Moon large-depth in-situ while-drilling reinforcement drilling and cooling drill bit coring device

Abstract

The invention relates to the technical field of rock drilling, and particularly discloses a large-depth in-situ while-drilling reinforcement drilling and cooling drill bit coring device for the moon. Comprising a driving assembly, a drill rod with one end installed in the driving assembly and used in cooperation with the driving assembly, a drill bit, a rock core cylinder and a flow guide assembly which is in transmission fit with the driving assembly and used for controlling a phase change solution stored in the drill bit to enter a conveying flow channel. During use, the flow guide assembly controls the phase change solution to be sprayed to the well wall of a drill hole through an output flow channel which is formed in the drill bit and communicates with the conveying flow channel. Through the effective realization of the positioning mechanism, the top of the drill rod is anchored before use, and the drill rod is coaxially centered relative to a drill hole; by means of the flow guide assembly and the driving assembly, when the drill bit is used for coring, the phase change solution can be evenly sprayed to the periphery of a drill hole by means of the rotation centrifugal force of the drill bit, and therefore the phase change solution can reinforce the drill hole, cool the drill bit and clean rock debris.

Description

Technical Field

[0001] The present invention relates to the technical field of rock drilling, and more particularly to a deep in-situ drilling-while-drilling reinforced drilling and cooling drill bit coring device for the moon. Background Art

[0002] Since the 1960s, humans have conducted a series of lunar exploration activities;

[0003] To date, the Soviet Union's Lunar series, the United States' Apolo series, and China's Chang'e series have obtained relatively rich shallow lunar cores, but have not yet obtained the bedrock deep inside the moon.

[0004] As the strategic goal of countries around the world for the moon has shifted from resource exploration to resource development, and resource development requires information support from the lunar bedrock strata, there is an urgent need to develop lunar deep coring technology; the difficulty in dissipating heat when the drill bit drills into the bedrock in a high vacuum environment and the difficulty in maintaining the hole wall when drilling in the shallow lunar soil layer are two important factors limiting the depth of lunar coring. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a lunar deep in-situ drilling and core-taking device for drilling reinforcement and cooling the drill bit, which can effectively achieve reinforcement drilling, drill bit cooling and chip removal;

[0006] The solution adopted by the present invention to solve the technical problem is:

[0007] A lunar deep-depth in-situ drilling and cooling drill core extraction device comprises a drive assembly, a drill rod with one end mounted in the drive assembly and used in conjunction with the drive assembly, a drill bit mounted at one end of the drill rod away from the drive assembly, a core barrel sleeved in the drill rod and forming a conveying flow channel therebetween, and a flow guide assembly that cooperates with the drive assembly and is used to control a phase change solution stored in the drill bit to enter the conveying flow channel;

[0008] When in use, the flow guide component sprays the phase change solution onto the wall of the borehole through an output flow channel connected to the conveying flow channel arranged on the drill bit; the phase change solution sprayed on the wall of the borehole forms a consolidation layer with high mechanical properties, thereby reinforcing the borehole; under the action of capillary force and gravity, it diffuses and penetrates into the surrounding area, wherein the solvent part undergoes phase change, volatilizes and absorbs heat under vacuum conditions, quickly taking away the heat accumulated in the drill bit, thereby cooling the drill bit; the gas generated after the phase change drives the movement of the cuttings, and finally, under the action of gravity, part of the cuttings falls into the cuttings storage chamber of the corer, thereby realizing self-storage of the cuttings.

[0009] In some possible implementations, in order to effectively implement the installation of the phase change solution and the core barrel;

[0010] The drill rod is provided with an installation cavity 1 for installing a flow guide component and storing a phase change solution, and an installation cavity 2 arranged below the installation cavity 1 and connected with the installation cavity 1; the core barrel is located in the installation cavity 2 and forms a conveying channel with the inner side surface of the installation cavity 2.

[0011] In some possible implementations, in order to effectively realize coring by rotating the drill bit through the drive assembly, and to enable the phase change solution to be sprayed on the wall of the borehole during coring;

[0012] The driving assembly includes a housing coaxially arranged with the drill rod, a slewing mechanism installed in the housing, a feeding mechanism connected with the slewing mechanism and transmission-coordinated, and a positioning mechanism arranged above the slewing mechanism and used for positioning; the feeding mechanism is respectively connected with an end of the drill rod away from the drill bit and a flow guide assembly; the feeding mechanism and the positioning mechanism are located in the housing.

