Intelligent while-drilling drilling system for simulating lunar environment

Abstract

The utility model discloses an intelligent drilling-while-drilling system for simulating the lunar environment, which belongs to the technical field of deep space exploration and comprises a vacuum temperature control integrated device, a lunar soil rock breaking test device, an intelligent drilling-while-drilling device and a data acquisition device which are mutually coordinated and matched. According to the intelligent drilling-while-drilling device and the data acquisition device, the electromagnetic wave measurement-while-drilling technology is innovatively applied to a drilling system, the drill rod has the functions of power transmission and electromagnetic wave transmission, and intelligent drilling is achieved. Besides, on the structure of the drill bit, pit composite coating PDC cutting teeth are innovatively designed, so that the service life of the drill bit for moon drilling is prolonged, and the problem that drilling fluid cannot be used in the moon environment is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to deep space exploration technical field especially is related to a kind of intelligent drilling-in system of drilling while simulating lunar environment. BACKGROUND

[0002] In-depth study lunar formation and evolution mechanism, realize lunar resource effective exploitation and utilization, need to obtain lunar surface layer and deep rock core sample, which puts forward higher requirements to drilling equipment and drilling technology.Drilling while measuring technology (MWD) and logging while drilling technology (LWD) have been widely applied in land oil drilling field.However, there are significant differences between lunar environment and earth, lunar surface extreme environment (ultra-high vacuum, day and night extreme temperature difference etc.) and no liquid medium exists, conventional drilling drilling fluid cannot be used, resulting in lunar drilling working condition extremely complex and harsh, greatly increase lunar drilling difficulty. UTILITY MODEL CONTENT

[0003] To solve the technical problems existing in the prior art lunar drilling, the utility model aims at applying drilling while measuring technology to lunar drilling field, and proposes a kind of intelligent drilling-in system of drilling while simulating lunar environment.

[0004] The utility model discloses a kind of intelligent drilling-in systems while drilling simulating lunar environment, including vacuum temperature control integrated device and lunar soil broken rock test device, the vacuum temperature control integrated device includes vacuum simulation test cabin, for simulating lunar surface ultra-high vacuum and wide temperature range alternating environment;The lunar soil broken rock test device is located in vacuum simulation test cabin;The intelligent drilling-in system while drilling simulating lunar environment further includes intelligent drilling-in device while drilling and data acquisition device;The intelligent drilling-in device while drilling is installed above vacuum simulation test cabin, and its lower part extends to the inside of vacuum simulation test cabin, and the intelligent drilling-in device while drilling includes drilling power drive motor, drill rod and drill bit, the upper end of drill rod is connected drilling power drive motor by coupling, and the lower end of drill rod is connected to drill bit, and drill rod includes coaxially arranged spiral outer tube and inner tube;Drill bit includes drill bit body and crater composite coating PDC cutting tooth arranged at drill bit body cutting end;The surface of crater composite coating PDC cutting tooth is provided with bionic crater and applies solid lubricating coating;The data acquisition device includes while drilling measurement sensor assembly, signal transmitter, insulated nipple, receiver and computer, and while drilling measurement sensor assembly, signal transmitter and insulated nipple are sequentially arranged in the inner tube of drill rod from bottom to top;While drilling measurement sensor assembly is placed in inner tube lower part, near drill bit, can reduce its vibration and impact, improve measurement accuracy;While drilling measurement sensor assembly is integrated with multiple different types of sensors inside, can obtain the key parameters collected by different types of sensors in real time, obtains drilling data;Signal transmitter uses electromagnetic wave transmission technology, and real-time acquisition drilling data is converted and emits electromagnetic wave signal;Insulated nipple has the function of electrical isolation, blocks the disorderly flow of current in drill rod, prevents interference electromagnetic wave signal;The receiver is used for receiving electromagnetic wave signal and demodulating;The computer is communicatively connected with receiver, for processing and analyzing demodulated data.

[0005] Further, the vacuum temperature control integrated device further includes vacuum pump, liquid nitrogen storage bottle, liquid nitrogen refrigeration sandwich and temperature control hot plate, vacuum pump is connected with vacuum simulation test cabin to extract gas in the vacuum simulation test cabin to form vacuum environment;Liquid nitrogen refrigeration sandwich and temperature control hot plate realize the closed-loop control of wide temperature range alternating temperature control.Liquid nitrogen refrigeration sandwich is located at the back of vacuum simulation test cabin, and the bottom of liquid nitrogen refrigeration sandwich is provided with liquid inlet, and the top is provided with exhaust hole;Liquid nitrogen storage bottle is connected with liquid nitrogen refrigeration sandwich, for delivering liquid nitrogen to liquid nitrogen refrigeration sandwich;Temperature control hot plate is attached with temperature sensor, and temperature control hot plate is arranged inside vacuum simulation test cabin, and temperature sensor is connected with computer.

