A rotary steering device for zero blind area geological parameter measurement

Abstract

This application provides a rotary steering device for zero-blind-zone geological parameter measurement, relating to the field of engineering drilling technology. It includes a connecting section, an upper spindle, a lower spindle, and a drill bit connected in sequence. The connecting section houses a power supply and communication module. The upper spindle has a bushing with a rotary steering module mounted on it, and the lower spindle houses an azimuth gamma geological steering module. It also includes two transmission mechanisms. The first transmission mechanism comprises a first part and a second part, which generate an excitation magnetic field to electrically connect the power supply and communication module to the rotary steering module. The second transmission mechanism comprises a third part and a fourth part, which abut against each other to electrically connect the power supply and communication module to the azimuth gamma geological steering module. By using the second transmission mechanism to power and communicate with the azimuth gamma geological steering module, and using the first transmission mechanism to power and communicate with the rotary steering module, near-drill bit measurement capabilities are integrated into the rotary steering system, achieving closed-loop steering control, improving drilling accuracy, and ensuring wellbore trajectory quality.

Description

Technical Field

[0001] This application relates to the field of engineering drilling technology, and in particular to a rotary guide device for measuring geological parameters with zero blind zone. Background Technology

[0002] The needs of exploration and development are driving the evolution and development of well types. Wells with complex structures, such as extended reach wells, ultra-thin oil layer horizontal wells, and multi-branch wells, are playing an increasingly important role in oil and gas field exploration and development. Rotary steerable drilling technology is a high-tech drilling technology that emerged to meet the needs of drilling these complex well structures, and it is a key research focus and development direction in modern steerable drilling. Rotary steerable drilling technology allows for control of the wellbore trajectory during drill string rotation. When using rotary steerable drilling technology, three-dimensional wellbore trajectory control can be achieved without frequent tripping in and out of the drill string. It also offers advantages such as smoother wellbore trajectories and greater extension distances, which is of great significance for ensuring wellbore trajectory quality, improving drilling speed and efficiency, and meeting the needs of drilling complex well structures.

[0003] Near-bit geosteering (MWD) technology is a geosteering drilling technology that has developed in recent years. It is an integrated measurement and control technology that combines directional measurement, steering tools, formation parameter measurement, and real-time interpretation while drilling. Its key feature is the integration of drilling, logging, and reservoir engineering technologies. This technology measures geological parameters using gamma sensors, transmits them to the MWD system, encodes them, and uploads them to the surface for real-time steering control. However, steering control still relies on screw-based orientation, requires sliding drilling, resulting in low efficiency, large wellbore doglegs, and an uneven wellbore.

[0004] In summary, combining rotary steerable drilling technology with near-bit geosteering technology, and utilizing the measurement capabilities of near-bit geosteering as the control basis for rotary steerable technology, allows for adjustments to the rotary steerable system based on real-time formation parameters, ensuring wellbore trajectory quality. Existing rotary steerable devices lack near-bit geosteering measurement capabilities, preventing steerable decisions from being generated based on real-time formation information at the drill bit. This results in low drilling success rates in complex reservoirs and necessitates frequent tripping and trajectory adjustments. Therefore, there is an urgent need for a rotary steerable device with its own geosteering measurement capabilities, capable of acquiring real-time formation gamma parameters behind the drill bit during full rotary drilling, and using this as a basis for closed-loop steerable control. Summary of the Invention

[0005] The purpose of this application is to address the above problems by providing a rotary guide device for zero-blind-zone geological parameter measurement, comprising: A connecting section, wherein a power supply and communication module is provided; The upper spindle has a first end connected to the connecting section, and a bushing is fitted on the upper spindle, with a rotary guide module provided on the bushing. A first transmission mechanism, comprising a first part and a second part, wherein the first part is disposed on the outer peripheral surface of the upper spindle and electrically connected to the power supply and communication module, and the second part is disposed on the inner peripheral surface of the bushing and electrically connected to the rotary guide module, wherein an excitation magnetic field is provided between the first part and the second part, so that the power supply and communication module and the rotary guide module transmit electrical energy and signals through the first part and the second part; The lower spindle has a first end connected to the second end of the upper spindle, and the second end of the lower spindle is connected to a drill bit. The lower spindle is equipped with an azimuth gamma geological guidance module, which is used to measure the gamma parameters of the formation at the rear end of the drill bit in real time. The second transmission mechanism includes a third part and a fourth part. The third part is located at the second end of the upper main shaft and is electrically connected to the power supply and communication module. The fourth part is located at the first end of the lower main shaft and is electrically connected to the azimuth gamma geological guidance module. When the upper main shaft is connected to the lower main shaft, the third part and the fourth part abut against each other and conduct.

