1385results about "Core removal" patented technology

The invention relates to the field of constructional engineering concrete detection, in particular to a reamer bit and a concrete repairing method.The reamer bit comprises a mounting base, at least two drill arms and at least two supporting rods; one end of the drill arm is hinged with the mounting seat, a fixing pipe is arranged between the hinge points of the drill arm and the mounting seat, the fixing pipe is connected with a positioning rod in a sliding manner, one end of the supporting rod is hinged with the positioning rod, and the other end of the supporting rod is hinged with the drill arm. When the reamer bit is used, the angle of the drill arm can be flexibly adjusted by pressing the positioning rod, the hole diameter of a reaming hole can be accurately controlled according to actual repairing requirements, and the reamer bit is suitable for repairing scenes of coring holes of different sizes and depths; the formed horn mouth with the wide inside and the narrow outside can be embedded into original concrete like a tenon after concrete is poured, the combining capacity of new concrete and old concrete is greatly improved, and it is guaranteed that a repaired area is not prone to separation.

The invention discloses a continuous deflecting coring method for realizing wire-line coring orientation, which relates to the technical field of drilling, and specifically comprises the following steps of: selecting a bent screw drill and a matched wire-line coring tool according to geological conditions and a designed drilling track, assembling and connecting the bent screw drill and the matched wire-line coring tool, and putting the bent screw drill and the matched wire-line coring tool into a drilling hole; in the drilling process, the hole bottom power drilling tool provides drilling power, a bent angle of the bent screw drilling tool enables a drilled hole to be inclined according to the design direction, and a rotor cavity of the hollow screw drilling tool allows an internal assembly and a core barrel to pass through. According to the continuous deflecting coring method for wire-line coring orientation, the high-precision directional drilling technology and the wire-line coring technology are organically combined, the problem of exploration of irregular deposited ore deposits and concealed ore deposits is solved, the precision and efficiency of geological exploration are improved, and by adopting the bent screw drill and the matched wire-line coring tool, the geological exploration efficiency is improved. Continuous directional drilling and continuous wire-line coring are carried out at the same time, the number of times of drill lifting is reduced, and the auxiliary time is shortened.

The invention discloses rock crushing and coring equipment for geotechnical engineering investigation, and belongs to the technical field of drilling equipment. The rock crushing and coring equipment for geotechnical engineering investigation comprises a drilling tool, a sampling barrel and a high-pressure water supply device, and further comprises a triggering part, a coring part and a control part, and the triggering part is arranged at the end, away from a drill bit of the drilling tool, of the sampling barrel; a first sliding groove is formed in the water flow reversing part, the high-pressure water supply device communicates with a water outlet in the drill bit through the water flow reversing part, the water flow reversing part communicates with the first sliding groove, and the water flow reversing part is used for communicating the high-pressure water supply device with the first sliding groove when the triggering part is triggered; one end of the sliding sleeve is hermetically and slidably connected into the first sliding groove; the cut-off part is connected with the other end of the sliding sleeve, and when high-pressure water is introduced into the first sliding groove, the sliding sleeve drives the cut-off part to move into the sampling barrel. According to the rock crushing and coring equipment for geotechnical engineering investigation, the drill bit can be cooled by using high-pressure water, the abrasion of the drill bit is reduced, and a rock core is cut off by using the high-pressure water as power, so that the integrity of the obtained rock core can be ensured.

The invention provides an operation control method, system and equipment of a coring drilling machine and a program product. The method comprises the steps that geological information of a construction area is obtained, and geological features are analyzed; constructing rock stratum partitions and predicting the rock stratum depth; configuring partition features and predicting a drilling scheme; constructing a prediction data transmission scheme; controlling the preset coring drilling machine to drill the construction area and obtain actual drilling data, and analyzing rock stratum data from the actual drilling data; and selecting a reference rock stratum partition, and performing operation and data transmission based on the prediction drilling scheme and the prediction data transmission scheme of the reference rock stratum partition. According to the method, accurate prediction of geological information is matched with dynamic adjustment of data transmission, the rock stratum condition is mastered dynamically and accurately, the stability and timeliness of data transmission in the operation process are improved while accurate and efficient operation of the coring drilling machine is guaranteed, most of data analysis and decision-making processes are completed intelligently, and the working efficiency of the coring drilling machine is improved. And the automation level of operation is improved.

