CN212693299U - Moon-based following protection device while drilling - Google Patents
Moon-based following protection device while drilling Download PDFInfo
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- CN212693299U CN212693299U CN202021638379.6U CN202021638379U CN212693299U CN 212693299 U CN212693299 U CN 212693299U CN 202021638379 U CN202021638379 U CN 202021638379U CN 212693299 U CN212693299 U CN 212693299U
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Abstract
The utility model discloses a moon-based following device while drilling, relating to the technical field of moon exploration and drilling; the device comprises a controller, a corer outer tube and a coring bit positioned below the corer outer tube, wherein a push rod and a rotating mechanism are arranged in the corer outer tube and used for applying torque and axial bit pressure to the coring bit; a following protection mechanism is arranged between the drilling mechanism and the coring bit, and a method of quickly fixing the hole and coupling the cooling bit by using the following protection device while drilling is adopted, so that in the coring process, a following protection liquid arranged in an outer tube of the coring device is discharged into a well through the following protection mechanism and permeates into surrounding rock strata along with the protection liquid to form a hard stable layer; by implementing the technical scheme, the technical problems that the conventional lunar-based coring is easy to cause drill sticking and drill bit damage, and the drill bit temperature is too high due to dry drilling are solved, and the drill sticking can be effectively prevented; meanwhile, the coring bit is cooled in real time, and the lunar-based coring drilling is guaranteed to be smoothly carried out.
Description
Technical Field
The utility model relates to a moon is explored and probing technical field, specifically says, relates to a moon base is along with following device of protecting.
Background
The moon drilling has great strategic significance for human to research the problems of material composition on the surface of the moon, origin of the moon, earth climate, flood phenomena of water areas, future resources and the like. But the prior lunar-based coring has the technical bottleneck of 'not getting deep and not getting true'; the lithology of the lunar rock stratum is loose, a drilling machine is influenced by loose particles in the drilling process, and phenomena such as drill jamming, mechanical disturbance and the like exist, so that the obtained sample is shallow in buried depth and difficult to obtain a deep sample; meanwhile, the drilling machine generates a large amount of heat in the drilling process, so that the drill bit is heated extremely and damaged; meanwhile, under the micro-gravity environment of the moon, the existing drilling device is difficult to overcome the influence of the micro-gravity environment of the moon and apply downward drilling pressure to the moon bed, so that deep lunar rock cannot be drilled.
Thus, in the process of implementing the embodiment of the invention, the inventor finds that the prior month-based coring has the following defects: the existing lunar-based coring only can obtain shallow rock samples and cannot achieve large-depth fidelity coring, which is very disadvantageous for exploring the in-situ physical and mechanical characteristics of the moon, accurately evaluating the potential of moon resources, determining whether water resources exist and state, and obtaining special substances such as volatile gas and the like.
SUMMERY OF THE UTILITY MODEL
In view of the above technical problems, an object of the present invention is to provide a lunar-based while-drilling protection device, which aims to solve the technical problems that the conventional lunar-based coring is prone to causing drill sticking and drill bit damage, and the device enters the surrounding rock stratum along with the penetration of protection liquid during the process of drilling, and is subjected to solidification and cementation with the rock stratum to form a hard stable layer to prevent the drill sticking; meanwhile, a large amount of heat is taken away along with the protective liquid through quick evaporation of the solvent under the vacuum action of the moon, so that the coring bit is cooled in real time, the long-term use of the coring bit is facilitated, and the lunar-based coring drilling is ensured to be carried out smoothly.
The utility model adopts the technical scheme as follows:
a moon-based following protection device while drilling comprises a controller, a corer outer tube and a coring bit positioned below the corer outer tube;
a drilling mechanism is arranged in the outer tube of the coring device, the drilling mechanism comprises a push rod and a rotating mechanism, the push rod and the rotating mechanism are respectively connected with the controller, the push rod is used for applying axial bit pressure to the coring bit, and the rotating mechanism is used for applying torque to the coring bit;
be provided with along with protecting the mechanism between drilling mechanism and the coring bit, just along with protecting mechanism lower extreme and coring bit fixed connection, along with protecting the upper end of mechanism and being connected with drilling mechanism to the messenger is in coring process, arranges the interior along with protecting the liquid of placing in the corer outer tube outside the well through along with protecting the mechanism.
The technical scheme aims at the technical problems that the existing lunar-based coring is easy to cause drill sticking and drill bit damage and has 'not deep coring', researches show that the existing lunar-based coring influences drilling coring due to loose lithology, and also has the defects that a large amount of heat is generated in the drilling process, so that the coring drill bit is extremely heated, and further the drill bit is damaged and destroyed; the technical scheme is that the following protective liquid is applied to the month-based coring, and in the coring process, the following protective liquid arranged in an outer tube of a coring device is discharged to a well by using a following protective mechanism, so that the following protective liquid can permeate into surrounding rock stratums and quickly volatilize along with a solvent in the protective liquid under the vacuum action of the moon to take away heat; on one hand, the solvent is volatilized to take away a large amount of heat, so that the coring bit can be cooled in real time, the long-term use of the coring bit is facilitated, and the smooth drilling is ensured; on the other hand, the solvent is volatilized to leave the polymer in the pores of the rock stratum, and the polymer and the rock stratum are subjected to solidification and cementation to form a hard stable layer, so that the phenomena of sticking of the drill and the like can be prevented, and the lunar-based coring drilling is ensured to be smoothly carried out.