[0006] According to the technical solutions provided in certain embodiments of this application, there is a first gap between the first part and the second part, and the projections of the first part and the second part along the radial direction of the upper main axis overlap.

[0007] According to the technical solutions provided in certain embodiments of this application, the third part has a first annular surface and the fourth part has a second annular surface. When the upper spindle is connected to the lower spindle, the first annular surface and the second annular surface are in contact with each other.

[0008] According to the technical solutions provided in certain embodiments of this application, the power supply and communication module is electrically connected to the first part via a first wire, and is also electrically connected to the third part via a second wire; The upper spindle has a first channel and a second channel respectively opened on its shaft wall along its axial direction. The first channel and the second channel are symmetrically arranged with respect to the central axis of the upper spindle. The first wire passes through the first channel and the second wire passes through the second channel.

[0009] According to the technical solutions provided in certain embodiments of this application, the first part includes a first soft magnet and a first winding wound on the first soft magnet, the second part includes a second soft magnet and a second winding wound on the second soft magnet, and the power supply and communication module is electrically connected to the first winding to provide high-frequency AC power to the first winding so as to power the rotary guide module through the excitation magnetic field generated between the first part and the second part, and to realize signal transmission between the power supply and communication module and the rotary guide module through the excitation magnetic field generated between the first part and the second part.

[0010] According to the technical solutions provided in certain embodiments of this application, the first bearing and the second bearing are further included. The first bearing and the second bearing are distributed along the axial direction of the upper main shaft. The inner ring of the first bearing is fixed to the upper main shaft, the inner ring of the second bearing is fixed to the lower main shaft, and the outer rings of the first bearing and the second bearing are respectively fixed to the bushing.

[0011] According to the technical solutions provided in certain embodiments of this application, the azimuth gamma geological guidance module includes: A gamma sensor, used to detect gamma rays in the formation at the rear end of the drill bit; A gamma circuit unit, which is electrically connected to the gamma sensor, is used to amplify, filter, and shape the detection signal corresponding to the gamma ray. The processing unit is electrically connected to the gamma circuit unit and the fourth part, respectively, and is used to process the detection signal and transmit it to the power supply and communication module through the third part and the fourth part.

[0012] According to the technical solutions provided in certain embodiments of this application, the rotary guide module includes: A main control unit, which is electrically connected to the second part, is used to receive guidance instructions; The hydraulic control unit is electrically connected to the main control unit. Three rib actuators are evenly distributed along the circumference of the bushing. The hydraulic control unit is used to drive the rib actuators under the control of the main control unit. The inclination measurement unit is electrically connected to the main control unit. The inclination measurement unit is used to measure the downhole attitude of the rotary steering device and transmit the attitude data to the main control unit.

[0013] According to the technical solutions provided in certain embodiments of this application, the power supply and communication module includes: A power supply and communication circuit, which is electrically connected to the third part, is used to receive the detection signal from the azimuth gamma geological guidance module; The resolver circuit is electrically connected to the power supply and communication circuit and the first part, respectively. The power supply and communication circuit is used to supply power to the resolver circuit, and the resolver circuit is used to transmit guidance commands to the rotary guide module and receive attitude data.

