A drilling method for quickly acquiring core information

Abstract

The present invention belongs to the field of coring technology, and discloses a drilling method for quickly acquiring core information, in order to solve the problem that the existing method of acquiring core information takes a long time and the acquired core information is not accurate enough. The present invention includes a coring drill bit, including the following: (1) using a laser probe on the coring drill bit to detect whether the core in the coring channel on the coring drill bit is a core of a set size; (2) spraying water fills the lower row of capsules in sequence so that the lower row of capsules covers the core in the coring channel; then the spraying water is transported to the nozzle and sprayed around the core through the nozzle; when the spraying water is transported to the nozzle, the spraying water is drained out of the liquid outlet channel of the coring drill bit through the shielding effect of the lower row of capsules and the core and discharged through the liquid outlet channel; (3) a CCD camera on the coring drill bit takes a photo of the core and transmits the photo of the core to an external control system, and the control system analyzes the photo of the core to obtain the core information.

Description

Technical Field

[0001] The invention belongs to the technical field of geological exploration, and in particular relates to a drilling method for quickly acquiring core information. Background Art

[0002] The core drilling mainly includes the following three steps: first, the circular crushing of the bottom rock of the well to form a core; second, protecting the core. When drilling and coring, the formed core must be protected to avoid the circulating drilling fluid eroding the core and the mechanical collision and damage of the drill pipe rotation; third, removing the core: after drilling and coring to a certain length (usually a single length, and long-barrel coring of tens of meters can also be carried out), it is necessary to cut and clamp the bottom of the formed core and lift it to the ground together with the drill bit when drilling.

[0003] At present, the core information is obtained by placing the core in a core box after completing the above three steps, and then analyzing the taken core to obtain the core information (such as RQD value, core recovery rate, etc.). This method has the following problems in actual use:

[0004] 1. The obtained cores are at risk of being broken due to mechanical collision and erosion of drilling fluid during the drilling process, resulting in the inability of the obtained cores to accurately reflect the geological structure;

[0005] 2. It takes a long time to remove the core from the drill bit (especially for the long core), which prolongs the time to obtain the core information;

[0006] 3. The core information that has been obtained can only be used for future drilling guidance and reference, and has no guiding significance for the current drilling operation (i.e., the drilling operation of obtaining the core). Summary of the invention

[0007] In order to solve the problems that it takes a long time to obtain core information and the obtained core information is not accurate enough, the present invention provides a drilling method for quickly obtaining core information. The core information can be obtained when drilling with a coring drill bit. On the one hand, it is convenient to quickly obtain the core information and guide the drilling operation at that time based on the core information. On the other hand, it reduces the risk of the obtained core being damaged during the drilling process, thereby improving the accuracy of the core information to more accurately reflect the geological structure.

[0008] In order to solve the technical problem, the technical solution adopted by the present invention is:

[0009] A drilling method for quickly acquiring core information includes a coring drill bit, wherein the drilling method based on the coring drill bit includes the following:

[0010] (1) Using a laser probe on the coring drill bit to detect whether the core in the coring channel on the coring drill bit is a core of a set size;

[0011] (2) If the laser probe determines that the core does not meet the set size, the coring drill bit drills normally; if the laser probe determines that the core meets the set size, spray water is output to the liquid inlet channel of the coring drill bit, and the spray water fills the lower row of capsules in turn so that the lower row of capsules covers the core in the coring channel; then the spray water is delivered to the nozzle and sprayed around the core through the nozzle; when the spray water is delivered to the nozzle, the spray water is drained out of the liquid outlet channel of the coring drill bit through the shielding effect of the lower row of capsules and the core and discharged through the liquid outlet channel;

[0012] (3) The CCD camera on the coring drill takes pictures of the surroundings of the core in the coring channel and transmits the pictures of the core to an external control system, which analyzes the pictures of the core to obtain core information.

[0013] In some embodiments, the CCD camera intermittently takes pictures of the core in the coring channel.

