Intelligent-control friction-reducing resistance-reducing speed-increasing tool for screw drill

Abstract

The invention belongs to the technical field of petroleum drilling tools, discloses an intelligent-control friction-reducing, resistance-reducing and speed-increasing tool for a screw drill, and achieves the purpose of friction-reducing, resistance-reducing and speed-increasing. The lower portion of the tool is connected with a screw drill through a measurement-while-drilling pup joint, the upper portion of the tool is connected with an upper drill column, and the tool comprises a movable shaft connected with the screw drill; the mechanical transmission system comprises an inner shaft connected with the transmission shaft, the inner shaft rotates along with the transmission shaft to transmit torque, the friction sleeve is dynamically connected with the inner shaft through a gear clutch mechanism, and the driving assembly is used for driving the friction sleeve to move axially so as to adjust the friction force between the friction sleeve and the inner shaft; the tool face angle measuring system is used for measuring the tool face angle of the screw drill in real time and transmitting a measuring signal to the intelligent automatic control system; and the intelligent automatic control system is used for automatically regulating and controlling the friction force between the friction sleeve and the inner shaft according to the received measurement signal so as to balance the reaction torque generated by the drill bit of the screw drill and keep the tool surface stable.

Description

Technical Field

[0001] The present invention relates to the technical field of oil drilling tools, and in particular to a tool for intelligently controlling friction reduction, drag reduction and speed increase for screw drilling tools. Background Art

[0002] Screw drill bits are widely used in drilling operations of wells with complex structures, but there are many problems in the process of directional sliding drilling. The drilling fluid drives the screw drill bit to rotate clockwise to generate torque to break the rock, and at the same time generates a counter-torque on the stator, acting on the casing and the upper drill string. Due to the elasticity of the drill string, the counter-torque will cause the screw drill bit and the upper drill string to rotate counterclockwise by a certain angle, resulting in a change in the tool face angle, affecting the wellbore trajectory control. When the upper drill string stops rotating, it will also produce huge axial friction, especially in the drilling of long horizontal sections of horizontal wells and large displacement wells, which will cause serious support pressure, making the drilling pressure transmission not smooth, reducing the mechanical drilling speed and drilling efficiency. When conventional screw drill bits adjust the wellbore trajectory guidance, it is necessary to adjust the rotation angle of the upper drill string and observe the tool face angle through the drilling measurement instrument to rotate to the expected angle, but this method is time-consuming, and due to the existence of support pressure, the drilling pressure and torque are difficult to transmit to the drill bit, and the tool face angle is difficult to adjust. Although rotary steerable technology can solve these problems, its complex structure, difficult operation, and high cost of use and maintenance are not conducive to conventional drilling and it is difficult to meet the goals of "short, flat, and fast" precision drilling and optimal drilling. Summary of the invention

[0003] The present invention aims to propose an intelligent control friction reduction, drag reduction and speed-up tool for screw drilling tools. Based on the screw drilling tools, an intelligent automatic control friction reduction, drag reduction and speed-up system is developed to regulate the reverse torque generated by the drill bit, so as to achieve the purpose of friction reduction, drag reduction and speed-up.

[0004] According to the intelligent control friction reduction, drag reduction and speed-up tool for screw drilling tools of the present invention, its lower part is connected to the screw drilling tool through a measurement while drilling short circuit, and its upper part is connected to the upper drill string, including: a transmission shaft connected to the screw drilling tool; a mechanical transmission system, including an inner shaft connected to the transmission shaft, the inner shaft rotates with the transmission shaft to transmit torque, a friction sleeve dynamically connected to the inner shaft through a gear clutch mechanism, and a drive assembly, the drive assembly is used to drive the friction sleeve axially to adjust the friction between it and the inner shaft; a tool face angle measurement system, used to measure the tool face angle of the screw drilling tool in real time, and transmit the measurement signal to the intelligent automatic control system; the intelligent automatic control system, used to automatically adjust the friction between the friction sleeve and the inner shaft according to the received measurement signal, so as to balance the counter-torque generated by the drill bit of the screw drilling tool and keep its tool face stable.

[0005] Furthermore, the inner shaft and the friction sleeve are in contact with each other via a conical friction surface.

[0006] Furthermore, the gear clutch mechanism includes: a locking gear fixed on the inner shaft and an internal gear ring fixed in the friction sleeve. When the friction sleeve moves axially, the internal gear ring separates from the locking gear, so that the friction sleeve and the inner shaft have conical friction surface contact, and the locking gear meshes with the internal gear ring, so that the inner shaft and the upper drill string rotate in conjunction, thereby realizing the composite drilling of the screw drill bit and the upper drill string.

[0007] Furthermore, the intelligent control friction reduction, drag reduction and speed-up tool for screw drilling tools also includes a center tube coaxially connected to the inner shaft, the center tube concentrically passes through the friction sleeve, and the driving component includes a motor reducer assembly fixed to the center tube through a motor fixing frame, a motor drive shaft fixed in the motor fixing frame, a planetary gear mechanism, a rotating shaft and a transmission screw. The motor reducer assembly is connected to the motor drive shaft through a coupling, the motor drive shaft transmits power to the rotating shaft through the planetary gear mechanism, and the rotating shaft drives the transmission screw to drive the friction sleeve axially.

[0008] Furthermore, the motor reducer assembly is fixed in the motor fixing frame and connected to the external cable through an eight-pin power sealing plug and a five-pin power sealing plug to realize power input and signal transmission.

[0009] Furthermore, the planetary gear mechanism includes a sun gear fixed on a central tube, a plurality of planetary gears meshing with the outer circumference of the sun gear, and an internal gear meshing with the outer circumference of each planetary gear, wherein the motor reducer assembly drives the motor transmission shaft to rotate, and the motor transmission shaft drives each planetary gear to revolve around the sun gear. At the same time, the planetary gears rotate, driving the rotating shaft to rotate, and then driving the transmission screw to rotate. The transmission screw converts the rotational motion into linear motion, pushing the friction sleeve to move axially, and adjusting the friction contact pressure between the sleeve and the inner shaft.

[0010] Furthermore, there are three planetary gears which are meshed at equal intervals on the outer circumference of the sun gear and are synchronously driven by the transmission shaft. There are three transmission screws which are respectively connected to the three rotating shafts.

[0011] Furthermore, the intelligent automatic control system includes: a circuit board protection compartment, an automatic control friction reduction and drag reduction circuit located in the circuit board protection compartment, a first wireless signal transmission circuit and a first battery, the circuit protection compartment includes a protection tube, and an upper end of the protection compartment and a lower end of the protection compartment respectively connected to the upper and lower ends of the protection tube, the lower end of the protection compartment is connected to the motor fixing frame, and a high-precision pressure sensor is also installed on the pressure taking hole of the upper end of the protection compartment for receiving ground pressure control signals.

[0012] Furthermore, the inside of the circuit board protection compartment is filled with shockproof oil; a motor drive circuit protection cylinder for protecting the motor drive circuit is also fixed on the motor fixing frame, a circuit board bracket for fixing and supporting the motor drive circuit is installed in the motor drive circuit protection cylinder, and packaging glue is filled in the space formed between the motor drive circuit protection cylinder and the circuit board bracket.

[0013] Furthermore, a circuit board bin is formed on the inner shaft, and the tool face angle measurement system includes: a tool face intelligent monitoring circuit, a second wireless signal transmission circuit and a second battery located in the circuit board bin. The tool face angle measurement system monitors the tool face angle of the screw drill in real time through the tool face intelligent monitoring circuit, and sends the data to the intelligent automatic friction reduction and drag reduction circuit through the second wireless signal transmission circuit. The intelligent automatic friction reduction and drag reduction circuit calculates the required friction force adjustment amount according to the deviation between the target tool face angle and the current measured value, and the friction force demand is converted into forward and reverse rotation and speed instructions of the motor reducer assembly to achieve reverse torque balance and tool face adjustment.

