Near-drilling electromagnetic wave receiving module bearing assembly and protection drill collar assembly

Abstract

The present application belongs to the field of measurement while drilling technology, and discloses a near-drilling electromagnetic wave receiving module bearing assembly and a protection drill collar assembly. The near-drilling electromagnetic wave receiving module bearing assembly comprises a framework body, a first sealing assembly, a second sealing assembly and an exhaust assembly. The framework body is provided with a mud channel which is axially through and is arranged offset, and the outer circumferential surface is provided with a module mounting groove which extends along the axial direction. The first sealing assembly and the second sealing assembly are respectively arranged at the axial two ends of the framework body to form a space to be exhausted when the framework body is inserted into the protection drill collar. The exhaust assembly is in communication with the space to be exhausted, and exhausts before the framework body is inserted into the predetermined mounting position, and cuts off the communication between the space to be exhausted and the outside when the framework body is inserted into the predetermined mounting position. The near-drilling electromagnetic wave receiving module bearing assembly can take into account the mud flow and module installation, and reduce the air resistance in the insertion process.

Description

Technical Field

[0001] This invention relates to the field of measurement while drilling technology, and in particular to a near-drilling electromagnetic wave receiving module support assembly and a drill collar protection assembly. Background Technology

[0002] In oil, gas, and geological drilling, near-drilling electromagnetic wave receiving instruments typically need to be housed inside the drill collar, while the drill collar also needs to retain space for mud flow. Due to limitations in wellbore size and drill collar outer diameter, the space inside the drill collar available for mud flow and electronic module installation is relatively limited.

[0003] When the mud channel is centrally located, it occupies the central area of ​​the drill collar cross-section, leaving relatively dispersed space, which is not conducive to the centralized arrangement of electronic modules such as battery modules and receiving and control modules. If the size of the mud channel is reduced to increase the module installation space, it may affect the mud flow capacity. Therefore, there is a certain layout conflict between the mud flow space and the electronic module installation space.

[0004] On the other hand, the components carrying the electronic modules typically need to form a seal with the drill collar. When using a cartridge mounting method, the sealing structure gradually fits into the inner wall of the drill collar, which can easily compress the gas in the local space, thereby increasing the insertion resistance and affecting the insertion of the carrier components into the intended installation position. If an additional venting structure is installed, the reliability of the seal after installation must also be considered.

[0005] Therefore, it is necessary to improve the supporting structure of the near-drilling electromagnetic wave receiving module to reasonably balance mud flow and electronic module installation within the limited internal space of the drill collar, and reduce the impact of gas compression on installation during the sealing process. Summary of the Invention

[0006] One object of the present invention is to provide a near-drilling electromagnetic wave receiving module carrier assembly to improve the space constraints between mud flow and near-drilling electromagnetic wave receiving module installation in the limited internal space of the drill collar, and to reduce the impact of gas compression on installation during the sealing and insertion process.

[0007] To achieve this objective, the present invention adopts the following technical solution: This invention provides a near-drilling electromagnetic wave receiving module carrier assembly, comprising: a skeleton body having an axially extending mud channel, the axis of which is offset relative to the central axis of the skeleton body; the outer circumferential surface of the skeleton body being recessed inward to form at least one axially extending module mounting groove for mounting a near-drilling electromagnetic wave receiving module; a first sealing component and a second sealing component, respectively disposed at both axial ends of the skeleton body, the first sealing component and the second sealing component being used to seal against the inner wall of the protective drill collar when the skeleton body is inserted into it; the outer circumferential surface of the skeleton body, the inner wall of the protective drill collar, the first sealing component and the second sealing component jointly defining a space to be vented; and a venting component disposed on the skeleton body and communicating with the space to be vented. Before the skeleton body is inserted into a predetermined installation position, the venting component connects the space to be vented with the outside; when the skeleton body is inserted into the predetermined installation position, the venting component is subjected to pressure and cuts off the communication between the space to be vented and the outside.

[0008] Optionally, the skeleton body includes a main body and a connecting part. The main body has a first end and a second end that are arranged opposite each other along the axial direction. The connecting part extends outward along the axial direction from the first end, and the outer diameter of the connecting part is smaller than the outer diameter of the main body. The first sealing component is disposed on the connecting part, the second sealing component is disposed on the second end, the axial end face of the first end is provided with a mounting hole, and the exhaust component is disposed in the mounting hole.