[0013] In some possible implementations, in order to effectively control the flow guide assembly through the feeding mechanism to achieve the phase change solution being sprayed on the borehole wall while drilling while coring;

[0014] The flow guide assembly includes a piston rod installed in the housing and in a T-shaped structure, a top piston sleeved on the outside of the small end of the piston rod and connected to the feeding mechanism, and a bottom piston connected to the end of the small end of the piston rod and cooperating with the top piston and the inner side surface of the installation cavity to form a liquid storage cavity; the bottom piston is arranged on a side close to the core barrel;

[0015] The small end of the piston rod is provided with a liquid inlet channel connected with the liquid storage chamber and the flow channel, and a one-way valve is arranged in the liquid inlet channel.

[0016] In some possible implementations, the large end of the piston rod is disposed between the rotating mechanism and the positioning mechanism, and the small end of the piston rod is coaxially disposed with the housing and sequentially passes through the rotating mechanism, the feeding mechanism, the top piston, and is connected to the bottom piston.

[0017] In some possible implementations, in order to effectively install the diversion assembly and the core barrel;

[0018] A partition is arranged inside the drill bit to divide the inside of the drill bit into a first installation cavity and a second installation cavity. A through hole communicating with a liquid inlet channel and a delivery channel is arranged on the partition. The bottom piston is installed on the partition.

[0019] In some possible implementations, in order to effectively realize self-storage of the cuttings generated during coring;

[0020] A spiral chip removal groove is arranged on the portion of the drill rod extending out of the housing, and a chip storage chamber used in conjunction with the spiral chip removal groove is arranged on the housing.

[0021] In some possible implementations, in order to effectively realize the anchoring of the device and the coaxial arrangement with the drill hole;

[0022] The positioning mechanism comprises a plurality of anchoring members arranged along the radial direction of the drill pipe, and a driving member driving the anchoring members to slide along the radial direction of the drill pipe by performing linear motion along the axial direction of the drill pipe;

[0023] The inner side surfaces of the plurality of anchoring members cooperate to form a receiving cavity coaxial with the drill rod; the driving member, the receiving cavity and the drill rod are coaxially arranged; and a hole for the anchoring member to pass through is arranged on the outer shell.

[0024] In some possible implementations, in order to effectively realize that after coring is completed, the device is removed from the borehole;

[0025] The positioning mechanism also includes an elastic member disposed in the accommodating cavity and respectively connected to the plurality of groups of anchoring members.

[0026] In some possible implementations, in order to simultaneously drive multiple groups of anchoring members to move synchronously through a driving member, the anchoring in the borehole of the present invention is realized;

[0027] The anchoring member comprises a vertical plate connected to the elastic member, and a plurality of groups of claws, one end of which is connected to the vertical plate and arranged at equal intervals along the axial direction of the drill bit;

[0028] When in use, the driving member moves toward one side of the accommodating cavity and drives the claw to pass through the hole and insert into the well wall of the drilled hole.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present invention is effectively realized by the positioning mechanism, the top of the drill rod is anchored before use, and the drill rod is coaxially centered with respect to the borehole; through the flow guide component and the drive assembly, when the drill bit is coring, the phase change solution can borrow the centrifugal force of the drill bit rotation to spray the phase change solution evenly around the borehole, and the phase change solution is self-triggered in a vacuum environment to reinforce the borehole, cool the drill bit, and clean the rock cuttings;

[0031] During coring, the phase change solution diffuses and penetrates to the surroundings under the action of capillary force and gravity. The solvent part undergoes phase change under vacuum conditions, volatilizes and absorbs heat, quickly takes away the heat accumulated in the drill bit, and cools the drill bit. At the same time, the gas generated by the phase change solution after the phase change drives the cuttings to move. Finally, under the action of gravity, part of the cuttings fall into the cuttings storage cavity, and the cuttings are self-stored. The solute part of the phase change solution is bonded with the surrounding lunar soil to form a consolidation layer with high mechanical properties, and the function of drilling reinforcement is realized.

