504results about "Core removal" patented technology

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 utility model relates to the technical field of well drilling coring, and discloses an elastic self-driven pressure maintaining coring tool which comprises a shell, a coring drill bit is fixedly arranged at the front end of the shell, an inner barrel and a coring assembly are sequentially and coaxially arranged in the shell, the rear end of the inner barrel is closed and fixedly connected with the shell, and a pressure maintaining device is arranged at the front end of the inner barrel. The coring assembly comprises a main spring, a positioning cylinder, a coring cylinder, a footage rod and a locking device, the main spring is used for providing pulling force towards the rear end of the inner cylinder for the positioning cylinder, one end of the coring cylinder is rotatably connected with the front end of the positioning cylinder, and the locking device is used for limiting the positioning cylinder to move towards the rear end of the inner cylinder; the footage rod penetrates through the front end of the positioning cylinder and is in sliding connection with the positioning cylinder, the footage rod is matched with the locking device, and when the footage rod slides towards the rear end of the positioning cylinder, limiting of the locking device to the position between the positioning cylinder and the inner cylinder can be relieved; according to the tool, the coring barrel can automatically return to the inner barrel when the footage is in place, and pressure-maintaining and fidelity coring of a deep rock stratum can be achieved.

The invention relates to a thermochemical energy-storage heat-preservation coring device and method for oil and gas coring, magnesium sulfate heptahydrate is preset in an interlayer of a heat-preservation cylinder of the coring device, the underground temperature is stored by utilizing dehydration and heat absorption of the magnesium sulfate heptahydrate, and then the stored heat energy is released by utilizing water absorption and heat release of the magnesium sulfate to carry out core heat preservation. The thermochemical energy storage thermal insulation structure comprises a thermal insulation cylinder and a thermal insulation trigger device, wherein a thermochemical energy storage material and reactant water are placed in an interlayer in the thermal insulation cylinder; the heat preservation trigger device comprises a trigger probe, a self-trigger and a trigger spring. The underground temperature is stored through dehydration and heat absorption of the magnesium sulfate heptahydrate, the stored heat energy is released through water absorption and heat release of the magnesium sulfate for rock core heat preservation, and extra energy supply is not needed; meanwhile, the magnesium sulfate heptahydrate is non-toxic and stable in property, can store different heat in different temperature stages, and is suitable for heat preservation coring of different reservoir depths.

The utility model discloses a geological drilling coring device which comprises a frame body, a placing table is installed on the upper portion of the frame body in a sliding mode, a motor is connected to the upper portion of the placing table through bolts, the motor is connected with a transmission shaft through a belt, a coring barrel is fixedly connected to the bottom of the transmission shaft, and a drill bit is fixedly connected to the bottom of the coring barrel. A cutting-off structure is arranged in the coring barrel and comprises a cavity and a first gear, a sliding block is slidably installed in the cavity, a rack is fixedly installed on the upper portion of the sliding block, a second gear is rotatably installed in the cavity, the second gear is connected with the rack in a meshed mode, and a double-face gear ring is rotatably installed at the upper position in the cavity. The double-face gear ring is connected with the second gear in a meshed mode, the double-face gear ring is connected with the first gear in a meshed mode, and a rotating shaft is fixedly installed at the top of the first gear. According to the geological drilling coring device disclosed by the utility model, a required core sample can be completely stored in the device.

The invention provides a tool applied to the field of petroleum drilling, and particularly relates to an electric control intelligent coring drill bit which comprises a power module and a cutting module, a limiting switch is arranged in the cutting module, the drill bit normally drills, a rock core passes through the interior of the drill bit and enters a coring barrel, and when the top of the rock core in the coring barrel triggers the limiting switch, the limiting switch is switched on. The MCU receives a coring completion signal, the electromagnetic valve is controlled to be opened through the MCU, high-pressure drilling fluid enters a turbine cavity through a mandrel hole, under the action of the high-pressure drilling fluid, the turbine rotates to generate motion and power, the motion and the power are transmitted to the rotating ring through the rotating disc and the rotating sleeve, the rotating ring rotates to push the connecting rod, the connecting rod pushes the evenly-distributed cutting knives, and therefore coring is completed. And the uniformly distributed cutting knives and the coring cylinder form a sealing cavity, the cut rock core is placed in the sealing cavity, and the cut rock core is taken out after pulling out of the drill. The intelligent degree of the drilling coring bit can be effectively improved, and the drilling coring efficiency and success rate are effectively improved.