[0009] Optionally, the exhaust assembly includes a piston rod and a clamping nut, both of which are disposed within the mounting hole. The clamping nut is sleeved on the outside of the piston rod and connected to the wall of the mounting hole, and the piston rod is movable relative to the clamping nut.

[0010] Optionally, the module mounting slot includes a first module mounting slot and a second module mounting slot. The plane passing through the central axis of the skeleton body and the axis of the mud channel is defined as the axial reference plane. The first module mounting slot and the second module mounting slot are respectively disposed on both sides of the axial reference plane and are symmetrically disposed about the axial reference plane.

[0011] Optionally, both the first sealing assembly and the second sealing assembly include at least one set of sealing units, each sealing unit including a sealing ring and a retaining ring. The sealing ring and the retaining ring are both sleeved on the outer periphery of the skeleton body, and the retaining ring is located on the axial side of the corresponding sealing ring and is adjacent to the sealing ring.

[0012] Optionally, the skeleton body is further provided with a first wear-resistant ring and a second wear-resistant ring. The first wear-resistant ring is sleeved on the outer periphery of the connecting part, and the first sealing component is located on the side of the first wear-resistant ring closer to the main body. The second wear-resistant ring is disposed at the second end, and the second sealing component is located on the side of the second wear-resistant ring closer to the first end.

[0013] Optionally, the skeleton body is further provided with a third wear-resistant ring, which is disposed on the axial end face of the first end and sleeved on the outer periphery of the connecting part.

[0014] Optionally, the axial end face of the first end is further provided with a positioning hole and a single-core insertion hole. The positioning hole is used to define the circumferential installation position of the skeleton body, and the single-core insertion hole is used for electrical connection. The positioning hole, the single-core insertion hole and the mounting hole are circumferentially spaced on the axial end face of the first end around the connecting part.

[0015] Optionally, the second end is provided with a communication connector, and one or more of the near-drilling electromagnetic wave receiving modules are installed in the module mounting slot. The single-core socket and the communication connector are respectively electrically connected to at least one of the near-drilling electromagnetic wave receiving modules.

[0016] Another object of the present invention is to provide a protective drill collar assembly to achieve the fit and sealing between the near-drilling electromagnetic wave receiving module carrier assembly and the protective drill collar.

[0017] To achieve this objective, the present invention adopts the following technical solution: The present invention also provides a drill collar protection assembly, which includes a drill collar protection and the aforementioned near-drilling electromagnetic wave receiving module carrier assembly. The drill collar protection has an axially extending inner hole, the near-drilling electromagnetic wave receiving module carrier assembly is inserted into the inner hole, and the first sealing assembly and the second sealing assembly respectively seal with the hole wall of the inner hole.

[0018] Beneficial effects: The near-drilling electromagnetic wave receiving module carrier assembly provided by this invention, by offsetting the mud channel relative to the central axis of the skeleton body and providing a module mounting groove on the outer periphery of the skeleton body, can simultaneously accommodate mud flow and the installation of the near-drilling electromagnetic wave receiving module within a limited radial space. The first and second sealing components form a venting space between the skeleton body and the protective drill collar. The venting component connects this venting space to the outside before the skeleton body is inserted into the predetermined installation position and cuts off this connection when the skeleton body is inserted into the predetermined installation position, thereby reducing the insertion resistance generated by gas compression and meeting the sealing requirements after insertion into the predetermined installation position.

[0019] The protective drill collar assembly provided by the present invention, by inserting the aforementioned near-drilling electromagnetic wave receiving module carrier assembly into the inner hole of the protective drill collar, and by sealing the first sealing assembly and the second sealing assembly with the hole wall of the inner hole respectively, can realize the insertion and sealing between the near-drilling electromagnetic wave receiving module carrier assembly and the protective drill collar, and simultaneously meet the requirements of mud flow and near-drilling electromagnetic wave receiving module installation inside the protective drill collar. Attached Figure Description

[0020] Figure 1 A schematic diagram of the structure of the near-drilling electromagnetic wave receiving module carrier assembly provided in an embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the near-drilling electromagnetic wave receiving module carrier component from another perspective; Figure 3 for Figure 1 The diagram shows a cross-sectional view of the near-drilling electromagnetic wave receiving module carrier assembly taken along the central axis of the mud channel. Figure 4 for Figure 3 A magnified schematic diagram of the local structure at point A; Figure 5 A schematic diagram of the structure of the protective drill collar assembly provided in an embodiment of the present invention; Figure 6 for Figure 5 The diagram shows a cross-sectional view of the protective drill collar assembly taken along the central axis of the inner bore.

