CN114607302A - Core drilling device and core drilling method - Google Patents
Core drilling device and core drilling method Download PDFInfo
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- CN114607302A CN114607302A CN202210360380.4A CN202210360380A CN114607302A CN 114607302 A CN114607302 A CN 114607302A CN 202210360380 A CN202210360380 A CN 202210360380A CN 114607302 A CN114607302 A CN 114607302A
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- 238000005553 drilling Methods 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000003292 glue Substances 0.000 claims abstract description 210
- 238000002347 injection Methods 0.000 claims abstract description 40
- 239000007924 injection Substances 0.000 claims abstract description 40
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- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
- E21B25/08—Coating, freezing, consolidating cores; Recovering uncontaminated cores or cores at formation pressure
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- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention provides a core drilling device and a core drilling method, and relates to the technical field of drilling machine equipment, wherein the core drilling device comprises: a drilling machine; the core bit is arranged on the drilling machine and is provided with a containing cavity for containing a core; the glue injection device comprises a glue outlet structure arranged in the accommodating cavity and a glue injection mechanism communicated with the glue outlet structure; the distance measuring device is used for acquiring a core distance signal; and the microcomputer controller is electrically connected with the glue applying mechanism and the distance measuring device, receives the core distance signal and outputs a stroke control signal, and the glue applying mechanism receives the stroke control signal and is used for controlling the glue output amount. The device is got to core brill can coat the right amount of glue on the core and form the inoxidizing coating after getting the core, can prevent that the core from appearing damaged. The invention also provides a core drilling method, and the core drilling method can obtain more complete cores by using the core drilling device.
Description
Technical Field
The invention relates to the technical field of drilling machine equipment, in particular to a core drilling device and a core drilling method.
Background
Magnetic stratigraphy research methods and experimental techniques have been widely applied to a plurality of research fields such as the basin mountain system evolution, the source transition, the source sink process, the earth dynamics and the like. Higher natural remanence (NMR) and primary magnetization (DRM) are always reserved in some core samples, the difference of geomagnetic field change characteristics and inversion frequency of the geomagnetic field change characteristics in geological history periods can be accurately revealed through magnetic research on the core samples, and a magnetic polarity change sequence diagram based on the stratum sequence of the rock unit is favorably constructed. But the influence of environment and human factors is limited, the rock core is easy to crack, lose and shift in the processes of drilling, transportation, storage and the like, so that the integrity of the rock core is damaged, and the geological analysis performed on the rock core is seriously influenced.
Disclosure of Invention
In order to overcome the above defects in the prior art, embodiments of the present invention provide a core drilling device and a core drilling method, where the core drilling device can coat a proper amount of glue on a core to form a protective layer after drilling the core, so as to maintain the integrity of the core and prevent the core from being damaged; the core drilling method can obtain a more complete core by applying the core drilling device.
The above objects of the present invention can be achieved by the following technical solutions, and the present invention provides a core drilling apparatus, including:
a drilling machine;
a core bit disposed on the drill rig, the core bit having a receiving cavity for receiving a core;
the glue injection device comprises a glue outlet structure arranged in the accommodating cavity and a glue applying mechanism communicated with the glue outlet structure;
a distance measuring device for acquiring a core distance signal;
the microcomputer controller is electrically connected with the glue applying mechanism and the distance measuring device, receives the core distance signal and outputs a stroke control signal, and the glue applying mechanism receives the stroke control signal and is used for controlling the glue outlet amount.
In a preferred embodiment of the present invention, the glue applying mechanism includes:
the glue injection cylinder comprises a cylinder body with a glue outlet and a piston movably arranged in the cylinder body in a penetrating manner, and the glue outlet is communicated with the glue outlet structure through a first one-way pipeline;
the glue storage cylinder is communicated with the glue injection cylinder through a second one-way pipeline;
the driver is electrically connected with the microcomputer controller, the driver is connected with the piston, and the driver receives the stroke control signal and controls the motion stroke of the piston.