The utility model belongs to the technical field of exploration drilling tools, in particular to a geological coring drilling tool capable of realizing continuous drilling along with a casing, which comprises a casing body, a drill rod sleeved in the casing body, a female joint fixedly connected to the bottom end of the drill rod, a male joint in threaded connection to the bottom end of the female joint, a reaming shell fixedly connected to the bottom end of the male joint, and a drilling rod connected with the reaming shell. A reaming drill bit is arranged on the surface of the reaming shell, an adjusting mechanism is arranged between one side of the reaming drill bit and the interior of the reaming shell, and fixing rods are fixedly connected to the two sides of the bottom of the reaming shell. The external expanding drilling diameter of the expanding drill bit can be adjusted, so that holes with different sizes can be drilled according to requirements, the drilling device is more flexible in use and very convenient and rapid to adjust, in addition, the pilot hole drill bit can be conveniently disassembled and assembled, and the drilling efficiency is improved. Therefore, the damaged collar hole drill bit can be independently detached to be replaced, operation is easy, and the maintenance cost is saved.

The invention discloses a core rock sampling automatic identification system and method based on image processing and machine learning. The system comprises a drilling assembly, a sensor assembly, a measurement and control lamp assembly, an identification assembly, a relay assembly and a control and display assembly. The method comprises the steps that core rock drilling is conducted, and a core rock sample is obtained through extraction; core rock sample images are collected, and parameters in the drilling process are monitored; sorting physical and appearance characteristics of the obtained core rock sample and the core rock sample image, and storing the physical and appearance characteristics in a database; preprocessing the acquired core rock sample image, and extracting key features; training by using a machine learning algorithm to obtain a core rock category recognition model; and applying the core rock category identification model obtained by training to newly obtained core rock sample image data to obtain classification and identification results. According to the method, the sensor, image processing and the convolutional neural network are combined, automatic and real-time rock core recognition is realized, the recognition efficiency and accuracy are improved, and the method can be flexibly applied to a field environment.

A coring drilling device for mine exploration sampling comprises an outer drilling barrel, a coring drilling barrel, a sample outlet barrel and a driving mechanism, the outer drilling barrel is used for drilling geology, and the sample outlet barrel is arranged on the inner side of the outer drilling barrel and is in axial sliding connection with the outer drilling barrel so that rotating power on the outer drilling barrel can be transmitted to the sample outlet barrel, and the sample outlet barrel can rotate along with the outer drilling barrel; the sampling barrel and the outer drilling barrel can be split in the axis direction, the coring drilling barrel is used for coring drilling of a rock core generated by drilling of the outer drilling barrel and arranged in the middle of the sampling barrel, a sampling gap is formed between the sampling barrel and the coring drilling barrel, a sampling piece is arranged in the sampling gap, and the driving mechanism is connected with the outer drilling barrel and the coring drilling barrel. The driving mechanism drives the outer drilling barrel to rotate relative to the coring drilling barrel, so that core chips generated by drilling are output upwards in the axial direction of the sample outlet barrel through the sample outlet piece in the drilling process.

Methods and systems are disclosed. The methods may include determining a first sequence of permeabilities by subjecting a rock sample to a first sequence of confining stress, axial stress, pore pressure (CSASPP) triplets and determining a first rock parameter using the first sequence of permeabilities, the first sequence of CSASPP triplets, and a first permeability model. The methods may further include determining a second sequence of permeabilities by subjecting the rock sample to a second sequence of CSASPP triplets and determining a second rock parameter using the second sequence of permeabilities, the second sequence of CSASPP triplets, and the first permeability model. The method may still further include determining an in situ permeability for an in situ rock based on an initial permeability, a second stress sensitivity parameter, a first stress sensitivity parameter, a confining stress value, axial stress values, a pore pressure value, and a second permeability model.