[0021] In the picture: 100. Near-drilling electromagnetic wave receiving module; 200. Drill collar protection; 201. Inner bore; 10. Skeleton body; 11. Mud channel; 12. Module mounting slot; 120. First module mounting slot; 121. Second module mounting slot; 13. Main body; 14. Connecting part; 15. Positioning hole; 16. Single core socket; 20. First sealing assembly; 21. Second sealing assembly; 22. Sealing unit; 23. Sealing ring; 24. Retaining ring; 30. Exhaust assembly; 31. Piston rod; 32. Compression nut; 40. First wear-resistant ring; 41. Second wear-resistant ring; 42. Third wear-resistant ring; 43. Anode ring; 44. Positioning ring; 45. Grounding spring; 46. Support ring; 50. Communication connectors; D1, Axial direction; D2, Radial direction; D3, Circumferential direction. Detailed Implementation

[0022] Exemplary embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are for teaching those skilled in the art how to implement the invention, and are not intended to exhaustively describe all possible embodiments of the invention, nor to limit the scope of the invention.

[0023] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] For ease of description, the direction of extension of the central axis of the skeleton body 10 is defined as axial direction D1, the direction perpendicular to the central axis of the skeleton body 10 and extending outward from the central axis is defined as radial direction D2, and the direction around the central axis of the skeleton body 10 is defined as circumferential direction D3. It should be noted that the above directions are only used to illustrate the relative positional relationship between the various structures and do not constitute a limitation on the actual installation direction or use direction of the near-drilling electromagnetic wave receiving module carrier components.

[0026] like Figures 1 to 4 As shown, this embodiment provides a near-drilling electromagnetic wave receiving module carrier assembly, including a skeleton body 10, a first sealing assembly 20, a second sealing assembly 21, and an exhaust assembly 30. The skeleton body 10 can be inserted into the inner hole 201 of the protective drill collar 200 along the axial direction D1. A mud channel 11 is formed inside the skeleton body 10 and extends along the axial direction D1. The axis of the mud channel 11 is offset relative to the central axis of the skeleton body 10. The outer peripheral surface of the skeleton body 10 is recessed inward to form at least one module mounting groove 12 extending along the axial direction D1. The module mounting groove 12 is used to install the near-drilling electromagnetic wave receiving module 100.

[0027] The first sealing component 20 and the second sealing component 21 are respectively disposed at both axial ends of the skeleton body 10, and are used to seal against the inner wall of the protective drill collar 200 when the skeleton body 10 is inserted into the protective drill collar 200. The outer peripheral surface of the skeleton body 10, the inner wall of the protective drill collar 200, the first sealing component 20, and the second sealing component 21 together define the space to be vented. The venting component 30 is disposed on the skeleton body 10 and communicates with the space to be vented. It is used to vent the gas in the space to be vented before the skeleton body 10 is inserted into the predetermined installation position, and closes the communication between the space to be vented and the outside when the skeleton body 10 is inserted into the predetermined installation position.

[0028] With the above settings, the biased mud channel 11 can provide more usable space for the installation of the near-drilling electromagnetic wave receiving module 100; at the same time, the exhaust assembly 30 can reduce the gas resistance caused by gas compression during the sealing and insertion of the skeleton body 10, and close the exhaust path when the skeleton body 10 is inserted into the predetermined installation position.

[0029] like Figure 5 and Figure 6 As shown, the skeleton body 10 is a long shaft-shaped support extending along the axial direction D1, and its outer contour is adapted to the inner hole 201 of the drill collar 200. The mud channel 11 extends through both axial ends of the skeleton body 10 for the passage of drilling mud. See also... Figure 2 The axis of the mud channel 11 is spaced apart from the central axis of the skeleton body 10, so that the mud channel 11 forms an offset mud channel.

[0030] In this embodiment, the skeleton body 10 is made of metal material, and the mud channel 11, module mounting groove 12 and other hole and groove structures on the skeleton body 10 can be formed by machining.