[0006] Further, the solid lubricating coating adopts a molybdenum disulfide coating, a tungsten disulfide coating, a graphene coating, or a composite structure coating of at least two of molybdenum disulfide, tungsten disulfide, and graphene. The bionic pit structure is determined according to the actual reference of the body surface of a ball rolling beetle, and the size parameter range is: pit spacing p = 100-300 μm, pit diameter d = 10-100 μm, and pit depth h = 50-400 μm.

[0007] Further, the outer wall of the spiral outer tube is provided with spiral fins, the height of the spiral fins is 2-4 mm, the width is 3-5 mm, equidistant grooves are formed between the fins, the spiral angle is 15-20°, and the inner wall of the spiral outer tube is smooth. The spiral structure interacts with the lunar soil to effectively disperse the lateral force during drilling, improve the chip removal efficiency, and reduce the risk of sticking.

[0008] Further, the lunar soil rock fragmentation test device includes a lunar soil sample fixing cylinder, a simulated lunar rock sample, and simulated lunar soil material; the simulated lunar rock sample and the simulated lunar soil material are placed in the lunar soil sample fixing cylinder, and the simulated lunar soil material covers the simulated lunar rock sample; a sample clamp is arranged on the lunar soil sample fixing cylinder to ensure that the simulated lunar rock sample and the simulated lunar soil material are clamped and fixed in the lunar soil sample fixing cylinder; the lunar soil sample fixing cylinder is fixed to the bottom of the vacuum simulation test cabin through fastening bolts. The distribution and mechanical properties of the simulated lunar soil material and the simulated lunar rock sample are consistent with the physical property change law of the lunar surface layer from lunar soil to lunar rock. The simulated lunar soil material is relatively soft, the simulated lunar rock sample is hard, and the combination of the two is more consistent with the geological stratification characteristics of the lunar surface layer from soft to hard.

[0009] Further, the vacuum temperature control integrated device, the intelligent drilling while drilling device, and the data acquisition device are arranged on the damping fixing table.

[0010] Further, the damping fixing table includes a rubber damping pad, a steel structure platform, an adjustable supporting leg, and an adjusting nut, the rubber damping pad is laid on the surface of the steel structure platform, the adjustable supporting leg is arranged at the bottom of the steel structure platform and used for adjusting the levelness, the adjustable supporting leg includes a vertically arranged screw rod, and the adjusting nut is threadedly connected with the adjustable supporting leg to adjust the height of the steel structure platform.

[0011] Further, the vacuum simulation test cabin has an upper cabin body and a lower cabin body in a split structure, the vacuum simulation test cabin is buckled through a hinge lock arranged on the connecting side of the upper cabin body and the lower cabin body, a static sealing ring arranged on the abutting surface of the upper cabin body and the lower cabin body is used to ensure the vacuum sealing performance of the vacuum simulation test cabin after buckling, an observation window is arranged on the front surface of the vacuum simulation test cabin, and operation handles are symmetrically arranged on the two sides of the vacuum simulation test cabin.

[0012] Further, the drill rod of the intelligent drilling while drilling device extends to the inside of the vacuum simulation test cabin, and a dynamic sealing ring is arranged at the contact position of the drill rod and the vacuum simulation test cabin.