In a preferred embodiment of the present invention, the glue discharging structure includes a plurality of glue injection nails embedded in an inner wall of the core drill bit, the glue injection nails are uniformly arranged around a rotation axis of the core drill bit at intervals, and the plurality of glue injection nails are all communicated with the first one-way pipeline.
In a preferred embodiment of the present invention, a drainage cover is disposed between the glue storage cylinder and the second one-way pipeline, one end of the drainage cover is communicated with the second one-way pipeline, and the other end of the drainage cover is connected with the glue storage cylinder through a thread to form a detachable structure.
In a preferred embodiment of the present invention, the microcomputer controller comprises a drilling depth calculating module and a glue amount calculating module, wherein the drilling depth calculating module receives the core distance signal and outputs a core length signal, and the glue amount calculating module receives the core length signal and outputs the stroke control signal.
In a preferred embodiment of the present invention, the distance measuring device comprises an infrared electronic distance meter, a distance measuring through hole is arranged at one end of the core bit close to the drilling machine, the infrared electronic distance meter can emit a distance measuring light beam, the distance measuring light beam is parallel to the rotation axis of the core bit, and the distance measuring light beam passes through the distance measuring through hole to obtain the core distance signal.
In a preferred embodiment of the invention, the drilling machine comprises a housing and a bit driving device arranged in the housing, the bit driving device is electrically connected with the microcomputer controller, and the bit driving device is connected with the coring bit through a gear transmission structure.
In a preferred embodiment of the present invention, the core drill bit includes a drill barrel and drill teeth disposed on the drill barrel.
In a preferred embodiment of the present invention, a clamp spring is disposed at an end of the drill cylinder away from the drilling machine, and the clamp spring is protruded in the receiving cavity to prevent the core from falling.
The invention also provides a core drilling method using the core drilling device, which comprises the following steps:
the core bit is abutted against a rock stratum to be cored, and a first core distance signal is obtained through a distance measuring device;
driving the coring bit to drill to a target depth of a rock stratum through the drilling machine, and acquiring a second core distance signal through a distance measuring device;
the microcomputer controller receives the first core distance signal and the second core distance signal to calculate the core length, calculates the required glue yield according to the core length, calculates the required running stroke of the piston according to the glue yield and outputs the stroke control signal;
the driver receives the stroke control signal, drives the piston to move, extrudes the glue in the glue injection cylinder into the glue outlet structure and discharges the glue, and then the glue wraps the rock core in the accommodating cavity;
and after the glue is solidified, taking out the core in the core bit to obtain a core sample.
In a preferred embodiment of the present invention, the calculation formula of the required operation stroke of the piston is as follows:
Hpiston＝ΠRRock core 2*(S1-S2)*(Π-2)/(4ΠrTwo one way 2)
In the formula: hPistonThe distance of the piston to move is the unit of meter/m; rRock coreThe radius of the core column is the unit of meter/m; s1Is the length of the first separation distance, S2The length of the second spacing distance is in the unit of meter/m; r isTwo one wayThe radius of the second one-way pipeline is the unit of meter/m.
The technical scheme of the invention has the following remarkable beneficial effects:
when the core drilling device is used, the drilling machine drives the core drilling bit to abut against a rock stratum to be cored, and a first core distance signal from the rock stratum can be measured through the distance measuring device; then the drilling machine drives the coring bit to drill to the target depth of the rock stratum, and a second rock core distance signal from the rock core can be measured through the distance measuring device; can calculate the length that obtains the core through first core distance signal and second core distance signal, and then beat gluey mechanism and can export appropriate amount glue according to the length of core, go out gluey structure and receive glue and with glue coating to accomodate the core of intracavity, treat that glue can form the inoxidizing coating after solidifying on the core. The core can be prevented from being damaged in the coring and carrying processes through the protective layer, and the integrity of the core sample is improved. And this application can go out the volume of gluing according to the length control of rock core through combining together range unit and injecting glue device, has improved the homogeneity of glue coating and has reduced the waste of glue.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the invention as a matter of case.
FIG. 1 is a schematic cross-sectional view of the core drilling apparatus;
FIG. 2 is a schematic cross-sectional view of the core bit;
FIG. 3 is a schematic perspective view of the core bit;
FIG. 4 is a schematic structural view of the glue injection apparatus;
fig. 5 is a front view of the microcomputer controller.
