Drilling machine-free self-balancing rotary vibration coupled rock breaking drilling system

Abstract

The present application discloses a drill-free self-balancing rotary vibration coupled rock breaking drilling system, which comprises an inner drill bit driving system, an outer drill bit driving system and a drilling pressure distribution system, etc. The present application solves the control problem of self-balancing torque by driving the inner drill bit and the outer drill bit by two groups of motors to realize self-balancing single rotation and self-balancing double rotation of the inner drill bit and the outer drill bit. The present application improves the drilling efficiency of the drilling system by assisting the double drill bit rotation in rock breaking through ultrasonic vibration. The present application reduces the risk of the reverse eye grinding head being stuck by amplifying the output torque of the motor by multiple times through the reduction gear mechanism. The present application solves the problem of low transmission efficiency of strong current and weak current by canceling the conductive slip ring. The present application has the following advantages: high efficiency of vibration plus rotation drilling, easy self-balancing control of simultaneous rotation of the inner drill bit and the outer drill bit, large rotation torque of the reverse eye grinding head, which is not easy to be stuck, high and stable transmission efficiency of strong current and weak current in the drilling system, and improved reliability and efficiency of drilling.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of drilling and drilling technology, and particularly relates to a drill-free self-balancing rotary vibration drilling system suitable for the technical fields of geological drilling, hydrological well drilling, oil and gas drilling, scientific drilling, drilling for extraterrestrial celestial bodies and underground building rescue, etc. BACKGROUND

[0002] In the development process of the existing drilling (drilling) technology, almost all the technical improvements and innovations are based on the architecture of the existing drilling machine, drill pipe and drilling tool. No matter how the improvements are made, the problems of large consumption of the process of energy transmission of the drilling machine to the drill bit and low drilling efficiency cannot be changed. The root cause is that the back torque generated by the drill bit is driven and balanced by the "long arm jurisdiction" type of the surface drilling machine. The "long arm jurisdiction" is a way that violates the law of nature and is not desirable.

[0003] Therefore, the inventor invented a patent No. 201710082518.8 "a downhole torque self-balancing cable drilling tool system". The invention uses inner and outer double drill bits to reverse rotation to break rock. The stator group and the rotor group of the motor drive the outer drill bit and the inner drill bit, respectively. The drill bit and the power system as a whole realize torque self-balancing, and there is no torque effect on the upper drilling tool, thereby reducing the disturbance to the well wall. The invention integrates the power source, mud circulation system and logging system on the drilling tool. The ground only needs to use the winch equipment to lower the drilling tool to realize normal drilling, tripping and logging while drilling, and get rid of the traditional drilling technology of the large surface drilling machine, thereby improving the energy utilization rate and reducing the drilling cost. When the drill is stuck, the winch pulls up the drilling tool, and the stuck drill bit breaks rock frequently and quickly in forward and reverse directions to realize unblocking. The technology fundamentally solves the harm of the back torque generated by the rotary drilling of the drill string, changes the disturbance intensity of the one-way rock breaking of the drill bit to the surrounding rock, simplifies the ground drilling equipment and the supporting tools and process methods, and realizes the purposes of less accidents in the well, low drilling cost, small energy consumption and high drilling efficiency. However, although the invention has revolutionary progress compared with the traditional drilling tool, there are still some deficiencies in the technology itself that need to be solved urgently, such as low rotary drilling efficiency, difficulty in controlling the torque self-balancing of the inner and outer drill bits at the same time, the stuck drill bit being easily stuck and losing the unblocking effect, large pressure loss in the long-distance transmission of the medium-voltage electric cable, and low and unstable efficiency of the transmission of strong and weak electricity through the conductive slip ring arranged in the drilling tool, which greatly affects the reliability and efficiency of the drilling.

[0004] Therefore, there is an urgent need in the prior art for a new technical solution to solve these problems. SUMMARY

[0005] The purpose of this invention is to address the shortcomings described in the background art by providing a drillless self-balancing rotary vibration coupled rock-breaking drilling system. This system improves drilling efficiency by using vibration-assisted dual-bit rotary rock breaking; it solves the problem of controlling self-balancing torque by using two sets of motors to drive the inner and outer drill bits respectively, achieving self-balancing single and double rotations; it amplifies the motor's output torque multiple times through a reduction gear mechanism, reducing the risk of the drill bit getting stuck; it reduces the problem of high voltage loss over long distances by using high-voltage power input from the ground and a transformer installed inside the drill bit to power the actuators; and it addresses the low efficiency of high-voltage and low-voltage power transmission by eliminating the conductive slip ring.

[0006] To achieve the purpose of the appeal, the present invention proposes the following technical solution:

[0007] The self-balancing rotary vibration coupled rock-breaking drilling system without a drilling rig includes an inner and outer drill bit centering oilless bearing, an inner drill bit rotary lower seal, an inner drill bit lower guide mechanism, an inner drill bit upper guide mechanism, an inner drill bit high-frequency vibrator, an inner drill bit pressure transmission and torsion isolation mechanism, a drilling fluid transition channel shaft, a cable manifold drilling fluid pipe, a cable manifold outer pipe, an outer drill bit pressure transmission and torsion isolation mechanism, an outer drill bit high-frequency vibrator, an inner and outer drill bit motor assembly connector, an inner drill bit rotary motor assembly upper connector, an inner drill bit pressure transmission and torsion isolation mechanism and high-frequency vibrator cavity, a drill pressure distribution circumferential limiter, a drill pressure adjustment and distribution motor upper connector, a drill pressure distribution actuator connector, a drilling fluid circulation pump assembly, drilling electrical components and sensor controller assembly, an inner and outer sheath, a drilling transformer assembly, an outer sheath upper connector, a reamer assembly, a cable manifold fixing connector, a lower limit sensor assembly, an upper limit sensor assembly, an outer sheath lower connector, an inner drill bit drive system, an outer drill bit drive system, and a drill pressure distribution system.

[0008] The internal drill bit drive system includes the internal drill bit, the core cylinder, the internal drill bit drive shaft, and the internal drill bit rotary motor unit;

[0009] The inner drill bit, the inner and outer drill bit straightening oilless bearings, the rock core and the lower end of the inner drill bit drive shaft are fixedly connected in sequence. The rock core cylinder is slidably connected to the outer tube of the outer drill bit through the inner and outer drill bit straightening oilless bearings. The inner drill bit drive shaft passes through the outer drill bit rotary motor unit and is connected to the rotor key of the inner drill bit rotary motor unit.

[0010] The inner drill bit lower guide mechanism comprises an inner drill bit lower guide mechanism upper bearing limiting cover, an inner drill bit lower guide mechanism guide upper bearing, an inner drill bit lower guide mechanism guide sleeve, an inner drill bit lower guide mechanism guide lower bearing and an inner drill bit lower guide mechanism lower bearing limiting cover, the inner drill bit lower guide mechanism upper bearing limiting cover and the inner drill bit lower guide mechanism lower bearing limiting cover are fixedly connected with the inner and outer drill bit motor group connector, the inner ring of the inner drill bit lower guide mechanism upper bearing limiting cover is pressed against the outer ring of the inner drill bit lower guide mechanism guide upper bearing, and the inner ring of the inner drill bit lower guide mechanism lower bearing limiting cover is pressed against the outer ring of the inner drill bit lower guide mechanism guide lower bearing; the upper and lower end faces of the inner drill bit lower guide mechanism guide sleeve are respectively pressed against and fixed with the inner ring of the inner drill bit lower guide mechanism guide upper bearing and the inner ring of the inner drill bit lower guide mechanism guide lower bearing;

[0011] The inner drill bit rotary motor group comprises an inner drill bit rotary motor one, an inner drill bit rotary motor one shell, an inner drill bit rotary motor shell connector, an inner drill bit rotary motor two and an inner drill bit rotary motor two shell, the inner drill bit rotary motor one shell, the inner drill bit rotary motor shell connector and the inner drill bit rotary motor two shell are sequentially fixedly connected; the upper end face of the inner drill bit rotary motor one shell is fixedly connected with the inner drill bit rotary motor group upper connector; the lower end face of the inner drill bit rotary motor two shell is fixedly connected with the inner and outer drill bit motor group connector, the inner drill bit rotary motor one is placed in the inner drill bit rotary motor one shell and is fixedly connected with the inner drill bit rotary motor group upper connector and the inner drill bit rotary motor shell connector; the inner drill bit rotary motor two is placed in the inner drill bit rotary motor two shell and is fixedly connected with the inner drill bit rotary motor shell connector and the inner and outer drill bit motor group connector; the rotor of the inner drill bit rotary motor one and the rotor of the inner drill bit rotary motor two are matched with the inner drill bit transmission shaft sliding key to transmit the torque to the inner drill bit;

[0012] The inner drill bit upper guide mechanism comprises an inner drill bit upper guide mechanism guide upper bearing, an inner drill bit upper guide mechanism guide sleeve, an inner drill bit upper guide mechanism guide lower bearing and an inner drill bit upper guide mechanism lower bearing limiting cover, the upper and lower end faces of the inner drill bit upper guide mechanism guide sleeve are respectively pressed against and fixed with the inner ring of the inner drill bit upper guide mechanism guide upper bearing and the inner ring of the inner drill bit upper guide mechanism guide lower bearing; the outer ring of the inner drill bit upper guide mechanism guide upper bearing is fixedly connected with the lower limiting sensor group lower end; the inner ring of the inner drill bit upper guide mechanism lower bearing limiting cover is fixedly connected with the outer ring of the inner drill bit upper guide mechanism guide lower bearing, and the outer ring of the inner drill bit upper guide mechanism lower bearing limiting cover is fixedly connected with the inner drill bit rotary motor group upper connector;