[0032] The present invention can lay a foundation for equipment research on the in-situ physical and mechanical properties of lunar soil and rocks, and the deduction of the lunar evolution history. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the internal structure of the present invention;

[0034] Figure 2 It is a schematic diagram of the structure of the present invention during coring;

[0035] Figure 3 This is a schematic diagram of the structure after coring is completed using the present invention;

[0036] Figure 4 for Figure 1 Sectional view at AA in the middle;

[0037] Figure 5 for Figure 1 Sectional view at the middle BB;

[0038] Figure 6 for Figure 1 Enlarged view of point C in the middle;

[0039] Among them: 1. drill bit; 2. output flow channel; 3. spiral chip groove; 4. sealing petal; 5. core barrel; 6. one-way valve; 7. sealing rubber ring; 8. bottom piston; 9. piston rod; 10. chip storage chamber; 11. phase change solution; 12. top piston; 13. feeding mechanism; 14. rotary mechanism; 15. elastic part; 16. claw; 17. driving part; 18. hanger; 19. cable; 20. drill pipe; 21. coupling; 22. installation chamber 1; 23. core; 24. cuttings; 25. partition. DETAILED DESCRIPTION

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. The "first", "second" and similar words mentioned in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, "one" or "one" and other similar words do not indicate a quantity restriction, but indicate the existence of at least one. In the implementation of this application, "and / or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" refers to two or more. For example, multiple positioning columns refer to two or more positioning columns. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] The present invention is described in detail below.

[0042] The phase change solution 11 in the present invention comprises a solvent and a solute, wherein the solvent is any one or more of ethanol, acetone, tetrahydrofuran, dichloromethane, cyclohexane, carbon tetrachloride, ether, dimethylformamide, n-hexane, isopropanol, and methanol; the solute is any one or more of polyurethane, sodium carboxymethyl cellulose, ethyl cellulose, polyvinyl butyral, phenolic resin, cellulose acetate propionate, cellulose acetate butyrate, polysulfone, and polyvinyl chloride, and the two are mixed and placed in a liquid storage chamber;

[0043] A lunar deep-depth in-situ drilling and cooling drill coring device comprises a drive assembly, a drill rod 20 with one end mounted in the drive assembly and used in conjunction with the drive assembly, a drill bit 1 mounted on the end of the drill rod 20 away from the drive assembly, a core barrel 5 sleeved in the drill rod 20 and forming a conveying flow channel with the drill rod 20, and a flow guide assembly that cooperates with the drive assembly and is used to control a phase change solution 11 stored in the drill bit 1 to enter the conveying flow channel;

[0044] When in use, the flow guide component, driven by the driving assembly, sprays the phase change solution 11 onto the wall of the borehole through the output channel 2 connected to the conveying channel arranged on the drill bit 1; the phase change solution 11 sprayed on the wall of the borehole forms a consolidation layer with high mechanical properties, thereby reinforcing the borehole; under the action of capillary force and gravity, it diffuses and penetrates into the surrounding area, wherein the solvent part undergoes phase change, volatilizes and absorbs heat under vacuum conditions, quickly takes away the heat accumulated in the drill bit 1, thereby cooling the drill bit 1; the gas generated after the phase change drives the cuttings 24 to move, and finally, under the action of gravity, part of the cuttings 24 falls into the corer chip storage chamber 10, thereby realizing self-storage of the cuttings 24.

[0045] In some possible implementations, in order to effectively implement the installation of the phase change solution 11 and the core barrel 5;

[0046] The drill rod 20 is provided with an installation cavity 22 for installing a flow guide assembly and storing a phase change solution 11, and an installation cavity 2 arranged below the installation cavity 22 and connected to the installation cavity 22; the core barrel 5 is located in the installation cavity 2 and forms a conveying channel between the core barrel 5 and the inner side surface of the installation cavity 2.

[0047] The installation cavity 1 22 is arranged on a side close to the driving assembly and located above the installation cavity 2, and the two are coaxially connected; under the drive of the guide component, the phase change solution 11 will enter the delivery channel; after passing through the delivery channel, it will enter the output channel 2.