The systems and methods presented herein include a sidewall coring tool assembly that includes a coring shaft having an internal cavity and configured to be coupled to a coring motor shaft of a coring motor at a first axial end of the coring shaft. The coring shaft includes a plurality of scoops disposed circumferentially on a first external surface of the coring shaft. Each scoop of the plurality of scoops forms a conduit from an exterior of the coring shaft to an interior of the coring shaft. The sidewall coring tool assembly also includes a coring bit coupled to the coring shaft at a second axial end of the coring shaft. The sidewall coring tool assembly further includes a static sleeve coupled to the coring motor and disposed radially within the internal cavity of the coring shaft.

Apparatus and methods for determining caprock integrity. The testing apparatus for performing the method including a core container in fluid communication with an upstream reservoir and an upstream pump, and further in fluid communication with a downstream reservoir and a downstream pump. The method including determining threshold hydraulic gradient of a caprock core sample using the testing apparatus.

The invention discloses a sand field coring method, which relates to the technical field of geological exploration, and comprises the following steps: S1, moving a drilling machine to a coring position and fixing, and adjusting the posture of the drilling machine according to the sand field terrain and coring requirements; s2, drilling tools are selected to be assembled according to the sand ground stratum characteristics, wherein the drilling tools comprise but are not limited to a hard rock trepanning drill bit, a drill rod and a sampling pipe; and S3, the hard rock trepanning drill bit is adopted to implement initial drilling, and a stable orifice is formed by controlling the drilling speed and pressure. According to the sand field coring method, the stable hole opening is formed through the hard rock trepanning drill bit, the drilling parameters are dynamically adjusted, complex stratum conditions are effectively dealt with, the coring success rate is remarkably increased, the integrity and representativeness of samples are ensured, the drilling efficiency and the equipment utilization rate are optimized through the technological method, and the sand field coring efficiency is improved. And the Kalman filtering algorithm is adopted to carry out fusion processing on multi-sensor data, and the output of the hydraulic system is adjusted in real time, so that the drilling efficiency is improved.

The invention provides a portable engineering exploration drilling machine for rock core drilling and a drilling coring method.The portable engineering exploration drilling machine comprises a drilling machine base, a lifting system, a power head assembly, a clamping mechanism and an operation table, the power head assembly comprises a power head and a driving mechanism, and the power head comprises a driving main shaft of a hollow structure; the torque transmission device is configured for torque transmission, axial feeding and / or coring of the drill rod; the power head is arranged on the sliding frame, and a third driving mechanism is configured to drive the power head to conduct limited translation in the direction perpendicular to the axis of the drill rod so that the power head can be freely switched between the first position and the second position. According to the drilling machine, translation of the power head can be achieved, drilling of engineering investigation construction can be met, standard penetration testing can be conducted, and the working efficiency and the construction progress are improved; and due to the structural design of the hollow mandrel, the coring work is facilitated, and the labor intensity of operators is greatly reduced.

The monitoring control system comprises a high-definition image acquisition module, a measurement-while-drilling module, a coring drilling machine working parameter acquisition module, a data receiving and processing module, a control operation module, a man-machine interaction display module, a central algorithm module and a cloud platform module. The invention further discloses a control method of the pile foundation coring drilling machine monitoring control system. The measurement-while-drilling module collects the rotating torque and the azimuth angle in the drilling process of a coring drill barrel in real time and provides comprehensive data support, the data receiving and processing module and the central algorithm module conduct real-time processing and analysis on collected data, automatic marking and feature recognition are conducted on each section of core sample, and therefore the core sampling accuracy is improved. And the coring drilling is controlled through the control operation module, so that the integrity of a core sample, the accuracy of coring detection and the authenticity of the core sample are improved through collection and automatic control of working data, and reliable data support is provided for subsequent pile body quality evaluation.