[0013] The inner drill bit high-frequency vibrator comprises an inner drill bit high-frequency vibrator fixing nut, an inner drill bit high-frequency vibrator upper bearing, an inner drill bit high-frequency vibrator upper cover, a first vibrator, an inner drill bit high-frequency vibrator lower cover and an inner drill bit high-frequency vibrator lower bearing, the inner drill bit high-frequency vibrator fixing nut is in threaded connection with an inner drill bit transmission shaft, outer rings of the inner drill bit high-frequency vibrator upper bearing, the inner drill bit high-frequency vibrator upper cover, the first vibrator, the inner drill bit high-frequency vibrator lower cover and an outer ring of the inner drill bit high-frequency vibrator lower bearing are sequentially matched and compressed to an outer step of the inner drill bit transmission shaft; the inner drill bit high-frequency vibrator upper cover and the inner drill bit high-frequency vibrator lower cover are matched with an inner drill bit transmission pressure isolation torsion mechanism and a high-frequency vibrator cavity sliding key;

[0014] The inner drill bit transmission pressure isolation torsion mechanism comprises an inner drill bit pressure bearing non-rotation shaft, a mechanical seal support, an inner drill bit mechanical seal, an inner drill bit transmission pressure isolation torsion mechanism outer sleeve, an inner drill bit transmission pressure isolation torsion mechanism fixing nut, an inner drill bit transmission pressure isolation torsion mechanism upper bearing, an inner drill bit transmission pressure isolation torsion mechanism guide sleeve, an inner drill bit transmission pressure isolation torsion mechanism lower bearing and an inner drill bit transmission pressure isolation torsion mechanism lower bearing gland, the inner drill bit pressure bearing non-rotation shaft, the mechanical seal support, the inner drill bit transmission pressure isolation torsion mechanism outer sleeve and the inner drill bit transmission pressure isolation torsion mechanism lower bearing gland are sequentially fixedly connected, the mechanical seal support, the inner drill bit transmission pressure isolation torsion mechanism outer sleeve and the inner drill bit transmission pressure isolation torsion mechanism lower bearing gland are matched with a gap between an inner wall of the inner drill bit transmission pressure isolation torsion mechanism and a high-frequency vibrator cavity; the mechanical seal support is sealingly matched and fixed with a static part of the inner drill bit mechanical seal; a rotating part of the inner drill bit mechanical seal is sealingly matched and fixed with an upper end of the inner drill bit transmission shaft; the inner drill bit transmission pressure isolation torsion mechanism fixing nut is in threaded connection with the inner drill bit transmission shaft, the inner drill bit transmission pressure isolation torsion mechanism fixing nut is in gap matching with the inner drill bit transmission pressure isolation torsion mechanism outer sleeve, an outer ring of the inner drill bit transmission pressure isolation torsion mechanism upper bearing is in compression matching with the inner drill bit transmission pressure isolation torsion mechanism outer sleeve, an inner ring of the inner drill bit transmission pressure isolation torsion mechanism upper bearing is sequentially in compression matching with the inner drill bit transmission pressure isolation torsion mechanism guide sleeve and an inner ring of the inner drill bit transmission pressure isolation torsion mechanism lower bearing; an outer ring of the inner drill bit transmission pressure isolation torsion mechanism lower bearing is in compression matching with an inner ring of the inner drill bit transmission pressure isolation torsion mechanism lower bearing gland, a lower end of the inner drill bit transmission pressure isolation torsion mechanism lower bearing gland is fixedly connected with an upper end of a lower limit position sensing group;

[0015] The drilling pressure distribution system comprises a drilling pressure regulating and distributing motor and a drilling pressure distribution execution mechanism.

[0016] The drilling pressure distribution actuator includes a pressure regulating excessive fixed joint, a pressure regulating motor transition joint, a drilling pressure sensor, a drilling pressure distribution actuator pressure transmission and torque isolation upper bearing, a pressure regulating excessive joint centralizing sleeve, a pressure regulating centralizing member, a drilling pressure distribution actuator pressure transmission and torque isolation lower bearing, and a drilling pressure distribution shaft, the pressure regulating excessive fixed joint is fixedly connected with the pressure regulating motor transition joint and the drilling pressure sensor, the upper end of the pressure regulating motor transition joint is fixedly connected with the lower end of the drilling pressure distribution actuator joint, and the lower end of the drilling pressure sensor is fixedly connected with the pressure regulating excessive joint centralizing sleeve; the inner side of the pressure regulating excessive joint centralizing sleeve is interference-fitted with the outer ring of the drilling pressure distribution actuator pressure transmission and torque isolation upper bearing and the outer ring of the drilling pressure distribution actuator pressure transmission and torque isolation lower bearing; the inner ring of the drilling pressure distribution actuator pressure transmission and torque isolation upper bearing, the pressure regulating centralizing member, and the inner ring of the drilling pressure distribution actuator pressure transmission and torque isolation lower bearing are sequentially pressed and fitted; the pressure regulating centralizing member is fixedly connected with the drilling pressure distribution shaft; the outer wall of the drilling pressure distribution shaft is sliding key-fitted with the rotor of the drilling pressure regulating distribution motor, and the inner wall of the drilling pressure distribution shaft is screw thread-fitted with the non-rotating shaft screw of the inner drill bit;

[0017] The upper and lower ends of the drilling pressure regulating distribution motor upper joint are fixedly connected with the pressure regulating motor transition joint and the drilling pressure regulating distribution motor stator respectively, the lower end of the drilling pressure regulating distribution motor is fixedly connected with the inner drill bit pressure transmission and torque isolation mechanism and the high-frequency vibrator cavity through the drilling pressure distribution circumferential limiting piece; the upper and lower ends of the upper limiting sensing group are fixedly connected with the drilling pressure distribution circumferential limiting piece and the inner drill bit non-rotating pressure-bearing shaft respectively;

[0018] The outer drill bit driving system includes an outer drill bit, an outer drill bit outer tube, an outer drill bit variable diameter joint, an outer drill bit pressure transmission and torque isolation mechanism high-frequency vibrator cavity, and an outer drill bit rotating motor group;

[0019] The upper and lower ends of the outer drill bit outer tube are connected with the outer drill bit variable diameter joint and the outer drill bit respectively, and the inner drill bit rotating lower sealing piece is arranged between the inner drill bit transmission shaft and the outer drill bit variable diameter joint;

[0020] The outer drill bit rotary motor set comprises an outer drill bit rotary motor one, an outer drill bit rotary motor one shell, an outer drill bit rotary motor shell joint, an outer drill bit rotary motor two, an outer drill bit rotary motor two shell and an outer drill bit transmission shaft, the outer drill bit rotary motor one shell, the outer drill bit rotary motor shell joint and the outer drill bit rotary motor two shell are sequentially fixedly connected; the outer drill bit rotary motor one shell upper end surface is fixedly connected with an inner and outer drill bit motor set joint; the outer drill bit rotary motor two shell lower end surface is fixedly connected with an outer drill bit transmission pressure isolation torsion mechanism and a high frequency vibrator cavity upper end; the outer drill bit rotary motor one is placed in the outer drill bit rotary motor one shell and is fixed with the inner and outer drill bit motor set joint and the outer drill bit rotary motor shell joint; the outer drill bit rotary motor two is placed in the outer drill bit rotary motor two shell and is fixed with the outer drill bit rotary motor shell joint and the outer drill bit transmission pressure isolation torsion mechanism and the high frequency vibrator cavity; the outer drill bit transmission shaft outer wall is sliding key connected with the rotor of the outer drill bit rotary motor one and the rotor of the outer drill bit rotary motor two, and the outer drill bit transmission shaft inner wall is gap contact matched with the inner drill bit transmission shaft;

[0021] The outer drill bit transmission pressure isolation torsion mechanism comprises an outer drill bit transmission pressure isolation torsion mechanism fixed nut, an outer drill bit transmission pressure isolation torsion mechanism transmission pressure isolation torsion upper bearing, an outer drill bit transmission pressure isolation torsion mechanism guide sleeve, an outer drill bit transmission pressure isolation torsion mechanism transmission pressure isolation torsion lower bearing, an outer drill bit mechanical seal mechanical seal baffle, a mechanical seal gland and a wear-resistant sliding pad, the outer drill bit transmission pressure isolation torsion mechanism fixed nut is threadedly connected with an outer drill bit variable diameter joint, the outer drill bit transmission pressure isolation torsion mechanism transmission pressure isolation torsion upper bearing inner ring, the outer drill bit transmission pressure isolation torsion mechanism guide sleeve, the outer drill bit transmission pressure isolation torsion mechanism transmission pressure isolation torsion lower bearing inner ring, the mechanical seal baffle and the outer drill bit mechanical seal are pressed on the inner step of the mechanical seal gland by the outer drill bit transmission pressure isolation torsion mechanism fixed nut; the outer drill bit transmission pressure isolation torsion mechanism transmission pressure isolation torsion upper bearing outer ring and the outer drill bit transmission pressure isolation torsion mechanism transmission pressure isolation torsion lower bearing outer ring are interference fitted with the inner wall of the outer drill bit transmission pressure isolation torsion mechanism and the high frequency vibrator cavity; the static part of the outer drill bit mechanical seal is sealingly matched with and fixed to the mechanical seal gland, and the rotating part of the outer drill bit mechanical seal is sealingly matched with and fixed to the outer drill bit variable diameter joint; the lower end of the mechanical seal gland is frictionally and rotatably connected with the outer drill bit variable diameter joint through the wear-resistant sliding pad, and the upper end of the mechanical seal gland is fixedly connected with the outer drill bit transmission pressure isolation torsion mechanism and the high frequency vibrator cavity;

