Low cost rotary steerable tool

Abstract

The present disclosure relates to a low-cost rotary steering tool, by designing a three-section non-magnetic flexible skeleton structure, the engineering parameter module (5) and the geological parameter module (6) are connected together to form a probe string through a multi-core coaxial connector, and then loaded into the flexible skeleton (7), which shortens the total length of the tool, and the build-up rate can be increased to 12° / 30m, the increase of the build-up rate means the increase of the applicability, and has a broader application prospect, and the tool cost is reduced; in addition, compared with the hydraulic module structure, the electromagnetic valve for the driving force piston machine structure is simple in structure and can reduce the cost by 70%, two branches can realize the steering function, compared with the previous three branches, the cost of the whole steering head can be reduced by 50%-60%, the power of the generator is reduced from the previous 300W to 160W, and the cost can be reduced by 30%-40% with the matching circuit.

Description

Technical Field

[0001] The present disclosure relates to the technical field of downhole testing instruments for oil drilling, and particularly relates to a low-cost rotary steering tool. Background Art

[0002] The statements in this section only provide background information related to the present disclosure and do not constitute prior art.

[0003] In oil drilling, the rotary steering tool integrates drilling technology, logging technology and reservoir engineering technology, and uses geological parameters, engineering parameter measurement and control-while-drilling means to ensure that the actual wellbore passes through the reservoir and obtains the best position. It has the characteristics of identifying oil and gas layers while drilling and strong steering function. This rotary steering tool can achieve true geological steering and is a high-tech in drilling in the 21st century.

[0004] Currently, in the rotary steering tool, the entire steering head requires three hydraulic modules, and the cost of a single module is nearly 300,000 yuan. The circuit part consists of 13 circuit boards and 1 directional sensor, with a cost of nearly 1 million yuan. The steering head consumes 150W of power, and a high-power 300W generator is required for the matching generator to meet the power supply needs of the steering head. The circuit matching the high-power generator costs 300,000 yuan, which results in a high cost for the entire rotary steering system. The hydraulic modules and mud bearings are time-consuming and laborious to maintain after each well operation, and the maintenance cost is relatively high. For the entire system, the high cost seriously restricts the supporting scale of the rotary steering system.

[0005] In addition, the tool string length of this rotary steering tool is 15 meters, while the length of the trailer for transporting the tool is 13 meters. During on-site transportation, it needs to be broken into two sections for transportation and then docked at the wellhead. This not only complicates the operation but also affects electrical transmission. In addition, the tool build rate is only 6.5° / 30m, which cannot meet the construction needs of high-build-rate wells.

[0006] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present disclosure, and thus may include information that does not constitute prior art. Summary of the Invention

[0007] In view of this, the present disclosure provides a rotary steering tool to solve the problems of high cost, length not meeting one-piece transportation, and low build rate of the current rotary steering tool.

[0008] To achieve the above invention purpose, a low-cost rotary steering tool includes:

[0009] Engineering parameter module, geological parameter module and flexible framework;

[0010] The engineering parameter module and the geological parameter module are connected together by a multi-core coaxial connector to form a probe string, which is then installed into the flexible frame.

[0011] In this disclosure and possible embodiments, the flexible skeleton is divided into an upper section, a middle section and a lower section. The outer diameter and length of the middle section are greater than the outer diameter and length of the upper section and the lower section. The free ends of the upper section and the lower section are respectively configured as threaded connection ports, and the outer diameter of the threaded connection port is greater than the outer diameter of the middle section.

[0012] In this disclosure and possible embodiments, the inner length of the flexible skeleton is greater than the total length of the engineering parameter module and the geological parameter module, and the portion exceeding the total length has a built-in length adjustment component.

[0013] The number of length adjustment components is multiple, to accommodate the shortening of the flexible skeleton due to fastening.

[0014] In this disclosure and possible embodiments, a compression spring is provided within the length adjustment assembly.

[0015] In this disclosure and possible embodiments, a wear-resistant strip is welded to the outer surface of the flexible skeleton.

[0016] In this disclosure and possible embodiments, the rectifier circuit module of the rotary guide tool has a flow guide sleeve placed in the inner hole at the right end of its rectifier frame. The flow guide sleeve is provided with a vertical hole and a multi-core coaxial connector male head. The circuit bus on the rectifier frame is rotated into the center of the tool through the vertical hole and connected to the multi-core coaxial connector male head. The multi-core coaxial connector male head is connected to the multi-core coaxial connector female head in the engineering parameter module.