A method may include performing, by a drilling system, a drilling operation to produce a wellbore in a geological region of interest. The method may further include determining time elapse data describing an amount of time between the drilling operation and a hydraulic stimulation operation. The method may further include determining borehole stress data based on the wellbore, reservoir data, and geological data. The method may further include determining thermal diffusivity data regarding a temperature front in the geological region of interest based on the time elapse data, the reservoir data, and the geological data. The method may further include determining a wellbore breakdown pressure of the geological region of interest based on the thermal diffusivity data, the geological data, the borehole stress data, and the reservoir data. The method may further include transmitting a command to a stimulation control system based on the wellbore breakdown pressure.

The invention discloses a directional deflecting wire-line coring drilling device and a directional deflecting wire-line coring drilling method, relates to the field of drilling of soil layers or rocks, and solves the problems that an existing drilling device is high in deflecting direction control difficulty and small in deflecting amplitude. According to the technical scheme, the directional deflecting wire-line coring drilling device comprises a deflecting short section, a top short section and a bottom short section, the top short section and the bottom short section are arranged at the upper end and the lower end of the deflecting short section, a drill rod connector is arranged at the upper end of the top short section, and the lower end of the bottom short section is connected with a hollow motor. A cylindrical coring cavity is formed in the top short section, the deflecting short section, the bottom short section, the hollow motor and the drill bit; the top short section and the deflecting short section, every two adjacent deflecting short sections and the deflecting short section and the bottom short section are connected through deflecting connecting structures, two pull rope holes are formed between the top short section and the upper end face and the lower end face of each deflecting short section, pull ropes penetrate through the pull rope holes, and the postures of the deflecting connecting structures can be adjusted through the pull ropes. And linear drilling and directional drilling are realized.

Device (10) for guiding a user to mark a core sample (12) carried by a core tube (14), the device (10) including: a housing (20) mountable relative to the core sample (12) or the core tube (14) and having a marking guide (22) configured to be arranged adjacent the core sample (12) to guide marking; a communications module (26) operable to communicate with the downhole tool (16) to receive data; a user interface (28) operable to convey perceptible feedback to the user; and a processor (30) and associated memory (32). The processor (30) is configured to store data in the memory (32) and determine a marking position based on the data, and operate the user interface (28) to direct the user to cause relative rotation of the marking guide (22) and the core sample (12) so that the marking guide (22) is aligned with the marking position, allowing the user to use the marking guide (22) to mark the core sample (12) at the marking position.

A roof presplitting drilling parameter determination method for preventing rock burst of a working face comprises the steps of determining an impact danger area of the working face according to a working face impact danger evaluation report, drilling a roadway roof in the impact danger area to take a rock core, and determining the lithology and thickness of a roof rock stratum and the distance to a coal seam. Determining a key layer position according to a key layer theory; carrying out strike presplitting blasting on a top plate with an impact dangerous area on the working surface along the strike of the roadway, wherein strike presplitting drill holes are arranged every 10-15m along the strike of the roadway; tilt presplitting blasting is carried out on a top plate with an impact dangerous area on a working face along the tendency of a roadway, a group of inclined presplitting drill holes are arranged every 10-15 m along the trend of the roadway, each group comprises n inclined presplitting drill holes, and n is larger than or equal to 2. According to the method, the pre-splitting drilling parameters are accurately determined, the coal seam roof is accurately broken, a better pressure relief effect is achieved, rock burst is prevented in advance, and safe production of a mine is guaranteed.