[0031] It is understood that the offset of the mud channel 11 can be determined based on the size of the near-drilling electromagnetic wave receiving module 100, the pressure-bearing wall thickness of the skeleton body 10, the mud flow rate, and the erosion resistance requirements. The flow cross-sectional size of the mud channel 11 can be determined based on the wellbore size and mud flow requirements. For example, when the cross-section of the mud channel 11 is circular, its diameter can be 31.75 mm.

[0032] like Figure 1 As shown, the module mounting slot 12 is formed by an inward recess from the outer periphery of the skeleton body 10 and extends along the axial direction D1 to accommodate the near-drilling electromagnetic wave receiving module 100. Since the central axis of the skeleton body 10 and the axis of the mud channel 11 both extend along the axial direction D1 and are spaced apart from each other, they define a plane. For ease of description, the plane passing through both the central axis of the skeleton body 10 and the axis of the mud channel 11 is defined as the axial reference plane. Because the mud channel 11 is offset relative to the skeleton body 10, the skeleton body 10 forms a large solid area on one side of the mud channel 11, which can be used to house the module mounting slot 12.

[0033] Specifically, the module mounting slot 12 can be configured as one or more. When a module mounting slot 12 is provided, the module mounting slot 12 can be located within the aforementioned physical region and can be symmetrically arranged about the axial reference plane. In this embodiment, as... Figure 3As shown, there are two module mounting slots 12, including a first module mounting slot 120 and a second module mounting slot 121. The first module mounting slot 120 and the second module mounting slot 121 are respectively located on both sides of the axial reference plane, symmetrical about the axial reference plane, and are both separated from the mud channel 11.

[0034] It is understandable that solid walls are retained between the bottom of the first module mounting slot 120 and the mud channel 11, thus isolating the module mounting slot 12 from the mud channel 11. The thickness of the solid walls can be determined based on the pressure-bearing requirements of the frame body 10, the depth of the module mounting slot 12, and the dimensions of the mud channel 11, so as to provide sufficient structural strength around the mud channel 11 while providing space for module installation.

[0035] Therefore, the near-drilling electromagnetic wave receiving module 100 can be arranged in the space formed by the offset setting of the mud channel 11. At the same time, the symmetrical arrangement of the first module mounting slot 120 and the second module mounting slot 121 is also beneficial to improving the mass distribution and bending stress state of the skeleton body 10.

[0036] Furthermore, one or more near-drilling electromagnetic wave receiving modules 100 can be installed in the first module mounting slot 120 and the second module mounting slot 121 according to the module size and electrical connection relationship. For example, the near-drilling electromagnetic wave receiving module 100 may include an RTC battery module, a receiving main control module, and a preamplifier module, etc., and each module can be arranged sequentially along the axial direction D1.

[0037] Optionally, a cover or shield can be provided on the outside of each module. The cover or shield can be detachably connected to the frame body 10 by fasteners such as screws to limit and protect the corresponding module. Different modules can be electrically connected through wiring holes, wiring grooves or sealing pins formed in the frame body 10.

[0038] like Figure 1 As shown, the skeleton body 10 includes a main body 13 and a connecting part 14. The main body 13 has a first end and a second end disposed opposite to each other along an axial direction D1. The connecting part 14 extends outward from the first end of the main body 13 along the axial direction D1, and the outer diameter of the connecting part 14 is smaller than the outer diameter of the main body 13, forming a stepped transition structure between the main body 13 and the connecting part 14. A first sealing component 20 is disposed on the connecting part 14, and a second sealing component 21 is disposed on the second end of the main body 13. The axial end face of the first end of the main body 13 is also provided with a mounting hole, which extends inward from the axial end face of the main body 13, and an exhaust component 30 is disposed in the mounting hole.

[0039] like Figure 3 and Figure 4As shown, both the first sealing assembly 20 and the second sealing assembly 21 include at least one set of sealing units 22, and each sealing unit 22 includes a sealing ring 23 and a retaining ring 24. Specifically, the sealing ring 23 can be an O-ring, and the retaining ring 24 is disposed on one axial side of the corresponding sealing ring 23 and adjacent to the sealing ring 23. The sealing unit 22 of the first sealing assembly 20 is sleeved on the outer periphery of the connecting portion 14, and the sealing unit 22 of the second sealing assembly 21 is disposed at the second end of the main body portion 13.