[0014] Compared with the prior art, the intelligent control friction reduction, drag reduction and speed-increasing tool for screw drilling tools of the present invention has the following advantages:

[0015] 1) The tool face angle measurement system monitors the angle data in real time and feeds back to the intelligent automatic control system through inductive coupling wireless transmission technology. The wireless signal transmission and electronic sealing design ensure the real-time control capability in the harsh environment of the well. The intelligent automatic friction reduction and drag reduction circuit automatically calculates the required friction force, and the drive motor reducer assembly accurately adjusts the displacement of the friction sleeve through the mechanical amplification effect of the planetary gear and the transmission screw, so as to achieve 0° automatic balance of the tool face or precise control of any angle. The adjustment time can be shortened by more than 50%, and the angle control accuracy reaches ±5°, which significantly improves the drilling efficiency and trajectory control capability.

[0016] 2) The gear clutch and synchronous transmission structure ensure the stable operation of the system under long-term high load. In the compound drilling mode, the motor drives the friction sleeve to reset, the locking gear in the gear clutch meshes with the inner gear ring, the inner shaft and the upper drill string rotate in conjunction, and the upper drill string rotates throughout the entire process to reduce friction with the well wall, effectively reducing the support pressure problem and ensuring efficient transmission of drilling pressure;

[0017] 3) The intelligent automatic control system and mechanical transmission system are independently packaged and connected through standardized interfaces to reduce assembly and maintenance costs; the planetary gear transmission mechanism has a compact structure and a low failure rate, which greatly simplifies the structure and optimizes the cost, taking into account both high performance and economy;

[0018] 4) The design of double-layer electronic sealing structure (anti-vibration oil + packaging glue) effectively protects the circuit from downhole fluid and vibration interference, ensuring stable transmission of control signals;

[0019] 5) It has a directional mode of "friction surface contact, balanced anti-torque" and a compound mode of "clutch mechanism engagement, drill string linkage rotation". The directional mode and compound mode can be switched flexibly, which greatly improves the drilling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1This is a schematic diagram of the external structure of a tool for intelligently controlling friction reduction, drag reduction and speed increase of a screw drill according to an embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of the main cross-sectional structure of a tool for intelligently controlling friction reduction, drag reduction and speed increase of a screw drill according to an embodiment of the present invention;

[0022] Figure 3 for Figure 2 An enlarged view of a portion of the structure of a tool for intelligently controlling friction reduction, drag reduction and speed increase of a screw drill is shown;

[0023] Figure 4 It is a schematic diagram of the side cross-sectional structure of a tool for intelligently controlling friction reduction, drag reduction and speed increase of a screw drill according to an embodiment of the present invention;

[0024] Figure 5 for Figure 4 An enlarged view of a portion of the structure of a tool for intelligently controlling friction reduction, drag reduction and speed increase of a screw drill is shown;

[0025] Figure 6 for Figure 2 A schematic cross-sectional view along the AA direction is shown;

[0026] Figure 7 for Figure 2 A schematic cross-sectional view along the BB direction is shown;

[0027] Figure 8 for Figure 2 A schematic cross-sectional view along the CC direction is shown;

[0028] Among them, 1-transmission shaft, 2-lower TC dynamic housing, 3-lower TC static housing, 4-housing, 5-upper housing, 6-joint, 7-upper drill string, 8-lower TC static alloy, 9-lower TC dynamic alloy, 10-half ring, 11-spacer ring, 12-pressure ring, 13-thrust bearing group, 14-upper TC static ring housing, 15-upper TC static ring alloy sleeve, 16-upper TC dynamic ring alloy sleeve, 17-upper TC dynamic ring housing, 18-fixing ring, 19-Che's sealing spacer ring, 20-Che's sealing ring, 21-O-ring, 22-fastening screw, 23-inner shaft cover, 24-second battery, 25-inner shaft, 26-fixing screw, 27-tool face intelligent monitoring circuit, 28-second wireless signal transmission circuit, 29-fixing screw , 30-inner shaft cover O-ring, 31-friction sleeve, 32-locking pin, 33-drive screw, 34-locking pin, 35-fixing ring, 36-Che's sealing ring, 37-exhaust hole sealing plug, 38-fixing ring, 39-Che's sealing ring, 40-thrust ball bearing, 41-fixing ring, 42-deep groove ball bearing, 43-E-shaped elastic retaining ring, 44-O-ring, 45-locking pin, 46-motor drive shaft, 47-motor reduction assembly, 48-motor reduction assembly protection tube, 49-O-ring, 50-sealing plug, 51-eight-pin power sealing plug, 52-O-ring, 53-O-ring, 54-O-ring, 55-protection warehouse upper end, 56-fixing ring, 57-fixing ring , 58-O-ring, 59-Che's sealing ring, 60-Che's sealing ring, 61-fixing ring, 62-locking pin, 63-deep groove ball bearing, 64-protection tube, 65-sealing plug, 66-O-ring, 67-eight-pin power sealing plug, 68-O-ring, 69-motor drive circuit, 70-motor drive circuit protection tube, 71-O-ring, 72-circuit board bracket, 73-O-ring, 74-five-pin power sealing plug, 75-coupling, 76-O-ring, 77-locking pin, 78-motor fixing bracket, 79-fixing ring, 80-O-ring, 81-locking pin, 82-fixing ring, 83-Che's sealing ring, 84-O-ring, 85-support end, 8 6-support ring, 87-thrust ball bearing, 88-thrust ball bearing, 89-support ring, 90-deep groove ball bearing, 91-O-ring, 92-O-ring, 93-lower end of protection bin, 94-five-pin power sealing plug, 95-protection cover O-ring, 96-protection cover, 97-intelligent automatic control friction reduction and resistance reduction circuit, 98-fixing screw, 99-five-pin power sealing plug, 100-high-precision pressure sensor, 101-circuit board protection bin, 102-O-ring, 103-O-ring, 104-O-ring, 105-elastic retaining ring for hole, 106-sieve plate, 107-O-ring, 108-five-pin power sealing plug, 109-protection cover O-ring, 110-fixing screw,111-first battery, 112-protective cover, 113-first wireless signal transmission circuit, 114-O-ring, 115-five-pin power sealing plug, 116-deep groove ball bearing, 117-fixing ring, 118-center tube, 119-fixing key, 120-inner gear ring, 121-locking gear, 122-locking pin, 123-fixing key, 124-sun gear, 125-inner gear, 126-planetary gear, 127-rotating shaft, 128-sealing cover, 129-exhaust hole plugging, 130-sealing cover. , DETAILED DESCRIPTION

[0029] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0030] Figures 1 to 5 The structure of a tool 1000 for intelligently controlling friction reduction, drag reduction and speed increase for screw drill tools according to an embodiment of the present invention is shown. The tool 1000 for intelligently controlling friction reduction, drag reduction and speed increase for screw drill tools is short-circuited to the screw drill tool at the bottom through a measurement while drilling short circuit, and is connected to the upper drill string 7 at the top, and may include: a transmission shaft 1 connected to the screw drill tool; a mechanical transmission system, including an inner shaft 25 connected to the transmission shaft 1, the inner shaft 25 rotates with the transmission shaft 1 to transmit torque, a friction sleeve 31 dynamically connected to the inner shaft 25 through a gear clutch mechanism, and a drive assembly, the drive assembly is used to drive the friction sleeve 31 to move axially to adjust the friction between it and the inner shaft 25; a tool face angle measurement system, used to measure the tool face angle of the screw drill tool in real time, and transmit the measurement signal to the intelligent automatic control system; the intelligent automatic control system, used to automatically adjust the friction between the friction sleeve 31 and the inner shaft 25 through the drive assembly according to the received measurement signal, so as to balance the counter torque generated by the drill bit of the screw drill tool and keep its tool face stable.