Reference numerals of the above figures:
1. a drilling machine; 11. a housing; 12. a drill drive device; 13. a gear transmission structure; 131. a drive shaft; 132. a driven gear; 133. a drive shaft; 134. a driving gear;
2. a coring bit; 21. drilling a barrel; 22. drilling teeth; 23. a clamp spring; 24. a protective shell;
3. a glue injection device; 31. a glue outlet structure; 311. injecting glue nails; 32. a gluing mechanism; 321. a glue injection barrel; 322. a piston; 323. a first one-way pipe; 3231. a first check valve; 324. a glue storage cylinder; 325. a second one-way pipe; 3251. a second one-way valve; 326. a driver; 327. a drainage cover;
4. a distance measuring device; 41. an infrared electronic rangefinder; 42. a ranging through hole;
5. a microcomputer controller; 51. a main board; 52. a display; 53. a memory card slot module; 54. a function button module; 55. and a power switch module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The core sample is an important geological data for researching mineral products and geological information. Because the core sample mostly needs to be gathered in the field environment, in order to gather the core high-efficiently, the researcher carries portable core rig more and carries out the collection work. However, the core sample is easily influenced by environmental influences and human factors in the process of drilling the core, and the core sample is easily cracked in the drill bit cavity, so that the core sample is lack of integrity, and the cracked core sample can influence the accuracy of an experimental result. Therefore, researchers are required to re-drill core samples after the core is fractured, which greatly reduces the efficiency of core sample collection. The application provides a core bores gets device mainly used improves the integrality of core sample.
Referring to fig. 1 to 5 in combination, in an embodiment of the present application, there is provided a core drilling apparatus including: a drilling machine 1; a core bit 2 disposed on the drilling rig 1, the core bit 2 having a receiving cavity for receiving a core; the glue injection device 3 comprises a glue outlet structure 31 arranged in the accommodating cavity and a glue applying mechanism 32 communicated with the glue outlet structure 31; the distance measuring device 4 is used for acquiring a core distance signal; the microcomputer controller 5, the microcomputer controller 5 with beat gluey mechanism 32 with the range unit 4 electricity is connected, the microcomputer controller 5 receives core distance signal output stroke control signal, beat gluey mechanism 32 and receive stroke control signal is used for controlling out gluey volume.
On the whole, when the core drilling device is used, the drilling machine 1 drives the core bit 2 to abut against a rock stratum to be cored, and a first core distance signal from the rock stratum can be measured through the distance measuring device 4; then the drilling machine 1 drives the coring bit 2 to drill to the target depth of the rock stratum, and a second core distance signal from the core can be measured through the distance measuring device 4; can calculate the length that obtains the core through first core distance signal and second core distance signal, and then beat gluey mechanism 32 and can export appropriate amount glue according to the length of core, go out gluey structure 31 and receive glue and with glue coating to the core of accomodating the intracavity, treat that glue can form the inoxidizing coating after solidifying on the core, and then play the guard action to the core, prevent that the core from appearing cracked, improved the integrality of core.
Wherein, after coring bit 2 bored into the stratum, coring bit 2 accomodate the core of intracavity comparatively intact, but when advancing to bore to core, the core received the exogenic action and takes place fragmentation easily. Therefore, in order to improve the integrity of the core sample, the glue injection device 3 can be used to bond the core sample before the drill is lifted. When the core sample drilling operation is carried out in the field, the sampling personnel can adjust the length of the drilled core sample according to the type of rock so as to enable the core sample to have better quality. And to facilitate the collection of core samples in the field, the drilling machine 1 may be a portable drilling machine. Adopt the less core sample that portable rig can bore, and then reduced the quality of core sample, be convenient for the researcher to carry the core sample.
Specifically, referring to fig. 1 to 5 in combination, the core drilling apparatus may include: a drilling machine 1; a core bit 2; a glue injection device 3; a distance measuring device 4; a microcomputer controller 5.