Preferably, the following protection mechanism comprises a following protection cylinder and a piston, the piston is arranged between the drilling mechanism and the following protection cylinder and fixedly connected with the drilling mechanism and the following protection cylinder, and the following protection cylinder and the core bit are integrally connected so that the piston can move downwards under the pushing of the drilling mechanism; and a following protection liquid flow channel is arranged in the following protection cylinder, and a liquid storage cavity for containing the following protection liquid is arranged between the following protection cylinder and the outer tube of the core taking device, so that the following protection liquid arranged in the liquid storage cavity can enter the following protection liquid flow channel in the downward moving process of the piston and is discharged outside through a discharge port arranged on a drill bit of the core taking drill. By adopting the structure, the follow-up protection mechanism provided by the technical scheme has a simple structure and is ingenious in design, and the follow-up protection liquid arranged in the liquid storage cavity can naturally enter the follow-up protection liquid flow channel in the process of applying drilling pressure on the core bit by utilizing the drilling mechanism through the matching design of the piston and the follow-up protection cylinder and is discharged into a well through the discharge port arranged on the core bit without additional power equipment; the protective liquid is discharged to a position close to the core bit in a simple and convenient way.
Preferably, as for the technical scheme, one end of the slave casing, which is close to the piston, is provided with a one-way valve, so that the slave liquid, which is arranged in the liquid storage cavity, can enter the slave liquid flow channel through the one-way valve in the process that the piston moves downwards. Therefore, liquid in the liquid protection flow channel cannot flow back to the liquid storage cavity, and the liquid protection device is favorable for protecting the liquid storage cavity from flowing back.
Preferably, the surface of the core bit is provided with a spiral line, so that the protective solution discharged to the well is uniformly coated on the well wall by the spiral line on the surface of the core bit. By adopting the structure, the polymer phase is left in the loose rock gap to be cemented and quickly solidified, so that the temperature of the drill bit is reduced in real time while the strength of the well wall is improved, and the service life of the drill bit is prolonged.
Preferably, the servo protection liquid comprises a solvent, a polymer and a filler; wherein, preferably, the solvent comprises one or more of methylamine, dimethylamine, diethyl ether, pentane, dichloromethane, carbon disulfide, acetone, chloroform, methanol, tetrahydrofuran, hexane and cyclohexane; preferably, the polymer comprises one or more of cellulose diacetate, cellulose triacetate, cellulose acetate propionate, cellulose nitrate, regenerated cellulose, aromatic polyamide, nylon-66, aromatic polyamide hydrazide, polyphenylsulfone terephthaloyl, polybenzimidazole, polyimide, polysulfone, polyethersulfone, sulfonated polysulfone, polysulfonamide, polyvinyl alcohol, polyvinyl chloride, polyvinylidene fluoride, polycarbonate; further preferably, the filler comprises one or more of a lamellar nanofiller, a fibrous nanofiller or a particulate filler. As a further preference of the technical scheme, the lamellar nanofiller can be boron nitride, montmorillonite graphene, Mxene, layered double hydroxide and the like; the fibrous nano-filler can be cellulose nano-crystal, carbon nano-tube and the like; the granular filler can be nano calcium carbonate, nano zinc oxide, nano ferric oxide, gold granules and silver granules.
Preferably, the upper part of the outer tube of the coring device is internally provided with an inflating mechanism fixedly connected with the outer tube of the coring device, and the inflating mechanism is connected with the controller, so that in the coring process, the controller can control the inflating mechanism to expand along the radial direction of the outer tube of the coring device to extrude the well wall, and the outer tube of the coring device is centered in the radial direction and fixed in the axial direction through the friction force between the inflating mechanism and the well wall. According to the technical scheme, the air inflation mechanism arranged on the upper part of the outer pipe of the coring device expands along the radial direction of the outer pipe of the coring device to extrude the well wall, and the outer pipe of the coring device is centered in the radial direction and fixed axially through the friction force between the air inflation mechanism and the well wall, so that the outer pipe of the coring device and the well wall are firmly fixed; and then the core bit is pushed downwards by the drilling mechanism inside the core taking device so as to apply torque and axial bit pressure to the core bit, so that the bit pressure enough to bite into the lunar rock stratum can be applied to the core bit, the technical problem that the existing drilling device is difficult to apply downward bit pressure to the lunar rock stratum under the low gravity environment of the moon is solved, deep lunar rock is drilled, large-depth fidelity coring is realized, and the drilling efficiency and the stability of the drilling device are greatly improved.
The inflation mechanism comprises an air storage cylinder and an inflation expansion ring, wherein nitrogen or inert gas is filled in the air storage cylinder and is communicated with the inflation expansion ring through a controller, so that the nitrogen or the inert gas in the air storage cylinder can be controlled to be discharged into the inflation expansion ring through the controller. After the drilling device is put down to the well bottom, the valve between the air storage cylinder and the inflation expansion ring can be controlled to be opened through the controller, so that nitrogen or inert gas in the air storage cylinder is discharged into the inflation expansion ring, the inflation expansion ring extrudes the well wall of the solidified layer after expanding along the outer pipe of the coring device in the radial direction, the outer pipe of the coring device is centered in the radial direction and fixed in the axial direction through the friction force between the inflation expansion ring and the well wall, and the structure is simple in design but ingenious and reasonable; preferably, the inflatable ring can be made of silicon rubber, fluororubber or the like, which has good ductility and is resistant to high and low temperature and radiation cosmic rays.