[0031] The intelligent control friction reduction, drag reduction and speed-up tool 1000 for screw drilling tools in the embodiment of the present invention automatically controls the friction between the friction sleeve 31 and the inner shaft 25 through an intelligent automatic control system, balances the counter-torque generated by the screw drilling tool drill bit, and keeps the tool face stable, effectively solving the problems of support pressure and low mechanical drilling speed generated during sliding drilling of conventional screw drilling tools, thereby improving the drilling efficiency and the control accuracy of the wellbore trajectory.

[0032] In such Figure 2 and Figure 3 In the preferred embodiment shown, the inner shaft 25 and the friction sleeve 31 may be in contact with each other by a conical friction surface. Preferably, an inner conical friction surface is formed on the friction sleeve 31, and an outer conical friction surface is formed on the inner shaft 25. The inner shaft 25 and the friction sleeve 31 are in contact with each other by a conical friction surface. This contact mode can generate a larger friction force under a smaller axial force, thereby more accurately controlling the counter torque of the screw drill and improving the stability and control accuracy of the tool face angle.

[0033] According to the present invention, combined Figures 2 to 6 As shown, the gear clutch mechanism may include: a locking gear 121 fixed on the inner shaft 25 by a fixing key 119; an inner gear ring 120 fixed in the friction sleeve 31 by a locking pin 122. When the friction sleeve 31 moves axially, the inner gear ring 120 separates from the locking gear 121, so that the friction sleeve 31 and the inner shaft 25 are in conical friction surface contact, and the locking gear 121 is meshed with the inner gear ring 120, so that the inner shaft 25 and the upper drill string 7 are rotated in conjunction, so as to realize the composite drilling of the screw drill tool and the drill string. The setting of the gear clutch mechanism enables the friction sleeve 31 to be in conical friction surface contact with the inner shaft 25 when moving axially, and the locking gear 121 is meshed with the inner gear ring 120, so as to realize the linkage rotation of the inner shaft and the upper drill string, thereby realizing the composite drilling of the screw drill tool and the upper drill string 7, and improving the drilling efficiency and the applicability of the tool.

[0034] Back to Figures 2 to 5 In the embodiment shown, the tool 1000 for intelligently controlling friction reduction, drag reduction and speed increase of screw drilling tools may also include a center tube 118 coaxially connected to the inner shaft 25, the center tube 118 concentrically passes through the friction sleeve 31, and the drive component includes a motor reducer assembly 47 fixed to the center tube 118 through a motor mounting frame 78, a motor transmission shaft 46 fixed in the motor mounting frame 78, the motor transmission shaft 46 is preferably fixed in the motor mounting frame 78 through a thrust ball bearing 40 and a deep groove ball bearing 42, a planetary gear mechanism, a rotating shaft 127 and a transmission screw 33, the motor reducer assembly 47 is connected to the transmission shaft 46 through a coupling 75, the transmission shaft 46 transmits power to the rotating shaft 127 through the planetary gear mechanism, and the rotating shaft 127 drives the transmission screw to drive the friction sleeve 31 to move axially.

[0035] In this embodiment, the design of the center tube 118 provides a mounting base for other components. The combination of the motor reducer assembly 47, the motor transmission shaft 46, the planetary gear mechanism, the rotating shaft 127 and the transmission screw 33 realizes the conversion of the motor's rotational motion into the axial movement of the friction sleeve 31, and accurately adjusts the friction between the friction sleeve 31 and the inner shaft 25, thereby realizing effective control of the anti-torque of the screw drill. The motor reducer assembly 47 converts the high-speed low-torque of the motor into a low-speed high-torque output, so that sufficient power can be provided when driving the friction sleeve 31 to move axially, while reducing the vibration and instability factors caused by the high-speed rotation of the motor, thereby improving the stability of power transmission; through the mechanical amplification effect of the planetary gear and the transmission screw, a small motor movement can produce a significant friction adjustment, and the gear clutch mechanism and the synchronous transmission structure ensure the stable operation of the system under long-term high load.

[0036] Preferably, the motor reducer assembly 47 can be fixed in the motor fixing frame 78 by four screws, and can be connected to external cables through eight-pin power sealing plugs 51, 67 and five-pin power sealing plugs 74, 94 to achieve power input and signal transmission. The motor reducer assembly 47 is connected to external cables through power sealing plugs to achieve sealing of power input and signal transmission, effectively preventing the influence of the harsh underground environment on the motor and circuit, and improving the reliability and stability of the system.

[0037] In such Figures 2 to 5 as well as Figure 7 In the preferred embodiment shown, the planetary gear mechanism may include a sun gear 124 fixed on the center tube 118, the sun gear 124 is preferably fixed on the center tube 118 through a deep groove ball bearing 116 and a fixing ring 117, a plurality of planetary gears 126 meshing with the outer periphery of the sun gear 124, and an internal gear 125 meshing with the outer periphery of each planetary gear 126, wherein the motor reducer assembly 47 drives the motor transmission shaft 46 to rotate, and the transmission shaft 46 drives each planetary gear 126 to revolve around the sun gear 124, while the planetary gear 126 rotates. The rotation of the planetary gear 126 drives the rotation shaft 127 to rotate, thereby driving the transmission screw 33 to rotate. The transmission screw 33 converts the rotational motion into a linear motion, pushes the friction sleeve 31 to move axially, and adjusts the friction contact pressure between it and the inner shaft 25. The planetary gear 126 meshes with the sun gear 124 and the internal gear 125 at the same time, realizing multi-point meshing transmission. This transmission mode can distribute the load more evenly and reduce the pressure on a single gear, thereby improving the stability and reliability of power transmission. The combination of the motor reducer assembly 47 and the planetary gear mechanism enables the entire transmission system to achieve precise power control under different working conditions. By adjusting the speed and torque output of the motor, the planetary gear mechanism can change the distribution and transmission efficiency of power transmission accordingly, ensuring stable power transmission under various drilling conditions. At the same time, the multiple gears in the planetary gear mechanism mesh with each other to form a shock-absorbing and buffering structure. When the power output by the motor reducer assembly 47 is transmitted to the planetary gear mechanism, the meshing between the gears can absorb and disperse part of the vibration energy, reducing the impact of vibration on the entire system and further improving the stability of power transmission.

[0038] In such Figure 7In the preferred embodiment shown, there are three planetary gears 126, which are evenly meshed on the periphery of the sun gear 124 and driven synchronously by the motor transmission shaft 46. There are three transmission screws 33, which are respectively connected to the three rotating shafts 127. The three transmission screws 33 are synchronously driven by the planetary gear mechanism to ensure uniform axial movement of the friction sleeve 31 and avoid uneven friction caused by deflection. The three planetary gears 126 are evenly meshed on the periphery of the sun gear 124 and driven synchronously by the motor transmission shaft 46 to ensure uniformity and stability of power transmission. The three transmission screws 33 are respectively connected to the three rotating shafts 127, which further ensures the uniformity of axial movement of the friction sleeve 31, avoids uneven friction caused by deflection, and improves the reliability and control accuracy of the system.

[0039] According to the present invention, Figures 2 to 5 In the preferred embodiment shown, the intelligent automatic control system may include: a circuit board protection compartment 101, an automatic friction reduction and drag reduction circuit 97 located in the circuit board protection compartment 101, a first wireless signal transmission circuit 113 and a first battery 111, the circuit protection compartment 101 includes a protection tube 64, and a protection compartment upper end 55 and a protection compartment lower end 93 respectively connected to the upper and lower ends of the protection tube 64, the protection compartment lower end 93 is connected to the motor fixing frame 78, and a high-precision pressure sensor 100 is also installed on the pressure taking hole of the protection compartment upper end 55 for receiving ground pressure control signals. The automatic friction reduction and drag reduction circuit 97 is used to receive tool face angle data and ground instructions, generate and send motor control instructions, realize anti-torque balance and tool face angle adjustment, and has system protection and fault diagnosis functions. The first wireless signal transmission circuit 113 is used to transmit control instructions and angle data by wireless means, realize two-way communication between downhole tools and ground control systems, and support remote monitoring and operation.