In this embodiment, referring to fig. 1, fig. 2 and fig. 4, the glue applying mechanism 32 includes: the glue injection cylinder 321 comprises a cylinder body with a glue outlet and a piston 322 movably arranged in the cylinder body in a penetrating manner, and the glue outlet is communicated with the glue outlet structure 31 through a first one-way pipeline 323; the glue storage cylinder 324 is communicated with the glue injection cylinder 321 through a second one-way pipeline 325; and a driver 326, wherein the driver 326 is electrically connected to the microcomputer controller 5, the driver 326 is connected to the piston 322, and the driver 326 receives the stroke control signal and controls the movement stroke of the piston 322.
Specifically, a first one-way valve 3231 is arranged on the first one-way pipeline 323, and the first one-way valve 3231 enables the glue in the glue injection cylinder 321 to enter the glue outlet structure 31 only through the first one-way pipeline 323; the second one-way pipeline 325 is provided with a second one-way valve 3251, and the glue in the glue storage cylinder 324 can only enter the glue injection cylinder 321 through the second one-way pipeline 325 by the second one-way valve 3251.
The driver 326 may be a vertical motor, and the vertical motor may be connected to the piston 322 through a push rod to drive the piston 322 to reciprocate. When an upright motor is used, a decoder can be arranged between the upright motor and the microcomputer controller 5 for converting the stroke control signal into a control signal of the upright motor. Of course, the operator may also configure the driver 326 in other configurations, which are not limited herein.
When the glue dispensing mechanism 32 is used, the driver 326 receives the stroke control signal sent by the microcomputer controller 5, and can drive the piston 322 to reciprocate in the cylinder of the glue injection cylinder 321, so as to extrude the glue into the glue dispensing structure 31. The specific using process is as follows:
when the piston 322 extrudes the glue in the glue injection cylinder 321, due to the existence of the second check valve 3251, the glue in the cylinder glue injection cylinder 321 does not flow back into the glue storage cylinder 324, but enters the glue outlet structure 31 along the first check pipeline 323, and is coated on the core through the glue outlet structure 31, so that the glue outlet process is realized.
When the piston 322 is reset in the glue injection cylinder 321, due to the existence of the first check valve 3231, the glue in the glue outlet structure 31 cannot flow back to the glue injection cylinder 321, so that negative pressure is generated in the glue injection cylinder 321, and the glue in the glue storage cylinder 324 is sucked by the negative pressure and enters the cylinder body along the second check pipeline 325, thereby realizing the glue supplementing process.
When the piston 322 reciprocates in the glue injection cylinder 321, the glue in the glue storage cylinder 324 can be continuously conveyed to the glue discharging structure 31, so that the glue discharging process is realized.
In this embodiment, referring to fig. 3, the glue discharging structure 31 includes a plurality of glue injection nails 311 embedded in the inner wall of the core bit 2, the glue injection nails 311 are uniformly arranged around the rotation axis of the core bit 2 at intervals, and the plurality of glue injection nails 311 are all communicated with the first one-way pipeline 323. Glue can be uniformly applied to the core by the glue injection nails 311 disposed at uniform intervals. The designer can adjust the arrangement and the number of the glue injection nails 311 according to the requirement, which is not limited herein.
Because the volume of the glue in the glue storage cylinder 324 is limited, the glue needs to be replenished after the glue in the glue storage cylinder 324 is used up, in this embodiment, a drainage cover 327 is disposed between the glue storage cylinder 324 and the second one-way pipeline 325, one end of the drainage cover 327 is communicated with the second one-way pipeline 325, and the other end of the drainage cover 327 is connected with the glue storage cylinder 324 through a thread to form a detachable structure.
By arranging the drainage cover 327 between the glue storage cylinder 324 and the second one-way pipeline 325, the glue storage cylinder 324 can be quickly replaced to replenish the glue after the glue in the glue storage cylinder 324 is used up. Of course, the designer may also set other detachable communication structures between the glue storage cylinder 324 and the second one-way pipeline 325, which is not limited herein.
In this embodiment, the microcomputer controller 5 includes a drilling depth calculating module and a glue amount calculating module, the drilling depth calculating module receives the core distance signal and outputs a core length signal, and the glue amount calculating module receives the core length signal and outputs the stroke control signal.