[0014] Compared with the prior art, the beneficial effects of this application are as follows: This application provides a rotary guide device for zero-blind-zone geological parameter measurement, including a connecting section, an upper spindle, a lower spindle, and a drill bit connected in sequence. A power supply and communication module is provided within the connecting section. A bushing is fitted on the upper spindle, and a rotary guide module is mounted on the bushing. An azimuth gamma geological guide module is provided within the lower spindle. The azimuth gamma geological guide module is used to measure the gamma parameters of the formation at the rear end of the drill bit in real time. It also includes a first transmission mechanism and a second transmission mechanism. The first transmission mechanism includes a first part and a second part. The first part is located on the outer circumferential surface of the upper spindle and is electrically connected to the power supply and communication module. The second part is located on the inner circumferential surface of the bushing and is electrically connected to the rotary guide module. An excitation magnetic field exists between the first part and the second part, enabling the power supply and communication module and the rotary guide module to transmit electrical energy and signals through the first part and the second part. The second transmission mechanism includes a third part and a fourth part. The third part is located on the upper spindle... The second end is electrically connected to the power supply and communication module, and the fourth part is located at the first end of the lower main shaft and electrically connected to the azimuth gamma geological steering module. When the upper and lower main shafts are connected, the third and fourth parts abut against each other and conduct electricity. By setting up a second transmission mechanism, the abutting third and fourth parts provide power and communication to the azimuth gamma geological steering module that follows the drill bit rotation, enabling the rotary steering device to obtain the formation gamma parameters behind the drill bit in real time during full rotary drilling. By setting up a first transmission mechanism, the relatively rotatable first and second parts provide power and communication to the rotary steering module, enabling the rotary steering device to autonomously adjust the steering commands according to the real-time measured geological information. The near-drill bit measurement capability is built into the rotary steering system, forming a rotary steering device with geological sensing capability. This realizes closed-loop steering control of real-time formation parameters, improving the drilling rate of complex reservoirs while ensuring wellbore trajectory quality and drilling efficiency.

[0015] It should be understood that the descriptions of technical features, technical solutions, beneficial effects, or similar language in this application do not imply that all features and advantages can be achieved in any single embodiment. Rather, it is understood that the description of a feature or beneficial effect means that a specific technical feature, technical solution, or beneficial effect is included in at least one embodiment. Therefore, the descriptions of technical features, technical solutions, or beneficial effects in this specification do not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions, and beneficial effects described in this embodiment can be combined in any suitable manner. Those skilled in the art will understand that embodiments can be implemented without one or more specific technical features, technical solutions, or beneficial effects of a particular embodiment. In other embodiments, additional technical features and beneficial effects may be identified in specific embodiments that do not embody all embodiments. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic axial cross-sectional view of a rotary guide device for zero-blind-zone geological parameter measurement provided in this application embodiment; Figure 2 for Figure 1 Enlarged view of section A; Figure 3 for Figure 1 Enlarged view of section B; Figure 4 This is a schematic diagram of the rotary guide module of a rotary guide device for measuring geological parameters with zero blind spots, provided in an embodiment of this application.

[0018] The text labels in the image represent: 1. Power supply and communication module; 2. Azimuth gamma geological guidance module; 3. Rotary guidance module; 4. First part; 5. Second part; 6. Third part; 7. Fourth part; 8. First bearing; 9. Second bearing; 11. Resolver circuit; 12. Power supply and communication circuit; 21. Gamma sensor; 22. Gamma circuit unit; 31. Main control unit; 32. Inclinometer unit; 33. Hydraulic control unit; 100. Connecting section; 200. Upper spindle; 300. Lower spindle; 400. Bushing; 500. Drill bit; 600. Rib actuator. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The descriptions in this section are merely illustrative and explanatory, and should not be construed as limiting the scope of protection of this application. Specifically, the described embodiments are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort should fall within the scope of protection of this application.

[0020] It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or apparatus.

[0021] As mentioned in the background section, to address the problems existing in the prior art, this embodiment provides a rotary guide device for zero-blind-zone geological parameter measurement, comprising: Connection section 100, the connection section 100 is equipped with a power supply and communication module 1; The upper spindle 200 has its first end connected to the connecting section 100. A bushing 400 is fitted on the upper spindle 200, and a rotary guide module 3 is provided on the bushing 400. The first transmission mechanism includes a first part 4 and a second part 5. The first part 4 is disposed on the outer peripheral surface of the upper main shaft 200 and is electrically connected to the power supply and communication module 1. The second part 5 is disposed on the inner peripheral surface of the bushing 400 and is electrically connected to the rotary guide module 3. There is an excitation magnetic field between the first part 4 and the second part 5 so that the power supply and communication module 1 and the rotary guide module 3 can transmit electrical energy and signals through the first part 4 and the second part 5. The lower spindle 300 has its first end connected to the second end of the upper spindle 200. The second end of the lower spindle 300 is connected to the drill bit 500. The lower spindle 300 is equipped with an azimuth gamma geological guidance module 2, which is used to measure the gamma parameters of the formation behind the drill bit 500 in real time. The second transmission mechanism includes a third part 6 and a fourth part 7. The third part 6 is located at the second end of the upper spindle 200 and is electrically connected to the power supply and communication module 1. The fourth part 7 is located at the first end of the lower spindle 300 and is electrically connected to the azimuth gamma geological guidance module 2. When the upper spindle 200 and the lower spindle 300 are connected, the third part 6 and the fourth part 7 abut against each other and conduct.