[0014] In some embodiments, the control system can obtain the drilling depth of the coring drill bit, and the control system controls the CCD camera to take pictures according to the drilling depth.

[0015] In some embodiments, flow meters are installed in the liquid inlet channel and the liquid outlet channel. The flow rates in the liquid inlet channel and the liquid outlet channel are calculated by the flow meters, and the data of the flow meters are transmitted to the control system. The control system uses the data of the flow meters as one of the reference data to adjust and match the drilling fluid.

[0016] In some embodiments, the coring drill bit includes a drill bit body and a joint, the middle portion of the drill bit body has a coring channel, the drill bit body is provided with a liquid inlet channel and a liquid outlet channel along the length direction of the drill bit body, the liquid inlet channel and the liquid outlet channel are respectively connected to an external water source system through pipelines, a plurality of nozzles for interconnecting with the liquid inlet channel and two rows of capsules for interconnecting with the liquid inlet channel are installed on the inner wall of the coring channel, the two rows of capsules are an upper row of capsules and a lower row of capsules, the upper row of capsules and the lower row of capsules can expand and cover the periphery of the core in the coring channel after water is injected, the nozzle is installed on the inner wall of the coring channel between the two rows of capsules, at least two groups of laser probes corresponding to each other are installed on the coring channel below the lower row of capsules, a plurality of CCD cameras for taking pictures of the core in the coring channel are installed on the coring channel above the upper row of capsules, the CCD cameras and the laser probes are electrically connected to an external control system; the coring channel above the lower row of capsules is provided with a liquid outlet interconnected with the liquid outlet channel.

[0017] In some embodiments, the liquid inlet channel delivers the spray water to the lower row of capsules, the nozzle and the upper row of capsules in the order of the lower row of capsules, the nozzle and the upper row of capsules.

[0018] In some embodiments, pressure valves for cutting off or connecting the liquid inlet channels are provided between the liquid inlet channel between the lower row of capsules and the nozzle, and between the liquid inlet channel between the nozzle and the upper row of capsules.

[0019] In some embodiments, the upper row of capsules and the lower row of capsules are both provided with an inlet and an outlet, the inlet of the lower row of capsules is connected to the liquid inlet channel, the outlet of the lower row of capsules is connected to the nozzle through the liquid inlet channel, the outlet of the upper row of capsules is connected through a reflux channel opened in the drill bit body, the reflux channel is connected to the liquid inlet channel, and a pressure valve and a one-way valve are installed in the reflux channel.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] During use, the drilling method for quickly acquiring core information of the present invention first detects the size of the core through a laser probe. If the cross-sectional size of the core in this section does not meet the design requirements, the coring drill bit continues drilling until the laser probe detects that the size of the core meets the set requirements. The laser probe transmits the information to an external control system, and the external control system controls an external water pump to input spray water of a certain pressure into the liquid inlet channel. The spray water first enters the lower row of capsules through the liquid inlet channel to fill the lower row of capsules, so that the lower row of capsules expands and bulges to clamp and cover the core (wherein the lower row of capsules will also wipe the drilling fluid adhering to the outer wall of the core); then the spray water The four walls are sprayed and cleaned, and at the same time, the spray water continues to enter the upper row of capsules through the liquid inlet channel, and the upper row of capsules is used to clamp and cover the core. The coring drill bit is accompanied by continuous drilling during the drilling process, and the core has a relative movement relative to the coring drill bit. The upper row of capsules uses this relative movement to rub and wipe the outer wall of the core (mainly to remove the spray water on the outer wall of the core), and then uses the CCD camera to take a picture of the core. The CCD camera sends the captured image information to the external control system, and the staff uses the core picture to obtain the core information, thereby obtaining the core information in a timely and rapid manner. The staff can also adjust the drilling speed of the coring drill bit according to the core information. Compared with the prior art method of obtaining core information after the core is taken out from the coring drill bit, the present invention, on the one hand, can obtain the core information after the core is formed in the coring channel of the coring drill bit, thereby greatly improving the speed of obtaining the core information; on the other hand, since the core information is first obtained by photographing, even if the core is damaged due to mechanical collision or collision during the subsequent drilling process, it does not affect the core information that has been obtained. Compared with the prior art method of obtaining core information, the problem of core breakage caused by mechanical collision is eliminated, thereby improving the accuracy of the core information. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of the cross-sectional structure of the present invention, in which the capsule is not filled with spray water but is received on the inner wall of the coring channel;