[0013] Compared with the prior art, the intelligent drilling while drilling system for simulating a lunar environment has the beneficial effects that the vacuum temperature control integrated device is used for simulating lunar extreme working conditions, and can simultaneously realize two functions of vacuum environment and wide-temperature-range alternating (low-temperature to high-temperature interval) temperature control. The intelligent drilling while drilling device and the data acquisition device realize innovative application of electromagnetic wave drilling measurement technology to the drilling system, so that the drill rod has both power transmission and electromagnetic wave transmission functions. The data acquisition device acquires various parameters in drilling in real time, and after being processed by a signal transmitter according to an encoding algorithm, the original signals are transmitted to the outside of the cabin body of the vacuum simulation test cabin in the form of electromagnetic waves, and after being demodulated by a receiver, the original signals are transmitted to a computer for intuitive display. An operator can monitor the drilling state and formation characteristics in real time and comprehensively, optimize drilling procedure parameters, and realize intelligent drilling. In addition, the structure of the drill bit is innovatively designed as a concave composite coating PDC cutting tooth to solve the problem that lunar drilling fluid cannot be used. The bionic concave structure increases the surface roughness to enhance the adhesion of the surface coating and provides space for the coating to store and release. The solid lubricating coating effectively replaces the cooling and lubricating function of the drill bit in the vacuum environment, reduces the heat generated by high friction, greatly prolongs the service life of the drill bit, and effectively improves the drilling efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0015] Figure 1 is a structural diagram of the intelligent drilling while drilling system for simulating a lunar environment provided by the embodiments of the present application.

[0016] Figure 2 is Figure 1 a sectional view of the vacuum simulation test cabin in the middle;

[0017] Figure 3 is Figure 1 a perspective view of the cabin body of the vacuum simulation test cabin in the middle;

[0018] Figure 4 is Figure 3 a structure diagram of the liquid nitrogen refrigeration sandwich in the middle;

[0019] Figure 5 is Figure 1A drilling tool profile in a drilling-while-seeing intelligent drilling device;

[0020] Figure 6 For Figure 5 An enlarged perspective view of a dimple composite coated PDC cutting tooth in the I place;

[0021] Figure 7 For Figure 6 A top view of a bionic dimple structure;

[0022] Figure 8 For Figure 6 A sectional view of a bionic dimple structure.

[0023] The various marks in the drawings are as follows: 1-vacuum temperature control integrated device; 2-drilling-while-seeing intelligent drilling device; 3-lunar soil rock crushing test device; 4-data acquisition device; 5-damping fixed table; 101-vacuum pump; 102-liquid nitrogen storage bottle; 103-vacuum simulation test cabin; 104-liquid nitrogen refrigeration interlayer; 105-dynamic sealing ring; 106-static sealing ring; 107-temperature control heating plate; 108-observation window; 109-operation handle; 110-hinge lock; 1041-liquid inlet; 1042-exhaust hole; 21-drilling power drive motor; 22-guiding support; 23-coupling; 24-drill pipe; 25-drill bit; 241-spiral outer tube; 242-inner tube; 251-drill bit body; 252-dimple composite coated PDC cutting tooth; 2521-solid lubricating coating; 2522-bionic dimple; 31-lunar soil sample fixing cylinder; 32-simulated lunar rock sample; 33-simulated lunar soil material; 311-sample clamp; 41-drilling-while-seeing measurement sensor assembly; 42-signal transmitter; 43-insulating nipple; 44-receiver; 45-computer; 51-rubber damping pad; 52-steel structure platform; 53-adjustable supporting leg; 54-adjusting nut. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the present application, the present application will be further described below in conjunction with the drawings. Those skilled in the art should understand that the specific description below is illustrative rather than limiting, and should not limit the protection scope of the present application. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by those skilled in the art as their usual meanings. In order to avoid obscuring the essence of the present application, well-known methods, processes, procedures, elements and circuits are not described in detail.

[0025] As Figures 1 to 6As shown, the utility model provides a kind of intelligent drilling while drilling system of simulating lunar environment, the system innovatively designs vacuum temperature control integrated device 1, intelligent drilling while drilling device 2 and data acquisition device 4, and constructs out the extreme environment of simulating lunar surface ultrahigh vacuum and wide temperature range alternation.Meanwhile, on the structure of drill bit 25, recess composite coating PDC cutting tooth 252 is innovatively designed, and intelligent drill is designed with electromagnetic wave drilling measurement technology and bionic recess composite solid lubricating coating, can carry out intelligent drilling while drilling under the simulation of lunar environment, provides data support for real-time detection of geological structure parameters in future lunar drilling, potential resource assessment, ensure efficient, accurate and intelligent drilling under the optimal drilling path.

[0026] Specifically, the intelligent drilling while drilling system of simulating lunar environment includes damping fixed platform 5, vacuum temperature control integrated device 1, intelligent drilling while drilling device 2 and data acquisition device 4 are arranged on it.The intelligent drilling while drilling device 2 is installed above the vacuum temperature control integrated device 1, and the lower part extends to the inside of the vacuum temperature control integrated device 1, contacts and cooperates with the built-in lunar soil and rock crushing test device 3.