The invention discloses a two-way sampling device for geological exploration based on pit exploration and a sampling method.The two-way sampling device comprises a mounting frame with a movable seat at the bottom, a main shaft system, an auxiliary shaft drilling system and a hydraulic propelling system are mounted on the mounting frame, and the main shaft system and the auxiliary shaft drilling system are connected through a magnetic coupler; the main shaft system drives the auxiliary shaft drilling system to rotate through the magnetic coupler, and the hydraulic propelling system pushes the auxiliary shaft drilling system to horizontally move, so that the auxiliary shaft drilling system performs sampling operation. According to the two-way sampling device for geological exploration based on pit exploration, single-side sampling or double-side simultaneous sampling can be achieved, the sampling efficiency is high, the whole device can be stabilized through the sampling pipes on the two sides during sampling, manpower can be saved, equipment damage caused by too large load can be avoided, the maintenance cost is reduced, and the sampling efficiency is improved. And the hardness of rocks on the two sides can be compared through the spindle system, working efficiency is high, operation is easy, and use is convenient.

The invention belongs to the technical field of moon sampling, and provides a casing type laser-assisted coring drilling tool for a moon-based extreme environment, which comprises a drill bit, a base, a laser head, a drill rod, a coring pipe and a motor, the bottom of the base is rotatably connected with a drill rod. The bottom of the drill rod is fixedly connected with a drill bit. A coring pipe is coaxially arranged in the drill rod, and an annular cavity is formed between the outer side face of the coring pipe and the inner side face of the drill rod. A laser head is mounted in the base; the laser head is located above the annular cavity, and laser emitted by the laser head penetrates through the annular cavity and is emitted out of the drill bit. Aiming at the lunar-based environment, through the synergistic mechanism of mechanical rotary rock breaking and laser-assisted softening, the lunar rock is softened by means of laser energy, the mechanical cutting resistance of the drill bit is greatly reduced, and efficient and continuous coring operation is achieved; the key technical problems that a traditional drilling tool is difficult in space arrangement, low in efficiency and the like are solved, and the efficiency of the lunar geology coring task and the rock sample fidelity are remarkably improved.

The invention provides a rotary impact type ultrasonic sampling device for deep rocks, which relates to the technical field of drilling and coring and comprises an anchoring unit, a feeding unit, a rotary unit, an impact unit and a coring unit which are sequentially connected from top to bottom. The device has the beneficial effects that the sampling device is firstly placed in a rock hole, and each anchoring tooth is fixed in the rock hole; then an ultrasonic transducer of the impacting unit and a motor of the rotating unit drive a drilling barrel to rotationally impact the rock, an electromagnet of the feeding unit drives a hydraulic cylinder to push the drilling barrel to drill downwards, the rock core enters the drilling barrel, and after the rock core in the drilling barrel reaches the needed length, the rock core pushes a push plate to move upwards to drive the lower end of a limiting rod to release a sliding block; the sliding block drives the core cutting rope to contract inwards to be in attached contact with a rock core, the core cutting rope cuts off the lower end of the rock core along with rotation of the drilling barrel, and therefore automatic drilling and coring can be achieved, coring operation is completed, the integrity of a rock core sample is guaranteed, and the core cutting device is particularly suitable for coring of deep hard rock.

The invention provides a multifunctional exploration drilling machine integrating drilling, standard penetration and testing and a drilling and standard penetration method. The drilling machine comprises a base, a mast assembly, a power head assembly, a hoisting mechanism and a standard penetration testing mechanism. The power head assembly is arranged to freely slide along a first direction and perform limited translation between a first position and a second position along a second direction perpendicular to the first direction; the driver comprises a parallel type power motor which provides torque for the driving mandrel. According to the exploration drilling machine, drilling, coring and standard penetration testing work can be completed at the same time only through one exploration drilling machine, the working process is greatly simplified, and the labor efficiency is improved.

The invention discloses rock core drilling sampling equipment for geological disaster investigation, and relates to the technical field of sampling, and the rock core drilling sampling equipment comprises a composite mechanism. According to the rock core drilling and sampling equipment for geological disaster investigation, through the design of a composite mechanism, the motor is connected with the butt joint block, and the drill rod is inserted into the inner side of the butt joint block, so that drilling and sampling are conducted on rocks, in the drilling process, the movable frame slides on the outer side of the sliding column so as to ascend and descend, and therefore the work requirement is met; a drill bit mechanism is arranged on the outer side of the drill rod, large rocks are crushed through the drill bit mechanism in the drilling process, meanwhile, rock blocks are guided to enter the inner side of the drill rod, so that a sample is taken out when the movable frame body is lifted subsequently, subsequent treatment is facilitated, and after sampling is finished, the drill bit mechanism is used for crushing the large rocks and guiding the rock blocks to enter the drill rod. When the sample is taken out from the inner side of the drill rod, the sample is taken out more cumbersomely and difficultly, the pushing and pressing mechanism is pressed by the electric push rod, so that the effect of discharging the sample is achieved, and normal operation of equipment is kept.