Referring to fig. 5, the microcomputer controller 5 may further include a main board 51, and a display 52, a memory card slot module 53, a function button module 54, and a power switch module 55 disposed on the main board 51. The power switch module 55 is used to control the current of the main board 51. The motherboard 51 may be electrically connected to the drilling calculation module and the glue usage module. The display 52 is used for receiving signals of the drilling depth calculation module to display drilling depth data, so that a sampling person can more intuitively acquire sampling depth information, and the sampling person can conveniently control the length of the rock core.
When a researcher collects core samples, hundreds of core samples are sometimes required to be collected, but the researcher cannot record the length data of each core sample in time due to the severe field environment. Therefore, a memory card can be inserted into the memory card slot module 53 for recording drilling depth data. After coring is completed, the memory card can be taken out and inserted into a computer so as to read the acquired core length data. Can record core length data fast through using inboard draw-in groove module, improve core collection efficiency.
The function button module 54 may be arranged for controlling the drilling machine 1, and the function button module 54 may comprise 4 function buttons, namely a drilling button, a drilling stopping button, a glue preparing button and a glue injecting button. When the function button module 54 is used, the coring bit 2 is aligned with a rock stratum, and the drilling button is pressed down, so that the coring bit 2 drills a rock core; when the drilling is carried out to the set depth, a drilling stopping button is pressed down to stop the coring bit 2; then pressing the button for preparing glue, the microcomputer controller 5 calculates the motion stroke needed by the piston 322; finally, by pressing the button for injecting glue, the driver 326 moves the piston 322 to extrude the glue into the glue outlet structure 31 and coat the core. Of course, the designer may also adjust the structure of the function button module 54 as desired, without limitation.
In this embodiment, range unit 4 includes infrared ray electronic distance meter 41, it is close to get core bit 2 the one end of rig 1 is equipped with range finding through-hole 42, infrared ray electronic distance meter 41 can launch the range finding light beam, the range finding light beam with the axis of rotation of getting core bit 2 parallels, the range finding light beam passes range finding through-hole 42 is used for acquireing core distance signal.
Specifically, the infrared electronic distance meter 41 is fixedly mounted on the drilling machine 1. Wherein, because coring bit 2 during operation can be high-speed rotatory, consequently can only set up a range finding through-hole 42 on coring bit 2, the range finding light beam that infrared ray electronic distance meter 41 sent can pass range finding through-hole 42 regularly, and then the real-time measurement coring bit 2 in the core distance. The designer may also provide other window structures on the coring bit 2 for the ranging beam to pass through, without limitation. Of course, the designer may also select other distance measuring devices 4 according to the requirement, and here, the infrared distance measuring device is taken as an example, and the other devices are not limited.
In the embodiment, the drilling machine 1 comprises a housing 11 and a drill bit driving device 12 arranged in the housing 11, the drill bit driving device 12 is electrically connected with the microcomputer controller 5, and the drill bit driving device 12 is connected with the coring bit 2 through a gear transmission structure 13. Specifically, the gear transmission structure 13 comprises a driving shaft 131 rotatably arranged on the drilling machine 1, one end of the driving shaft 131 is connected with the coring bit 2, and a driven gear 132 is arranged on the driving shaft 131; a driving shaft 133 is arranged on the drill driving device 12, a driving gear 134 is arranged on the driving shaft 133, and the driving gear 134 is meshed with the driven gear 132 for transmission.
Further, in order to facilitate the sampling personnel to take out the core in the coring bit 2, the designer can adopt the detachable structure to meet the coring bit 2 and the drilling machine 1. When the core bit 2 is detachably connected to the drilling machine 1, a detachable butt joint may be provided on the first one-way pipe 323. When the coring bit 2 is separated from the drilling machine 1, the butt joint is disconnected; when the core bit 2 is connected with the drilling machine 1, the first one-way pipeline is communicated through the butt joint.
Specifically, the detachable structure between coring bit 2 and rig 1 uses the detachable connection structure that is used for between drill bit and rig among the prior art, and the butt joint uses the detachable butt joint that is used for between the pipeline among the prior art, and the designer can rationally select above-mentioned structure as required, does not do the restriction here.