[0048] In some possible implementations, in order to effectively achieve coring through the rotary feeding of the drill bit 1 by the driving assembly, and to enable the phase change solution 11 to be sprayed on the wall of the borehole while drilling;

[0049] The driving assembly is used to realize the rotation and feeding of the drill pipe 20, the anchoring of the entire device in the borehole, the coaxial centering of the entire device and the borehole, and the driving of the diversion assembly to control the phase change solution 11 to be sprayed onto the wall of the borehole during coring;

[0050] The driving assembly includes a housing coaxially arranged with the drill rod 20, a rotary mechanism 14 installed in the housing, a feeding mechanism 13 connected to the rotary mechanism 14 and in transmission cooperation, and a positioning mechanism arranged above the rotary mechanism 14 and used for positioning; the feeding mechanism 13 is respectively connected to the end of the drill rod 20 away from the drill bit 1 and the guide assembly; the feeding mechanism 13 and the positioning mechanism are located in the housing; the feeding mechanism 13 is located at the bottom of the rotary mechanism 14;

[0051] The rotary mechanism 14 is used to control the rotation of the drill rod 20 around its axis, thereby driving the drill bit 1 to rotate, and cooperates with the feed mechanism 13 to drive the drill rod 20 to move along its axial direction to achieve coring;

[0052] A coupling 21 is mounted on the outer side of the slewing mechanism 14, and the slewing mechanism 14 is connected to the housing through the coupling 21;

[0053] The feeding mechanism 13 is connected to the drill pipe 20 and the diversion assembly respectively so that the phase change solution 11 can be sprayed onto the borehole wall at the same time when coring;

[0054] Furthermore, a hanger 18 is provided on the housing, and before coring, the entire device is hung at the bottom of the borehole by the hanger 18;

[0055] In some possible implementations, in order to effectively control the flow guide assembly through the feeding mechanism 13 to realize the phase change solution 11 being sprayed on the borehole wall while drilling while coring;

[0056] The flow guide assembly includes a piston rod 9 installed in the housing and in a T-shaped structure, a top piston 12 sleeved on the outside of the small end of the piston rod 9 and connected to the feeding mechanism 13, and a bottom piston 8 connected to the end of the small end of the piston rod 9 and cooperating with the top piston 12 and the inner side surface of the installation cavity 22 to form a liquid storage cavity; the bottom piston 8 is arranged on a side close to the core barrel 5;

[0057] The piston rod 9 includes a large end and a small end; the small end of the piston rod 9 is coaxially arranged with the axial direction of the mounting cavity 22; the large end and the small end are perpendicular to each other;

[0058] The small end of the piston rod 9 is provided with a liquid inlet channel connected with the liquid storage chamber and the flow channel, and a one-way valve 6 is provided in the liquid inlet channel;

[0059] Specifically, Figure 6As shown, the liquid inlet channel includes a liquid inlet channel connected to the liquid storage chamber at one end, and a liquid outlet channel connected to the other end of the liquid inlet channel and arranged along the axial direction of the piston rod 9; the liquid outlet channel is connected to the delivery channel; the liquid outlet channel includes a small end connected to the liquid inlet channel, and a large end connected to the small end and the delivery channel, and the one-way valve 6 is installed in the large end and connected to the large end through a spring; when the core is not taken, the feeding mechanism 13 will not apply a force to the top piston 12 to move to one side of the bottom piston 8, and the phase change solution 11 in the liquid storage chamber will not be subjected to pressure, the one-way valve 6 will close the small end, the phase change solution 11 will not enter the delivery channel through the large end, and the phase change solution 11 will be in a self-isolation state;

[0060] When coring, the rotary mechanism 14 rotates, and the feeding mechanism 13 applies a force to the drill rod 20 and the top piston 12. The drill rod 20 and the top piston 12 move along the axis of the piston rod 9 to the side away from the shell, and the piston rod 9 does not move. The differential force generated squeezes the phase change solution 11 in the liquid storage chamber. When the force exerted on the phase change solution 11 plus the self-weight of the one-way valve 6 is greater than the starting pressure, the one-way valve 6 enters the large end and the small end is no longer closed. The phase change solution 11 will be transported from the large end to the transport channel and enter the output channel 2 set in the drill bit 1, and is sprayed on the wellbore wall of the borehole in all directions through the centrifugal force generated by the drill bit 1.