Preferably, a coring inner cylinder is arranged in the coring bit, and the top of the coring inner cylinder is connected with a bearing, so that the coring inner cylinder is connected with the coring bit through the bearing; coring the inner tube bottom and being provided with the rock core sealer, just be equipped with the viscoelastic body of self-healing in coring the inner tube to the messenger is coring the in-process, the viscoelastic body of self-healing can along coring the annular gap motion between inner tube and the rock core, to cover the parcel and bore the surface of getting the rock core. By adopting the structure, the core can be effectively prevented from rotating along with the core bit, and the core drilling is protected; the technical scheme provides that a self-healing viscoelastic body is adopted for quality guarantee coring in lunar-based coring, when a rock core enters a coring sleeve, the rock core is in contact with the self-healing viscoelastic body, the self-healing viscoelastic body deforms under the action of upward force of the rock core and moves along an annular gap between a coring inner cylinder and the rock core to gradually wrap the rock core, and under the constraint of a rock core sealer at the bottom of the coring sleeve, the self-healing viscoelastic body reversibly bonds at the bottom of the rock core through molecular dynamic bonds to generate self-healing action so as to form a quality guarantee sealing film around the drilled rock core by utilizing chemical sealing, thereby realizing complete wrapping and quality guarantee coring of the rock core.
Preferably, a hanger and a cable are arranged on the top of the outer tube of the coring device for placing the drilling device at the moon position of the drilled well.
As described above, the present invention has at least the following advantages over the prior art:
1. the moon-based while-drilling following protection device is provided with a following protection mechanism between a drilling mechanism and a core bit, adopts the following protection liquid applied in the moon-based coring, can rapidly permeate into surrounding rock strata along with the protection liquid, rapidly volatilizes along with the solvent in the protection liquid under the action of vacuum, and takes away heat; on one hand, the solvent is volatilized to take away a large amount of heat, so that the coring bit is cooled in real time, the long-term use of the coring bit is facilitated, and the smooth drilling is ensured; on the other hand, the solvent is volatilized to leave the polymer in the pores of the rock stratum, and the polymer and the rock stratum are subjected to solidification and cementation to form a hard and stable layer, so that the phenomena of drill sticking and the like are prevented, the lunar base coring is ensured to be smoothly carried out, and the technical problem that the conventional lunar base coring is not deep is solved.
2. The following protection mechanism of the utility model has simple structure and ingenious design, and the following protection liquid which is placed in the liquid storage cavity can naturally enter the following protection liquid flow channel in the process of applying the drilling pressure to the core bit by utilizing the drilling mechanism through the matching design of the piston and the following protection cylinder and is discharged into the well through the discharge port arranged on the core bit without additional power equipment; will be discharged to the position that is close to coring bit along with protecting the liquid with simple convenient mode, guarantee that the month base is got the core and is gone on smoothly.
3. The protective solution of the utility model comprises a solvent, a polymer and a filler, is firstly proposed to be applied to the existing lunar-based coring, and the solvent in the protective solution is a low boiling point solvent, so that the protective solution can be quickly volatilized under low-temperature vacuum to take away a large amount of heat; wherein the polymer component is left and is cemented and solidified in the pores of the rock core to form a stable layer for stabilizing the pore wall; the filler can improve the cured cementation between the polymer and the rock stratum and the strength of the cured layer; the solvent, the polymer and the filler in the utility model all play a role respectively and are beneficial components.
4. The utility model discloses when the configuration is along with protecting the mechanism, at the mechanism of aerifing of corer outer tube upper portion configuration, through the mechanism of aerifing along the radial expansion of corer outer tube and extrude the wall of a well, and make the corer outer tube radially centre and axial fixity through the frictional force between the two, and then make corer outer tube and the wall of a well firm fixed, rethread corer inside drilling mechanism promotes the coring bit downwards in order to exert the weight of drilling, can exert the weight of drilling that is enough to eat into the lunar rock layer to the coring bit; the core drill bit is cooled by the protective liquid discharged into the well and the rock stratum forms a solid and stable solidified layer, so that the drilling efficiency and the drilling depth can be greatly improved, the technical problem that the existing drilling device is difficult to apply downward drilling pressure to the lunar layer due to the low gravity environment of the lunar is solved, deep lunar rock is drilled, and powerful technical support is provided for quality-guaranteeing coring on the spot.
5. The utility model discloses when the configuration is along with protecting the mechanism, adopt the viscoelastic body of self-healing to guarantee the quality and get the core, in order to solve current month base and get the technical problem that the core exists "getting not really", when the core gets into and gets the core sleeve, the core contacts with the viscoelastic body of self-healing, the viscoelastic body of self-healing takes place deformation under the effect of the ascending power of core, flow along the annular gap between core inner tube and the core, wrap the core gradually, under the constraint of coring sleeve bottom core sealer, the viscoelastic body of self-healing contacts bottom the core, take place the self-healing effect through the reversible bonding of molecule dynamic bond in core bottom, in order to utilize chemical seal to form the quality-guaranteeing seal membrane around getting the core, guarantee core normal position quality state, realize the complete cladding and the fidelity of core, and then establish better basis for moon normal position deep scientific exploration research of rock, has good application prospect.