[0022] like Figure 1-3 As shown, the rotary guide device is the end part of the entire drill string structure. One end of it is connected to the ground drilling rig via a drive shaft, universal joint, and screw. The ground drilling rig is equipped with a top drive device, which drives the rotary guide device to rotate around its own axis for drilling operations. The first end of the connecting section 100 is connected to the top drive device via a drive shaft and other structures. It contains an electronic compartment housing a power supply and communication module 1. This module 1 communicates with the ground controller of the ground drilling rig to transmit signals and receive commands from the ground controller. A generator is typically installed within the column structure, located in the screw section, to provide power to the power supply and communication module 1. The first end of the upper spindle 200 is threadedly connected to the second end of the connecting section 100. The electronic compartment is fixed to the upper spindle 200 by screws. The upper spindle 200 is a hollow structure with internal channels for drilling fluid or mud. The first end of the lower spindle 300 is threadedly connected to the second end of the upper spindle 200. The second end of the lower spindle 300 is connected to the drill bit 500. The lower spindle 300 also has internal channels for drilling fluid or mud, allowing the mud pump of the surface drilling rig to pump out... High-pressure liquid can pass through the upper spindle 200 and the lower spindle 300 and then be discharged from the drill bit 500. A bushing 400 is fitted onto the upper spindle 200 and can rotate relative to it. A rotary guide module 3 is provided on the bushing 400. A first transmission mechanism is located between the upper spindle 200 and the bushing 400. A first part 4 is located on the outer circumferential surface of the upper spindle 200 and is electrically connected to the power supply and communication module 1. A second part 5 is located on the inner circumferential surface of the bushing 400 and is electrically connected to the rotary guide module 3. The first part 4 and the second part 5 can rotate relative to each other. The power supply and communication module 1 can provide high-pressure liquid to the first part 4. A frequency AC power supply generates an excitation magnetic field, enabling the power supply and communication module 1 and the rotary guide module 3 to transmit electrical energy and signals through the excitation magnetic field. An azimuth gamma geological guidance module 2 is installed inside the lower main shaft 300. A second transmission mechanism is installed between the upper main shaft 200 and the lower main shaft 300. A third part 6 is located at the second end of the upper main shaft 200 and is electrically connected to the power supply and communication module 1. A fourth part 7 is located at the first end of the lower main shaft 300 and is electrically connected to the azimuth gamma geological guidance module 2. The two parts abut against each other to enable the power supply and communication module 1 and the azimuth gamma geological guidance module 2 to transmit electrical energy and signals.

[0023] By setting up a second transmission mechanism, the third part 6 and the fourth part 7, which abut against each other, provide power and communication to the azimuth gamma geological steering module 2 that follows the drill bit's rotation. This enables the rotary steering device to acquire the formation gamma parameters 500 degrees behind the drill bit in real time during full rotary drilling. By setting up a first transmission mechanism, the first part 4 and the second part 5, which can rotate relative to each other, provide power and communication to the rotary steering module 3. This enables the rotary steering device to autonomously adjust its steering commands based on the real-time geological information measured. The near-drill bit measurement capability is built into the rotary steering system, forming a rotary steering device with geological sensing capabilities. This achieves closed-loop steering control based on real-time formation parameters, improving the drilling rate of complex reservoirs while ensuring wellbore trajectory quality and drilling efficiency.

[0024] In a preferred embodiment, a first gap is provided between the first part 4 and the second part 5, and the projections of the first part 4 and the second part 5 overlap along the radial direction of the upper main axis 200.

[0025] Furthermore, the first part 4 includes a first soft magnet and a first winding wound on the first soft magnet, and the second part 5 includes a second soft magnet and a second winding wound on the second soft magnet. The power supply and communication module 1 is electrically connected to the first winding and is used to provide high-frequency AC power to the first winding so as to power the rotary guide module 3 through the excitation magnetic field generated between the first part 4 and the second part 5, and to realize signal transmission between the power supply and communication module 1 and the rotary guide module 3 through the excitation magnetic field generated between the first part 4 and the second part 5.