[0061] In some possible implementations, the large end of the piston rod 9 is disposed between the rotary mechanism 14 and the positioning mechanism, and the small end of the piston rod 9 is coaxially disposed with the housing and sequentially passes through the rotary mechanism 14, the feeding mechanism 13, the top piston 12, and is connected to the bottom piston 8;

[0062] Furthermore, the small end of the piston rod 9 is coaxially arranged with the top piston 12 and the bottom piston 8; since the feeding mechanism 13 is sleeved on the outside of the small end of the piston rod 9 and is coaxial, the force applied by the feeding mechanism 13 to the top piston 12 is more uniform;

[0063] Furthermore, sealing rubber rings 7 are respectively arranged on the outer side of the top piston 12 and between the bottom piston 8 and the drill rod 20; the bottom piston 8 is sleeved on the outer side of the small end of the piston rod 9;

[0064] In some possible implementations, in order to effectively install the diversion assembly and the core barrel 5;

[0065] A partition plate 25 is provided in the drill bit 1 to divide the inside of the drill bit 1 into a mounting chamber 1 22 and a mounting chamber 2. A through hole communicating with the liquid inlet channel and the delivery channel is provided on the partition plate 25. The bottom piston 8 is installed on the partition plate 25.

[0066] Specifically, one end of the through hole is connected to the large end of the liquid outlet channel, and the other end is connected to the delivery channel; the through hole and the large end of the liquid outlet channel are coaxially arranged, and the large end of the liquid outlet channel is coaxially arranged with the piston rod 9; the partition 25 is fixedly arranged in the drill bit 1, and the bottom piston 8 is installed on the partition 25, so as to avoid the bottom piston 8 from being displaced along the axial direction of the piston rod 9.

[0067] In some possible implementations, in order to effectively realize the self-storage of the cuttings 24 generated during the coring process;

[0068] A spiral chip removal groove 3 is provided on the portion of the drill rod 20 extending out of the housing, and a chip storage chamber 10 used in conjunction with the spiral chip removal groove 3 is provided on the housing;

[0069] During coring, the drill bit 1 will produce rock cuttings 24, and the gas generated by the phase change solution 11 after the phase change will drive the rock cuttings 24 to move. Finally, under the action of gravity, part of the rock cuttings 24 enters the chip storage chamber 10 through the spiral chip groove 3, realizing self-storage of the rock cuttings 24.

[0070] In some possible implementations, in order to effectively realize the anchoring of the device and the coaxial arrangement with the drill hole;

[0071] The positioning mechanism includes a plurality of anchoring members arranged along the radial direction of the drill rod 20, and a driving member 17 that drives the anchoring members to slide along the radial direction of the drill rod 20 by performing linear motion along the axial direction of the drill rod 20;

[0072] The inner side surfaces of the plurality of anchoring members cooperate to form a receiving cavity coaxial with the drill rod 20; the driving member 17, the receiving cavity and the drill rod 20 are coaxially arranged; a hole for the anchoring member to pass through is arranged on the housing; the driving member 17 is connected to a cable 19;

[0073] Before coring, the entire device is suspended by the hanger 18 and placed at the bottom of the hole. Then the driving member 17 is controlled to move toward the bottom of the hole and enter the accommodating chamber to squeeze the anchors separately so that all anchors pass through the channel and are inserted into the wellbore wall of the borehole. The friction between the anchors and the wellbore wall is fully utilized to realize the dual functions of axial fixation and radial centering (coaxial with the borehole) of the drill pipe 20, thereby fixing the drill pipe 20 in the borehole.