[0024] Figure 3 is a cross-sectional structural schematic diagram of another state of the present invention, in which the capsule is in a filled and expanded state;

[0025] Figure 4 is a cross-sectional structural schematic diagram of the present invention in one state, in which the capsule is in a full and expanded state and squeezes the core in the coring channel and covers the periphery of the core;

[0026] Markings in the figure: 1. drill bit body, 2. blade, 3. cutting tooth, 4. coring channel, 5. cooling channel, 6. liquid inlet channel, 7. liquid outlet channel, 8. wiring harness channel, 9. laser probe, 10. lower row of capsules, 11. nozzle, 12. upper row of capsules, 13. CCD camera, 14. core. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with embodiments, which are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in the field without creative work are all within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0029] Combined with Figure 1 To Attachment Figure 4 The drilling method for quickly acquiring core information of the present invention includes a coring drill bit. The drilling method based on the coring drill bit includes the following:

[0030] (1) The laser probe 9 on the coring drill bit is used to detect whether the core 14 in the coring channel 4 on the coring drill bit is a core of a set size; preferably, the laser probe 9 is installed on the inner wall of the coring channel 4, and retaining rings are provided on the inner wall of the coring channel 4 at the upper and lower ends of the laser probe, and the outer edges of the retaining rings extend out of the inner wall of the coring channel 4. The upper and lower ends of the laser probe 9 are shielded by the retaining rings to prevent the drilling fluid from splashing and contaminating the laser probe 9.

[0031] Among them, the laser probe 9 is a limited technical product, including a transmitting end and a receiving end, which are respectively arranged on the side walls corresponding to the coring channel 4. The laser probe 9 is used to detect the cross-sectional size of the core. Because the core may be gravel rather than a complete core during the formation process, the laser probe 9 is used to detect the cross-sectional size of the core.

[0032] In the specific implementation process, multiple transmitting ends and multiple corresponding receiving ends can be respectively arranged along the side wall of the coring channel 4, so as to detect different surfaces of the core, so as to obtain different surfaces of different cores. Preferably, two sets of laser probes 7 are designed.

[0033] Preferably, a harness channel 8 is provided on the drill body 1, and the harnesses of the laser probe 9 and the CCD camera 13 are connected to an external control system through the harness channel 8, so as to transmit data to the control system.

[0034] The laser probe 9 periodically detects the rock core 14 at set time intervals.

[0035] (2) If the laser probe 9 determines that the core does not meet the set size, the coring drill bit drills normally. In this case, the external water source system (mainly composed of a water source, a pipeline and a water pump) does not supply spray water to the liquid inlet channel 6. Due to the lack of spray water inflow, the upper row of capsules 12, the nozzle 11 and the lower row of capsules 10 do not work (that is, the nozzle 11 does not spray water, and the upper row of capsules 12 and the lower row of capsules 10 are not filled with water but are in a compressed state); if the laser probe 9 determines that the core meets the set size, the liquid is supplied to the liquid inlet channel 6 in the coring drill bit. Spray water is discharged, and the spray water fills the lower row of capsules 10 in turn so that the lower row of capsules 10 covers the core 14 in the coring channel 4; then the spray water is transported to the nozzle 11 and sprayed around the core through the nozzle 11; when the spray water is transported to the nozzle 11, the spray water is drained out of the liquid outlet channel 7 of the coring drill bit through the shielding effect of the lower row of capsules 10 and the core 14 and discharged through the liquid outlet channel 7; preferably, the liquid outlet channel 7 is connected to an external water pump through a pipeline, so that the spray water in the liquid outlet channel 7 is pumped out by the suction effect of the external water pump.

