Front view of the upper guide rail structure of the application;

[0025] Figure 5 Stereogram of the lower guide rail structure of the application;

[0026] Figure 6 Front view of the lower guide rail structure of the application;

[0027] Figure 7 Stereogram of the guide ring structure of the application;

[0028] Figure 8 Sectional view of the guide ring structure of the application;

[0029] Figure 9 Side view of the guide ring structure of the application;

[0030] Figure 10 Schematic diagram of the guide block of the application;

[0031] Figure 11 Sectional view of the distribution joint of the application;

[0032] Figure 12 is a bolt joint sectional view of the present application;

[0033] Figure 13 is a schematic view of the mounting cooperation relationship of the upper rail structure, the lower rail structure and the guide block of the present application;

[0034] Wherein: 1 is a drill pipe joint; 2 is a split joint; 3 is an upper rail structure; 4 is a lower rail structure; 5 is a guide ring structure; 6 is an elastic element; 7 is a fixed nut; 8 is a piston; 9 is a split bolt; 10 is a sealing ring I; 11 is a bolt joint; 12 is a sealing joint; 13 is a sealing ring II; 14 is a bearing shaft; 15 is a bearing cavity shell; 16 is a bearing set; 17 is a conversion joint; 18 is a double male shaft joint; 19 is an upper rail groove; 20 is a first inclined surface; 21 is a shallow groove; 22 is a deep groove; 23 is a second inclined surface; 24 is a guide ring body; 25 is a guide block; 26 is a strip-shaped hole; 27 is an end face groove; 28 is a third inclined surface; 29 is a fourth inclined surface. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the scope of protection of the present application.

[0036] The purpose of the present application is to provide a wire-line coring directional drilling tool split mechanism and drilling method, which can only rotate the shaft structure during directional drilling, and rotate the shaft structure and the shell structure at the same time during non-directional drilling.

[0037] In order to make the above-mentioned purposes, characteristics and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0038] Embodiment one

[0039] As Figures 1 to 13The embodiment provides a rope coring directional drilling tool distribution mechanism, which is characterized by comprising a drill rod joint 1, a shell system and a shaft system, the shell system is sleeved outside the shaft system, the drill rod joint 1, the shell system and the shaft system are all hollow structures, a central through hole of the hollow structure is a rope coring inner assembly fishing and launching channel, the shell system and the shaft system can be connected or separated, and the shell system and the shaft system can rotate relative to each other when the shell system and the shaft system are separated; the shell system comprises bolt joints 11, sealing joints 12, bearing cavity shells 15 and conversion joints 17 which are sequentially and threadedly connected from top to bottom, and an end face groove 27 is arranged at the upper end of the bolt joint 11; the shaft system comprises distribution joints 2, bearing shafts 14 and double common shaft joints 18 which are sequentially and threadedly connected from top to bottom, a strip-shaped hole 26 is arranged in the side wall of the distribution joint 2, bearings or bearing groups 16 are arranged in the annular cavity formed by the bearing shaft 14 and the bearing cavity shell 15, and sealing rings II 13 are arranged in the annular cavity formed by the bolt joint 11, the sealing joint 12 and the bearing shaft 14.