The application discloses a sampling device for geological exploration, which comprises a geological sampling mechanism and a scale expansion mechanism. The geological sampling mechanism comprises a bottom plate, and a gas cylinder is fixedly connected to the top of the bottom plate. The application relates to the technical field of exploration sampling. The sampling device for geological exploration is combined with the geological sampling mechanism and the scale expansion mechanism. The two mechanisms are arranged so that when the sampling cylinder is lowered for sampling, the U-shaped supporting frame extends out of the side groove by the pressure of the core column. When the sampling cylinder drives the core column to rise, the U-shaped supporting frame supports the lifting supporting piece. The inclined pressing plate, the inner groove sliding frame and the tooth block are matched, so that the seal block can continuously and uniformly pass through the side groove and expand on both sides of the core column. Therefore, the scale line can be marked in advance when the core column is still in a whole in the sampling cylinder.

The invention relates to the technical field of ultra-deep geological exploration engineering, and discloses an ultra-deep horizontal hole full-hole coring and trajectory cooperative control system, which integrates a high-precision sensor and professional monitoring equipment through a geological data acquisition module to construct a multi-dimensional data monitoring system; the geological data transmission module adopts a dual backup scheme of drill rod built-in optical fiber and mud pulse transmission, is connected with the geological data acquisition module and the geological data analysis module through an industrial Ethernet, is carried with a 5G industrial module, and supports remote data access and instruction interaction of each functional module; the geological data analysis module comprises a processing unit and an analysis unit, the processing unit preprocesses the acquired data, and the analysis unit extracts the preprocessed data to calculate a trajectory deviation value and a rock core recovery rate; and the decision feedback module sends out feedback processing according to the calculation results of the trajectory deviation value and the core recovery rate. The system solves the problem of insufficient accuracy of traditional track evaluation.

The invention discloses a sampling device for geological exploration, the sampling device comprises a geological sampling mechanism and a scale rubbing mechanism, the geological sampling mechanism comprises a bottom plate, the top of the bottom plate is fixedly connected with an air cylinder, and the invention relates to the technical field of exploration sampling. According to the sampling device for geological exploration, the geological sampling mechanism and the scale rubbing mechanism are used in a combined mode, by means of the arrangement of the two mechanisms, when a sampling barrel descends for sampling, a U-shaped supporting frame can extend out of a side edge groove through the pressure of a rock core column, and when the sampling barrel drives the rock core column to ascend, the U-shaped supporting frame is used for bearing a lifting supporting piece, so that the sampling barrel is convenient to use, and the sampling efficiency is improved. Through cooperation of an inclined pressing plate, an inner groove sliding frame and a tooth block, a seal block can continuously and uniformly penetrate through a side edge groove to rub the two sides of the rock core column, and therefore scale marks are marked in advance when the rock core column is still in a whole in the sampling barrel.

The invention relates to the technical field of rock core sampling, in particular to a rock core sampling device for mineral geological exploration, which comprises a drilling machine body, a rock core extraction device is arranged on the drilling machine body, a plurality of sections of rotating pipes are arranged on the rock core extraction device, a drill bit is arranged at the bottom of the first section of rotating pipe, and a limiting assembly is arranged at the top of the drill bit. An inner pipe is arranged in the rotating pipe, a clamping head is fixedly arranged at the top of the inner pipe, a lifting hook device is detachably arranged at the top of the clamping head, a butt joint sleeve head is rotationally arranged at the bottom of the inner pipe, a plurality of cutting assemblies are circumferentially arranged in the butt joint sleeve head, a plurality of clamping assemblies are circumferentially arranged outside the butt joint sleeve head, and a plurality of centering assemblies are circumferentially arranged outside the inner pipe; a set of closed-loop efficient coring system is formed by integrating the three functional modules of automatic clamping removal, in-situ truncation and dynamic centering, the technical bottlenecks that a rock core is prone to being damaged and clamping removal is not smooth in a traditional device are overcome, and the automation degree of coring operation and the integrity of a sample are greatly improved.

The invention relates to the technical field of deep space detection equipment, in particular to an extraterrestrial celestial body rock coring drill and a coring and breaking method thereof. The coring drill comprises an attachment mechanism, a rotary impact sliding table mechanism and a coring and core breaking mechanism which are sequentially connected, the attachment mechanism is used for being anchored to the surface of celestial rock, and the rotary impact sliding table mechanism is used for providing drilling rotation, impact power and axial feeding motion; the coring and breaking mechanism comprises an outer drill bushing, an eccentric coring pipe assembly mounted in the outer drill bushing and a drill bit connected to the front end of the outer drill bushing; the eccentric coring pipe assembly comprises a coring pipe and a driving shaft for driving the coring pipe to rotate, and the coring pipe and the driving shaft are eccentrically arranged; the driving shaft can be controlled to synchronously rotate in the same direction with the outer drill bushing or independently rotate in the opposite direction relative to the static outer drill bushing. Active anchoring and multiple buffering are combined, the sample integrity, the operation success rate and the automation degree of extraterrestrial hard rock coring are remarkably improved, and lossless capture and mechanical reliable breaking of a rock core are achieved.