[0036] (3) The CCD camera 13 on the coring drill takes pictures of the surroundings of the core 14 in the coring channel and transmits the pictures of the core to an external control system, which analyzes the pictures of the core to obtain core information.

[0037] Among them, how to control the system to analyze the photos obtained by the CCD camera is clear and understandable to the technicians in this field. For example, the control system directly displays the photos taken by the CCD camera through the display module, so that the staff can intuitively see some core information (such as what type of rock the core belongs to); the control system can also perform image processing on the photos of the CCD camera to obtain the core information. For example, the control system uses the technology in a method for quickly obtaining the core recovery rate and RQD value disclosed by the applicant on March 24, 2022 (application number 202210291807.X) to process the photos taken by the CCD camera to obtain the core information, so that the staff can quickly obtain the core information. The staff can also feedback and adjust the drilling process according to the obtained core information, such as adjusting the composition of the drilling fluid according to the obtained core information, adjusting the rotation speed of the coring drill bit, and controlling the down pressure of the coring drill bit, etc., and then regulating and guiding the drilling process according to the obtained core information. In the prior art, the core information can only be obtained after the core 14 is taken out from the coring drill bit, so the stratigraphic structure information of the stratum can only be obtained, and therefore, it can only guide the subsequent drilling process, and cannot play a guiding and regulating role for the current drilling (i.e., the drilling process of the current core). However, the present application can obtain the core information during the drilling process, so it can guide and regulate the current drilling, so as to timely adjust the drilling process (for example, using different drilling fluids, drilling speeds, drilling down pressures, etc. for different geological structures), thereby improving the drilling effect.

[0038] In some embodiments, the CCD camera 13 intermittently photographs the core in the coring channel. That is, the CCD of the present invention intermittently photographs the core 14 in the coring channel 4 (i.e., regardless of whether the nozzle, the upper row of capsules, and the lower row of capsules are involved in the work, the CCD camera 13 intermittently photographs the core 14), thereby obtaining photos of the entire core 14.

[0039] In some embodiments, the control system can obtain the depth of the coring drill, and the control system controls the CCD camera to take pictures according to the depth of the drilling. Since the depth of the coring drill can be known at any time, the drilling depth information can be transmitted to the control system, so that the control system controls the CCD camera 13 to take pictures. For example, the coring drill drills 10 cm and transmits the information to the control system, and the control system controls the CCD camera 13 to take pictures, so as to take pictures of the core within 10 cm of the core section. Among them, the control system described in the present invention is a very conventional technology for the control system that controls the operation of the CCD camera and the laser probe 9, and the technicians in this field can understand and comprehend it, so it will not be repeated here.

[0040] In the specific process of the present invention, there is a situation where the laser probe 9 detects that the cross-sectional size of the core 14 meets the set requirements, but the laser probe detects that the cross-sectional size of the core 14 does not meet the set requirements in the next detection. In this case, the control system can also control whether the water source system passes spray water into the liquid inlet channel 6 (i.e., control whether the nozzle 11, the upper row of capsules 12 and the lower row of capsules 10 are involved in the work) according to the laser probe 9 in the set time range (or the coring drill bit at the set drilling depth).

[0041] That is to say, the working state of the upper row of capsules, the lower row of capsules and the nozzle is closely related to the detection data of the laser probe 9. The working state (or working cycle) of the laser probe is also related to the drilling depth. Therefore, in actual use, the depth of the core drill can be used as a node (because the drilling efficiency will change with the continuous change of the stratum structure, so in order to facilitate control, a depth can be set as a basis for judgment), and the working frequency of the laser probe 9 is set within this depth range (for example, the laser probe detects 5 times for every 10cm of drilling), and then the data detected by the laser probe 9 is used to judge whether the nozzle 11, the upper row of capsules 12 and the lower row of capsules 10 are involved in the work.