[0040] In the embodiment, the upper end of the drill rod joint 1 is used for being connected with a drill rod, the lower end of the drill rod joint 1 is inserted into the distribution joint 2 from the upper end of the distribution joint 2, the drill rod joint 1 is threadedly connected with the distribution joint 2, a piston 8, a guide ring structure 5, an elastic element 6, an upper guide rail structure 3 and a lower guide rail structure 4 are arranged in the cavity between the drill rod joint 1 and the distribution joint 2, the upper guide rail structure 3 and the lower guide rail structure 4 are both fixed on the inner wall of the distribution joint 2, the piston 8 is slidably connected with the drill rod joint 1 and the distribution joint 2 respectively, the elastic element 6 is preferably a compression spring, the elastic element 6 is sleeved on the thin end of the drill rod joint 1, the upper end of the elastic element 6 abuts against the step of the drill rod joint 1, the lower end of the elastic element 6 abuts against the thin end of the piston 8, the inner side and the outer side of the piston 8 are both provided with sealing grooves, sealing rings I 10 are arranged in the sealing grooves, the cavity between the drill rod joint 1 and the distribution joint 2 is in communication with the central through hole of the drill rod joint 1, that is, the lower end of the piston 8 can be in contact with the mud in the central through hole, a distribution bolt 9 is arranged on the outer side wall of the piston 8, the distribution bolt 9 can pass through the strip-shaped hole 26 of the distribution joint 2, the piston 8 and the guide ring structure 5 can rotate relative to each other, the guide ring structure 5 comprises a guide ring body 24 and two guide blocks 25, the two guide blocks 25 are symmetrically arranged at the upper end of the guide ring body 24, the guide ring body 24 is sleeved on the thin end of the piston 8 and the axial positions of the piston 8 and the guide ring structure 5 are relatively fixed through a fixed nut 7, and the guide blocks 25 of the guide ring structure 5 can enter the upper guide rail grooves 19 of the upper guide rail structure 3 and the lower guide rail grooves of the lower guide rail structure 4.

[0041] Specifically, in the embodiment, the upper guide rail structure 3 is located above the lower guide rail structure 4, the upper guide rail structure 3 comprises an upper guide rail body, and a plurality of upper guide rail grooves 19 are circumferentially formed in the upper guide rail body, and a first inclined surface 20 is arranged at an opening end of the upper guide rail groove 19 between adjacent upper guide rail grooves 19.

[0042] In the embodiment, the lower guide rail structure 4 comprises a lower guide rail body, the lower guide rail groove comprises a shallow groove 21 and a deep groove 22, the depth of the shallow groove 21 is less than the depth of the deep groove 22, a plurality of deep grooves 22 and shallow grooves 21 are alternately formed in the lower guide rail body along the circumference of the lower guide rail body, and a second inclined surface 23 is arranged at an opening end of the deep groove 22 and the shallow groove 21 between the deep groove 22 and the shallow groove 21. The second inclined surface 23 has the same inclination angle as the first inclined surface 20, and the inclination direction of the second inclined surface 23 is different from that of the first inclined surface 20.

[0043] In the embodiment, the inner diameters of the upper guide rail body and the lower guide rail body are the same, the outer diameters of the upper guide rail body and the lower guide rail body are the same, the widths of the upper guide rail grooves 19, the shallow grooves 21 and the deep grooves 22 are the same, the width of the upper guide rail body between adjacent upper guide rail grooves 19 is the same as the width of the lower guide rail body between the deep grooves 22 and the shallow grooves 21, the tip of the first inclined surface 20 points to the second inclined surface 23, and the tip of the second inclined surface 23 points to the first inclined surface 20, that is, the upper guide rail groove 19 is oppositely arranged with the lower guide rail body between the deep groove 22 and the shallow groove 21, and the deep groove 22 and the shallow groove 21 are oppositely arranged with the upper guide rail body between adjacent upper guide rail grooves 19.

[0044] In the embodiment, the guide block 25 has a third inclined surface 28 and a fourth inclined surface 29, the third inclined surface 28 is located above the fourth inclined surface 29, the third inclined surface 28 is parallel to the first inclined surface 20, and the fourth inclined surface 29 is parallel to the second inclined surface 23.

[0045] In the embodiment, when the guide block 25 of the guide ring structure 5 is located in the deep groove 22 of the lower guide rail structure 4, the transfer bolt 9 enters the end face groove 27 of the shell system structure, thereby realizing the connection between the shell system structure and the shaft system structure.

[0046] During directional drilling, the guide block 25 falls into the shallow groove 21 of the lower guide rail, and due to the position limitation of the shallow groove 21, the piston 8 cannot be completely returned (cannot be completely returned to the lower position), and the position of the transfer bolt 9 is at the upper end of the bolt joint 11, and the two are not in contact. While the transfer joint 2 is driven by the upper drill rod, the remaining structures of the shaft system structure are rotated, and the shell system structure does not rotate, thereby providing a stable tool face.