[0040] Specifically, the second ends of the connecting part 14 and the main body 13 may each be provided with an annular sealing groove, and each sealing unit 22 is installed in the corresponding annular sealing groove. The radial outer side of the sealing ring 23 can form a compression seal with the inner hole 201 wall of the protective drill collar 200. The retaining ring 24 can support the corresponding sealing ring 23 to reduce the risk of the sealing ring 23 being squeezed into the mating gap under the action of pressure difference.

[0041] In this embodiment, the first sealing assembly 20 and the second sealing assembly 21 each include two sets of sealing units 22. The two sets of sealing units 22 in the same sealing assembly are spaced apart along the axial direction D1 to form multiple seals, thereby improving the sealing reliability between the skeleton body 10 and the protective drill collar 200.

[0042] Understandably, after the skeleton body 10 is inserted into the protective drill collar 200, the first sealing component 20 and the second sealing component 21 respectively seal against the inner bore 201 wall of the protective drill collar 200. The outer peripheral surface of the skeleton body 10, the inner bore 201 wall of the protective drill collar 200, and the first sealing component 20 and the second sealing component 21 together define the space to be vented. Since the outer diameter of the connecting portion 14 is smaller than the outer diameter of the main body 13, after the skeleton body 10 is inserted into the protective drill collar 200, an annular gap is formed between the outer peripheral surface of the connecting portion 14 and the inner bore 201 wall of the protective drill collar 200, and this annular gap constitutes at least a part of the space to be vented. During the insertion process of the skeleton body 10, the gas in the space to be vented may be compressed, thereby generating gas pressure that hinders the continued insertion of the skeleton body 10.

[0043] Specifically, see Figure 4 The exhaust assembly 30 includes a piston rod 31 and a clamping nut 32. Both the piston rod 31 and the clamping nut 32 are disposed within a mounting hole, with the clamping nut 32 sleeved on the outside of the piston rod 31 and connected to the wall of the mounting hole. Exemplarily, the clamping nut 32 may be threaded into the mounting hole. The piston rod 31 is movable relative to the clamping nut 32.

[0044] The frame body 10 has an exhaust passage that connects the space to be vented to the mounting hole. When the frame body 10 is not inserted into the predetermined installation position, the gas in the space to be vented can be discharged to the outside through the exhaust passage. Optionally, the exhaust passage can be formed by a channel, gap, or other structure provided on the frame body 10 and / or the piston rod 31.

[0045] In this embodiment, the piston rod 31 is provided with a sealing structure for closing the exhaust passage. When the skeleton body 10 is not inserted into the predetermined installation position, the exhaust passage remains open; when the skeleton body 10 is inserted into the predetermined installation position, the piston rod 31 is pressed and moved, thereby closing the exhaust passage. The predetermined installation position refers to the skeleton body 10 moving along the inner hole 201 of the protective drill collar 200 to the designed installation position. In this embodiment, the piston rod 31 can be pressed by an adjacent component that mates with the connecting part 14; in other embodiments, it can also be pressed by a stepped structure or other triggering structure within the protective drill collar 200.

[0046] Optionally, the piston rod 31 can be equipped with an elastic reset structure so that after the resistance force acting on the piston rod 31 is released, the piston rod 31 can return to the position that opens the exhaust passage. The clamping nut 32 can be used to install and limit the piston rod 31. When it is necessary to disassemble the frame body 10, as the frame body 10 leaves the predetermined installation position, the resistance force acting on the piston rod 31 is released, and the piston rod 31 can return to its original position under the action of the elastic reset structure, thus reopening the exhaust passage. In this way, the space to be vented can be reconnected with the outside world to balance the gas pressure inside and outside the space to be vented during the disassembly process.

[0047] Furthermore, such as Figure 1 As shown, the skeleton body 10 also includes a first wear-resistant ring 40 and a second wear-resistant ring 41. The first wear-resistant ring 40 is sleeved on the outer periphery of the connecting portion 14, and the first sealing component 20 is located on the side of the first wear-resistant ring 40 closer to the main body portion 13; the second wear-resistant ring 41 is disposed at the second end of the main body portion 13, and the second sealing component 21 is located on the side of the second wear-resistant ring 41 closer to the first end. Thus, the first wear-resistant ring 40 and the second wear-resistant ring 41 are respectively located at positions closer to the axial ends of the corresponding sealing components of the skeleton body 10.