[0022] The outer drill bit high-frequency vibrator comprises an outer drill bit vibration spring, an outer drill bit vibrator upper support, an outer drill bit vibrator, an outer drill bit vibrator lower support and a vibration transmission and torque isolation bearing, the upper end of the outer drill bit vibration spring is placed in and tightly fitted with a spring groove of an outer drill bit pressure transmission and torque isolation mechanism and a high-frequency vibrator cavity, the lower end of the outer drill bit vibration spring is placed in and tightly fitted with a spring groove of the outer drill bit vibrator upper support, the lower end of the outer drill bit vibration spring is sequentially abutted against steps arranged in the outer drill bit vibrator upper support, the outer drill bit vibrator, the outer drill bit vibrator lower support, the vibration transmission and torque isolation bearing to the outer drill bit variable diameter joint, the outer ring of the vibration transmission and torque isolation bearing is tightly fitted with the outer drill bit vibrator lower support, and the inner ring of the vibration transmission and torque isolation bearing is interference fitted with the outer drill bit variable diameter joint.

[0023] The drilling fluid circulating pump group comprises an excessive drilling fluid pipe, a vortex blocking joint, a drilling fluid pressure increasing joint, a pressure generating impeller, an impeller seat, a circulating motor transmission shaft centralizing bearing, a circulating motor transmission shaft dynamic-static conversion bearing, a circulating motor one housing, a circulating motor one, a circulating motor transmission shaft dynamic-static conversion upper mechanical seal, a circulating motor transmission shaft dynamic-static conversion lower mechanical seal, a circulating motor transmission shaft, a circulating motor upper joint, a mechanical seal static support and an excessive drilling fluid pipe, the excessive drilling fluid pipe is sealed and fixed with the vortex blocking joint; the vortex blocking joint, the drilling fluid pressure increasing joint, the circulating motor upper joint, the circulating motor one housing and a drilling pressure distribution execution mechanism joint are sequentially fixed and connected; the pressure generating impeller, the impeller seat and the circulating motor transmission shaft are sequentially fixed and connected; the circulating motor transmission shaft is slidably connected with the circulating motor one; the drilling fluid pressure increasing joint is interference fitted with the outer ring of the circulating motor transmission shaft centralizing bearing; the impeller seat is sealed and fixedly connected with the rotating part of the circulating motor transmission shaft dynamic-static conversion upper mechanical seal and the rotating part of the circulating motor transmission shaft dynamic-static conversion lower mechanical seal; the static part of the circulating motor transmission shaft dynamic-static conversion upper mechanical seal is sealed and fixedly connected with the drilling fluid pressure increasing joint; the static part of the circulating motor transmission shaft dynamic-static conversion lower mechanical seal is sealed and fixedly connected with the mechanical seal static support; the inner ring of the circulating motor transmission shaft dynamic-static conversion bearing is interference fitted with the mechanical seal static support, and the outer ring of the circulating motor transmission shaft dynamic-static conversion bearing is interference fitted with the circulating motor transmission shaft.

[0024] The drilling while measuring electrical device element and sensor controller group is a hollow structure, which is placed in the lower part of the inner sheath and the outer sheath and is gap fitted with the inner sheath and the outer sheath.

[0025] The drilling while measuring transformer group is a hollow structure, which is placed in the upper part of the inner sheath and the outer sheath and is gap fitted with the inner sheath and the outer sheath.

[0026] The reverse eyelet group is fixedly connected to the upper end of the outer sheath upper joint.

[0027] The present application has the following beneficial effects:

[0028] The present application provides a drill-free self-balancing rotary vibration coupled rock breaking drilling system, which solves the control problem of self-balancing torque by driving the inner drill bit and the outer drill bit by two groups of motors to realize self-balancing single rotation and self-balancing double rotation of the inner drill bit and the outer drill bit, improves the drilling efficiency of the drilling system by ultrasonic vibration assisted double drill bit rotation to break rock, reduces the risk of the reverse eye grinding head being stuck by amplifying the output torque of the motor by multiple times through the reduction gear mechanism, and solves the problem of low transmission efficiency of strong and weak electricity by canceling the conductive slip ring, and has the following advantages: high efficiency of vibration plus rotation drilling, easy self-balancing control of inner and outer drill bit simultaneous rotation, large reverse eye grinding head rotation torque, high and stable transmission efficiency of strong and weak electricity in the drilling system, and improved drilling reliability and efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a total assembly schematic diagram of the drill-free self-balancing rotary vibration coupled rock breaking drilling system of the present application.

[0030] Figure 2 is a lower guide straightening mechanism schematic diagram of the inner drill bit of the drill-free self-balancing rotary vibration coupled rock breaking drilling system of the present application.

[0031] Figure 3 is an inner drill bit rotation motor group schematic diagram of the drill-free self-balancing rotary vibration coupled rock breaking drilling system of the present application.

[0032] Figure 4 is an inner drill bit guide straightening group schematic diagram of the drill-free self-balancing rotary vibration coupled rock breaking drilling system of the present application.

[0033] Figure 5 is an inner drill bit high-frequency vibrator schematic diagram of the drill-free self-balancing rotary vibration coupled rock breaking drilling system of the present application.

[0034] Figure 6 is an inner drill bit pressure transmission and torque isolation mechanism schematic diagram of the drill-free self-balancing rotary vibration coupled rock breaking drilling system of the present application.

[0035] Figure 7 is a drilling pressure distribution execution mechanism schematic diagram of the drill-free self-balancing rotary vibration coupled rock breaking drilling system of the present application.

[0036] Figure 8 is an outer drill bit pressure transmission and torque isolation mechanism schematic diagram of the drill-free self-balancing rotary vibration coupled rock breaking drilling system of the present application.

[0037] Figure 9 is an outer drill bit rotation motor group schematic diagram of the drill-free self-balancing rotary vibration coupled rock breaking drilling system of the present application.

[0038] Figure 10 is a while-drilling drilling fluid circulating pump group schematic diagram of the drill-free self-balancing rotary vibration coupled rock breaking drilling system of the present application.

[0039] Figure 11 This is a schematic diagram of the reverse reaming group of the self-balancing rotary vibration coupled rock breaking drilling system without a drill rig according to the present invention. Detailed Implementation

[0040] Please see Figures 1 to 11 As shown, the drill bit system is a self-balancing rotary vibration coupled rock-breaking drilling system without a drilling rig. This system includes an inner and outer drill bit centering oilless bearing 2, an inner drill bit rotary lower seal 5, an inner drill bit lower guide mechanism 6, an inner drill bit upper guide mechanism 8, an inner drill bit high-frequency vibrator 9, an inner drill bit pressure transmission and torque isolation mechanism 10, an inner drill bit shaft 11, a drilling fluid transition channel shaft 14, a cable and drilling fluid pipe 15, a cable and outer pipe 16, an outer drill bit pressure transmission and torque isolation mechanism 20, an outer drill bit high-frequency vibrator 21, an inner and outer drill bit motor assembly connector 24, an inner drill bit rotary motor assembly upper connector 25, and an inner drill bit... 26. Head pressure transmission and torsion isolation mechanism and high-frequency vibrator cavity; 27. Drill pressure distribution circumferential limit component; 28. Drill pressure adjustment and distribution motor upper connector; 29. ​​Drill pressure distribution actuator connector; 30. Drilling fluid circulation pump group; 31. Drilling electrical components and sensor controller group; 32. Inner sheath; 33. Outer sheath; 34. Drilling transformer group; 35. Outer sheath upper connector; 36. Reaming group; 37. Cable fixing connector; 38. Lower limit sensor group; 39. Upper limit sensor group; 40. Outer sheath lower connector; 40. Inner drill bit drive system; outer drill bit drive system; and drill pressure distribution system.

[0041] The internal drill bit drive system includes an internal drill bit 1, a core cylinder 3, an internal drill bit drive shaft 4, and an internal drill bit rotary motor unit 7;

[0042] The inner drill bit 1, the inner and outer drill bit straightening oilless bearings 2, the core cylinder 3, and the inner drill bit drive shaft 4 are sequentially and fixedly connected at their lower ends. The core cylinder 3 is connected to the outer tube 18 of the outer drill bit through the inner and outer drill bit straightening oilless bearings 2, forming a sliding fit. The inner drill bit drive shaft 4 passes through the outer drill bit rotary motor unit 23 and is connected to the rotor key of the inner drill bit rotary motor unit 7. The torque generated by the inner drill bit rotary motor unit 7 is transmitted to the inner drill bit 1 through the inner drill bit drive shaft 4, realizing the rock breaking advance of the inner drill bit 1. The inner and outer drill bit straightening oilless bearings 2 ensure that the inner drill bit 1 and the outer drill bit 17 do not interfere with each other when rotating at relatively high speeds.