The utility model discloses a broken soft coal bed pneumatic airtight coring device which comprises a coring outer cylinder, a coring drill bit and an adapter. A pressing ball seat is arranged in the adapter, a locking mechanism core pipe is arranged in the lower end of the pressing ball seat in a sleeved mode, and the locking mechanism core pipe is further sleeved with a force storage mechanism body pipe capable of moving in the axial direction. The lower end of the power storage mechanism main body pipe is connected with the coring inner cylinder through a power storage mechanism main body pipe extension section capable of axially moving; a limiting step is arranged on the outer wall of the force storage mechanism body pipe, a locking sliding sleeve is further arranged outside the force storage mechanism body pipe in a sleeving mode, and a force storage spring is further arranged between the limiting step and the locking sliding sleeve in an abutting mode. A locking ball is embedded in the pipe wall of the lower end of the force storage mechanism body pipe and can axially limit the locking sliding sleeve. A sealing ball valve is arranged in the coring inner cylinder, and the pushing cylinder can be pushed by the locking sliding sleeve to move in the axial direction to close the sealing ball valve. The closed coring device solves the problems of hole spraying, hole collapse and the like when an existing closed coring device is used in a broken soft coal seam.

The invention relates to the technical field of ore mining, in particular to a rock core drilling sampling device for ore mining, which comprises a bottom plate, universal pulleys are mounted at four corners of the lower end of the bottom plate respectively, a lifting mechanism is mounted on one side of the upper end of the bottom plate and is in driving connection with a motor, and a sampling drill cylinder is clamped at the output end of the motor. A picking assembly is installed at the lower end in the sampling drill barrel, a through hole corresponding to the sampling drill barrel is formed in the center of the bottom plate, a spraying assembly acting on one side of the through hole is installed at the upper end of the bottom plate, gradienters are installed on the periphery of the upper end of the through hole, and height adjusting assemblies are installed on the periphery of the bottom plate. The device has the advantages that a rock core can be conveniently taken out of a drill hole through the picking assembly, and use is convenient; the four height adjusting assemblies are matched with the four corresponding gradienters, so that the bottom plate can be conveniently adjusted to be in a horizontal state, and the sampling drill barrel can conveniently and vertically drill holes.

A method for recovery of residual coal pillars by freezing accumulated water in room-and-pillar mining areas is provided. A feasibility of repeated mining of residual coal pillars in room-and-pillar goafs is distinguished based on production data and exploration data of a mine. An accumulated water in the room-and-pillar mining areas is frozen to replace a paste filling material, which envelopes collapse roofs and gangues in the room-and-pillar goaf as a whole. The room-and-pillar goaf is filled with a frozen ice body. Roadways and mining faces are arranged in the frozen ice body. Coal cutter cuts the residual coal pillars and the frozen ice body. With the advancing of the mining face, the residual coal pillars are gradually recovered and melted water after the cutting is pumped out.