[0040] In this embodiment, the intelligent automatic control system accurately converts the forward and reverse rotation of the motor reducer assembly 47 into the axial displacement of the friction sleeve 31 through a complete chain of real-time monitoring-command generation-motor drive-mechanical transmission-closed-loop feedback, dynamically regulates the contact pressure of the friction surface, and finally achieves the balance of the anti-torque and the stability of the tool face. The components such as the circuit board protection bin 101, the automatic friction reduction and resistance reduction circuit 97, the first wireless signal transmission circuit 113 and the first battery 111 in the intelligent automatic control system together constitute a fully functional control system. The setting of the protection cylinder 64, the upper end 55 of the protection bin and the lower end 93 of the protection bin provides effective protection for the internal circuit. The installation of the high-precision pressure sensor 100 realizes the accurate reception of the ground pressure control signal, and improves the control accuracy and response speed of the system to the tool face angle.

[0041] Combination Figure 8As shown, the sealing cover plate 128 is fixed to the lower end 93 of the protection bin by flat threads, and forms a static seal with the lower end 93 of the protection bin by two O-rings. The sealing cover plate 130 is fixed to the upper end 55 of the protection bin by flat threads. The sieve plate 106 is installed on the outside of the pressure taking hole of the upper end 55 of the protection bin and is fixed through the hole with an elastic retaining ring 105. The sieve plate 106 can effectively filter solid impurities in the mud to prevent clogging of the pressure measuring hole of the high-precision pressure sensor 100; six exhaust hole plugs 129 respectively seal the injection hole and exhaust hole of the motor fixing frame 78, the sealing cover plate 128 and the sealing cover plate 130 to prevent external fluid from invading.

[0042] In a preferred embodiment, the circuit board protection compartment 101 can be filled with shockproof oil, which effectively reduces the impact of vibration on the circuit board and improves the stability and life of the circuit; the motor fixing frame 78 can also be fixed with a motor drive circuit protection cylinder 70 for protecting the motor drive circuit 69, and the motor drive circuit protection cylinder 70 can be installed with a circuit board bracket 72 for fixing and supporting the motor drive circuit 69. The space formed between the motor drive circuit protection cylinder 70 and the circuit board bracket 72 can be filled with packaging glue, which further enhances the protection of the motor drive circuit 69, prevents the intrusion of external liquids and impurities, and improves the reliability and adaptability of the system. In this embodiment, the design of a double-layer electronic sealing structure (shockproof oil + packaging glue) effectively protects the circuit from downhole fluid and vibration interference, ensuring stable transmission of control signals.

[0043] According to the present invention, a circuit board compartment may be formed on the inner shaft 25, and the tool face angle measurement system may include: a tool face intelligent monitoring circuit 27, a second wireless signal transmission circuit 28 and a second battery 24 located in the circuit board compartment, and a sealing structure is formed by the inner shaft cover plate 23 and the O-ring 30 to monitor the tool face angle in real time and transmit data wirelessly through inductive coupling technology. The tool face angle measurement system monitors the tool face angle of the screw drill in real time through the tool face intelligent monitoring circuit 27, and sends the data to the intelligent self-control friction reduction and drag reduction circuit 97 through the second wireless signal transmission circuit 28. The intelligent self-control friction reduction and drag reduction circuit 97 calculates the required friction adjustment amount according to the deviation between the target tool face angle and the current measured value, and the friction demand is converted into the forward and reverse rotation and speed instructions of the motor reducer assembly 47 to achieve anti-torque balance and tool face adjustment.

[0044] Specifically, after receiving the instruction, the motor drive circuit 69 controls the direction and speed of the motor reducer assembly 47, and the motor drive shaft 46 is connected to the planetary gear 126 through the coupling 75, driving the three planetary gears 126 to rotate synchronously. The planetary gear 126 meshes with the internal gear 125 to transmit the torque to the transmission screw 33. The transmission screw 33 can be connected to the motor drive shaft 46 and the rotating shaft 127 through a flat thread. When the motor rotates forward, the transmission screw 33 rotates clockwise, pushing the friction sleeve 31 to move axially toward the conical friction surface of the inner shaft 25, increasing the contact pressure, thereby increasing the friction force. When the motor rotates reversely, the transmission screw 33 rotates counterclockwise, and the friction sleeve 31 moves away from the friction surface, reducing the contact pressure, thereby reducing the friction force. The axial displacement of the friction sleeve 31 directly controls the contact area and pressure between its inner conical friction surface and the outer conical friction surface of the inner shaft 25, and the friction force changes linearly with the contact pressure. The adjusted friction force acts on the screw drill housing to balance the counter-torque generated by the drill bit, and the tool face angle changes accordingly. The tool face angle measurement system continuously feeds back the new angle value, and the intelligent automatic control system corrects the motor command again until the tool face stabilizes at the target angle (such as 0±5°).

[0045] The specific structure of the intelligent control friction reduction, drag reduction and speed increase tool 1000 for screw drilling tools according to the embodiment of the present invention is described in detail below:

[0046] Combination Figures 1 to 8 As shown, the transmission shaft 1, the lower TC dynamic housing 2, the lower TC static housing 3, the housing 4, the lower TC static alloy 8, the lower TC dynamic alloy 9, the half ring 10, the spacer ring 11, the pressure ring 12, the thrust bearing group 13, the upper TC static ring housing 14, the upper TC static ring alloy sleeve 15, the upper TC dynamic ring alloy sleeve 16, and the upper TC dynamic ring housing 17 constitute the transmission shaft assembly structure.

[0047] The tool face angle measurement system includes an inner shaft 25, an inner shaft cover 23, a tool face intelligent monitoring circuit 27, a fixing screw 26, a second wireless signal transmission circuit 28, a second battery 24, a plurality of O-rings, etc. The tool face intelligent monitoring circuit 27, the second wireless signal transmission circuit 28 and the second battery 24 are installed in the circuit board compartment of the inner shaft 25, and a sealing structure is formed by the inner shaft cover 23 and the O-ring 30. The tool face intelligent monitoring circuit 27 can measure the tool face angle of the screw drill in real time, and transmit the real-time monitoring data to the intelligent automatic control friction reduction and drag reduction circuit 97 through the second wireless signal transmission circuit 28. The upper shell 5 is connected to the shell 4 through a tapered thread, the inner shaft 25 is connected to the transmission shaft 1 through a flat thread, four Che's sealing rings 19, Che's sealing rings 20, and O-rings 21 are installed on the inner shaft 25 to form a rotating sealing structure with the upper shell 5, and the fixing ring 18 fixes the four Che's sealing rings 19, Che's sealing rings 20, and O-rings 21 in the upper shell 5. The second battery 24, the tool face intelligent monitoring circuit 27, and the second wireless signal transmission circuit 28 are fixedly installed in the circuit board compartment of the inner shaft 25 through a plurality of fixing screws 26, and the inner shaft cover plate 23 The inner shaft 25 is fixed by a plurality of fastening screws 22, the inner shaft cover plate O-ring 30 is installed in the sealing groove of the inner shaft 25 to form a static seal with the inner shaft cover plate 23, the locking gear 121 is passed through the inner shaft 25, the fixing key 119 is installed in the keyway of the inner shaft 25, the locking gear 121 is locked and transmitted through the fixing key 119, the fixing ring 79 is installed on the inner shaft 25 through a flat thread and is locked by the locking pin 32 to prevent it from rotating and unfastening, the fixing ring 79 supports the locking gear 121 to prevent it from axial movement, and the inner gear ring 120 is locked by six locking pins 122 (such as Figure 6 As shown) is fixed in the friction sleeve 31.