Drawings
The invention will be described by way of example only and with reference to the accompanying drawings, in which
Fig. 1 is a schematic view of a moon-based while-drilling following device provided by an embodiment of the present invention before coring;
FIG. 2 is a schematic cross-sectional view along the direction A-A in FIG. 1 according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view along the direction B-B in FIG. 1 according to an embodiment of the present invention;
FIG. 4 is a schematic view of a lunar-based while drilling following device provided by an embodiment of the present invention during coring;
fig. 5 is a schematic view of the lunar-based while-drilling following device provided by the embodiment of the present invention after coring;
FIG. 6 is a graph showing the relationship between the boiling point and the vacuum degree of each solvent provided by the embodiment of the present invention;
fig. 7 is a graph of the temperature drop corresponding to 1kg of water when 1kg of solvent is directly volatilized according to the embodiment of the present invention.
Description of reference numerals: 1-core drill bit; 2-core sealer; 3-a helix; 4-a drain port; 5-coring the inner cylinder; 6-a bearing; 7-the outer tube of the corer; 8-a liquid following flow channel; 9-a one-way valve; 10-a piston; 11-a rotation mechanism; 12-a coupling; 13-inflation expansion ring; 14-an air reservoir; 15-a controller; 16 a hanger; 17-a cable; 18-a core; 19-a push rod; 20-a liquid storage cavity; 21-a disposable protective sleeve; a-a self-healing viscoelastic body; b-a follow-up liquid.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
The embodiment is substantially as shown in fig. 1 to 5: the embodiment provides a moon-based following device while drilling, which aims to solve the technical problem that the existing moon-based coring has the defect that the coring depth is not deep, and comprises a controller 15, a corer outer tube 7 and a coring bit positioned below the corer outer tube 7; a drilling mechanism is arranged in the outer tube 7 of the coring device, the drilling mechanism comprises a push rod 19 and a rotating mechanism 11, the push rod 19 and the rotating mechanism 11 are respectively connected with a controller 15, the push rod 19 is used for applying axial drilling pressure to the coring bit 1, the rotating mechanism 11 is used for applying torque to the coring bit 1 so as to ensure that the coring bit 1 drills quickly, specifically, the push rod 19 can be an electric push rod 19 or a pneumatic push rod 19, and the rotating mechanism 11 can specifically adopt the rotating mechanism 11 used in the existing drilling field; preferably, the controller 15 may be built into the upper inside of the outer corer tube 7 to facilitate access to the drilling mechanism for connection of the controller 15 to the drilling mechanism by a cable 17.
The key point of this embodiment lies in being provided with along with protecting the mechanism between drilling mechanism and coring bit 1, and along with protecting mechanism lower extreme and coring bit 1 fixed connection, along with protecting the upper end of mechanism and being connected with drilling mechanism to make in coring process, arrange the interior along with protecting liquid b of placing in corer outer tube 7 outside to the well through along with protecting the mechanism.
Therefore, the implementation principle of the basic scheme of the embodiment is as follows: the following protection liquid b is applied to the month-based coring, the coring is carried out in the moon environment, the following protection liquid b arranged in the outer tube 7 of the coring device is discharged to a well by using a following protection mechanism, so that the following protection liquid b can quickly permeate into surrounding rock stratums, quickly volatilizes along with the solvent in the protection liquid b under the vacuum action of the moon, and takes away heat; on one hand, the solvent is volatilized to take away a large amount of heat, so that the coring bit 1 can be cooled in real time, the long-term use of the coring bit 1 is facilitated, and the smooth drilling is ensured; on the other hand, the solvent is volatilized to leave the polymer in the pores of the rock stratum, and the polymer and the rock stratum are subjected to solidification and cementation to form a hard stable layer, so that the phenomena of sticking of the drill and the like can be prevented, and the lunar-based coring drilling is ensured to be smoothly carried out.
The follow-up fluid b can be the follow-up fluid b applied to the technical field of drilling in the prior art, and mainly comprises a solvent for volatilizing and taking away heat of the core bit 1 and a polymer capable of performing a solidification and cementation effect with a rock stratum.
The following protection mechanism provided by the embodiment comprises a following protection cylinder 21 and a piston 10, wherein the piston 10 is arranged between the drilling mechanism and the following protection cylinder 21 and fixedly connected with the drilling mechanism and the following protection cylinder 21, specifically, the upper end of the piston 10 is fixedly connected with a rotating mechanism 11 in the drilling mechanism, the lower end of the piston 10 is fixedly connected with the following protection cylinder 21, and the following protection cylinder 21 is integrally connected with a core bit 1, so that the piston 10 can move downwards under the pushing of the drilling mechanism; a follow-up protection fluid flow channel 8 is arranged in the follow-up protection cylinder 21, and a fluid storage cavity 20 for containing a follow-up protection fluid b is arranged between the follow-up protection cylinder 21 and the outer tube 7 of the core taking device, so that the follow-up protection fluid b arranged in the fluid storage cavity 20 can enter the follow-up protection fluid flow channel 8 and is discharged outside through a discharge port 4 arranged on a drill bit of the core taking drill in the downward moving process of the piston 10; by adopting the structure, the following protection mechanism provided by the embodiment has a simple structure and is ingenious in design, and the following protection liquid b which is arranged in the liquid storage cavity 20 in the process of applying the drilling pressure on the core bit 1 by utilizing the drilling mechanism can naturally enter the following protection liquid flow channel 8 through the matching design of the piston 10 and the following protection cylinder 21 and is discharged to a well through the discharge port 4 arranged on the core bit 1 without additional power equipment; the protective liquid b is discharged to a position close to the core bit 1 in a simple and convenient manner.