[0026] Specifically, both the first part 4 and the second part 5 are approximately ring-shaped structures. The first part 4 is fixedly mounted on the outer circumferential surface of the upper main shaft 200 and can rotate with the upper main shaft 200. The second part 5 is fixedly mounted on the inner circumferential surface of the bushing 400. The projections of the first part 4 and the second part 5 in the radial direction of the upper main shaft 200 coincide and have a constant first gap, forming a relative positional relationship of "inner ring and outer ring". When the power supply and communication module 1 provides high-frequency AC power to the first winding, an excitation magnetic field is generated in the first soft magnet. The excitation magnetic field is coupled to the second soft magnet through the first gap, and in the second... A current is induced in the winding, thereby powering the rotary guide module 3 between the upper main shaft 200 and the bushing 400, which can rotate relative to each other. The guide command issued by the power supply and communication module 1 is modulated and coupled, and then transmitted to the rotary guide module 3 through the excitation magnetic field between the first part 4 and the second part 5. The rotary guide module 3 demodulates and executes the command. At the same time, the rotary guide module 3 transmits the measured attitude data by modulating the reflection impedance. The power supply and communication module 1 demodulates and receives the data by detecting changes in the electrical parameters of the first winding, thereby realizing the signal transmission between the power supply and communication module 1 and the rotary guide module 3.

[0027] In a preferred embodiment, the third part 6 has a first annular surface and the fourth part 7 has a second annular surface. When the upper spindle 200 is connected to the lower spindle 300, the first annular surface and the second annular surface fit together.

[0028] like Figure 3 As shown, the third part 6 and the fourth part 7 have the same structure, both being annular conductive structures. The third part 6 is embedded on the end face of the second end of the upper spindle 200, and the fourth part 7 is embedded on the end face of the first end of the lower spindle 300, corresponding to the third part 6. When the upper spindle 200 and the lower spindle 300 are threadedly connected, the third part 6 and the fourth part 7 abut against each other, and the first annular surface and the second annular surface fit together, thereby enabling power supply to the azimuth gamma geological guidance module 2 and signal transmission between the power supply communication module 1 and the azimuth gamma geological guidance module 2. By designing the second transmission mechanism as a split structure and using end face contact for power and signal transmission, it is convenient to coordinate with the sealing structure for design, ensuring... The sealing of the space where the obstacle orientation gamma geological guidance module 2 is located ensures that the electrical connection between the third part 6 and the fourth part 7 can be disconnected without damage when replacement or disassembly is required. Moreover, the end-face contact method can form a stable static physical connection. Compared with the traditional connection method, it is more suitable for environments where the upper and lower main shafts 300 need to withstand torque and axial pressure. It should be noted that in this application, insulation isolation measures are set in the existing technology between the connecting section 100, the upper main shaft 200, the lower main shaft 300 and their respective "conductive structures", such as applying insulating coatings, adding insulating washers, and using insulating sleeves. These are technical means well known to those skilled in the art and will not be described in detail here.

[0029] Furthermore, the power supply and communication module 1 is electrically connected to the third part 6 via the first wire, and is also electrically connected to the first part 4 via the second wire; The upper spindle 200 has a first channel and a second channel respectively opened on its shaft wall along its axial direction. The first channel and the second channel are symmetrically arranged with respect to the central axis of the upper spindle 200. The first wire passes through the first channel and the second wire passes through the second channel.

[0030] Specifically, one end of the first wire is connected to the power supply and communication module 1, and the other end passes through the first channel on the shaft wall of the upper main shaft 200 and connects to the third part 6. One end of the second wire is connected to the power supply and communication module 1, and the other end passes through the second channel on the shaft wall of the upper main shaft 200 and connects to the first part 4. The first wire is used to transmit electrical energy and signals between the power supply and communication module 1 and the azimuth gamma geological guidance module 2, and the second wire is used to transmit electrical energy and signals between the power supply and communication module 1 and the rotary guidance module 3. The two channels are independent of each other and together ensure that electrical energy and signals can be transmitted stably and reliably inside the upper main shaft 200.

[0031] In a preferred embodiment, the power supply and communication module 1 includes: Power supply and communication circuit 12 is electrically connected to the third part 6 and is used to receive the detection signal of the azimuth gamma geological guidance module 2. The resolver circuit 11 is electrically connected to the power supply and communication circuit 12 and the first part 4, respectively. The power supply and communication circuit 12 is used to supply power to the resolver circuit 11, and the resolver circuit 11 is used to transmit guidance commands to the rotation guide module 3 and receive attitude data.