[0048] The mechanical transmission system includes a friction sleeve 31, a transmission screw 33, a transmission shaft 46, a car-type sealing ring 36, a car-type sealing ring 39, a thrust ball bearing 40, a thrust ball bearing 87, a thrust ball bearing 88, a sun gear 124, an internal gear 125, a planetary gear 126, a rotating shaft 127, a coupling 75, a motor reducer assembly 47, a plurality of five-core power sealing joints, a motor reducer assembly protection tube 48, an eight-core power sealing joint 51, a motor fixing frame 78, a fixing ring 79, a deep groove ball bearing 116, a plurality of O-rings, a sealing cover plate 112, an exhaust hole plug 37, etc. The motor reducer assembly 47 is fixedly installed on the motor fixing frame 78 by four screws, and the motor fixing frame 78 is also moved by a flat The motor reducer assembly protection tube 48 is filled with anti-vibration oil through the injection hole of the motor fixing frame 78, which has a shock-absorbing effect on the motor reducer assembly 47 and lubricates the two thrust ball bearings 40 and the deep groove ball bearings 42. The motor drive circuit protection tube 70 is filled with packaging glue to reduce the shock of the motor drive circuit 69. The six exhaust holes are plugged 129 to seal the injection holes and exhaust holes of the motor fixing frame 78, the sealing cover plate 128 and the sealing cover plate 130 respectively. The sealing cover plate 128 and the sealing cover plate 130 are fixed to the lower end 93 of the protection bin by flat threads, and are respectively statically sealed with the lower end 93 of the protection bin by two O-rings. The motor fixing frame 78, the sealing cover plate 128 and the sealing cover plate 130 form a static seal. The cover plate 128 and the sealing cover plate 130 are evenly distributed in the circumference, the transmission shaft 46 passes through the transmission holes of the lower end 93 of the protection bin, the motor fixing frame 78 and the support end 85, one end of the transmission shaft 46 is connected to the output shaft of the motor reducer assembly 47 through the coupling 75 to transmit power, the transmission shaft 46 and the output shaft of the motor reducer assembly 47 are fastened by two locking pins 45, the deep groove ball bearing 42 is installed on the transmission shaft 46 and the inner ring is axially fixed by the E-shaped elastic retaining ring 43, the fixing ring 41 is installed on the motor fixing frame 78 by flat threads to fix the outer ring of the deep groove ball bearing 42, and the two thrust ball bearings 40 are respectively installed on the step surface in the middle of the transmission shaft 46, and are fixed in the lower end 93 of the protection bin through the motor fixing frame 78. A fixing ring 38 is strung on the transmission shaft 46 and installed in the lower end 93 of the protection chamber through a flat thread to fix two Che's sealing rings 39. The lower end 93 of the protection chamber and the transmission shaft 46 form a rotating seal through the two Che's sealing rings 39. Another four fixing rings 38, four Che's sealing rings 39, four thrust ball bearings 40, two fixing rings 41, two deep groove ball bearings 42 and similar structures are evenly distributed on the lower end 93 of the protection chamber and are passed through by two rotating shafts 127 to form a rotating sealing structure. Three planetary gears 126, an internal gear 125, a rotating shaft 127, a sun gear 124, two thrust ball bearings 87, four thrust ball bearings 88 and a deep groove ball bearing 116 constitute a planetary transmission mechanical structure that resists axial vibration.The three planetary gears 126 are fixed on the transmission shaft 46 and the two rotating shafts 127 respectively through three fixing keys 123 and axially fixed through three E-shaped elastic retaining rings. The two thrust ball bearings 87 are respectively installed on both sides of the internal gear 125. The three are installed between the support end 85 and the lower end 93 of the protection bin. The deep groove ball bearing 116 is installed in the middle of the sun gear 124 and the outer ring of the deep groove ball bearing 116 is fixed by the fixing ring 117. The fixing ring 117 is installed on the sun gear 124 through a flat thread. The four thrust ball bearings 88 are distributed in the inner cavity on both sides of the sun gear 124 and are axially fixed by the support ring 86 and the support ring 89 respectively. The support ring 89 fixes the outer ring of the deep groove ball bearing 90. The two Che seals 83 are respectively installed in the center of the support end 85 The two sides of the hole are fixed by a fixing ring 82 and a supporting ring 86 respectively. The fixing ring 82 is installed on the supporting end 85 through a flat thread. The center tube 118 passes through the supporting end 85, two Che's sealing rings 83, a fixing ring 82, a supporting ring 86, four thrust ball bearings 88, an outer ring of a deep groove ball bearing 116, a fixing ring 117, a supporting ring 89, a deep groove ball bearing 90, a lower end 93 of the protection bin, a circuit board protection bin 101, a deep groove ball bearing 63, a fixing ring 61, a fixing ring 57, two Che's sealing rings 59, two Che's sealing spacers 60 and an upper end 55 of the protection bin. One side of the center tube 118 is connected to the inner shaft 25 through a flat thread. The center tube 118 and the inner shaft 25 form a static seal through two O-rings 80. Four locking The pin 81 locks the center tube 118 to prevent it from rotating and unfastening. The center tube 118 can rotate freely in the circuit board protection compartment 101. The center tube 118 forms a rotating seal with two Che's sealing rings 83 and two Che's sealing rings 59 respectively. The transmission shaft 46 passes through the axial hole of the support end 85, two fixing rings 35 and two Che's sealing rings 36. The two fixing rings 35 are installed on the support end 85 through flat threads and fix the two Che's sealing rings 36. The transmission shaft 46 and the two Che's sealing rings 36 form a rotating seal. The other four fixing rings 35 and four Che's sealing rings 36 are evenly distributed on the support end 85 in the circumferential direction and are passed through by two rotating shafts 127 to form a rotating seal structure. The spline of the support end 85 is along the inner spline of the joint 6. At the positioning step in the middle of the keyway moving path, the support end 85 and the joint 6 form a static seal through two O-rings 84. The three transmission screws 33 are respectively connected to the transmission shaft 46 and the two rotating shafts 127 through flat threads. The three locking pins 34 respectively lock the three transmission screws 33 to prevent them from falling off. The three transmission screws 33 are respectively screwed into the three holes in the inner circumference of the friction sleeve 31. The splines of the friction sleeve 31 are free to move axially along the spline groove inside the joint 6. After the motor drive circuit 69 receives the drive command of the intelligent automatic control system, the motor drive circuit 69 drives the motor reduction assembly 47 to rotate in the opposite direction, driving the transmission shaft 46 to rotate in the opposite direction, the transmission shaft 46 drives the planetary gear 126 to rotate in the opposite direction, and the planetary gear 126 drives the internal gear 125 to rotate in the opposite direction.The inner gear 125 drives the other two planetary gears 126 to rotate in the opposite direction. The sun gear 124 ensures that the three planetary gears rotate evenly and prevents radial runout. The other two planetary gears 126 are respectively fixed on two rotating shafts 127. The two rotating shafts 127 drive the other two transmission screws 33 to rotate in the opposite direction. The three transmission screws 33 can ensure the uniform axial movement of the friction sleeve 31. The locking gear 121 and the inner gear ring 120 constitute a gear clutch mechanism. When the friction sleeve 31 moves evenly along the axial direction of the inner shaft 25, the gear clutch is disengaged, and the inner conical friction surface of the friction sleeve 31 contacts the outer conical friction surface of the inner shaft. After the intelligent self-control friction and resistance reduction circuit 97 calculates the motor thrust, it sends a command to the motor drive circuit 69 to control the motor reduction assembly 48 to provide the calculated thrust to the friction sleeve 31, automatically adjust the friction between the inner conical friction surface of the friction sleeve 31 and the outer conical friction surface of the inner shaft, and then adjust the size of the counter torque of the drill bit of the balanced screw drill, thereby realizing the automatic 0° balance of the tool face of the screw drill and the arbitrary adjustment of the tool face angle, and realizing real-time control of the wellbore trajectory.