As a preference of the embodiment, one end of the slave casing 21 close to the piston 10 is provided with a one-way valve 9, so that the slave liquid b arranged in the reservoir chamber 20 can enter the slave liquid flow passage 8 through the one-way valve 9 in the process of moving the piston 10 downwards; therefore, the liquid in the liquid following and protecting channel 8 can not flow back to the liquid storage cavity 20, so as to be beneficial to protecting the liquid following and protecting b in the liquid storage cavity 20; combine the design of earning bit 1 upward discharge opening 4, as the further preferred of this embodiment, 1 surface at the coring bit is equipped with helix 3, so that discharge from discharge opening 4 in the well along with protecting liquid b direct by locating 3 even smearing on the wall of a well on the helix on coring bit 1 surface, this structural design is ingenious reasonable, can make along with protecting more even the smearing on the wall of a well of liquid b, in order to reach the mesh of quick cooling coring bit 1, leave the polymer phase in making loose rock grain clearance simultaneously and take place to consolidate and solidify fast, reduce the drill bit temperature in real time when improving wall of a well intensity from this, improve the drill bit life-span.
The slave solution b provided by the embodiment comprises a solvent, a polymer and a filler; wherein, preferably, the solvent can be one or more of methylamine, dimethylamine, diethyl ether, pentane, dichloromethane, carbon disulfide, acetone, chloroform, methanol, tetrahydrofuran, hexane and cyclohexane; preferably, the polymer comprises one or more of cellulose diacetate, cellulose triacetate, cellulose acetate propionate, cellulose nitrate, regenerated cellulose, aromatic polyamide, nylon-66, aromatic polyamide hydrazide, polyphenylsulfone terephthaloyl, polybenzimidazole, polyimide, polysulfone, polyethersulfone, sulfonated polysulfone, polysulfonamide, polyvinyl alcohol, polyvinyl chloride, polyvinylidene fluoride, polycarbonate; further, the mass ratio of the solvent to the polymer is preferably 100: 1-100: 50; preferably, the filler may be one or more of a lamellar nanofiller, a fibrous nanofiller or a particulate filler; further, the solvent to filler ratio is preferably 100: 0-100: 100, respectively;
wherein, the lamellar nano-filler can be boron nitride, montmorillonite graphene, Mxene, layered double hydroxide and the like; the fibrous nano-filler can be cellulose nano-crystal, carbon nano-tube and the like; the granular filler can be nano calcium carbonate, nano zinc oxide, nano ferric oxide, gold granules and silver granules.
For the selection of the care solution b, fig. 6 shows the boiling points of the solvents under different vacuum degrees; FIG. 7 is a graph showing the temperature drop of 1kg of water corresponding to 1kg of solvent directly volatilized; according to the invention, the heat quantity taken away by evaporation is converted, wherein 363.7kj of heat quantity is taken away by volatilizing 1kg of dichloromethane solvent, which is equivalent to that 1kg of water is cooled to 85 ℃; 1kg of cyclohexane solvent is volatilized to take 387.8kj of heat away, which is equivalent to the temperature reduction of 92.8 ℃ by 1kg of water; 1kg of hexane solvent is volatilized to take away 396kj of heat, which is equivalent to the temperature reduction of 94.7 ℃ by 1kg of water; 1kg of hexane solvent is volatilized to take away 396kj of heat, which is equivalent to the temperature reduction of 94.7 ℃ by 1kg of water; 1kg of ethanol solvent is volatilized to take 1.12.6kj of heat away, which is equivalent to the temperature reduction of 242.2 ℃ by 1kg of water; 1kg of methanol solvent is volatilized to take 1276.7kj of heat away, which is equivalent to the temperature reduction of 305.4 ℃ by 1kg of water; meanwhile, through experimental verification, 50ml of dichloromethane is found to be cooled by at least 42.3 ℃ in a complete vacuum environment.
Of course, the selection of the solvent, the polymer and the filler component and the proportion range are only used as the preferable scheme of the secondary protecting liquid b, but not limited to the above, and the secondary protecting liquid b can be applied to the lunar-based coring, and the secondary protecting liquid b contains the heat-dissipating solvent and the polymer which can be solidified and cemented with the rock stratum, and all the following protecting liquid b is included in the protection scope of the present invention.
On the other hand, the embodiment also provides a method for rapidly fixing the hole and coupling the cooling drill bit, which adopts the lunar-based while-drilling follow-up device, and the method comprises the following steps:
before coring, presetting follow-up liquid b in a liquid storage cavity 20 between a follow-up cylinder 21 and the outer tube 7 of the coring device, and simultaneously placing a moon-based follow-up device to a position where a well is drilled on the moon through a hanger 16 and a cable 17 which are arranged at the top of the outer tube 7 of the coring device;
during coring, the push rod 19 and the rotating mechanism 11 are controlled to work by the controller 15, and torque and axial bit pressure are applied to the coring bit 1; the following protection liquid b preset in the liquid storage cavity 20 flows through a following protection liquid flow channel 8 in a following protection cylinder 21 positioned in an outer tube 7 of the coring device through a following protection mechanism, specifically, in the process that a push rod 19 pushes a piston 10 to move downwards, the following protection liquid b preset in the liquid storage cavity 20 flows into the following protection liquid flow channel 8 through a one-way valve 9 positioned at the top of the following protection cylinder 21, flows into the position of the coring bit from top to bottom along the following protection liquid flow channel 8, is discharged to a well through a discharge port 4 arranged on the coring bit, and is uniformly smeared on the well wall through a spiral line 3 on the surface of the coring bit; because the follow-up protective solution b contains a solvent and a polymer, the follow-up protective solution b permeates into pores of a rock layer of a well wall of a newly drilled lunar rock layer, the solvent in the follow-up protective solution b is quickly volatilized under the vacuum action of a moon, so that the polymer phase is left in gaps of loose rock particles in the rock layer to be cemented and solidified, and further the rock layer forms a solid and stable solidified layer, so that the well wall strength is improved, therefore, when the moon-based follow-up drilling device is adopted for drilling, the rock particles cannot enter a coring device, and the phenomena of drilling sticking and the like are avoided; meanwhile, the outer tube 7 of the coring device can be fixed on the layer for the next coring operation so as to carry out deep coring and be used as a bedding; simultaneously, because liquid volatilizees and absorbs a large amount of heats for solvent volatilizees when carrying out the solid hole along with protecting liquid b, takes away the heat that produces when coring bit creeps into, reduces coring bit 1 temperature in real time, improves coring bit 1 life-span.