[0027] The vacuum temperature control integrated device 1 includes vacuum pump 101, liquid nitrogen storage bottle 102, vacuum simulation test cabin 103, liquid nitrogen refrigeration interlayer 104, dynamic sealing ring 105, static sealing ring 106, temperature control hot plate 107, observation window 108, operating handle 109 and hinge lock 110, and the liquid nitrogen refrigeration interlayer 104 is provided with liquid inlet 1041 and exhaust hole 1042.Vacuum pump 101 and liquid nitrogen storage bottle 102 are arranged on damping fixed platform 5, and vacuum pump 101 is fixed on damping fixed platform 5 by fastening bolt, and vacuum pump 101 is connected with vacuum simulation test cabin 103 through corrugated pipe, to realize vacuum environment control.Liquid nitrogen storage bottle 102 is connected with liquid nitrogen refrigeration interlayer 104 arranged on the back of vacuum simulation test cabin 103 through corrugated pipe, and liquid nitrogen enters from the bottom liquid inlet 1041 of liquid nitrogen refrigeration interlayer 104 and is discharged from the top exhaust hole 1042, to realize low-temperature environment control by continuous circulation.Vacuum simulation test cabin 103 is of upper and lower split structure composed of upper cabin body and lower cabin body;the upper part of vacuum simulation test cabin 103 is sealed and connected to the components (drill pipe 24 and cabin body of vacuum simulation test cabin 103) that exist relative motion during drilling by dynamic sealing ring 105.Temperature control hot plate 107 is arranged in vacuum simulation test cabin 103, and temperature sensor is attached to temperature control hot plate 107, to realize temperature regulation from low temperature to high temperature.Observation window 108 is arranged on the front of vacuum simulation test cabin 103, to facilitate visual monitoring during test, and operating handle 109 and hinge lock 110 are symmetrically arranged on both sides, and static sealing ring 106 is arranged between the upper and lower parts of vacuum simulation test cabin 103, to complete the buckling and sealing of vacuum simulation test cabin 103.

[0028] The intelligent drilling while drilling device 2 comprises a drilling power driving motor 21, a guide support 22, a shaft coupling 23, a drill pipe 24 and a drill bit 25; the drill pipe 24 comprises a spiral outer tube 241 and an inner tube 242; the drill bit 25 comprises a drill bit body 251 and a dimple composite coating PDC cutting tooth 252; the dimple composite coating PDC cutting tooth 252 is a composite structure with a solid lubricating coating 2521 and a bionic dimple 2522 formed on the surface. The drilling power driving motor 21 as the power source of the whole device is located at the upper part of the device and is installed on the guide support 22, is connected with the drill pipe 24 through the shaft coupling 23, and the lower end of the drill pipe 24 is connected with the drill bit 25. The drill pipe 24 is designed in combination of the spiral outer tube 241 and the inner tube 242, and the inner tube 242 is integrated with a drilling while measuring sensor assembly 41, a signal transmitter 42 and an insulating short section 43. The lower part of the drill pipe 24 is connected with the drill bit body 251 of the drill bit 25 in a threaded connection manner. The dimple composite coating PDC cutting tooth 252 directly contacts with the lunar soil rock fragmentation test device 3 and performs drilling operation. The dimple composite coating PDC cutting tooth 252 innovatively designs the composite form of the solid lubricating coating 2521 and the bionic dimple 2522 on the basis of the traditional PDC cutting tooth, wherein the solid lubricating coating 2521 adopts a molybdenum disulfide coating, a tungsten disulfide coating, a graphene coating, or a composite coating of at least two materials of molybdenum disulfide, tungsten disulfide and graphene. Figure 7 and Figure 8 As shown in Figs. 7 and 8, according to the actual parameters of the body surface of the scarab, the structure size parameter range of the bionic dimple 2522 is set as follows: a dimple interval p = 100 μm ~ 300 μm, a dimple diameter d = 10 μm ~ 100 μm, and a dimple depth h = 50 μm ~ 400 μm.

[0029] The outer wall of the spiral outer tube 241 is provided with spiral fins, the height of the spiral fins is 2 mm ~ 4 mm, the width is 3 mm ~ 5 mm, equidistant grooves are formed between the fins, the spiral angle is 15° ~ 20°, and the inner wall of the spiral outer tube 241 is smooth. The spiral structure forms interaction with the lunar soil, can effectively disperse the lateral force during drilling, improves the chip removal efficiency, and reduces the risk of sticking.