[0049] The intelligent automatic control system includes a lower end 93 of the protection bin, a motor drive circuit protection tube 70, a circuit board protection bin 101, an upper end 55 of the protection bin, a protection tube 64, a circuit board bracket 72, a sealing plug 65, a protection cover 96, a protection cover 112, a plurality of O-rings, a motor drive circuit 69, an intelligent automatic control friction reduction and resistance reduction circuit 97, a first wireless signal transmission circuit 113, a first battery 111, a high-precision pressure sensor 100, etc. The two ends of the circuit board protection bin 101 are respectively inserted into the central holes of the lower end 93 of the protection bin and the upper end 55 of the protection bin and are respectively sealed by two O-rings 92 and two O-rings 104. The protection tube 64 is connected to the lower end 93 of the protection bin through a flat thread and is sealed by two O-rings. 91 constitutes a static seal, the protection tube 64 is connected to the upper end 55 of the protection chamber through a reverse flat thread and is statically sealed through two O-rings 102, the lower end 93 of the protection chamber, the upper end 55 of the protection chamber, the protection tube 64, the O-ring 91, the O-ring 103, the O-ring 92, the O-ring 102, the O-ring 104, etc. constitute the first layer of electronic sealing protection structure and are filled with shockproof oil, which can not only play a shockproof role but also facilitate heat conduction and heat dissipation, the circuit board bracket 72, the sealing plug 65, the motor drive circuit protection tube 70, a plurality of power sealing joints, etc. constitute the second layer of electronic sealing protection structure of the motor drive circuit 70, the intelligent automatic control friction reduction and resistance reduction circuit 97, the first wireless signal transmission circuit 113, the first battery 111 is fixedly installed in the circuit board protection compartment of the circuit board protection compartment 101 by multiple fixing screws 98 and multiple fixing screws 110, and is sealed and protected by the protection cover 96, the protection cover 112, the power sealing joint, the O-ring 95 and the O-ring 109 to form a second layer of electronic sealing structure and filled with packaging glue. The double-layer electronic sealing filling protection structure can effectively protect the circuit part from external liquid corrosion and conductive burning of the circuit and can play a good shockproof effect. The first wireless signal transmission circuit 113 and the intelligent automatic control friction reduction and drag reduction circuit 97 can be connected through the RS485 communication method, and the tool face angle information measured by the tool face angle measurement system is transmitted to the intelligent automatic control friction reduction and drag reduction circuit 97 for processing in real time, and high precision The high-precision pressure sensor 100 is installed on the pressure-taking hole of the upper end 55 of the protection chamber through a flat thread and forms a static seal through two O-rings 102. The sieve plate 106 is installed on the outer side of the pressure-taking hole of the upper end 55 of the protection chamber and fixed through the hole with an elastic retaining ring 105. The sieve plate 106 can effectively filter solid impurities in the mud to prevent blocking the pressure measuring hole of the high-precision pressure sensor 100. The fixing ring 56 is connected to the joint 6 through a flat thread and fixes the upper end 55 of the protection chamber to prevent its axial movement. The fixing ring 57 is connected to the joint 6 through a flat thread and fixes two Che's sealing spacers 60 and the fixing ring 61. The fixing ring 61 fixes the outer ring of the deep groove ball bearing 63. The two Che's sealing spacers 60 and the joint 6 form a static seal through two O-rings 58 respectively.The high-precision pressure sensor 100 receives the pressure control signal from the ground and transmits the signal to the intelligent self-control friction and drag reduction circuit 97 for processing. The intelligent self-control friction and drag reduction circuit 97 calculates and issues corresponding control instructions based on different ground pressure control instructions and the real-time information of the tool face angle of the screw drill measured by the tool face angle measurement system received by the first wireless signal transmission circuit 113. The motor drive circuit controls the motor reduction assembly 47 to rotate forward or reverse, thereby realizing the tool face angle adjustment counter torque and linkage compound drilling of the screw drill.

[0050] The working principle of the intelligent control friction reduction, drag reduction and speed increase tool 1000 for screw drilling tools according to the embodiment of the present invention is described in detail below:

[0051] (1) Working principle of automatic balancing anti-torque: The connector 6 of the intelligent control friction reduction, drag reduction and speed-up tool 1000 for screw drill is connected to the upper drill string 7, the transmission shaft 1 is connected to the while drilling measurement short circuit, the while drilling measurement short circuit is connected to the outer shell of the screw drill, the anti-torque of the drill bit acts on the outer shell of the screw drill, and the anti-torque of the drill bit acts on the transmission shaft 1 through the while drilling measurement short circuit. During directional drilling, after the measurement while drilling short circuit monitors that the tool face of the screw drill tool has reached the predetermined position I of directional drilling, the wellhead sends a balanced torque pressure pulse command A. After the high-precision pressure sensor 100 detects the command, it transmits the command to the intelligent automatic friction and drag reduction circuit 97. The intelligent automatic friction and drag reduction circuit 97 automatically issues a motor drive instruction to the motor drive circuit 69. The motor drive circuit 69 energizes the motor reduction assembly 47 to reverse. The motor reduction assembly 47 reverses and drives the motor drive shaft 46 to rotate in the opposite direction through the coupling 75. The planetary gear 126 is fixed to the motor drive shaft 46 by the fixing key 123. The motor transmission shaft 46 is positioned by an E-shaped elastic retaining ring, and the other end is connected to the transmission screw 33 by a flat thread, and the motor transmission shaft 46 and the transmission screw 33 are fixed by a locking pin 34. The motor transmission shaft 46 drives the transmission screw 33 to rotate in the opposite direction, and the transmission screw 33 drives the friction sleeve 31 to move axially. The planetary gear 126 drives the internal gear 125 to rotate in the opposite direction, and the internal gear 125 drives the other two planetary gears 126 to rotate in the opposite direction. The other two planetary gears 126 are respectively fixed on two rotating shafts 127, and the other ends of the two rotating shafts 127 are respectively connected to the other two transmission screws 33. Thereby, the other two transmission screws 33 are driven to rotate in the opposite direction. The three transmission screws 33 can ensure the uniform axial movement of the friction sleeve 31. The locking gear 121 is fixed to the inner shaft 25 by the fixing key 119. The inner gear ring 120 is fixed to the inner side of the friction sleeve 31 by six locking pins 122. The locking gear 121 and the inner gear ring 120 constitute a gear clutch mechanism. When the friction sleeve 31 moves uniformly along the axial direction of the inner shaft 25, the gear clutch is disengaged, and the inner conical friction surface of the friction sleeve 31 contacts the outer conical friction surface of the inner shaft 25. The motor reduction assembly 47 continuously provides thrust to the friction sleeve 31. The inner shaft 25 stops rotating in a balanced state, that is, balanced torque, the balanced torque current is A, and the tool face intelligent monitoring circuit 27 monitors that the inner shaft 25 remains motionless, that is, the tool face remains motionless at a°. The tool face intelligent monitoring circuit 27 sends the monitoring signal of the tool face remaining motionless through the second wireless signal transmission circuit 28 to the first wireless signal transmission circuit 113, and the first wireless signal transmission circuit 113 transmits the signal to the intelligent automatic control friction reduction and drag reduction circuit 97. The intelligent automatic control friction reduction and drag reduction circuit 97 automatically sends a shutdown command of the motor reduction assembly 47 to the motor drive circuit 69 to power off the motor reduction assembly 47 and shut down.