Provided is a core sample tray 10 comprising a tray body 12 defining a plurality of side-by-side rotund cross-sectional grooves 14 each for operatively receiving a core sample therein. The tray body 12 is bound by first and second pairs 16 and 18 of side walls. The first pair of side walls 16 is arranged substantially parallel with said grooves 14 and the second pair of side walls 18 is arranged substantially transverse against ends of said grooves 14. The core sample tray 10 generally defines saw blade slots 22 that are configured to allow a saw blade to pass therethrough in order to saw a plurality of core samples in-situ within the core sample tray 10.

The invention provides a pile foundation excavation method and equipment, and belongs to the technical field of foundation pit engineering, the pile foundation excavation equipment comprises an integrated multi-head drilling machine, the integrated multi-head drilling machine can be fixedly mounted at a center hole through a bottom expansion locking mechanism, a plurality of holes can be formed at a time when the integrated multi-head drilling machine works, and the integrated multi-head drilling machine resets and rotates by a certain angle after working once. The drilling work is repeated, then an annular groove is drilled after multiple times of work, a rock core in the annular groove is taken out through a coring tool, then the rock and the mountain in the central area can be separated and taken out through a coring barrel, and the slag removal work is completed; by means of the expansion locking mechanism arranged at the bottom of the drilling machine, the integrated multi-head drilling machine can be fixed to a center positioning hole, the situation that equipment deviates in the working process and influences the overall drilling effect is avoided, the multiple drilling machines are arranged together, drilling work of multiple holes can be conducted at the same time, automatic drilling is achieved, the working efficiency is higher, and the drilling efficiency is improved. Meanwhile, workers do not need to go down to operate, and safety and reliability are achieved.

This invention discloses a core retrieval or recovery tool for drilling, relating to the field of drilling engineering technology. The internal drill string assembly is suspended within the central channel of the external drill string assembly via a centralizer. The lower end of the internal assembly is a retaining spring assembly, and the lower end of the external assembly comprises the drill bit and multiple sliding blocks. One end of each sliding block extends into one end of the drill bit and is suspended by an elastic element. One end of the retaining spring assembly passes through the drill bit and extends between the sliding blocks, with the outer wall of the retaining spring assembly engaging with the inner wall of each sliding block via a bevel. Drilling fluid is introduced into the internal drill string assembly, causing it to move downwards relative to the external assembly. The downward movement of the retaining spring assembly pushes the sliding blocks outwards away from the drill bit's centerline. When the internal drill string assembly resets, the elastic element drives the sliding blocks back towards the drill bit's centerline. This invention improves drill string throughput and prevents the loss of incomplete or fragmented core samples at the drill bit, thereby increasing the core retrieval rate or core recovery rate.

The utility model relates to the technical field of sand gold ore exploration devices, and discloses a coring pipe angle adjusting mechanism for sand gold ore exploration, which comprises a base, a rotating frame, a swinging frame, a truss, a first cylinder body and a second cylinder body, the lower end of the rotating frame is hinged with the base, and the lower end of the first cylinder body is hinged with the base; a piston rod of the first cylinder is hinged to the upper end of the rotating frame, the middle of the swing frame is rotationally connected with the rotating frame, the lower end of the second cylinder is hinged to the rotating frame, a piston rod of the second cylinder is hinged to the swing frame, the truss is slidably connected with the swing frame, and an impact rotating power head is arranged on the truss. According to the utility model, accurate vertical drilling can be realized, the sampling authenticity is guaranteed, and the complex terrain adaptability and the operation efficiency are improved.

A water-jet ice core drilling rig includes a drilling barrel and a water-jet cutter head. Drilling barrel water channels are disposed on an inner barrel wall of the drilling barrel. The water-jet cutter head includes an inner pipe and an outer pipe. The inner pipe and the drilling barrel are coaxial. The inner pipe is fixedly connected to an end of the drilling barrel. First water passages are disposed on an outer side of an end of the inner pipe. The first water passages are uniformly distributed along a circumferential direction of the inner pipe. The first water passages are in one-to-one correspondence with the drilling barrel water channels. Each of the first water passages is connected with a corresponding one of the drilling barrel water channels. The outer pipe is sleeved outside the first water passages, the outer pipe is coaxially and fixedly connected to the inner pipe.