[0017] In this disclosure and possible embodiments, the circuit bus is coated with protective paint and then wrapped with a non-magnetic shielding metal mesh.

[0018] In this disclosure and possible embodiments, the circuit bus passing through the sensor is positioned on the side away from the crystal.

[0019] In this disclosure and possible embodiments, the circuit bus is transmitted downwards in the form of a single bus, and a single pin is used to connect the two probes in a short circuit. A straightener is provided between each probe string.

[0020] In this disclosure and possible embodiments, the rectifier circuit module uses a four-layer PCB board.

[0021] In this disclosure and possible embodiments, the circuit board skeleton of the rectifier circuit module includes a high-voltage rectifier module, a main control storage module and a carrier communication module. The high-voltage rectifier module rectifies the three 160W AC power output from the mud power generation unit into 36V regulated DC power. The main control storage module adopts a single-bus, time-division multiple-master communication mode to control the communication of multiple communication nodes of the downhole tool.

[0022] In this disclosure and possible embodiments, the generator module of the rotary guide tool employs a 160W turbocharged generator.

[0023] In this disclosure and possible embodiments, the alternating current generated by the generator module enters the rectifier frame through a channel composed of a generator converter and a wire hole, and is connected to the high-voltage rectifier module, the main control storage module and the carrier communication module.

[0024] In this disclosure and possible embodiments, the pulser module of the rotary guide tool is driven by a solenoid valve, and the generator module is connected to the pulser module to control the movement of the pulse drive head.

[0025] In this disclosure and possible embodiments, the engineering parameter module consists of a triaxial gravity accelerometer, a fluxgate magnetometer, a temperature sensor, a sampling calculation module, a power supply circuit, and other modules. The sampling calculation circuit digitizes the analog measurements of the triaxial gravity and geomagnetic field components and performs compensation calculations based on the temperature measurement and bias current measurement to achieve the measurement of well inclination, azimuth, tool face, total magnetic field strength, magnetic inclination, and gravitational field strength.

[0026] In this disclosure and possible embodiments, the geological parameter measurement module performs azimuth gamma measurement to provide drilling geological parameters for the trajectory control of the guide personnel.

[0027] The beneficial effects of this invention are as follows:

[0028] This disclosed low-cost rotary guide tool features a piston-operated structure driven by a solenoid valve. Compared to the hydraulic modular structure, this design is simpler and reduces costs by 70%. Guiding functionality can be achieved with just two pistons, whereas traditional hydraulic modules require three. Therefore, the overall cost of the guide head is reduced by 50%-60% compared to conventional guide heads. The generator power is also reduced from 300W to 160W. With the addition of matching circuitry, costs can be reduced by 30%-40%. The flexible frame structure increases the inclination rate from 6.5° / 30m to 12° / 30m compared to traditional methods. This increased inclination rate signifies improved applicability and broader application prospects. Attached Figure Description

[0029] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the specification, serve to illustrate the technical solutions of this disclosure.

[0030] Figure 1a 1b, 1c, and 1d are connected in sequence to form a rotary guide tool;

[0031] Figure 2a This is a schematic diagram of the rectifier circuit module structure according to an embodiment of the present disclosure;

[0032] Figure 2b This is a cross-sectional view of the rectifier frame according to an embodiment of the present disclosure;

[0033] Figure 2c This is a three-dimensional structural diagram of the guide sleeve according to an embodiment of this disclosure;

[0034] Figure 2d This is a cross-sectional view of the guide sleeve according to an embodiment of the present disclosure;

[0035] Figure 3a This is a schematic diagram of the flexible skeleton according to an embodiment of the present disclosure;

[0036] Figure 3b for Figure 3a A sectional view;

[0037] Figure 4 This is a schematic diagram of the length adjustment component according to an embodiment of the present disclosure;

[0038] Figure 5b This is a front view of the guiding device according to an embodiment of the present disclosure;

[0039] Figure 5a and Figure 5c They are Figure 5b BB view and AA view;

[0040] Figure 5d This is a schematic diagram of the internal bus of the guide device according to an embodiment of the present disclosure;

[0041] Figure 5e for Figure 5d The right view;

[0042] Figure 5f This is a perspective structural diagram of the guide device according to an embodiment of the present disclosure. Detailed Implementation

[0043] The present disclosure is described below based on embodiments; however, it is worth noting that the present disclosure is not limited to these embodiments. In the detailed description of the present disclosure below, certain specific details are described in detail. However, those skilled in the art will fully understand the present disclosure for the parts not described in detail.