In the present embodiment, the core drill bit 2 includes a drill barrel 21 and drill teeth 22 provided on the drill barrel 21. The drill teeth 22 may include a plurality of small rock breaking drill teeth 22, and the plurality of small rock breaking drill teeth 22 are welded on the drill barrel 21 at intervals. Wherein a protective shell 24 may be provided over the tooth 22 when the core drill bit 2 is not in use, in order to protect the tooth 22.
Because the core has great weight, the core drops from accomodating the chamber easily under the dead weight influence, and the core can receive the striking after dropping and produce the damage easily. In order to avoid the phenomenon, in this embodiment, one end of the drill cylinder 21, which is far away from the drilling machine 1, is provided with a clamp spring 23, and the clamp spring 23 is convexly arranged in the accommodating cavity for preventing the core from falling. When the core bit 2 drills, the core can smoothly pass through the clamp spring 23; and when carrying the brill and coring, can play certain clamping effect to the core through jump ring 23, and then can prevent that the core from dropping in accomodating the chamber. The designer can reasonably set the structure of the clamp spring 23 according to the requirement, and the design is not limited here.
When the core drilling device is used, the drilling machine 1 drives the core bit 2 to abut against a rock stratum to be cored, and a first core distance signal from the rock stratum can be measured through the infrared electronic distance measuring instrument 41; then the drilling machine 1 drives the coring bit 2 to drill to the target depth of the rock stratum, and a second core distance signal from the core can be measured through the infrared electronic distance measuring instrument 41; and then calculating the length of the rock core through a drilling depth calculation module in the microcomputer controller 5 according to the first rock core distance signal and the second rock core distance signal, driving the piston 322 to push out a proper amount of glue through the driver 326 according to the length of the rock core, coating the glue on the rock core in the containing cavity through the glue injection nail 311, and forming a protective layer after the glue is solidified on the rock core.
The core can be prevented from being damaged in the coring and carrying processes through the protective layer, and the integrity of the core sample is improved. And this application can control out the volume of gluing according to the length of different cores through combining together infrared ray electronic distance meter 41 with driver 326, has improved the homogeneity of glue coating and has reduced the waste of glue.
A core drilling method using the core drilling apparatus of the previous embodiment, comprising the steps of: abutting the coring bit 2 against a rock stratum to be cored, and acquiring a first core distance signal through a distance measuring device 4; the drilling machine 1 drives the core bit 2 to drill to a target depth of a rock stratum, and a second core distance signal is obtained through a distance measuring device 4; the microcomputer controller 5 receives the first core distance signal and the second core distance signal to calculate the core length, calculates the required glue yield according to the core length, calculates the required operation stroke of the piston 322 according to the glue yield, and outputs the stroke control signal; the driver 326 receives the stroke control signal, drives the piston 322 to move, and extrudes the glue in the glue injection cylinder 321 into the glue outlet structure 31 to discharge the glue, so that the core in the accommodating cavity is wrapped by the glue; and after the glue is solidified, taking out the core in the core bit 2 to obtain a core sample.
The calculation formula of the required operation stroke of the piston 322 is as follows:
Hpiston＝ΠRRock core 2*(S1-S2)*(Π-2)/(4ΠrTwo one way 2)
Specifically, the calculation formula of the movement stroke can be derived by the following calculation formula:
Srock core＝S1-S2
VGlue water＝ΠRRock core 2*SRock core*(ΠRRock core*RRock core*SRock core-2RRock core 2*SRock core)/(2RRock core*2RRock core*SRock core)
＝ΠRRock core 2*SRock core*(Π-2)/4
Further obtainable from the above formula:
Vglue water＝VRock core*(Π-2)/4＝MRock core/ρRock core*(Π-2)/4
HPiston＝VGlue water/(ΠrTwo one way 2)
In the formula: vGlue waterThe volume of the needed glue is as follows: cubic meter/m3；HPistonThe distance that the piston 322 needs to move, in units: rice/m; rRock coreCore column radius, unit: rice/m; s1Length, S, measured for first core distance signal2Measured length, S, for the second core distance signalRock coreCore length, unit: rice/m; r isTwo one wayRadius of the second one-way pipe 325, unit: rice/m; mRock coreIs core mass, unit: kg; rhoRock coreIs core density, unit: kg/m3；VRock coreCore volume, unit: cubic meter/m3。
The glue can be quick-drying glue. The quick-drying glue comprises the following components in percentage by mass: 14 to 50 percent of marble glue, 36 to 59 percent of polyvinyl acetate adhesive, 5 to 15 percent of styrene, 5 to 15 percent of acrylic ester, 2.5 to 4.5 percent of water and 2.5 to 3.5 percent of carbon black. Wherein the polyvinyl acetate adhesive is quick-drying type, and the polymerization degree is 550.