[0052] (2) Working principle of automatic balancing of tool face at 0±5°: ① When the tool face angle a° is in the range of 0 to 180° clockwise, the intelligent self-control friction reduction and drag reduction circuit 97 automatically sends a command of a balancing torque current A of the motor reduction assembly 47 to the motor drive circuit 69 to energize the motor reduction assembly 47, increase the starting current to A, and then automatically reduce the current to B, thereby reducing the thrust of the friction sleeve 31, so that the torque of the friction sleeve 31 is less than the balancing torque, and the inner shaft 25 drives the friction sleeve 31 to rotate counterclockwise until the tool face intelligent monitoring circuit 27 monitors that the tool face rotates to about 0±5°. The tool face intelligent monitoring circuit 27 sends the monitoring signal to the first wireless signal transmission circuit 113 through the second wireless signal transmission circuit 28. , the first wireless signal transmission circuit 113 transmits the signal to the intelligent automatic friction reduction and drag reduction circuit 97, the intelligent automatic friction reduction and drag reduction circuit 97 automatically sends a motor reduction assembly 47 balancing torque current A instruction to the motor drive circuit 69 to power on the motor reduction assembly 47 and increase the starting current to A, the tool face intelligent monitoring circuit 27 sends a monitoring signal that the tool face remains stationary at 0±5° to the first wireless signal transmission circuit 113 through the second wireless signal transmission circuit 28, and the first wireless signal transmission circuit 113 transmits the signal to the intelligent automatic friction reduction and drag reduction circuit 97, the intelligent automatic friction reduction and drag reduction circuit 97 automatically sends a motor reduction assembly 47 shutdown instruction to the motor drive circuit 69 to power off the motor reduction assembly 47 and shut down.

[0053] ② When the tool face angle a° is in the range of 180° to 360° clockwise, the intelligent self-control friction reduction and drag reduction circuit 97 automatically sends a motor reduction assembly 47 balance torque current A instruction to the motor drive circuit 69 to energize the motor reduction assembly 47 and increase the starting current to A, and then automatically increase the current to C, thereby increasing the thrust of the friction sleeve 31, so that the torque of the friction sleeve 31 is greater than the balance torque, and the friction sleeve 31 drives the inner shaft 25 to rotate clockwise until the tool face intelligent monitoring circuit 27 monitors that the tool face rotates to about 0±5°. The tool face intelligent monitoring circuit 27 sends the monitoring signal to the first wireless signal transmission circuit 113 through the second wireless signal transmission circuit 28. The first wireless signal transmission circuit 113 The transmission circuit 113 transmits the signal to the intelligent automatic friction reduction and drag reduction circuit 97, and the intelligent automatic friction reduction and drag reduction circuit 97 automatically sends a motor reduction assembly 47 balancing torque current A instruction to the motor drive circuit 69 to power on the motor reduction assembly 47 and reduce the starting current to A. The tool face intelligent monitoring circuit 27 sends a monitoring signal that the tool face remains stationary at 0±5° to the first wireless signal transmission circuit 113 through the second wireless signal transmission circuit 28, and the second wireless signal transmission circuit 113 transmits the signal to the intelligent automatic friction reduction and drag reduction circuit 97, and the intelligent automatic friction reduction and drag reduction circuit 97 automatically sends a motor reduction assembly 47 shutdown instruction to the motor drive circuit 69 to power off the motor reduction assembly 47 and shut down.

[0054] Automatically adjust the tool face to b° Working principle: The measurement while drilling short circuit monitors the current tool face angle of the screw drill at around 0±5°, and transmits the monitoring signal to the ground. The tool face angle of the screw drill needs to be adjusted to b°. ① When the adjusted angle b° is in the range of 0 to 180° clockwise, the wellhead sends an angle adjustment pressure pulse command B, and each command adjusts the positive rotation by X° (X=5°). After the high-precision pressure sensor 100 detects the command, it transmits the command to the intelligent automatic control friction reduction and drag reduction circuit 97. The intelligent automatic control friction reduction and drag reduction circuit 97 automatically sends a motor reduction assembly 47 balancing torque current A instruction to the motor drive circuit 69 to energize the motor reduction assembly 47 to increase the starting current to A, and then automatically increase the current to C, thereby increasing the thrust of the friction sleeve 31, so that the torque of the friction sleeve 31 is greater than the balancing torque. The friction sleeve 31 drives the inner shaft 25 to rotate clockwise until the tool face intelligent monitoring circuit 27 monitors that the tool face rotates to about X°. The tool face intelligent monitoring circuit 27 sends the monitoring signal to the first wireless signal transmission circuit 113 through the second wireless signal transmission circuit 28. A wireless signal transmission circuit 113 transmits the signal to the intelligent automatic control friction reduction and drag reduction circuit 97, and the intelligent automatic control friction reduction and drag reduction circuit 97 automatically sends a motor reduction assembly 47 balancing torque current A instruction to the motor drive circuit 69 to power on the motor reduction assembly 47 and reduce the starting current to A. The tool face intelligent monitoring circuit 27 sends a monitoring signal that the tool face remains stationary at X° to the first wireless signal transmission circuit 113 through the second wireless signal transmission circuit 28. The first wireless signal transmission circuit 113 transmits the signal to the intelligent automatic control friction reduction and drag reduction circuit 97, and the intelligent automatic control friction reduction and drag reduction circuit 97 automatically sends a motor reduction assembly 47 shutdown instruction to the motor drive circuit 69 to power off and shut down the motor reduction assembly 47. The measurement while drilling short-circuit monitors that the tool face angle of the current screw drill is near X°, and repeats "sending angle adjustment pressure pulse command B from the wellhead" for (b / X-1) times until the tool face intelligent monitoring circuit 27 monitors that the tool face angle of the screw drill is near b°. The measurement while drilling short-circuit monitors that the tool face angle of the current screw drill is near b°, and transmits the monitoring signal to the ground to start directional drilling.

[0055] ② When the adjusted angle b° is in the range of 180 to 360° clockwise, the wellhead sends an angle adjustment pressure pulse command C, and each command adjusts the reverse rotation by X° (X=5°). After the high-precision pressure sensor 100 detects the command, it transmits the command to the intelligent automatic friction reduction and drag reduction circuit 97. The intelligent automatic friction reduction and drag reduction circuit 97 automatically sends a motor reduction assembly 47 balance torque current A command to the motor drive circuit 69 to energize the motor reduction assembly 47 to increase the starting current to A, and then automatically reduce the current to B, reducing the thrust of the friction sleeve 31, so that the torque of the friction sleeve 31 is less than the balance torque, and the inner shaft 25 drives the friction sleeve 31 to rotate counterclockwise until the tool face intelligent monitoring circuit 27 monitors that the tool face has rotated to near -X°. The tool face intelligent monitoring circuit 27 sends the monitoring signal to the first wireless signal transmission circuit 113 through the second wireless signal transmission circuit 28. A wireless signal transmission circuit 113 transmits the signal to the intelligent automatic control friction reduction and drag reduction circuit 97, and the intelligent automatic control friction reduction and drag reduction circuit 97 automatically sends a motor reduction assembly 47 balancing torque current A instruction to the motor drive circuit 69 to power on the motor reduction assembly 47 and increase the starting current to A. The tool face intelligent monitoring circuit 27 sends a monitoring signal that the tool face remains stationary at -X° to the first wireless signal transmission circuit 113 through the second wireless signal transmission circuit 28. The first wireless signal transmission circuit 113 transmits the signal to the intelligent automatic control friction reduction and drag reduction circuit 97, and the intelligent automatic control friction reduction and drag reduction circuit 97 automatically sends a motor reduction assembly 47 shutdown instruction to the motor drive circuit 69 to power off and shut down the motor reduction assembly 47. The measurement while drilling short-circuit monitors that the tool face angle of the current screw drill is near -X°, and repeats "sending angle adjustment pressure pulse command C from the wellhead" for (b / X-1) times until the tool face intelligent monitoring circuit 27 monitors that the tool face angle of the screw drill is near b°. The measurement while drilling short-circuit monitors that the tool face angle of the current screw drill is near b°, and transmits the monitoring signal to the ground to start directional drilling.