[0047] When the tool state needs to be changed, the mud discharge rate is increased, thereby increasing the pressure difference between the inside and outside of the tool. The piston 8 moves upward under the action of hydraulic pressure, pushing the guide ring structure 5 upward. The guide block 25 rotates under the action of the first inclined surface 20 of the upper guide rail structure 3 and falls into the upper guide rail groove 19. At the same time, the elastic element 6 is compressed. To restore the normal mud discharge rate, the piston 8 moves downward under the action of the elastic element 6, thereby driving the guide ring structure 5 downward. The guide block 25 rotates under the action of the second inclined surface 23 of the lower guide rail structure 4 and falls into the deep groove 22 of the lower guide rail. The piston 8 returns to its original position (completely back to the lower position), and the transfer bolt 9 falls into the end face groove 27 of the bolt joint 11. The transfer joint 2 is driven by the upper drill pipe, which drives the rotation of the rest of the shaft system structure. At the same time, the transfer bolt 9 drives the bolt joint 11 to rotate, thereby driving the entire shell system structure and shaft system structure to rotate synchronously for conventional drilling.

[0048] Similarly, the drilling states of downhole tools, such as directional and non-directional drilling, can be freely switched.

[0049] The wireline coring directional drilling tool's drive mechanism in this embodiment adopts a double-layered tubular structure, consisting of an outer shell structure and an inner shaft structure. Under the pressure of the drilling mud, this drive mechanism can distribute the rotational power transmitted from the upper drill pipe. During directional drilling, the upper rotational power only drives the shaft structure, while the shell structure remains stationary, providing a stable tool face for directional drilling. During non-directional drilling such as reaming, the upper rotational power simultaneously drives both the shell and shaft structures for conventional drilling. This achieves directional drilling driven by a ground drilling rig based on existing wireline coring technology.

[0050] The wireline coring directional drilling tool transfer mechanism in this embodiment helps to realize directional (skewed) coring drilling based on traditional wireline coring technology, without requiring special mud pumps, surface pipelines, etc., avoiding the use of bottom hole power tools, and the bottom hole drill bit is completely driven by the surface drilling rig.

[0051] Example 2

[0052] This embodiment provides a drilling method using the wireline coring directional drilling tool transfer mechanism of Embodiment 1, including the following working conditions:

[0053] Operating condition one, such as Figure 1 As shown, during directional drilling, the guide block 25 of the guide ring structure 5 enters the shallow groove 21 of the lower guide rail structure 4, the detachable bolt 9 and the bolt joint 11 are not in contact, the drill rod drives the shaft structure to rotate through the drill rod joint 1, and the shell structure does not rotate, thus realizing directional drilling;

[0054] Operating condition two, such as Figure 2As shown, in non-directional drilling, the mud displacement is increased, the piston 8 pushes the guide ring structure 5 to move in the direction of the upper rail structure 3, the guide block 25 of the guide ring structure 5 enters the upper rail groove 19 of the upper rail structure 3; the normal mud displacement is restored, the piston 8 drives the guide ring structure 5 to move away from the upper rail structure 3 under the action of the elastic element 6, the guide block 25 of the guide ring structure 5 enters the deep groove 22 of the lower rail structure 4, the split bolt 9 enters the end face groove 27 of the bolt joint 11, the connection of the shaft system structure and the shell system structure is realized, the drill rod drives the shaft system structure and the shell system structure to rotate synchronously through the drill rod joint 1, and non-directional drilling is realized.