[0042] In the specific implementation process of the present invention, when the nozzle 11, the upper row of capsules 12 and the lower row of capsules 10 are converted from a working state to a non-working state, the external water source system should close the liquid inlet channel 6, and at the same time use the external water source system to suck the liquid outlet channel 7, thereby discharging the spray water in the liquid outlet channel 7, the upper row of capsules and the lower row of capsules, so that the upper row of capsules 12 and the lower row of capsules 10 shrink and are stored on the inner wall of the coring channel, thereby preventing the upper row of capsules and the lower row of capsules from contacting the core 14.

[0043] In some embodiments, flow meters are installed in the liquid inlet channel 6 and the liquid outlet channel 7. The flow meters calculate the flow rates in the liquid inlet channel 6 and the liquid outlet channel 7, and transmit the data of the flow meters to the control system. The control system uses the data of the flow meters as one of the reference data to adjust and mix the drilling fluid. Since there may be gaps between the upper row of capsules 12, the lower row of capsules 10 and the core, a small amount of spray water will enter the root of the core 14 from the gap and then mix into the drilling fluid, thereby diluting the drilling fluid. Therefore, the loss of spray water is monitored by the flow meter and used as a basis for adjusting the matching of the drilling fluid.

[0044] Of course, during the actual drilling process, the staff will also test the drilling fluid regularly or irregularly to ensure that the drilling fluid is within the specification requirements.

[0045] In some embodiments, the coring drill bit includes a drill bit body 1 and a joint, the joint is used to connect with the drill rod, the middle part of the drill bit body 1 has a coring channel 4, the drill bit body 1 is provided with a liquid inlet channel 6 and a liquid outlet channel 7 along the length direction of the drill bit body 1, the liquid inlet channel 6 and the liquid outlet channel 7 are respectively connected to the external water source system through pipelines, and the inner wall of the coring channel 4 is provided with a plurality of nozzles 11 for interconnecting with the liquid inlet channel 6 and two rows of capsules for interconnecting with the liquid inlet channel, the two rows of capsules are an upper row of capsules 12 and a lower row of capsules 10, the upper row of capsules 12 and the lower row of capsules 10 can expand and cover the periphery of the core 14 in the coring channel 4 after being injected with water, and the nozzle 11 is installed between the two rows of capsules On the inner wall of the coring channel 4, at least two groups of laser probes 9 corresponding to each other are installed on the coring channel 4 located below the lower row of capsules 10, and a plurality of CCD cameras 13 for photographing the rock cores in the coring channel are installed on the coring channel 4 located above the upper row of capsules 12, and the CCD cameras 13 and the laser probes 9 are electrically connected to an external control system; a liquid outlet interconnected with the liquid outlet channel 7 is provided on the inner wall of the coring channel 4 above the lower row of capsules 10, that is, a liquid outlet interconnected with the liquid outlet channel 7 is provided on the inner wall of the coring channel 4 above the lower row of capsules, and when the lower row of capsules 10 is coated on the periphery of the core 14, the shielding effect of the lower row of capsules 10 can enable the spray water to flow to the liquid outlet, and thus be discharged through the liquid outlet channel 7. When the lower row of capsules 10 is coated on the periphery of the core 14 , the lower row of capsules 10 can also wipe the periphery of the core 14 , thereby preventing the debris and drilling fluid coated on the core 1 from entering the upper part of the lower row of capsules 10 and blocking the liquid outlet.

[0046] Preferably, the liquid outlet is provided with a filter screen, which prevents debris and impurities from clogging the liquid outlet.

[0047] The upper row of capsules 12 and the lower row of capsules 10 of the present invention are made of latex with a certain elasticity, and each capsule is in a semi-ring shape, so that the two capsules can form an annular structure and cover the periphery of the core 14.

[0048] Preferably, the side end surface of each capsule is provided with or coated with a non-elastic material, so that the side end surface of the capsule does not have the characteristic of deformation, so as to facilitate better fit between the two capsules and minimize the outflow of spray water from the side end surfaces of the two capsules. The surface of the capsule used for contacting the core 14 is coated with a wear-resistant layer to prevent the capsule from being damaged during contact with the core 14 and to increase the service life of the capsule.