[0030] The lunar soil rock fragmentation test device 3 comprises a lunar soil sample fixing cylinder 31, a simulated lunar rock sample 32 and a simulated lunar soil material 33; the simulated lunar rock sample 32 and the simulated lunar soil material 33 are respectively placed in the lunar soil sample fixing cylinder 31 from bottom to top. The lunar soil sample fixing cylinder 31 is provided with a sample clamp 311 to ensure that the simulated lunar rock sample 32 and the simulated lunar soil material 33 are clamped and fixed in the lunar soil sample fixing cylinder 31. The lunar soil sample fixing cylinder 31 is fixed to the bottom of the vacuum simulation test cabin 103 through fastening bolts.

[0031] The data acquisition device 4 comprises a measurement-while-drilling sensor assembly 41, a signal transmitter 42, an insulating sub 43, a receiver 44 and a computer 45; the measurement-while-drilling sensor assembly 41, the signal transmitter 42 and the insulating sub 43 are arranged in the inner pipe 242 of the drill pipe 24, and the receiver 44 and the computer 45 are arranged on the damping fixed platform 5. The measurement-while-drilling sensor assembly 41 is arranged at the lower part of the inner pipe 242 near the drill bit 25, so as to reduce the vibration and impact and improve the measurement accuracy. The measurement-while-drilling sensor assembly 41 is internally integrated with multiple different types of sensors, so as to accurately obtain the well trajectory and the geological characteristic parameters in real time and obtain the drilling data. The signal transmitter 42 is arranged above the measurement-while-drilling sensor assembly 41, and the insulating sub 43 is arranged above the signal transmitter 42. The signal transmitter 42 adopts electromagnetic wave transmission technology, collects the drilling data in real time, converts and transmits electromagnetic wave signals, the insulating sub 43 has the electrical isolation effect, blocks the disorderly flow of current in the drill pipe 24, and prevents the interference electromagnetic wave signals. The receiver 44 is used for receiving and demodulating the electromagnetic wave signals. The computer 45 is in communication connection with the receiver 44, and is used for processing and analyzing the demodulated data.

[0032] The damping fixed platform 5 comprises a rubber damping pad 51, a steel structure platform 52, an adjustable supporting leg 53 and an adjusting nut 54; the surface of the steel structure platform 52 is paved with the rubber damping pad 51, and the bottom is provided with the adjustable supporting leg 53 with the adjusting nut 54, so as to ensure the levelness of the damping fixed platform 5 and enable the equipment to stably operate in the horizontal state.

[0033] Further, the adjustable supporting leg 53 comprises a vertically arranged screw rod; the adjusting nut 54 is in threaded cooperation with the adjustable supporting leg 53, and is used for fine adjustment of the height.

[0034] It should be noted that the vacuum pump 101, the temperature-controlled heating plate 107, the drilling power driving motor 21, the measurement-while-drilling sensor assembly 41, the signal transmitter 42, the insulating sub 43, the receiver 44 and the computer 45 all belong to common existing components. The specific structures of the above-mentioned devices for realizing the respective functions have existed in the prior art, and the protocols, software or programs involved in the working process of the devices have also existed in the prior art, and the persons skilled in the art are fully aware of this.

[0035] Working principle and process of the intelligent drilling system while drilling in the simulated lunar environment:

[0036] The utility model provides a kind of drilling intelligent drilling system for simulating lunar environment is used in intelligent drilling under lunar extreme working condition, by designing vacuum temperature control integrated device 1 simulates lunar extreme working condition, the device can simultaneously realize two kinds of functions of vacuum environment and wide temperature range alternation (low temperature to high temperature interval) temperature control.The vacuum environment is by vacuum pump 101 the gas molecules in vacuum simulation test cabin 103 are extracted, and wide temperature range alternation temperature control is the temperature in cabin in real time closed loop control using liquid nitrogen refrigeration interlayer 104 and temperature control heating plate 107 with attached temperature sensor.Low temperature regulation stage, liquid nitrogen vaporization heat absorption refrigeration, liquid nitrogen in liquid nitrogen storage bottle 102 is directed to the liquid inlet 1041 of liquid nitrogen refrigeration interlayer 104 bottom in the back of vacuum simulation test cabin 103 by corrugated pipe.Due to the boiling point of liquid nitrogen is extremely low (at normal pressure, it is-195.8 DEG C), after entering liquid nitrogen refrigeration interlayer 104, it vaporizes rapidly, absorbs a large amount of heat, and then reduces the temperature in liquid nitrogen refrigeration interlayer 104 and vacuum simulation test cabin 103 cabin, and the nitrogen gas after vaporization is discharged from liquid nitrogen refrigeration interlayer 104 through top exhaust hole 1042, while new liquid nitrogen is continuously supplied, realizes continuous low temperature control, forms continuous refrigeration cycle process.High temperature regulation stage, temperature control heating plate 107 works, and the resistance wire in temperature control heating plate 107 generates heat to cause plate body to be heated, so as to increase the temperature in the cabin body of vacuum simulation test cabin 103.The temperature sensor attached to temperature control heating plate 107 transmits temperature signal to computer 45 temperature control system software, and the temperature in the cabin is monitored in real time, to realize the closed loop control of wide temperature range alternation temperature control.

[0037] In addition, the upper surface of the cabin body of vacuum simulation test cabin 103 is provided with a dynamic sealing ring 105 connected with the drill pipe 24, which can effectively prevent external air from entering the cabin body of vacuum simulation test cabin 103, maintain the vacuum degree in the cabin of vacuum simulation test cabin 103, and ensure the stability of the test environment. On the other hand, due to the influence of temperature, pressure and other factors, the drill pipe 24 and the cabin body of vacuum simulation test cabin 103 may expand or deform, and the dynamic sealing ring 105 has elasticity and compensation ability, which can adapt to these size changes and maintain good sealing performance to prevent sealing failure caused by component deformation. The front of the vacuum simulation test cabin 103 is provided with an observation window 108, which can observe the drilling condition of the drill bit 25 in the simulated lunar soil rock breaking test device 3 and the operation condition of the related equipment in real time.

[0038] In order to realize intelligent drilling in the simulated lunar environment, the electromagnetic wave while-drilling measurement technology is innovatively applied to the system, and a while-drilling intelligent drilling device 2 and a data acquisition device 4 are designed. In the while-drilling intelligent drilling device 2, a drilling power driving motor 21 provides power to drive a drill rod 24 to rotate and drive a drill bit 25 to work. The drill bit 25 is driven by the drill rod 24 to implement drilling operation on the simulated lunar rock sample 32 and the simulated lunar soil material 33. The drill rod 24 not only transmits power, but also serves as a carrier for electromagnetic wave transmission. The drill rod 24 is provided with a while-drilling measurement sensor assembly 41, a signal transmitter 42 and an insulating short section 43 in the data acquisition device 4.

[0039] The various types of sensors integrated inside the measurement-while-drilling sensor assembly 41 collect parameters in real time during drilling, which can reflect the drilling state and formation characteristics in the simulated lunar environment in real time, and are connected to the signal transmitter 42, which converts the collected data into high adaptability and anti-interference electrical signals according to the coding algorithm, and further loads them onto a high-frequency carrier. Since the drill pipe 24 is a conductor, and the simulated lunar rock sample 32 and the simulated lunar soil material 33 have certain electrical conductivity and dielectricity, electromagnetic waves will propagate in the drill pipe 24, the simulated lunar rock sample 32 and the simulated lunar soil material 33. During the propagation of the electromagnetic waves, different responses will be generated due to the differences in electrical conductivity and dielectricity between the drill pipe 24, the simulated lunar rock sample 32 and the simulated lunar soil material 33. Places with good electrical conductivity have strong absorption and attenuation effects on electromagnetic waves, and different dielectricity will change the propagation speed and phase of electromagnetic waves. At the same time, when the electromagnetic waves propagate in the drill pipe 24, induced currents will be generated on the surface of the drill pipe 24, which will further excite electromagnetic waves, so that electromagnetic waves can propagate along the drill pipe 24 for a long distance. At the same time, the setting of the insulating nipple 43 can effectively prevent signal leakage to the outside of the drill pipe 24, and ensure stable transmission of the signal inside the drill pipe 24. The receiver 44 converts the changes in the electric field or magnetic field of the electromagnetic waves into electrical signals, which are amplified, filtered and demodulated by the signal processing circuit, and then transmitted to the computer 45. The computer 45 restores the signal to the original measurement data and displays it intuitively. The operator can adjust the drilling procedure parameters according to the real-time data to realize intelligent drilling and achieve the best drilling effect. In order to solve the problem that drilling fluid cannot be used in lunar drilling and improve the service life of the drill bit 25, the drill bit 25 is also innovatively designed. The drill bit 25 involved in the present application is different from the traditional PDC drill bit, and the concave composite coating PDC cutting tooth 252 is innovatively designed. The surface of the concave composite coating PDC cutting tooth 252 is provided with a bionic pit 2522 and coated with a solid lubricating coating 2521. According to the actual parameters of the body surface of the dung beetle, the parameter range of the structure size of the bionic pit 2522 is set, and the solid lubricating coating 2521 is compounded, the solid lubricating coating 2521 adopts a molybdenum disulfide coating, a tungsten disulfide coating, a graphene coating, or a composite coating of at least two of molybdenum disulfide, tungsten disulfide and graphene. The solid lubricating coating 2521 effectively replaces the cooling and lubrication function of the drilling fluid in the vacuum environment, and relies on its excellent thermal stability and self-lubricating properties to reduce the heat generated by high friction. The bionic pit 2522 structure improves the adhesion with the coating by increasing the surface roughness, and provides space for the storage and release of the coating, ensuring that the solid lubricant can continuously play a lubricating and cooling role during long-term and continuous drilling operations. Thus, the service life of the drill bit is greatly prolonged, and the drilling efficiency is effectively improved.