[0032] like Figure 1 As shown, the power supply and communication module 1 is located inside the electronic compartment and includes a resolver circuit 11 and a power supply and communication circuit 12. The power supply and communication circuit 12 is electrically connected to the third part 6. The power supply and communication circuit 12 is used to receive electrical energy from the generator and power the resolver circuit 11. At the same time, it powers the azimuth gamma geological guidance module 2 through the second wire, the third part 6 and the fourth part 7, and receives the detection signal returned by the azimuth gamma geological guidance module 2. The resolver circuit 11 is electrically connected to the first part 4 through the first wire and is used to generate high-frequency AC power. It provides non-contact power to the rotary guidance module 3 through the excitation magnetic field between the first part 4 and the second part 5. The guidance command is also encoded, modulated and coupled into the excitation magnetic field by the resolver circuit 11 and sent to the rotary guidance module 3 through the excitation magnetic field. At the same time, it receives the attitude data returned by the rotary guidance module 3.

[0033] In a preferred embodiment, the lower spindle 300 includes: The outer body is fixed to the second end of the upper spindle 200; An electronic sleeve is fixed inside the outer body and forms a first cavity with the outer body. An azimuth gamma geological guidance module 2 is provided inside the first cavity. A fourth part 7 is embedded at one end of the electronic sleeve near the upper main shaft 200. A third part 6 is embedded at the second end of the upper main shaft 200 corresponding to the fourth part 7. The third part 6 abuts against the fourth part 7 so that the first annular surface and the second annular surface fit together.

[0034] Specifically, the upper spindle 200 near the lower spindle 300 has a connecting structure fixed by rollers. The connecting structure is threaded to the outer body of the lower spindle 300. The electronic sleeve is fixed inside the outer body. The electronic sleeve has a channel for drilling fluid or mud to pass through. The electronic sleeve abuts against the end of the upper spindle 200. The outer body and the electronic sleeve together form a first cavity. A sealing structure is provided at both ends of the first cavity to prevent drilling fluid or mud from entering the first cavity. The third part 6 is embedded on the end face of the upper spindle 200. The fourth part 7 is embedded on the end face of the electronic sleeve, corresponding to the third part 6. It is electrically connected to the azimuth gamma geological guidance module 2 in the first cavity through a lead wire. A sealing structure is also provided between the electronic sleeve and the upper spindle 200 to prevent drilling fluid or mud from affecting the electrical connection between the third part 6 and the fourth part 7.

[0035] In a preferred embodiment, the azimuth gamma geological guidance module 2 includes: Gamma sensor 21 is used to detect gamma rays in the formation behind the drill bit 500. Gamma circuit unit 22 is electrically connected to gamma sensor 21 and is used to amplify, filter and shape the detection signal corresponding to gamma rays. The processing unit is electrically connected to the gamma circuit unit 22 and the fourth part 7, respectively, and is used to process the detection signal and transmit it to the power supply and communication module 1 through the third part 6 and the fourth part 7.

[0036] like Figure 1 As shown, the gamma sensor 21, gamma circuit unit 22, and processing unit are all located in the first cavity. The gamma sensor 21 is used to detect gamma rays in the formation behind the drill bit 500 and convert them into detection signals. The gamma circuit unit 22 is used to amplify, filter, and shape the detection signals, converting them into digital signals that can be processed. The processing unit includes a processing circuit board and an M30 board. The processing circuit board is used to control the timing of the entire azimuth gamma geological guidance module 2 and to sample and calculate the digital signals. The M30 board is used to transmit the processed digital signals to the power supply and communication module 1 through the third part 6 and the fourth part 7, and then to the ground controller. A battery is also provided in the first cavity to provide short-term working power when the M30 board is powered off.

[0037] In a preferred embodiment, the rotary guide module 3 includes: Main control unit 31 is electrically connected to the second part 5 and is used to receive guidance instructions; Hydraulic control unit 33, three hydraulic control units 33 are electrically connected to main control unit 31 respectively, and three wing rib actuators 600 are evenly distributed along the circumference of bushing 400. Hydraulic control unit 33 is used to drive wing rib actuators 600 under the control of main control unit 31. Inclination measuring unit 32 is electrically connected to main control unit 31. Inclination measuring unit 32 is used to measure the downhole attitude of rotary steering device and transmit the attitude data to main control unit 31.