[0044] Furthermore, unless the context explicitly requires it, the words "comprising," "including," and similar terms throughout the specification and claims should be interpreted as including rather than exclusive or exhaustive; that is, meaning "including but not limited to."

[0045] Figure 1a \1b\1c\1d are connected in sequence to form the rotary guide tool described in this embodiment of the present disclosure. The rotary guide tool is composed of a pulser module 1, a connecting structure 2, a generator module 3, a rectifier circuit module 4, an engineering parameter module 5, a geological parameter module 6, a flexible frame 7, a length adjustment component 8, a central control connector 9, and a guide device 10 connected in sequence.

[0046] Among them, the pulse generator module 1 is driven by a solenoid valve to generate positive pulse pressure waves; the generator module 3 extends an upward wire and is connected to the pulse generator module 1 through the connection structure 2 to control the movement of the pulse drive head and realize the drilling fluid pressure fluctuation. The pressure sensor on the ground detects the regular fluctuation signal, and the ground decoding box converts the pressure wave into an electrical signal and transmits it to the ground decoding software, which converts it into specific parameters that can be read.

[0047] In this embodiment, the generator module 3 employs turbine power generation technology. During downhole operation, the mud slurry washes over the generator turbine rotor, driving the rotation of a strong magnetic drive shaft inside the generator housing via magnetic coupling technology. The rotation of the strong magnetic drive shaft causes periodic changes in the magnetic field, resulting in the generator coil windings cutting magnetic lines of force and generating an alternating voltage within the generator coils. This converts the kinetic energy of the mud slurry into three-phase alternating current to provide the power required for the entire downhole tool string. Furthermore, a 160W generator in generator module 3 can meet the power supply needs of all modules within the system, solving the problem of traditionally requiring a 300W generator to meet power needs, thereby significantly reducing the overall cost of the rotary steering tool.

[0048] Depend on Figure 2a As shown, the rectifier circuit module 4 consists of: a generator converter 401, a wire hole 402, an adjusting ring A 403, a protective sleeve 404, an adjusting ring B 405, a rectifier frame 406, a cover plate 407, a guide sleeve 408, and a double male short section 409.

[0049] The rectifier circuit module 4's internal circuit board skeleton mainly consists of a high-voltage rectification module, a main control storage module, and a carrier communication module. The high-voltage rectification module rectifies the three 160W AC outputs from the mud generator unit into 36V regulated DC power for use by the lower modules. The main control storage module uses a single-bus, time-division multi-master communication mode to control the communication of multiple communication nodes throughout the downhole tool, enabling stable collaborative operation of each node. It can monitor all instrument nodes, store data in real time, and achieve bidirectional communication with the surface system.

[0050] Combination Figure 2b As shown, the AC power generated by generator module 3 enters rectifier frame 406 through a channel composed of generator converter 401 and wire hole 402 via a 7-core power cable. It is connected to the high-voltage rectification, main control storage, and carrier communication modules. The bus rectified into 36V regulated DC power passes through the oblique hole 4061. The bus with the upward-facing middle hole of the lower guide sleeve 408 passes through hole 4062 and is welded together with the wire passing through hole 4061, realizing the downward transmission of the bus.

[0051] To address the issue of excessively long rotary steerable tools requiring two-stage transport and wellhead docking, which impacts electrical transmission, the overall tool length needs to be reduced by approximately 3 meters to accommodate single-stage transport. Currently, the engineering parameter module and geological parameter module are separate short circuits. Their structure consists of an external non-magnetic geological parameter drill collar frame, an internal probe-type structure, and a lower flexible frame. The flexible frame is thicker at both ends and thinner in the middle, designed to increase the build-up rate, achieving 6.5° / 30m, but this is insufficient for high build-up rate wells. Furthermore, the bus connection between engineering parameter module 5 and geological parameter module 6 is achieved through a 5mm diameter hole in the drill collar frame, allowing for vertical bus connection up to the steerable head.