[0055] The principles and implementation manners of the present application are described in the specification by applying specific examples, and the above description of the examples is only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, the specific implementation manners and application ranges will be changed according to the idea of the present application. In conclusion, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A wireline coring directional drilling tool gear mechanism characterized by: The application relates to a drill rod joint, a shell system and a shaft system, the shell system and the shaft system can be connected or separated, the shell system and the shaft system can rotate relatively when the shell system and the shaft system are separated, one end of the drill rod joint is used for being connected with a drill rod, the other end of the drill rod joint is inserted into the shaft system from one end of the shaft system, the drill rod joint is threadedly connected with the shaft system, a piston, a guide ring structure, an elastic element, an upper guide rail structure and a lower guide rail structure are arranged between the drill rod joint and the shaft system, the upper guide rail structure and the lower guide rail structure are located on the inner wall of the shaft system, the piston is slidably connected with the drill rod joint and the shaft system respectively, one end of the elastic element abuts against the drill rod joint, the other end of the elastic element abuts against the piston, the piston and the guide ring structure can rotate relatively, the axial relative position of the piston and the guide ring structure is fixed, the guide block of the guide ring structure can enter the upper guide rail groove of the upper guide rail structure and the lower guide rail groove of the lower guide rail structure. The upper guide rail structure is located above the lower guide rail structure, the upper guide rail structure comprises an upper guide rail body, a plurality of upper guide rail grooves are formed in the circumferential direction of the upper guide rail body, and a first inclined surface is arranged on the upper guide rail body between adjacent upper guide rail grooves. The lower guide rail structure comprises a lower guide rail body, the lower guide rail groove comprises a shallow groove and a deep groove, the depth of the shallow groove is smaller than the depth of the deep groove, a plurality of deep grooves and shallow grooves are alternately formed in the circumferential direction of the lower guide rail body, and a second inclined surface is arranged on the lower guide rail body between the deep grooves and the shallow grooves. The guide ring structure further comprises a guide ring body, the guide block is arranged at one end of the guide ring body, the guide block is provided with a third inclined surface and a fourth inclined surface, and the axial position of the piston and the guide ring structure is fixed relatively by a fixing nut.

2. The wireline coring directional drilling tool gear mechanism of claim 1, wherein: The widths of the upper guide rail groove, the shallow groove and the deep groove are the same, the width of the upper guide rail body between adjacent upper guide rail grooves is the same as the width of the lower guide rail body between the deep grooves and the shallow grooves, the tip of the first inclined surface points to the second inclined surface, the tip of the second inclined surface points to the first inclined surface, the third inclined surface is parallel to the first inclined surface, and the fourth inclined surface is parallel to the second inclined surface.

3. The wireline coring directional drilling tool gear mechanism of claim 1, wherein: A split bolt is arranged on the side wall of the piston, the split bolt passes through a strip-shaped hole of the shaft system, when the guide block of the guide ring structure is located in the deep groove of the lower guide rail structure, the split bolt enters an end face groove of the shell system, and the shell system and the shaft system are connected.

4. The wire-line coring directional drilling tool gear mechanism of claim 1, wherein: The drill rod joint, the shell system and the shaft system are all hollow structures.

5. The wireline coring directional drilling tool gear mechanism of claim 3, wherein: The shell system comprises a bolt joint, a sealing joint, a bearing cavity shell body and a conversion joint which are threadedly connected in sequence, and the end face groove is arranged at one end of the bolt joint.

6. The wire-line coring directional drilling tool gear mechanism of claim 5, wherein: The shafting structure comprises a slip joint, a bearing shaft and a double common shaft joint which are threadedly connected in sequence, one end of the slip joint is threadedly connected with the drill pipe joint, the side wall of the slip joint is provided with the strip-shaped hole, and the bearing shaft is provided with the bearing between the bearing cavity shell.

7. A drilling method employing the swivel mechanism of the wire-line coring directional drilling tool according to any one of claims 1-6, characterized in that: The working conditions include the following: Working condition one, when directional drilling, the guide block of the guide ring structure enters the shallow groove of the lower guide rail structure, the split bolt is not in contact with the bolt joint, the drill pipe drives the shafting structure to rotate through the drill pipe joint, the shell system does not rotate, and directional drilling is realized; Working condition two, when non-directional drilling, the mud displacement is increased, the piston drives the guide ring structure to move in the direction of the upper guide rail structure, the guide block of the guide ring structure enters the upper guide rail groove of the upper guide rail structure; The normal mud displacement is restored, the piston drives the guide ring structure to move in the direction away from the upper guide rail structure under the action of the elastic element, the guide block of the guide ring structure enters the deep groove of the lower guide rail structure, the split bolt enters the end face groove of the bolt joint, the connection between the shafting structure and the shell system is realized, the drill pipe drives the shafting structure and the shell system to rotate synchronously through the drill pipe joint, and non-directional drilling is realized.

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