[0038] like Figure 4 As shown, three rib actuators 600 are evenly distributed circumferentially along the bushing 400. The rib actuators 600 can move radially along the bushing 400 and extend out of the outer circumferential surface of the bushing 400. They change the drilling direction by supporting the reaction force generated by the inner wall of the borehole. The main control unit 31 is electrically connected to the second part 5 and is used to control the hydraulic control unit 33 according to the guidance command, so that the hydraulic control unit 33 drives the rib actuators 600 to perform actions. The inclination measurement unit 32 is electrically connected to the main control unit 31 and is used to measure the downhole attitude of the rotary steering device and provide attitude data for rotary steering control. The three hydraulic control units 33 are respectively electrically connected to the main control unit 31 and control the motor pump according to the command of the main control unit 31, thereby driving the corresponding rib actuators 600 to perform actions. Through the cooperation of the three rib actuators 600, the rotary steering device can be guided in all directions.

[0039] In a preferred embodiment, the system further includes a first bearing 8 and a second bearing 9, which are distributed along the axial direction of the upper main shaft 200. The inner ring of the first bearing 8 is fixed to the upper main shaft 200, the inner ring of the second bearing 9 is fixed to the lower main shaft 300, and the outer rings of the first bearing 8 and the second bearing 9 are respectively fixed to the bushing 400.

[0040] like Figure 1 As shown, both the first bearing 8 and the second bearing 9 are TC bearings (i.e., thrust-radial combination bearings) in the prior art. The first bearing 8 and the second bearing 9 are distributed along the axial direction of the upper spindle 200. The first bearing 8 and the second bearing 9 enable the bushing 400 to rotate relative to the upper spindle 200 and the lower spindle 300, thereby realizing the guiding function during drilling. Moreover, the two can withstand the axial and radial loads generated during drilling, constrain the bushing 400, and ensure that the relative rotational position between the bushing 400 and the upper spindle 200 remains stable.

[0041] Working principle: The power supply and communication circuit 12 is electrically connected to the third part 6 via the first wire, and provides power to the azimuth gamma geological guidance module 2 via the third part 6 and the fourth part 7; at the same time, the gamma sensor 21 detects gamma rays in the formation behind the drill bit 500 in real time, and the detection signal is amplified, filtered, and shaped by the gamma circuit unit 22 in sequence, and then processed by the processing circuit board, and then transmitted in reverse to the power supply and communication circuit 12 via the third part 6 and the fourth part 7, and finally uploaded to the ground controller; the resolver circuit 11 is electrically connected to the first part 4 via the second wire, and the resolver circuit 11 provides high-frequency AC power to the first winding, so that an excitation magnetic field is generated in the first soft magnet, exciting... The excitation magnetic field couples with the second soft magnet through the first gap, thereby inducing a current in the second winding, which provides power to the main control unit 31, the inclination measurement unit 32, and the hydraulic control unit 33. The guidance command issued by the ground controller is modulated by the resolver circuit 11 and transmitted to the main control unit 31 through the excitation magnetic field. The main control unit 31 controls the inclination measurement unit 32 to measure the downhole attitude of the rotary guide device, and changes the characteristics of the coupled magnetic field by modulating the load of the second winding to transmit the attitude data in reverse to the resolver circuit 11. The main control unit 31 integrates the guidance command and attitude data, and controls the three hydraulic control units 33 to drive the corresponding wing rib actuators 600 to complete the precise guidance.

[0042] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A rotary guide device for zero-blind-zone geological parameter measurement, characterized in that, include: A connecting section (100) is provided with a power supply and communication module (1). Upper spindle (200), the first end of which is connected to the connecting section (100), a bushing (400) is fitted on the upper spindle (200), and a rotary guide module (3) is provided on the bushing (400). The first transmission mechanism includes a first part (4) and a second part (5). The first part (4) is disposed on the outer peripheral surface of the upper spindle (200) and electrically connected to the power supply and communication module (1). The second part (5) is disposed on the inner peripheral surface of the bushing (400) and electrically connected to the rotary guide module (3). There is an excitation magnetic field between the first part (4) and the second part (5) so that the power supply and communication module (1) and the rotary guide module (3) can transmit electrical energy and signals through the first part (4) and the second part (5). The lower spindle (300) has its first end connected to the second end of the upper spindle (200), and the second end of the lower spindle (300) is connected to a drill bit (500). The lower spindle (300) is equipped with an azimuth gamma geological guidance module (2), which is used to measure the gamma parameters of the formation at the rear end of the drill bit (500) in real time. The second transmission mechanism includes a third part (6) and a fourth part (7). The third part (6) is located at the second end of the upper spindle (200) and is electrically connected to the power supply and communication module (1). The fourth part (7) is located at the first end of the lower spindle (300) and is electrically connected to the azimuth gamma geological guidance module (2). When the upper spindle (200) is connected to the lower spindle (300), the third part (6) and the fourth part (7) abut against each other and conduct.