[0052] Combination Figure 3a and Figure 3b As shown in this embodiment, in order to reduce the tool length and increase the tool build-up rate, the current flexible skeleton structure is improved by increasing its length and designing it as a three-section non-magnetic flexible skeleton 7, using non-magnetic material P550. At the same time, the drill collar skeletons of the non-magnetic geological parameter module 5 and engineering parameter module 6 are eliminated. The engineering parameter module 5 and geological parameter module 6 are directly connected together through a multi-core coaxial connector to form a probe string, which is then installed into the improved three-section non-magnetic flexible skeleton 7. The bus connection method is changed from the original outer wall opening type to the middle connection. On the one hand, it can shorten the total tool length, and on the other hand, it can increase the build-up rate. The final build-up rate is increased to 12° / 30m, and the total tool length is shortened by about 3m, which meets the needs of the tool as a whole section for transportation.

[0053] In traditional tools, the flexible skeleton is 2.7m long, with a structure where the two ends are large in diameter and the middle section is thinner with an outer diameter of 127mm and a length of 900mm, producing a camber rate of 6.5° / 30m. In contrast to traditional flexible skeletons, in this embodiment, the flexible skeleton 7 is designed with an outer diameter of 178mm at both ends to ensure the stiffness and strength of the threads. The middle section has an outer diameter of 150mm and a length of 300mm. To ensure the overall strength of the flexible skeleton 7 during construction and to prevent excessively long flexible sections from causing helical buckling, a wear-resistant band is welded to the surface to improve its wear resistance. Two flexible sections with an outer diameter of 127mm and a length of 900mm are designed in the upper and lower middle sections. Compared to the original design, the length is significantly increased by 127mm, resulting in greater flexibility and reduced stiffness compared to traditional flexible skeletons. This improves the overall flexibility of the tool and enhances its camber rate.

[0054] The engineering parameter module 5 and the geological parameter module 6 are designed as probe tube structures, which reduces the connection structure at both ends. The probe tube string can be placed inside the skeleton of the flexible skeleton 7. The overall length of the flexible skeleton 7 is 4.5m, and it can be processed with finer materials, which greatly reduces the processing cost. The change in structure also brings about an increase in the instrument's inclination rate.

[0055] In this embodiment, the engineering parameter module 5 consists of a triaxial gravity accelerometer, a fluxgate magnetometer, a temperature sensor, a sampling calculation module, a power supply circuit, and other modules. Through the sampling calculation circuit, the analog measurement values ​​of the triaxial gravity and geomagnetic field components are digitized, and then compensation calculations are performed based on the temperature measurement value and the bias current measurement value. Ultimately, the well inclination, azimuth, tool face, total magnetic field strength, magnetic inclination angle, and gravitational field strength can be measured.

[0056] In this embodiment, the geological parameter measurement module 6 can perform azimuth gamma measurement, thereby providing drilling geological parameter data for the trajectory control of the guide personnel. Within the probe string, the bus transmits data downwards in the form of a single bus, and a single pin is used to connect the short circuits between two probes. A centralizer is set between each probe string to ensure that the sensor is centered.

[0057] To increase the tool's build-up rate, the non-magnetic geological parameter drill collar skeleton was eliminated, and a long, non-magnetic flexible skeleton was designed instead. This three-section structure includes two narrower sections in the middle. This doubles the length of the flexible sections, increasing the build-up rate to 12° / 30m, while shortening the tool length by approximately 3m. This improves the build-up rate while reducing the overall cost of the tool. Internally, the engineering parameter module and the geological parameter module are connected together via a multi-core coaxial connector to form a probe string. The bus connection method was changed from an external wall opening to a central connection, and the upper and lower connection structures were also modified accordingly. Therefore, combined with... Figure 2c and 2d As shown, a guide sleeve 408 is placed inside the inner hole at the right end of the rectifier frame 406, so that the vertical hole of the guide sleeve 408 is connected to the hole of the rectifier frame 406. This realizes that the bus extending from the circuit on the rectifier frame 406 is turned from the outer wall to the center through the vertical hole of the guide sleeve 408. Then, the bus is connected to the engineering parameter module 5 through the horizontal hole connected to the vertical hole of the guide sleeve 408. A multi-core coaxial connector male is placed inside the guide sleeve 408, which is connected to the multi-core coaxial connector female placed in the engineering parameter module 5. This realizes the connection of the bus to the engineering parameter module 5, provides power to the engineering parameter module 5, and realizes the signal transmission channel. Similarly, the right end of the engineering parameter module 5 is connected to the geological parameter module 6 using the same multi-core coaxial connector.