[0056] (3) Working principle of composite drilling: When directional drilling is completed and composite drilling is required to stabilize the inclination, the measurement while drilling short circuit monitors that the tool face of the screw drill tool has reached the predetermined position II of composite drilling, and the wellhead sends a reset pressure pulse command D. After the high-precision pressure sensor 100 detects the command, it transmits the command to the intelligent automatic control friction and resistance reduction circuit 97. The intelligent automatic control friction and resistance reduction circuit 97 automatically sends a forward rotation command of the motor reduction assembly 47 to the motor drive circuit 69 to energize the motor reduction assembly 47 to start forward rotation, so that the friction sleeve 31 moves axially in the reverse direction, and the friction sleeve 31 drives the inner gear ring 120 to mesh with the locking gear 121, and the gear clutch is connected, and the inner conical friction surface of the friction sleeve 31 is disengaged from the outer conical friction surface of the inner shaft 25. As the upper drill string rotates continuously clockwise for 20 seconds or more, the tool face intelligent monitoring circuit 27 automatically issues a motor shutdown command, and the command is sent to the first wireless signal transmission circuit 113 through the second wireless signal transmission circuit 28. The first wireless signal transmission circuit 113 transmits the signal to the intelligent automatic control friction reduction and drag reduction circuit 97. After receiving the command and detecting that the motor current increases to D current for 5 consecutive seconds, the intelligent automatic control friction reduction and drag reduction circuit 97 automatically issues a motor reduction assembly 47 shutdown command to the motor drive circuit 69 to power off the motor reduction assembly 47 and shut it down. The friction sleeve 31 is reset to the initial position, and the measurement while drilling short circuit monitors that the tool face of the screw drill bit rotates continuously in the positive direction with the upper drill string, and composite drilling begins.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A tool for intelligently controlling friction reduction, drag reduction and speed increase of screw drilling tools, the lower part of which is connected to the screw drilling tool through a measurement while drilling short circuit, and the upper part is connected to the upper drill string, characterized in that: include: A transmission shaft connected to the screw drill; A mechanical transmission system, comprising an inner shaft connected to the transmission shaft, the inner shaft rotating with the transmission shaft to transmit torque, a friction sleeve dynamically connected to the inner shaft through a gear clutch mechanism, and a drive assembly, the drive assembly being used to drive the friction sleeve to move axially to adjust the friction between the friction sleeve and the inner shaft; A tool face angle measurement system, used for measuring the tool face angle of the screw drill in real time and transmitting the measurement signal to the intelligent automatic control system; The intelligent automatic control system is used to automatically adjust the friction between the friction sleeve and the inner shaft according to the received measurement signal to balance the counter torque generated by the screw drill bit to keep the tool face stable.

2. The intelligent control friction reduction, drag reduction and speed increase tool for screw drilling tools according to claim 1 is characterized in that: The inner shaft and the friction sleeve are in contact with each other through a conical friction surface.

3. The intelligent control friction reduction, drag reduction and speed-increasing tool for screw drilling tools according to claim 2 is characterized in that: The gear clutch mechanism comprises: a locking gear fixed on the inner shaft and an inner gear ring fixed in the friction sleeve. When the friction sleeve moves axially, the inner gear ring separates from the locking gear, so that the friction sleeve and the inner shaft are in conical friction surface contact. The locking gear meshes with the inner gear ring, so that the inner shaft and the upper drill string rotate in conjunction, thereby realizing the composite drilling of the screw drill and the upper drill string.

4. The intelligent control friction reduction, drag reduction and speed-increasing tool for screw drilling tools according to claim 2 is characterized in that: The intelligent control friction reduction, drag reduction and speed-up tool for screw drilling tools also includes a center tube coaxially connected to the inner shaft, and the center tube concentrically passes through the friction sleeve. The drive component includes a motor reducer assembly fixed to the center tube through a motor fixing frame, a motor drive shaft fixed in the motor fixing frame, a planetary gear mechanism, a rotating shaft and a transmission screw. The motor reducer assembly is connected to the motor drive shaft through a coupling, and the motor drive shaft transmits power to the rotating shaft through the planetary gear mechanism. The rotating shaft drives the transmission screw to drive the friction sleeve to move axially.

5. The intelligent control friction reduction, drag reduction and speed increase tool for screw drilling tools according to claim 4 is characterized in that: The motor reducer assembly is fixed in the motor fixing frame and connected to an external cable via an eight-pin power sealing plug and a five-pin power sealing plug to achieve power input and signal transmission.

6. The intelligent control friction reduction, drag reduction and speed-increasing tool for screw drilling tools according to claim 4 is characterized in that: The planetary gear mechanism includes a sun gear fixed on the center tube, a plurality of planetary gears meshing with the outer circumference of the sun gear, and an internal gear meshing with the outer circumference of each of the planetary gears, wherein the motor reducer assembly drives the motor transmission shaft to rotate, and the motor transmission shaft drives each of the planetary gears to revolve around the sun gear. At the same time, the planetary gears rotate, driving the rotating shaft to rotate, and then driving the transmission screw to rotate. The transmission screw converts the rotational motion into linear motion, pushing the friction sleeve to move axially, and adjusting the friction contact pressure between it and the inner shaft.

7. The intelligent control friction reduction, drag reduction and speed increase tool for screw drilling tools according to claim 6 is characterized in that: The number of the planetary gears is three and they are meshed at equal intervals on the outer periphery of the sun gear and are synchronously driven by the motor transmission shaft. The number of the transmission screws is three and they are respectively connected to the three rotating shafts.

8. The intelligent control friction reduction, drag reduction and speed-increasing tool for screw drilling tools according to claim 6 is characterized in that: The intelligent automatic control system includes: a circuit board protection compartment, an automatic friction reduction and drag reduction circuit located in the circuit board protection compartment, a first wireless signal transmission circuit and a first battery, the circuit protection compartment includes a protection tube, and an upper end of the protection compartment and a lower end of the protection compartment respectively connected to the upper and lower ends of the protection tube, the lower end of the protection compartment is connected to the motor fixing frame, and a high-precision pressure sensor is also installed on the pressure taking hole of the upper end of the protection compartment for receiving a ground pressure control signal.

9. The intelligent control friction reduction, drag reduction and speed increase tool for screw drilling tools according to claim 8 is characterized in that: The circuit board protection compartment is filled with shockproof oil; a motor drive circuit protection cylinder for protecting the motor drive circuit is also fixed on the motor fixing frame, a circuit board bracket for fixing and supporting the motor drive circuit is installed in the motor drive circuit protection cylinder, and packaging glue is filled in the space formed between the motor drive circuit protection cylinder and the circuit board bracket.

10. The intelligent control friction reduction, drag reduction and speed increase tool for screw drilling tools according to claim 8, characterized in that: A circuit board bin is formed on the inner shaft, and the tool face angle measurement system includes: a tool face intelligent monitoring circuit, a second wireless signal transmission circuit and a second battery located in the circuit board bin. The tool face angle measurement system monitors the tool face angle of the screw drill in real time through the tool face intelligent monitoring circuit, and sends data to the intelligent self-control friction and drag reduction circuit through the second wireless signal transmission circuit. The intelligent self-control friction and drag reduction circuit calculates the required friction force adjustment amount according to the deviation between the target tool face angle and the current measured value, and the friction force demand is converted into forward and reverse rotation and speed instructions of the motor reducer assembly to achieve reverse torque balance and tool face adjustment.

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