[0074] In some possible implementations, in order to effectively realize that after coring is completed, the device is removed from the borehole;

[0075] The positioning mechanism further includes an elastic member 15 disposed in the accommodating cavity and respectively connected to the plurality of groups of anchoring members;

[0076] After coring is completed, the driving member 17 will move to the side away from the bottom of the hole, the elastic member 15 will recover from the stretched state to the initial state, and the anchor member connected to the driving member 17 will shrink into the shell, and the whole device will no longer be fixed in the borehole. Then, the core 23 and the whole coring device will be lifted to the surface of the borehole by the hanger 18;

[0077] In some possible implementations, in order to simultaneously drive multiple groups of anchoring members to move synchronously through the driving member 17, the anchoring in the borehole of the present invention is realized;

[0078] The anchoring member includes a vertical plate connected to the elastic member 15, and a plurality of groups of claws 16, one end of which is connected to the vertical plate and is arranged at equal intervals along the axial direction of the drill bit 1;

[0079] like Figure 4 As shown, there are four groups of claws 16 and four groups of vertical plates, and the cross section of the vertical plates is an arc surface; when the elastic member 15 is in the initial state, the accommodating cavity formed by the four groups of vertical plates is a cylindrical cavity, the bottom of the driving member 17 is conical, and the small end of the driving member 17 is arranged on a side close to the accommodating cavity;

[0080] When in use, the driving member 17 moves toward one side of the accommodating cavity and drives the claw 16 to pass through the hole and insert into the well wall of the drilled hole.

[0081] It should be noted that a sealing petal 4 is further provided at one end of the core barrel 5 close to the drill bit 1 , and the sealing petal 4 seals the core 23 in the core barrel 5 after coring is completed.

[0082] When coring is performed using the present invention, the specific workflow is as follows:

[0083] Before coring, Figure 1 , Figure 4 , Figure 5 As shown;

[0084] First, the entire device is placed at the bottom of the borehole through the hanger 18, and the driving member 17 is controlled to move toward the bottom of the hole, so that the claw 16 is squeezed by the driving member 17 and inserted into the wall of the borehole, and the drill rod 20 is fixed in the borehole. At this time, the one-way valve 6, under the action of the spring preload, makes the phase change solution 11 stored in the liquid storage chamber in a self-isolating state.

[0085] The state of coring, such as Figure 2 , Figure 4 , Figure 5 As shown:

[0086] When coring, the feed mechanism 13 and the rotary mechanism 14 are turned on to drive the drill rod 20 and the drill bit 1 to rotate and drill, and the core 23 enters the core barrel 5; at the same time, the feed mechanism 13 moves downward toward the bottom of the hole against the rotary mechanism 14, and at the same time, the feed mechanism 13 drives the top piston 12 to move downward toward the bottom of the hole. Since the piston rod 9 does not move and the top piston 12 moves downward, the differential force generated by it will squeeze the phase change solution 11 in the liquid storage chamber;

[0087] When the force exerted on the phase change solution 11 plus the gravity of the one-way valve 6 is greater than the starting pressure, the phase change solution 11 moves along the delivery channel to the output channel 2, and finally the centrifugal force generated by the drill bit 1 driven by the rotary mechanism 14 causes the phase change solution 11 to be sprayed all-roundly onto the wellbore wall.

[0088] Under the high vacuum degree on the moon, the phase change solution 11 undergoes a liquid-to-gas molecular phase change transformation, completing local cooling to extend the life of the drill bit 1; the solute molecules cross-link with the lunar rock and soil on the hole wall to construct a consolidation layer with high mechanical properties, thereby achieving a reinforced drilling function; in addition, when the liquid-to-gas phase change occurs, the gas will drive the rock cuttings 24 in the borehole to spiral upward, and eventually part of the rock cuttings 24 will fall into the chip storage chamber 10 under the action of gravity, completing the effect of automatic chip storage.

[0089] After coring, the status Figure 3 As shown;

[0090] After coring is completed, the sealing petal 4 opens, the bottom of the core 23 is sealed, the driving member 17 moves upward to the side away from the bottom of the hole, and the claw 16 is retracted under the action of the return force of the high-rigidity spring, completing the unlocking of the entire corer, and finally the core 23 and the entire corer are lifted to the surface of the borehole with the help of the hanger 18.