[0040] The moon soil rock fragment testing device 3 in direct contact with the drill bit 25 is designed with a moon soil sample fixing cylinder 31, in which a simulated moon rock sample 32 and a simulated moon soil material 33 are placed to simulate the drilling operation on the moon surface. The simulated moon rock sample 32 is placed on the surface of the moon soil sample fixing cylinder 31 and fixed by a sample clamp 311, and then the simulated moon soil material 33 is laid on the simulated moon rock sample 32. According to the variation law of the physical properties of the moon soil to the moon rock on the moon surface, the actual scene of the moon drilling operation is highly restored.

[0041] It should be understood that the above specific embodiments of the present application are only used for illustrative explanation or principle of the present application, and do not constitute a limitation of the present application. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present application shall be included in the protection scope of the present application. In addition, the appended claims of the present application are intended to cover all variations and modifications falling within the scope and boundary of the appended claims, or the equivalent forms of such scope and boundary.

Claims

1. A drilling-while-drilling system simulating a lunar environment, comprising a vacuum temperature control integrated device (1) and a lunar soil rock crushing test device (3), wherein the vacuum temperature control integrated device (1) comprises a vacuum simulation test cabin (103) for simulating a lunar surface environment; the lunar soil rock crushing test device (3) is arranged in the vacuum simulation test cabin (103); and the drilling-while-drilling system is characterized in that: The intelligent drilling while drilling system further comprises an intelligent drilling while drilling device (2) and a data acquisition device (4); the intelligent drilling while drilling device (2) is installed above the vacuum simulation test cabin (103) and extends to the inside of the vacuum simulation test cabin (103), the intelligent drilling while drilling device (2) comprises a drilling power driving motor (21), a drill pipe (24) and a drill bit (25), the upper end of the drill pipe (24) is connected to the drilling power driving motor (21) through a coupling (23), the lower end of the drill pipe (24) is connected to the drill bit (25), and the drill pipe (24) comprises a spiral outer pipe (241) and an inner pipe (242) arranged coaxially; the drill bit (25) comprises a drill bit body (251) and a dimple composite coating PDC cutting tooth (252) arranged at the cutting end of the drill bit body (251), the surface of the dimple composite coating PDC cutting tooth (252) is provided with a bionic dimple (2522) and coated with a solid lubricating coating (2521); the data acquisition device (4) comprises a drilling while measuring sensor assembly (41), a signal transmitter (42), an insulating short section (43), a receiver (44) and a computer (45), the drilling while measuring sensor assembly (41), the signal transmitter (42) and the insulating short section (43) are sequentially arranged in the inner pipe (242) of the drill pipe (24) from bottom to top, the drilling while measuring sensor assembly (41) is arranged at the lower part of the inner pipe (242) near the drill bit (25), a plurality of different types of sensors are integrated in the drilling while measuring sensor assembly (41) and used for acquiring drilling data; the signal transmitter (42) is used for collecting drilling data in real time and transmitting electromagnetic wave signals after coding; the receiver (44) is used for receiving electromagnetic wave signals and demodulating; and the computer (45) is in communication connection with the receiver (44). ​ 2. The intelligent drilling while drilling system simulating lunar environment according to claim 1, wherein, The vacuum temperature control integrated device (1) further comprises a vacuum pump (101), a liquid nitrogen storage bottle (102), a liquid nitrogen refrigeration layer (104) and a temperature control heating plate (107); the vacuum pump (101) is connected with the vacuum simulation test cabin (103) to extract gas in the vacuum simulation test cabin (103) to form a vacuum environment; the liquid nitrogen refrigeration layer (104) is arranged at the back of the vacuum simulation test cabin (103), the bottom of the liquid nitrogen refrigeration layer (104) is provided with a liquid inlet (1041), and the top of the liquid nitrogen refrigeration layer (104) is provided with an exhaust hole (1042); the liquid nitrogen storage bottle (102) is connected with the liquid nitrogen refrigeration layer (104) and used for delivering liquid nitrogen to the liquid nitrogen refrigeration layer (104); and the temperature control heating plate (107) is arranged in the vacuum simulation test cabin (103), the temperature control heating plate (107) is provided with a temperature sensor, and the temperature sensor is connected with the computer (45).