Example two
The second embodiment is substantially the same as the first embodiment, except that: the embodiment provides a lunar-based while-drilling following device, as a preferred scheme of the first embodiment, as shown in fig. 4 and 5, in combination with the design of the following mechanism, the key point of the first embodiment is that an inflation mechanism fixedly connected with the outer tube 7 of the coring device is further arranged on the upper portion of the outer tube 7 of the coring device, and the inflation mechanism is connected with the controller 15, so that during coring, the controller 15 can control the inflation mechanism to radially expand along the outer tube 7 of the coring device to press the well wall, and the outer tube 7 of the coring device is radially centered and axially fixed through friction between the inflation mechanism and the well wall.
Therefore, the implementation principle of the basic scheme of the embodiment is as follows: the air inflation mechanism arranged on the upper part of the outer tube 7 of the coring device expands along the radial direction of the outer tube 7 of the coring device to extrude the well wall, and the outer tube 7 of the coring device is centered in the radial direction and fixed axially through the friction force between the air inflation mechanism and the well wall, so that the outer tube 7 of the coring device is firmly fixed with the well wall; the coring bit 1 is pushed downwards through a drilling mechanism inside the coring device to apply torque and axial drilling pressure to the coring bit 1, the drilling pressure enough to be eaten into a lunar stratum can be applied to the coring bit, the coring bit 1 is cooled by combining with the protective fluid b discharged into a well, and the stratum forms a solid and stable solidified layer, so that the drilling efficiency and the drilling depth can be greatly improved, the technical problem that the existing drilling device is difficult to apply downward drilling pressure to the lunar layer due to the low gravity environment of the moon is solved, the deep lunar rock is drilled, the high-depth fidelity coring is further realized, and the technical problem that the existing lunar-based coring is not deep in fetching is solved.
Specifically, the inflation mechanism provided by the embodiment comprises an air storage cylinder 14 and an inflation expansion ring 13, wherein the air storage cylinder 14 is filled with nitrogen or inert gas and is communicated with the inflation expansion ring 13 through a controller 15, so that the controller 15 can control the nitrogen or inert gas in the air storage cylinder 14 to be discharged into the inflation expansion ring 13, the controller 15 can specifically control the valve between the air storage cylinder 14 and the inflation expansion ring 13 to be opened, after the drilling device is lowered to the well bottom, the nitrogen or inert gas in the air storage cylinder 14 is discharged into the inflation expansion ring 13, the inflation expansion ring 13 extrudes the well wall of the solidified layer after radially expanding along the outer tube 7 of the coring device, and the outer tube 7 of the coring device is radially centered and axially fixed through the friction force between the inflation expansion ring 13 and the well wall, and the structure is simple in design but ingenious and reasonable; wherein inflation ring 13 can select for use silicon rubber or fluororubber etc. has better ductility and for the material of resistant high low temperature, radiation protection cosmic ray, also can select for use other materials that have ductility and for resistant high low temperature, radiation protection cosmic ray certainly, all is within the utility model discloses an within the protection scope.
As a preferable scheme of the air inflation mechanism, in the embodiment, the air storage cylinder 14 is arranged along the axial line of the outer tube 7 of the core taking device, and the air inflation expansion ring 13 is arranged circumferentially around the outer side of the air storage cylinder 14, so that the air inflation expansion ring 13 can expand outwards along the radial direction of the outer tube 7 of the core taking device after being inflated; by adopting the structure, the air storage cylinder 14 is arranged in the middle in the outer tube 7 of the coring device, and the air inflation expansion ring 13 which is circumferentially arranged around the outer side of the air storage cylinder 14 can be uniformly expanded and expanded to be firmly attached to the well wall after being filled with nitrogen or inert gas, so that a drilling mechanism can apply torque and axial drilling pressure to the coring bit 1; further, the air storage cylinder 14 is configured with a plurality of inflation expansion rings 13, in this embodiment, four inflation expansion rings 13 are provided as an example, and the four inflation expansion rings 13 are uniformly arranged along the outer side of the air storage cylinder 14 in the axial direction, wherein one end of the inflation expansion ring 13 close to the air storage cylinder 14 is an inflation end, and one end of the inflation expansion ring 13 far away from the air storage cylinder 14 is an outward expansion end; the outer expanding end extends out of the outer tube 7 of the coring device and is pressed with the well wall to form surface contact after being inflated and expanded, so that the outer tube 7 of the coring device can be firmly fixed on the well wall.