[0048] The first wear-resistant ring 40 and the second wear-resistant ring 41 can guide, straighten and protect against wear during the process of inserting the skeleton body 10 into the protective drill collar 200, and reduce the risk of the outer metal peripheral surface of the skeleton body 10 and the adjacent sealing area being scratched by the inner wall of the protective drill collar 200.

[0049] Furthermore, such as Figure 4As shown, the skeleton body 10 is also provided with a third wear-resistant ring 42. The third wear-resistant ring 42 is disposed on the axial end face of the first end of the main body 13 and sleeved on the outer periphery of the connecting part 14 to form a wear-resistant and straightening structure in the transition area between the main body 13 and the connecting part 14.

[0050] The first wear-resistant ring 40, the second wear-resistant ring 41, and the third wear-resistant ring 42 are distributed along the axial direction D1 of the skeleton body 10, enabling the skeleton body 10 to provide support to the protective drill collar 200 at multiple axial positions. Therefore, even when the skeleton body 10 is long, the risk of the skeleton body 10 deviating during insertion or downhole vibration, causing direct contact between local metal surfaces and the inner wall of the protective drill collar 200, can be reduced.

[0051] Optionally, the first wear-resistant ring 40, the second wear-resistant ring 41, and the third wear-resistant ring 42 can all be made of PEEK material and can be installed on the skeleton body 10 by heat fitting. The radial outer edge of each wear-resistant ring can protrude moderately relative to the adjacent metal outer peripheral surface, so that each wear-resistant ring preferentially contacts the inner wall of the protective drill collar 200, thereby reducing direct metal-to-metal friction between the skeleton body 10 and the protective drill collar 200.

[0052] Optionally, such as Figure 4 As shown, the skeleton body 10 may also be equipped with an anode ring 43, a positioning ring 44, and a grounding spring 45. The anode ring 43 is located at the end of the skeleton body 10 near the second wear-resistant ring 41 to reduce the risk of electrochemical corrosion of the skeleton body 10 in the downhole environment. The positioning ring 44 and the grounding spring 45 are located at the end of the skeleton body 10 near the first wear-resistant ring 40, respectively for auxiliary positioning and grounding connection. Furthermore, a support ring 46 may be provided near the third wear-resistant ring 42 to provide elastic support for the corresponding parts.

[0053] like Figure 1 and Figure 3 As shown, the axial end face of the first end of the main body 13 is also provided with a positioning hole 15 and a single-core insertion hole 16. The positioning hole 15, the single-core insertion hole 16, and the mounting hole for installing the exhaust assembly 30 are provided at intervals along the circumferential direction D3 around the connecting part 14 on the axial end face of the first end of the main body 13.

[0054] During installation, the circumferential position of the frame body 10 can be defined first by the cooperation of the positioning hole 15 and the positioning pin. Then, the frame body 10 is pushed along the axial direction D1 so that the single-core insertion hole 16 is inserted into the corresponding electrical connection structure, and the exhaust assembly 30 is pressed by the corresponding structure when it reaches the predetermined installation position. Thus, positioning, electrical connection, and triggering of the exhaust assembly 30 can be completed sequentially during the same insertion process of the frame body 10.

[0055] Furthermore, a communication connector 50 is provided at the second end of the main body 13, serving as an electrical connection interface at the other end of the skeleton body 10. One or more near-drilling electromagnetic wave receiving modules 100 can be installed in the first module mounting slot 120 and / or the second module mounting slot 121. The single-core jack 16 and the communication connector 50 are respectively electrically connected to at least one near-drilling electromagnetic wave receiving module 100, and the near-drilling electromagnetic wave receiving modules 100 can be electrically connected to each other to realize the transmission of electrical signals and / or electrical energy between the near-drilling electromagnetic wave receiving modules 100 and external devices at both ends of the skeleton body 10.

[0056] In this embodiment, the communication connector 50 may be a multi-core connector, a bus connector, or other electrical connection structures suitable for downhole instruments.

[0057] During operation, the skeleton body 10 is gradually inserted along the inner hole 201 of the protective drill collar 200. After the first sealing assembly 20 and the second sealing assembly 21 respectively form a seal with the inner hole 201 of the protective drill collar 200, the gas in the exhaust space is compressed during the subsequent insertion process and discharged to the outside through the exhaust assembly 30 to reduce the insertion resistance generated by gas compression.