The quick-drying glue can be prepared by the following steps:
(1) a 50kg type stirrer can be adopted, the rotating speed of the stirrer is less than or equal to 85r/min, and the heating temperature of the stirrer is 40-75 ℃;
(2) adding 2.5-4.5 wt% of water and 2.5-3.5 wt% of carbon black into a stirrer;
(3) adding 36 wt% -59 wt% of polyvinyl acetate adhesive, 5 wt% -15 wt% of styrene and 5 wt% -15 wt% of acrylate into a stirrer;
(4) continuously stirring for 1.5-2.0 h, then stopping the machine for 1.5-1.8 h, and then starting the machine to continuously and uniformly stir for 2.5-3.6 h to obtain the quick-drying glue.
The corresponding quantity relation between the usage amount of the quick-drying glue and the fragmentation degree of the rock core can be obtained through multiple simulation experiments, and then the optimal usage amount of the glue can be determined according to different rock core samples through the corresponding quantity relation.
Wherein, the experimenter carries out the simulation experiment through injecting the glue of different quantity into on different core samples and draws the following conclusion:
when the using amount of the glue is more than 5.3% of the volume of the core sample, the glue can be solidified on the core sample to play a role in protection, the fragmentation degree of the core sample can be reduced, and the protection effect of the glue on the core sample is obviously improved along with the increase of the using amount of the glue;
when the using amount of the glue is more than 19.7% of the volume of the core sample, the glue can play a good protection role on the core sample, so that the fragmentation degree of the core sample is obviously reduced, and along with the increase of the using amount of the glue, the protection performance of the glue on the core sample is not obviously improved along with the increase of the using amount of the glue.
The invention uses the core drilling device and the piston stroke formula HPiston＝ΠRRock core 2*(S1-S2)*(Π-2)/(4ΠrTwo one way 2) The glue outlet amount can be automatically controlled according to the lengths of different cores, so that the glue outlet amount can be slightly larger than 19.7% of the volume of a core sample, the best protective effect of glue on the cores can be achieved, and the condition that the glue amount is insufficient or the glue is wasted due to manual determination of the glue outlet amount in the manual operation process is avoided.
Of course, in order to achieve the best protection effect of the glue on the core sample in the actual use process, the user also needs to consider the following conditions to determine the glue usage amount: the using amount of the glue needs to be more than 19.7% of the volume of the core sample, so that the glue can play a role in fully protecting; the optimal amount of the glue can be determined according to the corresponding quantity relationship between the amount of the quick-drying glue and the fragmentation degree of the core; random errors and human errors need to be considered, and the using amount of the glue can be further increased under the condition that the conditions are met so as to avoid the situation of insufficient using amount of the glue caused by errors; the amount of the glue can be increased according to the particularity of the shape of the core sample and the porosity conditions in different rock stratums, so that the situation of insufficient glue amount is prevented; the error caused by the volatilization of the glue needs to be considered. Of course, the user can also adjust the amount of the glue according to other situations, and the use amount is not limited here.