[0043] The inner drill bit lower guiding mechanism 6 comprises an inner drill bit lower guiding mechanism upper bearing limiting cover 601, an inner drill bit lower guiding mechanism guiding upper bearing 602, an inner drill bit lower guiding mechanism guiding sleeve 603, an inner drill bit lower guiding mechanism guiding lower bearing 604 and an inner drill bit lower guiding mechanism lower bearing limiting cover 605. The inner drill bit lower guiding mechanism upper bearing limiting cover 601 and the inner drill bit lower guiding mechanism lower bearing limiting cover 605 are fixedly connected with the inner and outer drill bit motor set connector 24. The inner ring of the inner drill bit lower guiding mechanism upper bearing limiting cover 601 is pressed against the outer ring of the inner drill bit lower guiding mechanism guiding upper bearing 602. The inner ring of the inner drill bit lower guiding mechanism lower bearing limiting cover 605 is pressed against the outer ring of the inner drill bit lower guiding mechanism guiding lower bearing 604. The upper and lower end faces of the inner drill bit lower guiding mechanism guiding sleeve 603 are respectively pressed against and fixed with the inner ring of the inner drill bit lower guiding mechanism guiding upper bearing 602 and the inner ring of the inner drill bit lower guiding mechanism guiding lower bearing 604.

[0044] The inner drill bit rotary motor set 7 comprises an inner drill bit rotary motor one 701, an inner drill bit rotary motor one shell 702, an inner drill bit rotary motor shell connector 703, an inner drill bit rotary motor two 704 and an inner drill bit rotary motor two shell 705. The inner drill bit rotary motor one shell 702, the inner drill bit rotary motor shell connector 703 and the inner drill bit rotary motor two shell 705 are sequentially fixedly connected. The upper end face of the inner drill bit rotary motor one shell 702 is fixedly connected with the inner drill bit rotary motor set upper connector 25. The lower end face of the inner drill bit rotary motor two shell 705 is fixedly connected with the inner and outer drill bit motor set connector 24. The inner drill bit rotary motor one 701 is placed in the inner drill bit rotary motor one shell 702 and is fixed with the inner drill bit rotary motor set upper connector 25 and the inner drill bit rotary motor shell connector 703 by means of pins. The inner drill bit rotary motor two 704 is placed in the inner drill bit rotary motor two shell 705 and is fixed with the inner drill bit rotary motor shell connector 703 and the inner and outer drill bit motor set connector 24 by means of pins. The rotor of the inner drill bit rotary motor one 701 and the rotor of the inner drill bit rotary motor two 704 are in sliding key cooperation with the inner drill bit transmission shaft 4, so as to transmit torque to the inner drill bit 1.

[0045] The inner drill bit upper guiding mechanism 8 comprises an inner drill bit upper guiding mechanism guiding upper bearing 801, an inner drill bit upper guiding mechanism guiding sleeve 802, an inner drill bit upper guiding mechanism guiding lower bearing 803 and an inner drill bit upper guiding mechanism lower bearing limiting cover 804. The upper and lower end faces of the inner drill bit upper guiding mechanism guiding sleeve 802 are respectively pressed against and fixed with the inner ring of the inner drill bit upper guiding mechanism guiding upper bearing 801 and the inner ring of the inner drill bit upper guiding mechanism guiding lower bearing 803. The outer ring of the inner drill bit upper guiding mechanism guiding upper bearing 801 is fixedly connected with the lower end of the lower limiting sensing group 38. The inner ring of the inner drill bit upper guiding mechanism lower bearing limiting cover 804 is fixedly connected with the outer ring of the inner drill bit upper guiding mechanism guiding lower bearing 803. The outer ring of the inner drill bit upper guiding mechanism lower bearing limiting cover 804 is fixedly connected with the inner drill bit rotary motor set upper connector 25.

[0046] The inner bit high-frequency vibrator 9 comprises an inner bit high-frequency vibrator fixing nut 901, an inner bit high-frequency vibrator upper bearing 902, an inner bit high-frequency vibrator upper cover 903, a first vibrator 904, an inner bit high-frequency vibrator lower cover 905, and an inner bit high-frequency vibrator lower bearing 906. The inner bit high-frequency vibrator fixing nut 901 is threadedly connected with the inner bit transmission shaft 4, and is used to press the inner bit high-frequency vibrator upper bearing 902, the inner bit high-frequency vibrator upper cover 903, the first vibrator 904, the inner bit high-frequency vibrator lower cover 905, and the inner bit high-frequency vibrator lower bearing 906. The outer ring of the inner bit high-frequency vibrator upper bearing 902, the inner bit high-frequency vibrator upper cover 903, the first vibrator 904, the inner bit high-frequency vibrator lower cover 905, and the outer ring of the inner bit high-frequency vibrator lower bearing 906 are sequentially and tightly fitted onto the outer step of the inner bit transmission shaft 4. The inner bit high-frequency vibrator upper cover 903 and the inner bit high-frequency vibrator lower cover 905 are in sliding key fitting with the inner bit transmission pressure isolation torsion mechanism and the high-frequency vibrator cavity 26.

[0047] The inner drill bit pressure transmission and torque isolation mechanism 10 comprises an inner drill bit pressure bearing non-rotating shaft 1001, a mechanical seal support 1002, an inner drill bit mechanical seal 1003, an inner drill bit pressure transmission and torque isolation mechanism outer sleeve 1004, an inner drill bit pressure transmission and torque isolation mechanism fixing nut 1005, an inner drill bit pressure transmission and torque isolation mechanism upper bearing 1006, an inner drill bit pressure transmission and torque isolation mechanism guide sleeve 1007, an inner drill bit pressure transmission and torque isolation mechanism lower bearing 1008, and an inner drill bit pressure transmission and torque isolation mechanism lower bearing gland 1009. The inner drill bit pressure bearing non-rotating shaft 1001, the mechanical seal support 1002, the inner drill bit pressure transmission and torque isolation mechanism outer sleeve 1004, and the inner drill bit pressure transmission and torque isolation mechanism lower bearing gland 1009 are sequentially fixedly connected, and the mechanical seal support 1002, the inner drill bit pressure transmission and torque isolation mechanism outer sleeve 1004, and the inner drill bit pressure transmission and torque isolation mechanism lower bearing gland 1009 are in clearance fit with the inner drill bit pressure transmission and torque isolation mechanism and the inner wall gap of the high-frequency vibrator cavity 26. The mechanical seal support 1002 is in sealing fit and fixed with the static part of the inner drill bit mechanical seal 1003. The rotating part of the inner drill bit mechanical seal 1003 is in sealing fit and fixed with the upper end of the inner drill bit transmission shaft 4. The inner drill bit pressure transmission and torque isolation mechanism fixing nut 1005 is threadedly connected with the inner drill bit transmission shaft 4, clearance fit with the inner drill bit pressure transmission and torque isolation mechanism outer sleeve 1004, and used for pressing the inner drill bit pressure transmission and torque isolation mechanism upper bearing 1006, the inner drill bit pressure transmission and torque isolation mechanism guide sleeve 1007, and the inner drill bit pressure transmission and torque isolation mechanism lower bearing 1008. The outer ring of the inner drill bit pressure transmission and torque isolation mechanism upper bearing 1006 is in pressing fit with the inner drill bit pressure transmission and torque isolation mechanism outer sleeve 1004, and the inner ring of the inner drill bit pressure transmission and torque isolation mechanism upper bearing 1006 is in sequential pressing fit with the inner drill bit pressure transmission and torque isolation mechanism guide sleeve 1007 and the inner ring of the inner drill bit pressure transmission and torque isolation mechanism lower bearing 1008. The outer ring of the inner drill bit pressure transmission and torque isolation mechanism lower bearing 1008 is in pressing fit with the inner ring of the inner drill bit pressure transmission and torque isolation mechanism lower bearing gland 1009, and the lower end of the inner drill bit pressure transmission and torque isolation mechanism lower bearing gland 1009 is fixedly connected with the upper end of the lower limit sensing group 38.

[0048] The drilling pressure distribution system comprises a drilling pressure regulating and distributing motor 12 and a drilling pressure distribution execution mechanism 13.

[0049] The WOB distribution actuator 13 comprises a WOB regulating over-fixed joint 1301, a WOB regulating motor transition joint 1302, a WOB sensor 1303, a WOB distribution actuator pressure transmission and torque isolation upper bearing 1304, a WOB regulating over-fixed joint centralizing sleeve 1305, a WOB regulating centralizing member 1306, a WOB distribution actuator pressure transmission and torque isolation lower bearing 1307, and a WOB distribution shaft 1308. The WOB regulating over-fixed joint 1301 is fixedly connected with the WOB regulating motor transition joint 1302 and the WOB sensor 1303 respectively, and serves to fix the WOB sensor 1303. The upper end of the WOB regulating motor transition joint 1302 is fixedly connected with the lower end of the WOB distribution actuator joint 29. The lower end of the WOB sensor 1303 is fixedly connected with the WOB regulating over-fixed joint centralizing sleeve 1305. The inner side of the WOB regulating over-fixed joint centralizing sleeve 1305 is interference-fitted with the outer rings of the WOB distribution actuator pressure transmission and torque isolation upper bearing 1304 and the WOB distribution actuator pressure transmission and torque isolation lower bearing 1307. The inner rings of the WOB distribution actuator pressure transmission and torque isolation upper bearing 1304, the WOB regulating centralizing member 1306, and the WOB distribution actuator pressure transmission and torque isolation lower bearing 1307 are sequentially press-fitted. The WOB regulating centralizing member 1306 is fixedly connected with the WOB distribution shaft 1308. The outer wall of the WOB distribution shaft 1308 is slidingly keyed with the rotor of the WOB regulating distribution motor 12. The inner wall of the WOB distribution shaft 1308 is threaded with the screw rod of the inner bit pressure-bearing non-rotating shaft 1001, so that the rotary torque of the WOB regulating distribution motor 12 generates an axial pulling and pressing force of the drilling system through the WOB distribution shaft 1308, which is transmitted to the WOB sensor 1303 and recorded for feedback to the detection and control system, thereby providing data support for the control of the drilling system.