[0058] The flexible framework 7 outside the engineering parameter module 5 and the geological parameter measurement module 6 is designed with two non-equal diameter drill collars with an intermediate diameter of 130mm, which can increase the system's build-up rate to 12° / 30m, thus effectively ensuring the construction of the vast majority of horizontal wells. For example... Figure 3a and Figure 3b As shown, to ensure a slope of 12° / 30m, the length of the flexible frame 7 must meet the requirement that there are two regions with narrower outer diameters within its structure. However, the total length of the engineering parameter module 5 and the geological parameter module 6 is insufficient to meet the length requirements of the two narrower outer diameter regions within the flexible frame 7. Therefore, a length adjustment component 8 is designed below the geological parameter measurement module 6. Figure 4 This allows for length adjustment. Furthermore, when the flexible skeleton 7 is being repaired, it ensures that the flexible skeleton 7 can be hooked 4-5 times, specifically achieving a 20cm length adjustment. This further ensures that the flexible skeleton 7 will not be scrapped due to a lack of hooking space; that is, the service life of the flexible skeleton 7 can be extended by shortening the length of the length adjustment component 8. Simultaneously, the length adjustment component 8 has a built-in compression spring, which keeps the entire probe string in a compressed state, better ensuring the stability of the electrical connection and mechanical structure of the pins.

[0059] Depend on Figure 5a As shown in \5b\5c, the guide device 10 consists of: a guide frame 101, a piston striking structure 102, a rotating shaft 103, a fixing bolt 104, a lower fixing ear 105, a guide plate 106, an upper fixing ear 107, a circuit board cover 108, a fixing bolt 109, and a female pin 1010. The guide device 10 is designed as a slotted drill collar structure for placing the circuit board, and has two striking structures for guiding function.

[0060] In this embodiment, because the engineering parameter module 5 and the geological parameter module 6 are placed within the flexible skeleton 7, and their buses are arranged through a centrally located string of probes, electromagnetic interference needs to be avoided. Therefore, a protective coating is applied to the conductors to isolate some electromagnetic interference, and then a non-magnetic shielding metal mesh is wrapped around the outermost layer to further isolate electromagnetic interference. When the processed bus passes through the sensor, it needs to be positioned away from the crystal to further reduce electromagnetic interference. In terms of circuitry, electronic components with strong anti-interference capabilities are preferred, and the circuit layout is optimized. The PCB board is optimized from two layers to four layers, adding two ground planes to reduce electromagnetic interference. A shielding plate is added below the circuit board to further reduce electromagnetic interference.

[0061] The working process of the rotary guide tool according to the embodiments of this disclosure is described below:

[0062] First, assemble the rotary guide tool. Connect the MWD, gamma, and connecting structure sequentially using a friction wrench, applying the specified torque. Connect the front end of the gamma to the length adjustment structure, and the rear end of the MWD to the front end of the generator, applying the specified torque. Next, clamp the generator housing onto the assembly / disassembly frame. Use a crane to insert the female thread end of the flexible skeleton into the probe string until the female thread of the flexible skeleton connects with the male thread of the generator. Apply thread lubricant, tighten using the assembly / disassembly frame, and apply the specified torque. Then, use a crane to suspend the guide head, connecting the upper female thread end to the male thread end of the flexible skeleton. Apply thread lubricant, tighten using the assembly / disassembly frame, and apply the specified torque.

[0063] As shown in Figures 5d, 5e, and 5f, when the rotary guide tool is in operation, the guide device 10 is always rotating. After the ground operator issues a guide command, the command is transmitted through the downlink system, passing through the length adjustment component 8 and the central control connector 9 into the guide device 10, achieving a seal with the flow channel conversion parts. A male pin is installed here, with a wire connected to its tail. The wire passes through the through-hole 1011 and then through the right through-hole 1012 for connection. Then, at the circuit board slot, the wire is connected to the circuit board slot, thereby realizing the transmission of bus commands to the low-cost guide device. The program in the circuit board performs closed-loop calculations on the commands within the chip, and then forms a control command, which controls the movement of the coil in the piston striking structure 102 through the female pin 1010. Based on a rotation rate of 180 revolutions per minute, the two electromagnetic coils need to be energized and de-energized three times per second to drive the solenoid valve, which in turn opens and closes the mud channel, causing the piston to extend and retract. The piston drives the guide plate 106 to strike the well wall at the same location. After multiple strikes, the well inclination angle and azimuth angle are changed, thus achieving the guiding operation. When the preset target well inclination angle or azimuth angle is reached, without the need for instructions from the surface system, the closed-loop calculation system in this device automatically switches the operation mode from guiding mode to stable inclination mode to carry out drilling. Each time, the time for transmitting guiding instructions can be saved by 5 minutes, which also reduces the wear and tear and erosion of the drilling fluid on the surface transmission system and improves the service life of the surface transmission system.