All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional. A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The above embodiments are only for illustrating the technical idea and features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the content of the present invention and implement the present invention, and not to limit the protection scope of the present invention by this means. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (11)
1. A core drilling apparatus, comprising:
a drilling machine;
a core bit disposed on the drill rig, the core bit having a receiving cavity for receiving a core;
the glue injection device comprises a glue outlet structure arranged in the accommodating cavity and a glue applying mechanism communicated with the glue outlet structure;
the distance measuring device is used for acquiring a core distance signal;
the microcomputer controller is electrically connected with the glue applying mechanism and the distance measuring device, receives the core distance signal and outputs a stroke control signal, and the glue applying mechanism receives the stroke control signal and is used for controlling the glue outlet amount.
2. The core drilling apparatus of claim 1, wherein the glue mechanism comprises:
the glue injection cylinder comprises a cylinder body with a glue outlet and a piston movably arranged in the cylinder body in a penetrating manner, and the glue outlet is communicated with the glue outlet structure through a first one-way pipeline;
the glue storage cylinder is communicated with the glue injection cylinder through a second one-way pipeline;
the driver is electrically connected with the microcomputer controller, the driver is connected with the piston, and the driver receives the stroke control signal and controls the motion stroke of the piston.
3. The core drilling apparatus as claimed in claim 2, wherein the glue discharging structure comprises a plurality of glue injection nails embedded in an inner wall of the core drill bit, the glue injection nails are uniformly spaced around a rotation axis of the core drill bit, and the plurality of glue injection nails are communicated with the first one-way pipe.
4. The core drilling device according to claim 2, wherein a drainage cover is arranged between the rubber storage cylinder and the second one-way pipeline, one end of the drainage cover is communicated with the second one-way pipeline, and the other end of the drainage cover is connected with the rubber storage cylinder through threads to form a detachable structure.
5. The core drilling apparatus of claim 1, wherein the microcomputer controller comprises a drilling depth calculating module and a glue amount calculating module, the drilling depth calculating module receives the core distance signal and outputs a core length signal, and the glue amount calculating module receives the core length signal and outputs the stroke control signal.
6. The core drilling apparatus as recited in claim 1, wherein said ranging device comprises an infrared electronic rangefinder, said coring bit having a ranging through-hole at an end proximate to said drill, said infrared electronic rangefinder capable of emitting a ranging beam parallel to an axis of rotation of said coring bit, said ranging beam passing through said ranging through-hole for obtaining said core distance signal.
7. The core drilling apparatus of claim 1, wherein the drilling machine comprises a housing and a bit drive disposed within the housing, the bit drive being electrically connected to the microcomputer controller, the bit drive interfacing with the coring bit through a gear transmission.
8. The core drilling apparatus as recited in claim 7, wherein said coring bit comprises a drill barrel and drill teeth disposed on said drill barrel.
9. The core drilling apparatus as claimed in claim 8, wherein a snap spring is provided at an end of the drill barrel remote from the drilling machine, the snap spring being protrudingly provided in the receiving cavity for preventing the core from falling.
10. A core drilling method using the core drilling apparatus as claimed in claim 2, characterized by comprising the steps of:
abutting the coring bit against a rock stratum to be cored, and acquiring a first rock core distance signal through a distance measuring device;
driving the coring bit to drill to a target depth of a rock stratum through the drilling machine, and acquiring a second core distance signal through a distance measuring device;
the microcomputer controller receives the first core distance signal and the second core distance signal to calculate the core length, calculates the required glue output according to the core length, calculates the required operation stroke of the piston according to the glue output and outputs the stroke control signal;
the driver receives the stroke control signal, drives the piston to move, extrudes the glue in the glue injection cylinder into the glue outlet structure and discharges the glue, and then the glue wraps the rock core in the accommodating cavity;
and after the glue is solidified, taking out the core in the core bit to obtain a core sample.
11. The core drilling method of claim 10, wherein the travel stroke required for the piston is calculated by the formula:
Hpiston＝ΠRRock core 2*(S1-S2)*(Π-2)/(4ΠrTwo one way 2)
In the formula: hPistonThe distance of the piston to move is the unit of meter/m; rRock coreThe radius of the core column is the unit of meter/m; s. the1Is a first core distance signal, S2Is a second core distance signal with the unit of meter/m; r isTwo one wayThe radius of the second one-way pipeline is the unit of meter/m.
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