[0050] The upper and lower ends of the WOB regulating distribution motor upper joint 28 are fixedly connected with the WOB regulating motor transition joint 1302 and the stator of the WOB regulating distribution motor 12 respectively. The lower end of the WOB regulating distribution motor 12 is fixedly connected with the inner bit pressure transmission and torque isolation mechanism and the high-frequency vibrator cavity 26 through the WOB distribution circumferential limiting member 27. The upper and lower ends of the upper limiting sensor group 39 are fixedly connected with the WOB distribution circumferential limiting member 27 and the inner bit pressure-bearing non-rotating shaft 1001 respectively.

[0051] The outer bit driving system comprises an outer bit 17, an outer bit outer tube 18, an outer bit variable-diameter joint 19, an outer bit pressure transmission and torque isolation mechanism high-frequency vibrator cavity 22, and an outer bit rotary motor group 23.

[0052] The upper and lower ends of the outer bit outer tube 18 are connected with the outer bit variable-diameter joint 19 and the outer bit 17 respectively. The inner bit rotary lower sealing member 5 is arranged between the inner bit transmission shaft 4 and the outer bit variable-diameter joint 19, and serves to seal.

[0053] The outer drill bit rotary motor set 23 comprises an outer drill bit rotary motor one 2301, an outer drill bit rotary motor one shell 2302, an outer drill bit rotary motor shell joint 2303, an outer drill bit rotary motor two 2304, an outer drill bit rotary motor two shell 2305 and an outer drill bit transmission shaft 2306, the outer drill bit rotary motor one shell 2302, the outer drill bit rotary motor shell joint 2303 and the outer drill bit rotary motor two shell 2305 are sequentially fixedly connected; the upper end surface of the outer drill bit rotary motor one shell 2302 is fixedly connected with the inner and outer drill bit motor set joint 24; the lower end surface of the outer drill bit rotary motor two shell 2305 is fixedly connected with the outer drill bit transmission pressure isolation torsion mechanism and the high frequency vibrator cavity 22; the outer drill bit rotary motor one 2301 is placed in the outer drill bit rotary motor one shell 2302, and is fixed with the inner and outer drill bit motor set joint 24 and the outer drill bit rotary motor shell joint 2303 by a pin; the outer drill bit rotary motor two 2304 is placed in the outer drill bit rotary motor two shell 2305, and is fixed with the outer drill bit rotary motor shell joint 2303 and the outer drill bit transmission pressure isolation torsion mechanism and the high frequency vibrator cavity 22 by a pin; the outer wall of the outer drill bit transmission shaft 2306 is connected with the rotors of the outer drill bit rotary motor one 2301 and the outer drill bit rotary motor two 2304 by a sliding key, and the torque from the outer drill bit rotary motor one 2301 and the outer drill bit rotary motor two 2304 is transmitted to the outer drill bit, and the inner wall of the outer drill bit transmission shaft 2306 is in gap contact with the inner drill bit transmission shaft 4;

[0054] The outer drill bit pressure transmission and torque isolation mechanism 20 comprises an outer drill bit pressure transmission and torque isolation mechanism fixing nut 2001, an outer drill bit pressure transmission and torque isolation mechanism pressure transmission and torque isolation upper bearing 2002, an outer drill bit pressure transmission and torque isolation mechanism guide sleeve 2003, an outer drill bit pressure transmission and torque isolation mechanism pressure transmission and torque isolation lower bearing 2004, a mechanical seal baffle 2005, an outer drill bit mechanical seal 2006, a mechanical seal gland 2007, and a wear-resistant sliding pad 2008. The outer drill bit pressure transmission and torque isolation mechanism fixing nut 2001 is threadedly connected with the outer drill bit reducing joint 19. The inner ring of the outer drill bit pressure transmission and torque isolation mechanism pressure transmission and torque isolation upper bearing 2002, the outer drill bit pressure transmission and torque isolation mechanism guide sleeve 2003, the inner ring of the outer drill bit pressure transmission and torque isolation mechanism pressure transmission and torque isolation lower bearing 2004, the mechanical seal baffle 2005, and the outer drill bit mechanical seal 2006 are pressed and combined on the inner step of the mechanical seal gland 2007 by the outer drill bit pressure transmission and torque isolation mechanism fixing nut 2001. The outer ring of the outer drill bit pressure transmission and torque isolation mechanism pressure transmission and torque isolation upper bearing 2002 and the outer ring of the outer drill bit pressure transmission and torque isolation mechanism pressure transmission and torque isolation lower bearing 2004 are interference-fitted with the inner wall of the outer drill bit pressure transmission and torque isolation mechanism and the high-frequency vibrator cavity 22. The stationary part of the outer drill bit mechanical seal 2006 is sealingly fitted and fixed with the mechanical seal gland 2007, and the rotating part of the outer drill bit mechanical seal 2006 is sealingly fitted and fixed with the outer drill bit reducing joint 19. The lower end of the mechanical seal gland 2007 is frictionally and rotatably connected with the outer drill bit reducing joint 19 through the wear-resistant sliding pad 2008, and the upper end of the mechanical seal gland 2007 is fixed with the outer drill bit pressure transmission and torque isolation mechanism and the high-frequency vibrator cavity 22.

[0055] The outer drill bit high-frequency vibrator 21 comprises an outer drill bit vibration spring 2101, an outer drill bit vibrator upper support 2102, an outer drill bit vibrator 2103, an outer drill bit vibrator lower support 2104, and a vibration transmission and torque isolation bearing 2105. The upper end of the outer drill bit vibration spring 2101 is placed in and tightly fitted in the spring groove of the outer drill bit pressure transmission and torque isolation mechanism and the high-frequency vibrator cavity 22. The lower end of the outer drill bit vibration spring 2101 is placed in and tightly fitted in the spring groove of the outer drill bit vibrator upper support 2102. The lower end of the outer drill bit vibration spring 2101 is in turn abutted on the steps arranged in the order of the outer drill bit vibrator upper support 2102, the outer drill bit vibrator 2103, the outer drill bit vibrator lower support 2104, the vibration transmission and torque isolation bearing 2105, and the outer drill bit reducing joint 19. The outer ring of the vibration transmission and torque isolation bearing 2105 is tightly fitted with the outer drill bit vibrator lower support 2104, and the inner ring of the vibration transmission and torque isolation bearing 2105 is interference-fitted with the outer drill bit reducing joint 19.

[0056] The drilling fluid circulation pump set 30 comprises an excessive drilling fluid pipe 3001, a vortex blocking joint 3002, a drilling fluid booster joint 3003, a pressure generating impeller 3004, an impeller seat 3005, a circulation motor transmission shaft centralizing bearing 3006, a circulation motor transmission shaft rotating and stationary conversion bearing 3007, a circulation motor shell 3008, a circulation motor 3009, a circulation motor transmission shaft rotating and stationary conversion upper mechanical seal 3010, a circulation motor transmission shaft rotating and stationary conversion lower mechanical seal 3011, a circulation motor transmission shaft 3012, a circulation motor upper joint 3013, a mechanical seal stationary support 3014, and an excessive drilling fluid pipe 3015. The excessive drilling fluid pipe 3001 is sealingly fixed with the vortex blocking joint 3002. The vortex blocking joint 3002, the drilling fluid booster joint 3003, the circulation motor upper joint 3013, the circulation motor shell 3008, and the drilling pressure distribution actuator joint 29 are sequentially fixedly connected. The pressure generating impeller 3004, the impeller seat 3005, and the circulation motor transmission shaft 3012 are sequentially fixedly connected. The circulation motor transmission shaft 3012 is slidingly connected with the circulation motor 3009, and the rotation speed is transmitted to the pressure generating impeller 3004, so as to upwardly multi-stage suck the drilling fluid in the well. The drilling fluid booster joint 3003 is interference-fitted with the outer ring of the circulation motor transmission shaft centralizing bearing 3006, so as to guide the circulation motor transmission shaft 3012. The impeller seat 3005 is sealingly fixedly connected with the rotating part of the circulation motor transmission shaft rotating and stationary conversion upper mechanical seal 3010 and the rotating part of the circulation motor transmission shaft rotating and stationary conversion lower mechanical seal 3011. The stationary part of the circulation motor transmission shaft rotating and stationary conversion upper mechanical seal 3010 is sealingly fixedly connected with the drilling fluid booster joint 3003. The stationary part of the circulation motor transmission shaft rotating and stationary conversion lower mechanical seal 3011 is sealingly fixedly connected with the mechanical seal stationary support 3014. The inner ring of the circulation motor transmission shaft rotating and stationary conversion bearing 3007 is interference-fitted with the mechanical seal stationary support 3014, and the outer ring of the circulation motor transmission shaft rotating and stationary conversion bearing 3007 is interference-fitted with the circulation motor transmission shaft 3012.

[0057] The number of the drilling fluid circulation pump set 30 is selected according to the actual working environment, and adjacent two groups of the drilling fluid circulation pump set 30 are connected through a circulation motor lower joint 3016.