3. The intelligent drilling while drilling system simulating lunar environment according to claim 1, wherein, The parameter value range of the bionic dimple (2522) is as follows: dimple spacing p=100-300 μm, dimple diameter d=10-100 μm, and dimple depth h=50-400 μm.

4. The intelligent drilling while drilling system simulating lunar environment according to claim 1, wherein, The outer wall of the spiral outer tube (241) is provided with spiral fins, the height of the spiral fins is 2-4 mm, the width of the spiral fins is 3-5 mm, equidistant grooves are formed between the fins, and the spiral angle is 15-20°; the inner wall of the spiral outer tube (241) is smooth.

5. The intelligent drilling while drilling system simulating lunar environment according to claim 1, wherein, The lunar soil rock fragment test device (3) comprises a lunar soil sample fixing cylinder (31), a simulated lunar rock sample (32) and simulated lunar soil material (33); the simulated lunar rock sample (32) and the simulated lunar soil material (33) are placed in the lunar soil sample fixing cylinder (31), and the simulated lunar soil material (33) covers the simulated lunar rock sample (32); a sample clamp (311) is arranged on the lunar soil sample fixing cylinder (31), and the lunar soil sample fixing cylinder (31) is fixed to the bottom of the vacuum simulation test cabin (103) through a fastening bolt.

6. The intelligent drilling while drilling system that simulates a lunar environment of claim 1, wherein, The vacuum temperature control integrated device (1), the intelligent drilling while drilling device (2) and the data acquisition device (4) are all arranged on the damping fixed table (5).

7. The intelligent drilling while drilling system simulating the lunar environment according to claim 6, wherein, The damping fixed table (5) comprises a rubber damping pad (51), a steel structure platform (52), an adjustable supporting leg (53) and an adjusting nut (54), the rubber damping pad (51) is laid on the surface of the steel structure platform (52); the adjustable supporting leg (53) is arranged at the bottom of the steel structure platform (52); the adjustable supporting leg (53) comprises a vertically arranged screw rod; the adjusting nut (54) is in threaded cooperation with the adjustable supporting leg (53).

8. The intelligent drilling while drilling system that simulates a lunar environment of claim 1, wherein, The vacuum simulation test cabin (103) has an upper cabin body and a lower cabin body, and is in a split structure; a hinge lock (110) arranged on the connecting side of the upper cabin body and the lower cabin body is used to realize the clamping of the vacuum simulation test cabin (103); a static sealing ring (106) arranged on the abutting surface of the upper cabin body and the lower cabin body is used to ensure the vacuum sealing performance of the vacuum simulation test cabin (103) after clamping; an observation window (108) is arranged on the front surface of the vacuum simulation test cabin (103); operation handles (109) are symmetrically arranged on the two sides of the vacuum simulation test cabin (103).

9. The intelligent drilling while drilling system that simulates a lunar environment of claim 1, wherein, The drill rod (24) of the intelligent drilling while drilling device (2) extends into the vacuum simulation test cabin (103), and a dynamic sealing ring (105) is arranged at the contact position of the drill rod (24) and the vacuum simulation test cabin (103).

Images