[0058] As the frame body 10 continues to move to the predetermined installation position, the piston rod 31 is pressed and moves, causing the exhaust assembly 30 to cut off the connection between the space to be vented and the outside. At the same time, the positioning hole 15 defines the circumferential installation position of the frame body 10, so that the single-core socket 16 can mate with the corresponding electrical connection structure.

[0059] After installation, the first sealing assembly 20 and the second sealing assembly 21 maintain the seal between the skeleton body 10 and the protective drill collar 200, respectively. The first wear-resistant ring 40, the second wear-resistant ring 41, and the third wear-resistant ring 42 guide, straighten, and provide wear-resistant protection for the skeleton body 10. The drilling mud passes through the mud channel 11 along the axial direction D1, and the near-drilling electromagnetic wave receiving module 100 is electrically connected to adjacent equipment through the single-core socket 16 and the communication connector 50.

[0060] In summary, the near-drilling electromagnetic wave receiving module carrier assembly provided in this embodiment, by setting an offset mud channel 11 in the skeleton body 10 and setting a module mounting groove 12 on the outer periphery of the skeleton body 10, can take into account both mud flow and installation requirements of the near-drilling electromagnetic wave receiving module 100 within a limited radial space. At the same time, the first sealing component 20 and the second sealing component 21 form a space to be vented between the skeleton body 10 and the protective drill collar 200, and the venting component 30 is used to vent the gas in the space to be vented during the insertion process and cut off the connection between the space to be vented and the outside when the skeleton body 10 is inserted to the predetermined installation position, thereby reducing the air resistance during the insertion process and taking into account the sealing requirements after insertion to the predetermined installation position.

[0061] like Figure 5 and Figure 6 As shown, this embodiment also provides a protective drill collar assembly, including a protective drill collar 200 and the aforementioned near-drilling electromagnetic wave receiving module carrier assembly. The protective drill collar 200 has an inner hole 201 extending axially along D1, and the skeleton body 10 is inserted into this inner hole 201. A first sealing component 20 and a second sealing component 21 respectively seal against the hole wall of the inner hole 201, creating a venting space in the outer periphery gap of the skeleton between the first sealing component 20 and the second sealing component 21. Drilling mud can pass through the mud channel 11 inside the skeleton body 10, and the near-drilling electromagnetic wave receiving module 100 is installed in the module mounting groove 12 formed on the outer periphery of the skeleton body 10.

[0062] Therefore, in this embodiment, by inserting the near-drilling electromagnetic wave receiving module carrier assembly into the protective drill collar 200, and utilizing the mud channel 11 inside the skeleton body 10 and the module mounting groove 12 on the outer periphery to respectively undertake the functions of mud flow and installation of the near-drilling electromagnetic wave receiving module 100, the integrated arrangement of mud flow and near-drilling electromagnetic wave receiving module 100 can be achieved within the limited radial space of the protective drill collar 200.

[0063] It is understood that in this invention, when the number of components or members is not specifically limited, the number can be one or more, where multiple refers to two or more. For cases where the number of components or members shown in the drawings and / or described in the specification is, for example, two, three, four, etc., this specific number is generally exemplary and not limiting, and can be understood as multiple, i.e., two or more; however, this does not mean that the invention excludes the case of one.

[0064] It should be understood that the above-described embodiments, examples, or examples are merely exemplary and are not intended to limit the present invention. Those skilled in the art can make various modifications and changes to the above-described embodiments, examples, or examples under the guidance of the present invention, without departing from the scope of the present invention.

Claims

1. A near-drilling electromagnetic wave receiving module carrier assembly, characterized in that, include: The skeleton body (10) is provided with a mud channel (11) that runs through along the axial direction (D1). The axis of the mud channel (11) is offset relative to the central axis of the skeleton body (10). The outer peripheral surface of the skeleton body (10) is recessed inward to form at least one module mounting groove (12) that extends along the axial direction (D1). The module mounting groove (12) is used to install a near-drilling electromagnetic wave receiving module (100). The first sealing component (20) and the second sealing component (21) are respectively disposed at both ends of the skeleton body (10). The first sealing component (20) and the second sealing component (21) are used to seal with the inner wall of the protective drill collar (200) when the skeleton body (10) is inserted into the protective drill collar (200). The outer peripheral surface of the skeleton body (10), the inner wall of the protective drill collar (200), the first sealing component (20) and the second sealing component (21) together define the space to be vented. An exhaust assembly (30) is disposed on the frame body (10) and communicates with the space to be vented. Before the frame body (10) is inserted into the predetermined installation position, the exhaust assembly (30) connects the space to be vented with the outside. When the frame body (10) is inserted into the predetermined installation position, the exhaust assembly (30) is pressed and cuts off the communication between the space to be vented and the outside.