[0058] The drilling electronics element and sensor controller set 31 is a hollow structure, is placed in the lower part of the inner sheath 32 and the outer sheath 33, and is gap-fitted with the inner sheath 32 and the outer sheath 33.

[0059] The drilling transformer set 34 is a hollow structure, is placed in the upper part of the inner sheath 32 and the outer sheath 33, and is gap-fitted with the inner sheath 32 and the outer sheath 33. The drilling transformer set 34 transforms the high voltage transmitted from the ground into low voltage required by the drilling system, so as to reduce the pressure drop loss of the electric energy in the long-distance transmission.

[0060] Wherein the reverse reaming group 36 includes reverse reaming head 3601, reverse reaming head joint 3602, head dynamic static conversion bearing 3603, reverse reaming righting bearing shell 3604, reverse reaming upper righting bearing 3605, reverse reaming lower righting bearing 3606, drilling fluid overpass shaft seal joint 3607, head torque transmission internal gear 3608, head torque transmission pinion 3609, reverse reaming righting bearing seat 3610 and head rotary motor 3611, the reverse reaming head 3601, reverse reaming head joint 3602, reverse reaming righting bearing shell 3604, head torque transmission internal gear 3608 outer circle fixed connection in turn, reverse reaming head joint 3602 and head dynamic static conversion bearing 3603 outer circle interference fit, reverse reaming righting bearing shell 3604 and reverse reaming upper righting bearing 3605 outer circle and reverse reaming lower righting bearing 3606 outer circle interference fit;The reverse reaming righting bearing seat 3610, drilling fluid overpass shaft seal joint 3607 and cable pipe fixed joint 37 fixed connection in turn, reverse reaming righting bearing seat 3610 and reverse reaming upper righting bearing 3605 inner circle and reverse reaming lower righting bearing 3606 inner circle interference fit;The drilling fluid overpass shaft seal joint 3607 and head dynamic static conversion bearing 3603 inner circle interference fit, the drilling fluid overpass shaft seal joint 3607 and drilling fluid overpass shaft 14 and cable pipe drilling fluid pipe 15 seal sleeve fit;The head rotary motor 3611 is fixed on the outer sheath upper joint 35, the head rotary motor 3611 rotary shaft and head torque transmission pinion 3609 pin key fixed connection, head torque transmission pinion 3609 and head torque transmission internal gear 3608 meshing fit, so that the head rotary motor 3611 passes through head torque transmission pinion 3609 and transmits torque to reverse reaming head 3601, realizes rotary grinding and drilling system upper hole diameter reduction or drop part, completes smooth drilling and tripping function.

[0061] The working principle and process of the application are as follows:

[0062] The inner drill bit drilling process is as follows:

[0063] The drilling system starts from the original state, first, the drilling pressure distribution system works, and appropriate drilling pressure is distributed to the inner drill bit driving system, at this time, most of the weight of the drilling tool is borne by the outer drill bit driving system, then the drilling pressure distribution system is closed, and the inner drill bit driving system is started, since the friction between the inner drill bit 1 and the formation is much smaller than the friction between the outer drill bit 17 and the formation, the inner drill bit 1 starts to rotate to break the rock and drill, with the progress of the rock breaking of the inner drill bit 1, the drilling pressure thereon decreases, when the drilling pressure is lower than the set value, the drilling pressure distribution system is started again to distribute a certain pressure to the inner drill bit 1, so that dynamic self-adaptive adjustment is realized, and the inner drill bit 1 continuously rotates to drill;

[0064] The outer drill bit drilling process is as follows:

[0065] The drilling system starts from the original state, first the WOB distribution system works, appropriate WOB is distributed to the outer bit drive system, at this time most of the weight of the drilling tool is borne by the inner bit drive system, then the WOB distribution system is closed, and the outer bit drive system is started, because the friction between the outer bit 17 and the formation is much smaller than the friction between the inner bit 1 and the formation, the outer bit 17 starts to rotate to break the rock and drill, at the same time, the WOB on the outer bit is reduced, when the WOB is lower than the set value, the WOB distribution system is started again to distribute a certain pressure to the outer bit 17, so as to dynamically and adaptively adjust and realize continuous rotation drilling of the outer bit 17;

[0066] Double-bit drilling process:

[0067] The drilling system starts from the original state, first the WOB distribution system works, appropriate WOB is distributed to the outer bit drive system, at this time most of the weight of the drilling tool is borne by the inner bit drive system, then the WOB distribution system is closed, and the outer bit drive system is started, because the friction between the outer bit 17 and the formation is much smaller than the friction between the inner bit 1 and the formation, the outer bit 17 starts to rotate to break the rock and drill, at the same time, the WOB on the outer bit is reduced, when the WOB is lower than the set value, the WOB distribution system is started again to distribute a certain pressure to the outer bit 17, so as to dynamically and adaptively adjust and realize continuous rotation drilling of the outer bit 17;

[0068] Back reaming process:

[0069] When drilling, when the upper borehole is reduced in diameter, the back reaming group 36 is started, and the back reaming mill 3601 starts to ream and enlarge the upper reduced diameter part, at this time the drilling fluid is continuously circulated, and the generated cuttings are taken away from the drilling tool by the drilling fluid and discharged to the ground.