The invention discloses an in-situ coring system and method for a soft rock extension roadway bottom plate. The system comprises a stable anchoring base, a drilling driving and propelling module, a stress adjusting module, a low-disturbance coring module, a rock core in-situ packaging and fidelity module and an intelligent integrated control unit. The stable anchoring base is used for fixing the system on a roadway bottom plate; the drilling driving and propelling module provides rotating power and axial feeding force for the drilling tool; the stress adjusting module is used for adjusting the stress state around the rock core; the low-disturbance coring module comprises a composite function coring drill bit and a double-layer coring pipe, and low-disturbance cutting and containing of a rock core are achieved. The rock core in-situ packaging and fidelity module is used for sealing and packaging the rock core in real time; and the intelligent integrated control unit adaptively controls the coring process according to sensor data. According to the invention, low-disturbance, high-precision and in-situ fidelity rock core acquisition of the soft rock roadway bottom plate can be realized, and the problems of large soft rock coring disturbance, difficulty in fidelity, low intelligent degree and the like are effectively solved.

The invention discloses a reinforcement grouting method for a large-scale high-pressure water-rich alteration tectonic zone. The invention aims to solve the technical problem that inrush is easily caused in a construction environment of a large-scale high-pressure water-rich alteration structural belt with poor self-stability. The anchoring capacity of the grout-stopping wall can be improved through the embedded steel bars embedded in the surrounding rock and the wall body, it is guaranteed that the grouting pressure can be resisted during high-pressure grouting, the grout-stopping wall is prevented from being extruded to retreat, and therefore the stability of the tunnel face is guaranteed. Besides, before reinforcing grouting of the unstable stratum, the grout stopping wall is reinforced in advance, so that a stress whole is formed between the grout stopping wall and surrounding rock in front of the grout stopping wall, and therefore the inrush prevention capacity of the grout stopping wall and the drawing resistance of the orifice pipe are improved. In addition, the orifice pipe is arranged before drilling grouting is started, and the orifice pipe can serve as a guide pipe and a grouting connector and can resist high-pressure grouting counter-acting force through large friction force generated after anchoring of the orifice pipe. And the grouting holes in different positions are selected for selection verification of the grout and the grouting mode, so that the stratum can be better reinforced, and the safety of subsequent excavation construction is ensured.

The invention belongs to the technical field of oil and gas drilling, and particularly relates to a coring device. The coring device comprises an outer barrel assembly and a coring drill bit fixedly arranged at the lower end of the outer barrel assembly. The coring device further comprises an inner barrel assembly arranged in the outer barrel assembly in a sleeved mode. The first core catcher is arranged at the lower end of the inner cylinder assembly, and the first core catcher can be matched with a coring drill bit after moving downwards, radially contracts and cuts a core in the coring device; wherein a second core catcher is further arranged between the inner barrel assembly and the first core catcher, the two radial sides of the second core catcher are shielded by the inner barrel assembly and the retractable core catcher respectively, and after the inner barrel assembly moves upwards relative to the first core catcher, the second core catcher makes contact with a core in the coring device and cuts the core. The method can be suitable for unconsolidated stratums and hard stratums at the same time.

The utility model provides a mineral resource exploration drilling device, which relates to the technical field of geological drilling and comprises a rotary drum and a driving mechanism capable of driving the rotary drum to rotate and descend at the same time, and a sampling space for accommodating ores is formed in the middle of the rotary drum; the rotary drum is in sliding connection with a plurality of impact nails capable of impacting ores in the sampling space, the rotary drum is further in sliding connection with a pressing rod capable of driving the impact nails to move in the horizontal direction, the pressing rod is arranged in the vertical direction, and the contact surface of the pressing rod and the impact nails is an inclined surface. The device is convenient to operate, can be suitable for being used in field complex terrains, can realize the extraction work of the whole ore after drilling is finished, and can realize the extraction work of the ore with the specified depth according to actual requirements, so that the subsequent exploration of mineral resources is facilitated.

A device for orienting core samples relative to their position in the subsoil before extraction, attaching to a core bit during drilling features a robust tubular body with a detector to identify core sample breakage and orientation using triaxial accelerometers and gyroscopes, measuring orientation by the gravity vector or true north. An electronic control unit stores, timestamps, and transmits data wirelessly via BLUETOOTH®, ensuring data reliability without removing the device. The device includes adapters for different pipe diameters, minimizing the need for disassembly and reducing user fatigue, while maintaining pump functionality with a bypass valve if needed