[0091] The present invention is not limited to the above-mentioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A deep lunar in-situ drilling and core-drilling device for strengthening drilling and cooling the drill bit. It is characterized in that The invention comprises a driving assembly, a drill rod with one end installed in the driving assembly and used in conjunction with the driving assembly, a drill bit installed at one end of the drill rod away from the driving assembly, a core barrel sleeved in the drill rod and forming a conveying flow channel therebetween, and a flow guide assembly that cooperates with the driving assembly and is used to control the phase change solution stored in the drill bit to enter the conveying flow channel; When in use, the flow guide component controls the phase change solution to be sprayed onto the wellbore wall of the borehole through an output flow channel provided on the drill bit and communicating with the delivery flow channel.

2. The lunar deep in-situ drilling and cooling drill core sampling device according to claim 1, It is characterized in that The drill rod is provided with an installation cavity 1 for installing a flow guide component and storing a phase change solution, and an installation cavity 2 arranged below the installation cavity 1 and connected with the installation cavity 1; the core barrel is located in the installation cavity 2 and forms a conveying channel with the inner side surface of the installation cavity 2.

3. The lunar deep in-situ drilling and cooling drill coring device according to claim 1, It is characterized in that The driving assembly includes a housing coaxially arranged with the drill rod, a slewing mechanism installed in the housing, a feeding mechanism connected with the slewing mechanism and transmission-coordinated, and a positioning mechanism arranged above the slewing mechanism and used for positioning; the feeding mechanism is respectively connected with an end of the drill rod away from the drill bit and a flow guide assembly; the feeding mechanism and the positioning mechanism are located in the housing.

4. The lunar deep in-situ drilling and cooling drill core sampling device according to claim 3, It is characterized in that The flow guide assembly includes a piston rod installed in the housing and in a T-shaped structure, a top piston sleeved on the outside of the small end of the piston rod and connected to the feeding mechanism, and a bottom piston connected to the end of the small end of the piston rod and cooperating with the top piston and the inner side surface of the installation cavity to form a liquid storage cavity; the bottom piston is arranged on a side close to the core barrel; The small end of the piston rod is provided with a liquid inlet channel connected with the liquid storage chamber and the flow channel, and a one-way valve is arranged in the liquid inlet channel.

5. The lunar deep in-situ drilling and cooling drill core sampling device according to claim 4, It is characterized in that The large end of the piston rod is arranged between the rotary mechanism and the positioning mechanism, and the small end of the piston rod is coaxially arranged with the housing and passes through the rotary mechanism, the feeding mechanism, the top piston in sequence, and is connected with the bottom piston.

6. The lunar deep in-situ drilling and cooling drill core sampling device according to claim 4, It is characterized in that A partition is arranged inside the drill bit to divide the inside of the drill bit into a first installation cavity and a second installation cavity. A through hole communicating with a liquid inlet channel and a delivery channel is arranged on the partition. The bottom piston is installed on the partition.

7. The lunar deep in-situ drilling and cooling drill core sampling device according to claim 3, It is characterized in that A spiral chip removal groove is arranged on the portion of the drill rod extending out of the housing, and a chip storage chamber used in conjunction with the spiral chip removal groove is arranged on the housing.

8. The lunar deep in-situ drilling and cooling drill core sampling device according to claim 3, It is characterized in that The positioning mechanism comprises a plurality of anchoring members arranged along the radial direction of the drill pipe, and a driving member driving the anchoring members to slide along the radial direction of the drill pipe by performing linear motion along the axial direction of the drill pipe; The inner side surfaces of the plurality of anchoring members cooperate to form a receiving cavity coaxial with the drill rod; the driving member, the receiving cavity and the drill rod are coaxially arranged; and a hole for the anchoring member to pass through is arranged on the outer shell.

9. The lunar deep in-situ drilling and cooling drill core sampling device according to claim 8, It is characterized in that The positioning mechanism also includes an elastic member disposed in the accommodating cavity and respectively connected to the plurality of groups of anchoring members.

10. The lunar deep in-situ drilling and cooling drill core sampling device according to claim 8, It is characterized in that The anchoring member comprises a vertical plate connected to the elastic member, and a plurality of groups of claws, one end of which is connected to the vertical plate and arranged at equal intervals along the axial direction of the drill bit; When in use, the driving member moves toward one side of the accommodating cavity and drives the claw to pass through the hole and insert into the well wall of the drilled hole.

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