Claims

1. A system for rock fragmentation by self-balanced rotary vibration coupled drilling without a drilling rig, characterized in that: The inner and outer drill bit righting oil-free bearing (2), the inner drill bit rotary lower sealing element (5), the inner drill bit lower righting mechanism (6), the inner drill bit upper righting mechanism (8), the inner drill bit high-frequency vibrator (9), the inner drill bit pressure transmission and torque isolation mechanism (10), the drilling fluid passage shaft (14), the cable pipe drilling fluid pipe (15), the cable pipe outer pipe (16), the outer drill bit pressure transmission and torque isolation mechanism (20), the outer drill bit high-frequency vibrator (21), the inner and outer drill bit motor set connector (24), the inner drill bit rotary motor set upper connector (25), the inner drill bit pressure transmission and torque isolation mechanism and high-frequency vibrator cavity (26), the drilling pressure distribution circumferential limiting element (27), the drilling pressure distribution motor upper connector (28), the drilling pressure distribution execution mechanism connector (29), the drilling fluid circulation pump set (30), the drilling electrical element and sensor controller set (31), the inner sheath (32), the outer sheath (33), the drilling transformer set (34), the outer sheath upper connector (35), the back reaming set (36), the cable pipe fixing connector (37), the lower limiting sensor set (38), the upper limiting sensor set (39), the outer sheath lower connector (40), the inner drill bit driving system, the outer drill bit driving system and the drilling pressure distribution system; The inner drill bit driving system comprises the inner drill bit (1), the core barrel (3), the inner drill bit transmission shaft (4) and the inner drill bit rotary motor set (7); The inner drill bit (1), the inner and outer drill bit righting oil-free bearing (2), the core barrel (3) and the lower end of the inner drill bit transmission shaft (4) are sequentially fixedly connected; the core barrel (3) is slidably connected with the outer drill bit outer pipe (18) through the inner and outer drill bit righting oil-free bearing (2); and the inner drill bit transmission shaft (4) is connected with the rotor of the inner drill bit rotary motor set (7) through the outer drill bit rotary motor set (23) after passing through the outer drill bit rotary motor set (23). The inner drill bit lower righting mechanism (6) comprises an inner drill bit lower righting mechanism upper bearing limiting cover (601), an inner drill bit lower righting mechanism righting upper bearing (602), an inner drill bit lower righting mechanism righting sleeve (603), an inner drill bit lower righting mechanism righting lower bearing (604) and an inner drill bit lower righting mechanism lower bearing limiting cover (605); the inner drill bit lower righting mechanism upper bearing limiting cover (601) and the inner drill bit lower righting mechanism lower bearing limiting cover (605) are fixedly connected with the inner and outer drill bit motor set connector (24); the inner ring of the inner drill bit lower righting mechanism upper bearing limiting cover (601) is pressed against the outer ring of the inner drill bit lower righting mechanism righting upper bearing (602); and the inner ring of the inner drill bit lower righting mechanism lower bearing limiting cover (605) is pressed against the outer ring of the inner drill bit lower righting mechanism righting lower bearing (604); the upper and lower end faces of the inner drill bit lower righting mechanism righting sleeve (603) are respectively pressed against and fixed with the inner ring of the inner drill bit lower righting mechanism righting upper bearing (602) and the inner ring of the inner drill bit lower righting mechanism righting lower bearing (604). The inner drill bit rotary motor set (7) comprises an inner drill bit rotary motor one (701), an inner drill bit rotary motor one housing (702), an inner drill bit rotary motor housing joint (703), an inner drill bit rotary motor two (704) and an inner drill bit rotary motor two housing (705), and the inner drill bit rotary motor one housing (702), the inner drill bit rotary motor housing joint (703) and the inner drill bit rotary motor two housing (705) are sequentially fixedly connected; the upper end surface of the inner drill bit rotary motor one housing (702) is fixedly connected with the inner drill bit rotary motor set upper joint (25); the lower end surface of the inner drill bit rotary motor two housing (705) is fixedly connected with the inner and outer drill bit motor set joint (24), the inner drill bit rotary motor one (701) is placed in the inner drill bit rotary motor one housing (702) and is fixedly connected with the inner drill bit rotary motor set upper joint (25) and the inner drill bit rotary motor housing joint (703); the inner drill bit rotary motor two (704) is placed in the inner drill bit rotary motor two housing (705) and is fixedly connected with the inner drill bit rotary motor housing joint (703) and the inner and outer drill bit motor set joint (24); the rotor of the inner drill bit rotary motor one (701) and the rotor of the inner drill bit rotary motor two (704) are in sliding key cooperation with the inner drill bit transmission shaft (4), so that the torque is transmitted to the inner drill bit (1); The inner drill bit upper guiding mechanism (8) comprises an inner drill bit upper guiding mechanism guiding upper bearing (801), an inner drill bit upper guiding mechanism guiding sleeve (802), an inner drill bit upper guiding mechanism guiding lower bearing (803) and an inner drill bit upper guiding mechanism lower bearing limiting cover (804), the upper and lower end surfaces of the inner drill bit upper guiding mechanism guiding sleeve (802) are respectively pressed and fixed with the inner ring of the inner drill bit upper guiding mechanism guiding upper bearing (801) and the inner ring of the inner drill bit upper guiding mechanism guiding lower bearing (803); the outer ring of the inner drill bit upper guiding mechanism guiding upper bearing (801) is fixedly connected with the lower end of the lower limiting sensing group (38); the inner ring of the inner drill bit upper guiding mechanism lower bearing limiting cover (804) is fixedly connected with the outer ring of the inner drill bit upper guiding mechanism guiding lower bearing (803), and the outer ring of the inner drill bit upper guiding mechanism lower bearing limiting cover (804) is fixedly connected with the inner drill bit rotary motor set upper joint (25); The inner drill bit high-frequency vibrator (9) comprises an inner drill bit high-frequency vibrator fixing nut (901), an inner drill bit high-frequency vibrator upper bearing (902), an inner drill bit high-frequency vibrator upper cover (903), a first vibrator (904), an inner drill bit high-frequency vibrator lower cover (905), and an inner drill bit high-frequency vibrator lower bearing (906), the inner drill bit high-frequency vibrator fixing nut (901) is threadedly connected with the inner drill bit transmission shaft (4), the outer ring of the inner drill bit high-frequency vibrator upper bearing (902), the inner drill bit high-frequency vibrator upper cover (903), the first vibrator (904), the inner drill bit high-frequency vibrator lower cover (905), and the outer ring of the inner drill bit high-frequency vibrator lower bearing (906) are sequentially and tightly fitted on the outer step of the inner drill bit transmission shaft (4); the inner drill bit high-frequency vibrator upper cover (903) and the inner drill bit high-frequency vibrator lower cover (905) are slidably connected with the inner drill bit transmission pressure isolation torsion mechanism and the high-frequency vibrator cavity (26); The inner drill bit transmission pressure isolation torsion mechanism (10) comprises an inner drill bit pressure-bearing non-rotating shaft (1001), a mechanical seal support (1002), an inner drill bit mechanical seal (1003), an inner drill bit transmission pressure isolation torsion mechanism outer sleeve (1004), an inner drill bit transmission pressure isolation torsion mechanism fixing nut (1005), an inner drill bit transmission pressure isolation torsion mechanism upper bearing (1006), an inner drill bit transmission pressure isolation torsion mechanism guide sleeve (1007), an inner drill bit transmission pressure isolation torsion mechanism lower bearing (1008), and an inner drill bit transmission pressure isolation torsion mechanism lower bearing gland (1009), the inner drill bit pressure-bearing non-rotating shaft (1001), the mechanical seal support (1002), the inner drill bit transmission pressure isolation torsion mechanism outer sleeve (1004), and the inner drill bit transmission pressure isolation torsion mechanism lower bearing gland (1009) are sequentially and fixedly connected, the mechanical seal support (1002), the inner drill bit transmission pressure isolation torsion mechanism outer sleeve (1004), and the inner drill bit transmission pressure isolation torsion mechanism lower bearing gland (1009) are gap-connected with the inner wall of the inner drill bit transmission pressure isolation torsion mechanism and the high-frequency vibrator cavity (26); the mechanical seal support (1002) is sealingly connected with the static part of the inner drill bit mechanical seal (1003) and is fixed; the rotating part of the inner drill bit mechanical seal (1003) is sealingly connected with the upper end of the inner drill bit transmission shaft (4) and is fixed; the inner drill bit transmission pressure isolation torsion mechanism fixing nut (1005) is threadedly connected with the inner drill bit transmission shaft (4), the inner drill bit transmission pressure isolation torsion mechanism fixing nut (1005) is gap-connected with the inner drill bit transmission pressure isolation torsion mechanism outer sleeve (1004), the outer ring of the inner drill bit transmission pressure isolation torsion mechanism upper bearing (1006) is tightly fitted with the inner drill bit transmission pressure isolation torsion mechanism outer sleeve (1004), the inner ring of the inner drill bit transmission pressure isolation torsion mechanism upper bearing (1006) is sequentially and tightly fitted with the inner drill bit transmission pressure isolation torsion mechanism guide sleeve (1007) and the inner ring of the inner drill bit transmission pressure isolation torsion mechanism lower bearing (1008); the outer ring of the inner drill bit transmission pressure isolation torsion mechanism lower bearing (1008) is tightly fitted with the inner ring of the inner drill bit transmission pressure isolation torsion mechanism lower bearing gland (1009), and the lower end of the inner drill bit transmission pressure isolation torsion mechanism lower bearing gland (1009) is fixedly connected with the upper end of the lower limit sensing group (38). The drilling pressure distribution system comprises a drilling pressure regulating distribution motor (12) and a drilling pressure distribution actuator (13); The drilling pressure distribution actuator (13) comprises a pressure regulating over-fixed joint (1301), a pressure regulating motor transition joint (1302), a drilling pressure sensor (1303), a drilling pressure distribution actuator pressure transmission and torque isolation upper bearing (1304), a pressure regulating over-joint centralizing sleeve (1305), a pressure regulating centralizing member (1306), a drilling pressure distribution actuator pressure transmission and torque isolation lower bearing (1307) and a drilling pressure distribution shaft (1308), the pressure regulating over-fixed joint (1301) is fixedly connected with the pressure regulating motor transition joint (1302) and the drilling pressure sensor (1303) respectively, the upper end of the pressure regulating motor transition joint (1302) is fixedly connected with the lower end of the drilling pressure distribution actuator joint (29), the lower end of the drilling pressure sensor (1303) is fixedly connected with the pressure regulating over-joint centralizing sleeve (1305); the inner side of the pressure regulating over-joint centralizing sleeve (1305) is interference-fitted with the outer rings of the drilling pressure distribution actuator pressure transmission and torque isolation upper bearing (1304) and the drilling pressure distribution actuator pressure transmission and torque isolation lower bearing (1307); the inner rings of the drilling pressure distribution actuator pressure transmission and torque isolation upper bearing (1304), the pressure regulating centralizing member (1306) and the drilling pressure distribution actuator pressure transmission and torque isolation lower bearing (1307) are sequentially press-fitted; the pressure regulating centralizing member (1306) is fixedly connected with the drilling pressure distribution shaft (1308); the outer wall of the drilling pressure distribution shaft (1308) is sliding key-fitted with the rotor of the drilling pressure regulating distribution motor (12), and the inner wall of the drilling pressure distribution shaft (1308) is screw-fitted with the inner drill bit pressure-bearing non-rotating shaft (1001); The upper and lower ends of the drilling pressure regulating distribution motor upper joint (28) are fixedly connected with the pressure regulating motor transition joint (1302) and the stator of the drilling pressure regulating distribution motor (12) respectively, the lower end of the drilling pressure regulating distribution motor (12) is fixedly connected with the inner drill bit pressure transmission and torque isolation mechanism and the high-frequency vibrator cavity (26) through the drilling pressure distribution circumferential limiting piece (27); the upper and lower ends of the upper limiting sensing group (39) are fixedly connected with the drilling pressure distribution circumferential limiting piece (27) and the inner drill bit pressure-bearing non-rotating shaft (1001) respectively; The outer drill bit driving system comprises an outer drill bit (17), an outer drill bit outer tube (18), an outer drill bit variable diameter joint (19), an outer drill bit pressure transmission and torque isolation mechanism high-frequency vibrator cavity (22) and an outer drill bit rotating motor group (23); The upper and lower ends of the outer drill bit outer tube (18) are connected with the outer drill bit variable diameter joint (19) and the outer drill bit (17) respectively, and the inner drill bit rotating lower sealing piece (5) is arranged between the inner drill bit transmission shaft (4) and the outer drill bit variable diameter joint (19); The outer drill bit rotary motor set (23) comprises an outer drill bit rotary motor one (2301), an outer drill bit rotary motor one shell (2302), an outer drill bit rotary motor shell joint (2303), an outer drill bit rotary motor two (2304), an outer drill bit rotary motor two shell (2305) and an outer drill bit transmission shaft (2306), the outer drill bit rotary motor one shell (2302), the outer drill bit rotary motor shell joint (2303) and the outer drill bit rotary motor two shell (2305) are sequentially fixedly connected; the upper end surface of the outer drill bit rotary motor one shell (2302) is fixedly connected with the inner and outer drill bit motor set joint (24); the lower end surface of the outer drill bit rotary motor two shell (2305) is fixedly connected with the outer drill bit pressure transmission and torsion isolation mechanism and the high-frequency vibrator cavity (22) upper end; the outer drill bit rotary motor one (2301) is placed in the outer drill bit rotary motor one shell (2302) and is fixed with the inner and outer drill bit motor set joint (24) and the outer drill bit rotary motor shell joint (2303); the outer drill bit rotary motor two (2304) is placed in the outer drill bit rotary motor two shell (2305) and is fixed with the outer drill bit rotary motor shell joint (2303) and the outer drill bit pressure transmission and torsion isolation mechanism and the high-frequency vibrator cavity (22); the outer wall of the outer drill bit transmission shaft (2306) is connected with the rotors of the outer drill bit rotary motor one (2301) and the outer drill bit rotary motor two (2304) through sliding keys, and the inner wall of the outer drill bit transmission shaft (2306) is in gap non-contact type cooperation with the inner drill bit transmission shaft (4); The outer drill bit pressure transmission and torque isolation mechanism (20) comprises an outer drill bit pressure transmission and torque isolation mechanism fixing nut (2001), an outer drill bit pressure transmission and torque isolation mechanism pressure transmission and torque isolation upper bearing (2002), an outer drill bit pressure transmission and torque isolation mechanism guide sleeve (2003), an outer drill bit pressure transmission and torque isolation mechanism pressure transmission and torque isolation lower bearing (2004), a mechanical seal baffle (2005), an outer drill bit mechanical seal (2006), a mechanical seal gland (2007), and a wear-resistant sliding pad (2008). The outer drill bit pressure transmission and torque isolation mechanism fixing nut (2001) is threadedly connected with the outer drill bit reducing joint (19). The inner ring of the outer drill bit pressure transmission and torque isolation mechanism pressure transmission and torque isolation upper bearing (2002), the outer drill bit pressure transmission and torque isolation mechanism guide sleeve (2003), the inner ring of the outer drill bit pressure transmission and torque isolation mechanism pressure transmission and torque isolation lower bearing (2004), the mechanical seal baffle (2005), and the outer drill bit mechanical seal (2006) are pressed and fitted on the inner step of the mechanical seal gland (2007) by the outer drill bit pressure transmission and torque isolation mechanism fixing nut (2001). The outer ring of the outer drill bit pressure transmission and torque isolation mechanism pressure transmission and torque isolation upper bearing (2002) and the outer ring of the outer drill bit pressure transmission and torque isolation mechanism pressure transmission and torque isolation lower bearing (2004) are interference-fitted with the inner wall of the outer drill bit pressure transmission and torque isolation mechanism and high-frequency vibrator cavity (22). The stationary part of the outer drill bit mechanical seal (2006) is sealingly fitted and fixed with the mechanical seal gland (2007), and the rotating part of the outer drill bit mechanical seal (2006) is sealingly fitted and fixed with the outer drill bit reducing joint (19). The lower end of the mechanical seal gland (2007) is frictionally and rotatably connected with the outer drill bit reducing joint (19) through the wear-resistant sliding pad (2008), and the upper end of the mechanical seal gland (2007) is fixed with the outer drill bit pressure transmission and torque isolation mechanism and high-frequency vibrator cavity (22). The outer drill bit high-frequency vibrator (21) comprises an outer drill bit vibration spring (2101), an outer drill bit vibrator upper support (2102), an outer drill bit vibrator (2103), an outer drill bit vibrator lower support (2104), and a vibration transmission and torque isolation bearing (2105). The upper end of the outer drill bit vibration spring (2101) is placed in and tightly fitted in the spring groove of the outer drill bit pressure transmission and torque isolation mechanism and high-frequency vibrator cavity (22). The lower end of the outer drill bit vibration spring (2101) is placed in and tightly fitted in the spring groove of the outer drill bit vibrator upper support (2102). The lower end of the outer drill bit vibration spring (2101) is sequentially abutted on the steps of the tightly fitted outer drill bit vibrator upper support (2102), the outer drill bit vibrator (2103), the outer drill bit vibrator lower support (2104), the vibration transmission and torque isolation bearing (2105), and the outer drill bit reducing joint (19). The outer ring of the vibration transmission and torque isolation bearing (2105) is tightly fitted with the outer drill bit vibrator lower support (2104), and the inner ring of the vibration transmission and torque isolation bearing (2105) is interference-fitted with the outer drill bit reducing joint (19). The drilling fluid circulation pump set (30) comprises an over-drilling fluid pipe (3001), a vortex blocking joint (3002), a drilling fluid booster joint (3003), a pressure generating impeller (3004), an impeller seat (3005), a circulation motor transmission shaft centralizing bearing (3006), a circulation motor transmission shaft rotating and stationary conversion bearing (3007), a circulation motor housing (3008), a circulation motor (3009), a circulation motor transmission shaft rotating and stationary conversion upper mechanical seal (3010), a circulation motor transmission shaft rotating and stationary conversion lower mechanical seal (3011), a circulation motor transmission shaft (3012), a circulation motor upper joint (3013), a mechanical seal stationary support (3014), and an over-drilling fluid pipe (3015), the over-drilling fluid pipe (3001) is sealingly fixed with the vortex blocking joint (3002); the vortex blocking joint (3002), the drilling fluid booster joint (3003), the circulation motor upper joint (3013), the circulation motor housing (3008), and a drilling pressure distribution actuator joint (29) are sequentially fixedly connected; the pressure generating impeller (3004), the impeller seat (3005), and the circulation motor transmission shaft (3012) are sequentially fixedly connected; the circulation motor transmission shaft (3012) is slidingly keyed with the circulation motor (3009); the drilling fluid booster joint (3003) is interference-fitted with the outer ring of the circulation motor transmission shaft centralizing bearing (3006), the impeller seat (3005) is sealingly fixedly fitted with the rotating part of the circulation motor transmission shaft rotating and stationary conversion upper mechanical seal (3010) and the rotating part of the circulation motor transmission shaft rotating and stationary conversion lower mechanical seal (3011); the stationary part of the circulation motor transmission shaft rotating and stationary conversion upper mechanical seal (3010) is sealingly fixedly fitted with the drilling fluid booster joint (3003); the stationary part of the circulation motor transmission shaft rotating and stationary conversion lower mechanical seal (3011) is sealingly fixedly fitted with the mechanical seal stationary support (3014); the inner ring of the circulation motor transmission shaft rotating and stationary conversion bearing (3007) is interference-fitted with the mechanical seal stationary support (3014), and the outer ring of the circulation motor transmission shaft rotating and stationary conversion bearing (3007) is interference-fitted with the circulation motor transmission shaft (3012); The drilling-while-drilling electrical device element and sensor controller set (31) is a hollow structure, placed in the lower part of the inner sheath (32) and the outer sheath (33), and gap-fitted with the inner sheath (32) and the outer sheath (33); The drilling-while-drilling transformer set (34) is a hollow structure, placed in the upper part of the inner sheath (32) and the outer sheath (33), and gap-fitted with the inner sheath (32) and the outer sheath (33); The back eyelet set (36) is fixedly connected to the upper end of the outer sheath upper joint (35).