[0049] In the specific implementation process, the inner wall of the coring channel 4 is provided with installation cavities of different shapes and sizes to facilitate the installation of the upper row of capsules, the lower row of capsules, the nozzle, the laser probe and the CC camera.

[0050] In the specific implementation process, the liquid inlet channel, the liquid outlet channel and the wiring harness channel can be processed first and then blocked with a plug, so as to facilitate the formation of the required liquid inlet channel, liquid outlet channel and wiring harness channel.

[0051] The drill bit body 1 of the present invention is also provided with a cooling channel 5, through which drilling fluid is input to cool the cutting teeth 3. The design of the cooling channel 5 of the present invention can prevent the drilling fluid from corroding and eroding the core.

[0052] Combined with Figure 1 To Attachment Figure 4 In some embodiments, the liquid inlet channel 6 delivers the spray water to the lower row of capsules 10 , the nozzle 11 and the upper row of capsules 12 in the order of the lower row of capsules 10 , the nozzle 11 and the upper row of capsules 12 .

[0053] In some embodiments, pressure valves for cutting off or connecting the liquid inlet channels are provided between the liquid inlet channel 6 between the lower row of capsules 10 and the nozzle 11, and between the nozzle 11 and the upper row of capsules 12. That is, the pressure valves are used for control to ensure that the lower row of capsules can be filled so as to cover the periphery of the core 14; and to ensure that the nozzle 11 has sufficient pressure to spray and wash the outer wall of the core 14.

[0054] In some embodiments, the upper row of capsules 12 and the lower row of capsules 10 are both provided with an inlet and an outlet, the inlet of the lower row of capsules 10 is connected to the liquid inlet channel 6, the outlet of the lower row of capsules 10 is connected to the nozzle 11 through the liquid inlet channel, the outlet of the upper row of capsules 12 is connected through a reflux channel opened in the drill bit body, the reflux channel is connected to the liquid inlet channel, a pressure valve and a one-way valve are installed in the reflux channel, the pressure valve and the one-way valve can ensure that the spray water does not flow in the opposite direction, and can flow to the liquid inlet channel again only after reaching the set value, thereby ensuring that the water pressure in the lower row of capsules, the nozzle and the upper row of capsules is within the set range.

[0055] During use, the drilling method for quickly acquiring core information of the present invention first detects the size of the core through a laser probe. If the cross-sectional size of the core in this section does not meet the design requirements, the coring drill bit continues drilling until the laser probe detects that the size of the core meets the set requirements. The laser probe transmits the information to an external control system, and the external control system controls an external water pump to input spray water of a certain pressure into the liquid inlet channel. The spray water first enters the lower row of capsules through the liquid inlet channel to fill the lower row of capsules, so that the lower row of capsules expands and bulges to clamp and cover the core (wherein the lower row of capsules will also wipe the drilling fluid adhering to the outer wall of the core); then the spray water The four walls are sprayed and cleaned, and at the same time, the spray water continues to enter the upper row of capsules through the liquid inlet channel, and the upper row of capsules is used to clamp and cover the core. The coring drill bit is accompanied by continuous drilling during the drilling process, and the core has a relative movement relative to the coring drill bit. The upper row of capsules uses this relative movement to rub and wipe the outer wall of the core (mainly to remove the spray water on the outer wall of the core), and then uses the CCD camera to take a picture of the core. The CCD camera sends the captured image information to the external control system, and the staff uses the core picture to obtain the core information, thereby obtaining the core information in a timely and rapid manner. The staff can also adjust the drilling speed of the coring drill bit according to the core information. Compared with the prior art method of obtaining core information after the core is taken out from the coring drill bit, the present invention, on the one hand, can obtain the core information after the core is formed in the coring channel of the coring drill bit, thereby greatly improving the speed of obtaining the core information; on the other hand, since the core information is first obtained by photographing, even if the core is damaged due to mechanical collision or collision during the subsequent drilling process, it does not affect the core information that has been obtained. Compared with the prior art method of obtaining core information, the problem of core breakage caused by mechanical collision is eliminated, thereby improving the accuracy of the core information.