[0064] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technical improvements to the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A low-cost rotary guide tool, characterized in that, include: Engineering parameter module (5), geological parameter module (6) and flexible framework (7); The engineering parameter module (5) and the geological parameter module (6) are connected together by a multi-core coaxial connector to form a probe string, which is then installed into the flexible skeleton (7).

2. The rotary guide tool according to claim 1, characterized in that: The flexible skeleton (7) is divided into an upper section, a middle section and a lower section. The outer diameter and length of the middle section are greater than the outer diameter and length of the upper section and the lower section. The free ends of the upper section and the lower section are respectively set as threaded connection ports. The outer diameter of the threaded connection port is greater than the outer diameter of the middle section.

3. The rotary guide tool according to claim 2, characterized in that: The inner length of the flexible skeleton (7) is greater than the total length of the engineering parameter module (5) and the geological parameter module (6), and the part exceeding the total length has a built-in length adjustment component (8). The number of length adjustment components (8) is multiple to accommodate the shortening of the flexible skeleton (7) due to fastening.

4. The rotary guide tool according to claim 3, characterized in that: A compression spring is provided inside the length adjustment component (8).

5. The rotary guide tool according to any one of claims 2-4, characterized in that: The flexible skeleton (7) has a wear-resistant strip welded to its outer surface.

6. The rotary guide tool according to claim 5, characterized in that: The rectifier circuit module (4) of the rotary guide tool, the inner hole at the right end of its rectifier frame (406) A flow guide sleeve (408) is placed inside, and the flow guide sleeve (408) is provided with a vertical hole and a multi-core coaxial connector male head; the circuit bus on the rectifier frame (406) is connected to the multi-core coaxial connector male head after entering the center of the tool through the vertical hole, and the multi-core coaxial connector male head is connected to the multi-core coaxial connector female head in the engineering parameter module (5).

7. The rotary guide tool according to claim 6, characterized in that: The circuit bus is coated with protective paint and then wrapped with a non-magnetic shielding metal mesh.

8. The rotary guide tool according to claim 7, characterized in that: The circuit bus passing through the sensor is positioned on the side furthest from the crystal.

9. The rotary guide tool according to claim 8, characterized in that: The circuit bus transmits downwards in the form of a single bus, and a single pin is used to connect the two probes in a short circuit. A straightener is set between each probe string.

10. The rotary guide tool according to any one of claims 6-9, characterized in that: The rectifier circuit module (4) uses a 4-layer PCB board.

11. The rotary guide tool according to claim 10, characterized in that: The rectifier circuit module (4) includes a high-voltage rectifier module and a main control storage module on its internal circuit board frame. The block and carrier communication module, the high-voltage rectifier module rectifies the three 160W AC power output from the mud power generation unit into 36V regulated DC power; the main control storage module adopts a single-bus, time-division multi-master communication mode to control the communication of multiple communication nodes of the downhole tool.

12. The rotary guide tool according to claim 11, characterized in that: The generator module (3) of the rotary guide tool adopts a 160W turbocharged generator.

13. The rotary guide tool according to claim 12, characterized in that: The alternating current generated by the generator module (3) passes through the generator converter (401) and the wire hole. The channel formed enters the rectifier frame (406) and connects with the high-voltage rectifier module, the main control storage module and the carrier communication module.

14. The rotary guide tool according to claim 13, characterized in that: The pulse generator module (1) of the rotary guide tool is driven by a solenoid valve, and the generator module (3) is connected to the pulse generator module (1) to control the movement of the pulse drive head.

15. The rotary guide tool according to any one of claims 11-14, characterized in that: The engineering parameter module (5) consists of a triaxial accelerometer, a fluxgate, a temperature sensor, and a sampling device. It consists of modules such as sampling calculation and power supply circuit. Through the sampling calculation circuit, the analog measurement values ​​of triaxial gravity and geomagnetic field components are digitized, and compensation calculation is performed based on the temperature measurement value and the bias current measurement value to realize the measurement of well inclination, azimuth, tool face, total magnetic field strength, magnetic inclination angle and gravitational field strength.

16. The rotary guide tool according to claim 15, characterized in that: The geological parameter measurement module (6) performs azimuth gamma measurement to provide the geological parameters of the formation during drilling for the trajectory control of the guide personnel.

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