2. The self-balanced rotary vibration coupling rock fragmentation drill-in system without a drilling machine according to claim 1, characterized in that: The reverse eye group (36) comprises a reverse eye grinding head (3601), a reverse eye grinding head connector (3602), a grinding head dynamic-static conversion bearing (3603), a reverse eye centralizing bearing shell (3604), a reverse eye upper centralizing bearing (3605), a reverse eye lower centralizing bearing (3606), a drilling fluid excessive passage shaft sealing connector (3607), a grinding head torque transmission internal gear (3608), a grinding head torque transmission pinion (3609), a reverse eye centralizing bearing seat (3610) and a grinding head rotary motor (3611), the reverse eye grinding head (3601), the reverse eye grinding head connector (3602), the reverse eye centralizing bearing shell (3604), the grinding head torque transmission internal gear (3608) are sequentially fixedly connected, the reverse eye grinding head connector (3602) is in interference fit with the outer ring of the grinding head dynamic-static conversion bearing (3603), the reverse eye centralizing bearing shell (3604) is in interference fit with the outer rings of the reverse eye upper centralizing bearing (3605) and the reverse eye lower centralizing bearing (3606); the reverse eye centralizing bearing seat (3610), the drilling fluid excessive passage shaft sealing connector (3607) and the cable pipe fixing connector (37) are sequentially fixedly connected, the reverse eye centralizing bearing seat (3610) is in interference fit with the inner rings of the reverse eye upper centralizing bearing (3605) and the reverse eye lower centralizing bearing (3606); the drilling fluid excessive passage shaft sealing connector (3607) is in interference fit with the inner ring of the grinding head dynamic-static conversion bearing (3603), the drilling fluid excessive passage shaft sealing connector (3607) is in sealing sleeve fit with the drilling fluid excessive passage shaft (14) and the cable pipe drilling fluid pipe (15); the grinding head rotary motor (3611) is fixed on the outer sheath upper connector (35), the grinding head rotary motor (3611) rotary shaft is fixedly connected with the grinding head torque transmission pinion (3609), the grinding head torque transmission pinion (3609) is in meshing fit with the grinding head torque transmission internal gear (3608).

3. The self-balanced rotary vibration coupling rock fragmentation drill-in system without a drilling machine according to claim 1, characterized in that: The rotary torque of the drilling pressure regulating and distributing motor (12) generates the axial tension and compression force of the drilling system through the drilling pressure distribution shaft (1308), and is transmitted to the drilling pressure sensor (1303) and recorded for feedback to the detection and control system.

4. The self-balanced rotary vibration coupling rock fragmentation drill-in system without a drilling machine of claim 1, wherein: The adjacent two groups of drilling fluid circulating pumps (30) are connected through the circulating motor lower connector (3016).

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