2. The rotary guide device for zero-blind-zone geological parameter measurement according to claim 1, characterized in that, There is a first gap between the first part (4) and the second part (5), and the projections of the first part (4) and the second part (5) overlap along the radial direction of the upper main axis (200).

3. The rotary guide device for zero-blind-zone geological parameter measurement according to claim 1, characterized in that, The third part (6) has a first annular surface and the fourth part (7) has a second annular surface. When the upper spindle (200) is connected to the lower spindle (300), the first annular surface and the second annular surface fit together.

4. The rotary guide device for zero-blind-zone geological parameter measurement according to claim 3, characterized in that, The power supply and communication module (1) is electrically connected to the first part (4) via a first wire, and is also electrically connected to the third part (6) via a second wire; The upper spindle (200) has a first channel and a second channel respectively opened on its shaft wall along its axial direction. The first channel and the second channel are symmetrically arranged with respect to the central axis of the upper spindle (200). The first wire passes through the first channel and the second wire passes through the second channel.

5. A rotary guide device for zero-blind-zone geological parameter measurement according to claim 3, characterized in that, The first part (4) includes a first soft magnet and a first winding wound on the first soft magnet. The second part (5) includes a second soft magnet and a second winding wound on the second soft magnet. The power supply and communication module (1) is electrically connected to the first winding and is used to provide high-frequency AC power to the first winding so as to power the rotary guide module (3) through the excitation magnetic field generated between the first part (4) and the second part (5), and to realize signal transmission between the power supply and communication module (1) and the rotary guide module (3) through the excitation magnetic field generated between the first part (4) and the second part (5).

6. The rotary guide device for zero-blind-zone geological parameter measurement according to claim 1, characterized in that, It also includes a first bearing (8) and a second bearing (9), the first bearing (8) and the second bearing (9) being distributed along the axial direction of the upper main shaft (200), the inner ring of the first bearing (8) being fixed to the upper main shaft (200), the inner ring of the second bearing (9) being fixed to the lower main shaft (300), and the outer rings of the first bearing (8) and the second bearing (9) being fixed to the bushing (400) respectively.

7. The rotary guide device for zero-blind-zone geological parameter measurement according to claim 1, characterized in that, The azimuth gamma geological guidance module (2) includes: Gamma sensor (21), the gamma sensor (21) is used to detect gamma rays in the formation at the rear end of the drill bit (500); Gamma circuit unit (22), which is electrically connected to the gamma sensor (21), is used to amplify, filter and shape the detection signal corresponding to the gamma ray; The processing unit is electrically connected to the gamma circuit unit (22) and the fourth part (7) respectively, and is used to process the detection signal and transmit it to the power supply communication module (1) through the third part (6) and the fourth part (7).

8. A rotary guide device for zero-blind-zone geological parameter measurement according to claim 1, characterized in that, The rotary guide module (3) includes: The main control unit (31) is electrically connected to the second part (5) and is used to receive guidance instructions. Hydraulic control unit (33), the three hydraulic control units (33) are electrically connected to the main control unit (31) respectively, and three wing-rib actuators (600) are evenly distributed along the circumference of the bushing (400). The hydraulic control unit (33) is used to drive the wing-rib actuators (600) under the control of the main control unit (31). Inclination measuring unit (32), which is electrically connected to the main control unit (31), is used to measure the downhole attitude of the rotary guide device and transmit the attitude data to the main control unit (31).

9. A rotary guide device for zero-blind-zone geological parameter measurement according to claim 1, characterized in that, The power supply and communication module (1) includes: Power supply and communication circuit (12), which is electrically connected to the third part (6), is used to receive the detection signal of the azimuth gamma geological guidance module (2); The resolver circuit (11) is electrically connected to the power supply and communication circuit (12) and the first part (4) respectively. The power supply and communication circuit (12) is used to supply power to the resolver circuit (11). The resolver circuit (11) is used to transmit guidance commands to the rotation guide module (3) and receive attitude data.

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