2. The near-drilling electromagnetic wave receiving module carrier assembly according to claim 1, characterized in that, The skeleton body (10) includes a main body (13) and a connecting part (14). The main body (13) has a first end and a second end that are disposed opposite to each other along the axial direction (D1). The connecting part (14) extends outward from the first end along the axial direction (D1), and the outer diameter of the connecting part (14) is smaller than the outer diameter of the main body (13). The first sealing component (20) is disposed on the connecting part (14), the second sealing component (21) is disposed on the second end, the axial end face of the first end is provided with a mounting hole, and the exhaust component (30) is disposed in the mounting hole.

3. The near-drilling electromagnetic wave receiving module carrier assembly according to claim 2, characterized in that, The exhaust assembly (30) includes a piston rod (31) and a clamping nut (32). Both the piston rod (31) and the clamping nut (32) are disposed in the mounting hole. The clamping nut (32) is sleeved on the outside of the piston rod (31) and connected to the hole wall of the mounting hole. The piston rod (31) is movable relative to the clamping nut (32).

4. The near-drilling electromagnetic wave receiving module carrier assembly according to any one of claims 1 to 3, characterized in that, The module mounting slot (12) includes a first module mounting slot (120) and a second module mounting slot (121). The plane passing through the central axis of the skeleton body (10) and the axis of the mud channel (11) is defined as the axial reference plane. The first module mounting slot (120) and the second module mounting slot (121) are respectively set on both sides of the axial reference plane and are symmetrically set about the axial reference plane.

5. The near-drilling electromagnetic wave receiving module carrier assembly according to any one of claims 1 to 3, characterized in that, The first sealing assembly (20) and the second sealing assembly (21) each include at least one set of sealing units (22), each sealing unit (22) includes a sealing ring (23) and a retaining ring (24), the sealing ring (23) and the retaining ring (24) are both sleeved on the outer periphery of the skeleton body (10), and the retaining ring (24) is located on the axial side of the corresponding sealing ring (23) and is adjacent to the sealing ring (23).

6. The near-drilling electromagnetic wave receiving module carrier assembly according to claim 2, characterized in that, The skeleton body (10) is also provided with a first wear-resistant ring (40) and a second wear-resistant ring (41). The first wear-resistant ring (40) is sleeved on the outer periphery of the connecting part (14), and the first sealing component (20) is located on the side of the first wear-resistant ring (40) close to the main body (13). The second wear-resistant ring (41) is disposed at the second end, and the second sealing component (21) is located on the side of the second wear-resistant ring (41) close to the first end.

7. The near-drilling electromagnetic wave receiving module carrier assembly according to claim 6, characterized in that, The skeleton body (10) is also provided with a third wear-resistant ring (42), which is disposed on the axial end face of the first end and sleeved on the outer periphery of the connecting part (14).

8. The near-drilling electromagnetic wave receiving module carrier assembly according to claim 2, characterized in that, The axial end face of the first end is also provided with a positioning hole (15) and a single core insertion hole (16). The positioning hole (15) is used to define the circumferential installation position of the skeleton body (10), and the single core insertion hole (16) is used for electrical connection. The positioning hole (15), the single core insertion hole (16) and the mounting hole are arranged circumferentially (D3) around the connecting part (14) on the axial end face of the first end.

9. The near-drilling electromagnetic wave receiving module carrier assembly according to claim 8, characterized in that, The second end is provided with a communication connector (50), and one or more of the near-drilling electromagnetic wave receiving modules (100) are installed in the module mounting slot (12). The single-core socket (16) and the communication connector (50) are electrically connected to at least one of the near-drilling electromagnetic wave receiving modules (100).

10. A drill collar protection assembly, characterized in that, The invention includes a protective drill collar (200) and a near-drilling electromagnetic wave receiving module carrier assembly according to any one of claims 1 to 9, wherein the protective drill collar (200) has an inner hole (201) extending along the axial direction (D1), the near-drilling electromagnetic wave receiving module carrier assembly is inserted into the inner hole (201), and the first sealing assembly (20) and the second sealing assembly (21) respectively seal against the borehole wall of the inner hole (201).

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