On the other hand, the push rod 19 provided by the drilling mechanism of the present embodiment is preferably a pneumatic push rod 19, and the air storage cylinder 14 is communicated with the air storage cavity of the push rod 19 through the controller 15, so that the inert gas in the air storage cylinder 14 can be controlled by the controller 15 to be discharged into the air storage cavity of the push rod 19, and the push rod 19 is driven to apply axial bit pressure to the coring bit 1. Certainly, the push rod 19 is not limited to this, and the push rod 19 may also be an electric push rod 19, the push rod 19 is fixed on the inner wall of the outer tube 7 of the coring device through the coupling 12, and the electric push rod 19 is connected with the controller 15 through the cable 17 and the power supply, so that the controller 15 controls the push rod 19 to operate, and the axial bit pressure is applied to the coring bit 1.
EXAMPLE III
The third embodiment is substantially the same as the first embodiment, except that: this embodiment provides a month base is along with following and is protected device to solve current month base and get the technical problem that exists "not true" core, combine fig. 4 and fig. 5 to show, be provided with in coring bit and get the core inner tube, it is connected with bearing 6 to get core inner tube top, so that it is connected with coring bit to make coring inner tube pass through bearing 6, adopts above-mentioned structure, can effectively avoid getting the core and follow the rotation of coring bit, does benefit to the protection and gets core 18.
The key point of this embodiment lies in being provided with coring inner tube 5 in coring drill bit 1, is provided with the rock core sealer 2 in coring inner tube 5 bottom, and is equipped with the viscoelastic body a of self-healing in coring inner tube 5 to make in coring process, the viscoelastic body a of self-healing can be along the annular clearance motion between coring inner tube 5 and the rock core 18, in order to cover the surface of parcel brill rock core 18, realizes the fidelity and coring.
Specifically, the self-healing viscoelastic body a provided by the embodiment can adopt a viscoelastic body with a self-healing effect in the prior art; in order to make the self-healing viscoelastic body a provided by this embodiment have good plasticity, the material selected for the self-healing viscoelastic body a provided by this embodiment includes polysiloxane, boric acid series acid, and lamellar filler; preferably, the polysiloxane is any hydroxyl-terminated polysiloxane or any amino-terminated polysiloxane having a viscosity of 10 to 100000 mpa.s; further, the polysiloxane is one or more of hydroxyl-terminated polydimethylsiloxane, amino-terminated polyphenyl methyl siloxane, hydroxyl-terminated polyphenyl methyl siloxane and amino-terminated polydimethylsiloxane; further, the mass ratio of the polysiloxane to the boric acid series acid is 100: 1-100: 100, respectively; the boric acid series acid is one or more of boric acid, 4-hydroxyphenylboronic acid, 2-aminophenylboronic acid, 4-carboxyphenylboronic acid and phenylboronic acid; the lamellar filler is one or more of boron nitride, montmorillonite (especially modified montmorillonite), graphene, Mxene and layered double hydroxide, wherein the boron nitride is particularly preferably polyhydroxy boron nitride subjected to ultrasonic treatment; the montmorillonite is particularly preferably organic montmorillonite modified by trimethyl hexadecyl ammonium bromide or L-cystine; further, the mass ratio of the polysiloxane to the filler is preferably 100: 0-100: 20.
of course, the selection of the specific components and the proportion range of the polysiloxane, the boric acid series acid and the lamellar filler is only used as the preferable scheme of the self-healing viscoelastic body a in the embodiment, and compared with the phenomena of brittle fracture and the like of other high polymer materials at extremely low temperature, the self-healing viscoelastic body of the utility model has the capability of deforming at low temperature; meanwhile, the self-healing viscoelastic body made of the material takes polysiloxane as a main body material, and has the advantages of radiation ozone resistance, environmental adaptation and the like; however, the invention is not limited to this, and all viscoelastic bodies that can be applied to the coring of the lunar root and have a self-healing effect are included in the protection scope of the invention.
Therefore, the implementation principle of the embodiment is as follows: the self-healing viscoelastic body a is applied to the lunar-based follow-up device while drilling, and is preset in the coring inner cylinder 5 of the lunar-based coring specifically, so that the rock core 18 is in contact with the self-healing viscoelastic body a when entering the coring inner cylinder 5, the self-healing viscoelastic body a deforms under the action of upward force of the rock core 18, the drilled rock core 18 is gradually coated, the self-healing viscoelastic body a is in complete contact with the surface of the extracted rock core 18 under the constraint of the bottom rock core sealer 2, the self-healing occurs through reversible bonding of molecular dynamic bonds at the bottom of the rock core 18 and acts on the rock core 18 to complete chemical sealing, and finally the bottom of the inner cylinder 5 is completely sealed through combining mechanical structure sealing and chemical sealing, so that the rock core 18 can be completely coated, and the coring layer structure of the rock core 18 is kept; the self-healing viscoelastic body a serves as an independent part and is convenient to take out from the core taking device after the core 18 is coated, so that the core 18 can be completely coated and subjected to fidelity coring.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A moon-based while-drilling following device is characterized in that: the coring device comprises a controller, a corer outer tube and a coring bit positioned below the corer outer tube;
a drilling mechanism is arranged in the outer tube of the coring device, the drilling mechanism comprises a push rod and a rotating mechanism, the push rod and the rotating mechanism are respectively connected with the controller, the push rod is used for applying axial bit pressure to the coring bit, and the rotating mechanism is used for applying torque to the coring bit;
be provided with along with protecting the mechanism between drilling mechanism and the coring bit, just along with protecting mechanism lower extreme and coring bit fixed connection, along with protecting the upper end of mechanism and being connected with drilling mechanism to the messenger is in coring process, arranges the interior along with protecting the liquid of placing in the corer outer tube outside the well through along with protecting the mechanism.