Claims

1. A drilling method for quickly acquiring core information, comprising a coring drill bit, characterized in that: The drilling method based on the coring drill bit includes the following: (1) Using a laser probe on the coring drill bit to detect whether the core in the coring channel on the coring drill bit is a core of a set size; (2) If the laser probe determines that the core does not meet the set size, the coring drill bit drills normally; if the laser probe determines that the core meets the set size, spray water is output to the liquid inlet channel of the coring drill bit, and the spray water fills the lower row of capsules in turn so that the lower row of capsules covers the core in the coring channel; then the spray water is delivered to the nozzle and sprayed around the core through the nozzle; when the spray water is delivered to the nozzle, the spray water is drained out of the liquid outlet channel of the coring drill bit through the shielding effect of the lower row of capsules and the core and discharged through the liquid outlet channel; (3) The CCD camera on the coring drill takes pictures of the surroundings of the core in the coring channel and transmits the pictures of the core to an external control system, which analyzes the pictures of the core to obtain core information; The coring drill bit comprises a drill bit body and a joint, wherein the middle part of the drill bit body is provided with a coring channel, and the drill bit body is provided with a liquid inlet channel and a liquid outlet channel along the length direction of the drill bit body, wherein the liquid inlet channel and the liquid outlet channel are respectively connected to an external water source system through pipelines, and a plurality of nozzles for interconnecting with the liquid inlet channel and two rows of capsules for interconnecting with the liquid inlet channel are installed on the inner wall of the coring channel, wherein the two rows of capsules are an upper row of capsules and a lower row of capsules, wherein the upper row of capsules and the lower row of capsules can expand and cover the periphery of the core in the coring channel after water is injected, wherein the nozzle is installed on the inner wall of the coring channel between the two rows of capsules, wherein at least two groups of laser probes corresponding to each other are installed on the coring channel below the lower row of capsules, wherein a plurality of CCD cameras for taking pictures of the core in the coring channel are installed on the coring channel above the upper row of capsules, wherein the CCD cameras and the laser probes are electrically connected to an external control system, and wherein a liquid outlet interconnected with the liquid outlet channel is provided on the coring channel above the lower row of capsules.

2. The drilling method for quickly acquiring core information according to claim 1, characterized in that: The CCD camera takes pictures of the cores in the coring channel at intervals.

3. The drilling method for quickly acquiring core information according to claim 2, characterized in that: The control system can obtain the drilling depth of the coring drill bit, and the control system controls the CCD camera to take pictures according to the drilling depth.

4. The drilling method for quickly acquiring core information according to claim 1, characterized in that: Flow meters are installed in the liquid inlet channel and the liquid outlet channel. The flow rates in the liquid inlet channel and the liquid outlet channel are calculated by the flow meters, and the data of the flow meters are transmitted to the control system. The control system uses the data of the flow meters as one of the reference data to adjust and match the drilling fluid.

5. The drilling method for quickly acquiring core information according to claim 1, characterized in that: The liquid inlet channel delivers the spray water to the lower row of capsules, the nozzle and the upper row of capsules in the order of the lower row of capsules, the nozzle and the upper row of capsules.

6. The drilling method for quickly acquiring core information according to claim 5, characterized in that: Pressure valves for cutting off or connecting the liquid inlet channels are provided between the liquid inlet channel between the lower row of capsules and the nozzle, and between the liquid inlet channel between the nozzle and the upper row of capsules.

7. The drilling method for quickly acquiring core information according to claim 6, characterized in that: The upper row capsules and the lower row capsules are both provided with an inlet and an outlet, the inlet of the lower row capsules is connected with the liquid inlet channel, the outlet of the lower row capsules is connected with the nozzle through the liquid inlet channel, the outlet of the upper row capsules is connected through a reflux channel opened in the drill body, the reflux channel is connected with the liquid inlet channel, and a pressure valve and a one-way valve are installed in the reflux channel.

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