2. The moon based while drilling follow-up device of claim 1, wherein: the following protection mechanism comprises a following protection cylinder and a piston, the piston is arranged between the drilling mechanism and the following protection cylinder and fixedly connected with the drilling mechanism and the following protection cylinder, and the following protection cylinder and the core bit are integrally connected so that the piston can move downwards under the pushing of the drilling mechanism; and a following protection liquid flow channel is arranged in the following protection cylinder, and a liquid storage cavity for containing the following protection liquid is arranged between the following protection cylinder and the outer tube of the core taking device, so that the following protection liquid arranged in the liquid storage cavity can enter the following protection liquid flow channel in the downward moving process of the piston and is discharged outside through a discharge port arranged on a drill bit of the core taking drill.
3. The moon based while drilling follow-up device of claim 2, wherein: one end of the slave casing, which is close to the piston, is provided with a one-way valve, so that the slave liquid, which is arranged in the liquid storage cavity, can enter the slave liquid flow passage through the one-way valve in the process that the piston moves downwards.
4. The moon based while drilling follow-up device of claim 2, wherein: the surface of the core bit is provided with a spiral line, so that the protective liquid discharged to the well is uniformly coated on the well wall by the spiral line arranged on the surface of the core bit.
5. The moon based while drilling follow-on device according to any one of claims 1 to 4, wherein: the coring device outer tube upper portion embeds there is the mechanism of aerifing with coring device outer tube fixed connection, aerify the mechanism with the controller is connected to the messenger is coring in-process, and the controller can control aerify the mechanism and extrude the wall of a well along the radial inflation of coring device outer tube to make the coring device outer tube radially placed in the middle and axial fixity through aerifing frictional force between mechanism and the wall of a well.
6. The moon based while drilling follow-up device of claim 5, wherein: the inflation mechanism comprises an air storage cylinder and an inflation expansion ring, wherein nitrogen or inert gas is filled in the air storage cylinder and is communicated with the inflation expansion ring through a controller, so that the nitrogen or the inert gas in the air storage cylinder can be controlled to be discharged into the inflation expansion ring through the controller.
7. The moon based while drilling follow-up device of claim 5, wherein: the coring device is characterized in that a coring inner cylinder is arranged in the coring drill bit, and the top of the coring inner cylinder is connected with a bearing, so that the coring inner cylinder is connected with the coring drill bit through the bearing.
8. The moon based while drilling follow-up device of claim 7, wherein: coring the inner tube bottom and being provided with the rock core sealer, just be equipped with the viscoelastic body of self-healing in coring the inner tube to the messenger is coring the in-process, the viscoelastic body of self-healing can along coring the annular gap motion between inner tube and the rock core, to cover the parcel and bore the surface of getting the rock core.
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| CN202021638379.6U CN212693299U (en) | 2020-08-07 | 2020-08-07 | Moon-based following protection device while drilling |
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| CN202021638379.6U CN212693299U (en) | 2020-08-07 | 2020-08-07 | Moon-based following protection device while drilling |
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| CN111999098A (en) * | 2020-08-07 | 2020-11-27 | 深圳大学 | Method for cooling drill bit by coupling moon-based follow-up device and rapid fixed hole |
| CN115822491A (en) * | 2022-09-09 | 2023-03-21 | 四川大学 | Large-depth moon in-situ core taking device with following protection |
| CN116181262A (en) * | 2022-12-19 | 2023-05-30 | 四川大学 | In-situ film-forming quality-guaranteeing coring device and coring method for combustible ice |
| CN116427890A (en) * | 2023-06-13 | 2023-07-14 | 山东鼎维石油科技有限公司 | Thickened oil well exploitation equipment |
| CN111999098B (en) * | 2020-08-07 | 2024-10-29 | 深圳大学 | Method for cooling drill bit by coupling month-based while-drilling protection device with rapid hole fixing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111999098A (en) * | 2020-08-07 | 2020-11-27 | 深圳大学 | Method for cooling drill bit by coupling moon-based follow-up device and rapid fixed hole |
| CN111999098B (en) * | 2020-08-07 | 2024-10-29 | 深圳大学 | Method for cooling drill bit by coupling month-based while-drilling protection device with rapid hole fixing |
| CN115822491A (en) * | 2022-09-09 | 2023-03-21 | 四川大学 | Large-depth moon in-situ core taking device with following protection |
| CN115822491B (en) * | 2022-09-09 | 2024-05-10 | 四川大学 | Moon large-depth in-situ coring while drilling device |
| CN116181262A (en) * | 2022-12-19 | 2023-05-30 | 四川大学 | In-situ film-forming quality-guaranteeing coring device and coring method for combustible ice |
| CN116181262B (en) * | 2022-12-19 | 2024-05-10 | 四川大学 | In-situ film-forming quality-guaranteeing coring device and coring method for combustible ice |
| CN116427890A (en) * | 2023-06-13 | 2023-07-14 | 山东鼎维石油科技有限公司 | Thickened oil well exploitation equipment |
| CN116427890B (en) * | 2023-06-13 | 2023-09-05 | 山东鼎维石油科技有限公司 | Thickened oil well exploitation equipment |
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