The utility model relates to the technical field of well wall coring devices, and discloses a well wall coring device convenient for drilling, which comprises a base column, a supporting assembly is arranged at the top of the base column, a coring assembly is arranged at the bottom of the base column, the coring assembly comprises a coring device body, a containing groove is formed in the side wall of the coring device body, and a coring hole is formed in the side wall of the coring device body. A plurality of positioning blocks are fixedly connected to the interior of the containing groove, a drill bit is slidably connected to the inner wall of the containing groove, a plurality of positioning grooves are formed in the drill bit, limiting balls are arranged on the two sides of the interior of each positioning block, limiting plates are fixedly connected to the side walls of the limiting balls, and limiting springs are arranged on the side edges of the limiting plates. In the utility model, the positioning groove at the bottom of a new drill bit is inserted after being aligned with the positioning block in the accommodating groove, and the limiting spring reversely pushes the limiting ball to reset after being in place, so that the limiting ball is clamped into the limiting hole in the side wall of the positioning groove to lock the drill bit, thereby achieving the effect of quickly replacing the drill bit, solving the problem that the drill bit of the traditional corer is complicated to replace, and improving the drilling operation efficiency.

The invention provides an underground automatic ball throwing tool, a well drilling coring device and an underground automatic ball throwing method.The underground automatic ball throwing tool comprises a shell provided with an inner cavity and an underground control unit fixedly arranged on the cavity wall of the inner cavity, and the underground control unit is provided with a detection component, a control component and a driving component; the detection component is used for receiving a push-down signal or a recovery signal sent from the ground, and the control component is connected to the detection component and used for controlling the driving component to drive the ball releasing unit to execute ball releasing when the detection component detects the push-down signal or controlling the driving component to drive the ball releasing unit to recover when the detection component detects the recovery signal; the ball releasing unit is provided with a ball containing channel and a push-pull rod connected with the driving component. Based on the electric control technology, the ball throwing operation is carried out by receiving the push-down signal sent from the ground, and the automatic ball throwing device can be suitable for automatic and efficient ball throwing in the environments such as inclined shafts and horizontal wells.

This invention relates to the field of permafrost coring technology, and particularly to a permafrost coring device, coring system, and coring method. The device includes: a support and fixing module, a coring module, a protective chamber, a monitoring module, a compensation module, and a control module. The coring module includes a coring ejector, a coring chamber, and a drill bit assembly. A door is provided at the bottom of the protective chamber. The monitoring module is used to detect the temperature and pressure of the coring chamber and the protective chamber. The compensation module is connected to an external compensator and is used to compensate for the temperature and pressure of the coring chamber and the protective chamber based on the detection results of the monitoring module. The control module is used to control the working status of the coring ejector, the drill bit assembly, the door, the monitoring module, and the compensation module according to instructions from a control terminal, so as to maintain the in-situ temperature and pressure of the coring chamber and the protective chamber during the process of moving to the target location in the permafrost, ejecting the coring sample, and completing the coring process.

The utility model discloses metal mine geology drilling equipment, which relates to the field of drilling equipment and comprises driving equipment, the driving equipment is mounted on a driving support through a moving frame, a platform is fixedly mounted on the driving support, a mounting part is fixedly mounted at the upper end of the platform, and the mounting part consists of a connecting ring and a mounting plate. The mounting plate is fixedly mounted on the outer wall of the connecting ring, a cleaning part is mounted on the platform, the cleaning part is composed of a mounting round pipe, a limiting insertion block, an anti-falling ring and bristles, the limiting insertion block is fixedly mounted on the outer wall of the mounting round pipe, and the mounting round pipe is fixedly sleeved with the anti-falling ring. The outer wall of the coring drill rod can be automatically cleaned, so that the cleaning burden of workers can be reduced, and the use efficiency of drilling equipment can be improved; and by arranging the mounting piece and the connecting piece, the cleaning piece can be conveniently disassembled and assembled, so that the cleaning piece can be conveniently replaced.

The application relates to the field of geological re-prospecting coring, in particular to a multi-tube-line site karst broken stratum multi-set-tube coring method and device, which comprises the following steps: determining a lofting drilling point position, fixing a hole punching and coring device; installing a first coring casing and a first drill bit on the hole punching and coring device, punching and coring a concrete layer and a soil layer located on a municipal road; installing a second coring casing and a second drill rod with a second drill bit on the hole punching and coring device, inserting a first metal wire into the second drill rod to the bottom of the second drill bit or clamping the first metal wire on the side of the second drill bit, punching a broken rock layer located below the soil layer until water gushing occurs and then coring; installing a third drill rod with a third drill bit on the hole punching and coring device, inserting a second metal wire into the third drill rod to the bottom of the third drill bit or clamping the second metal wire on the side of the third drill bit, and punching a fully strong weathered rock layer located below the broken rock layer. The application has the effect that coring can be completed in different strata.

The present disclosure relates to a coring assembly for extraterrestrial drilling and a preparation method of the coring assembly for extraterrestrial drilling. The coring assembly for extraterrestrial drilling includes: a limit locking mechanism, a flexible coring rotary body, a variable-diameter cone, an equal-tension bundled rope, and an end cap. One end of the flexible coring rotary body is connected to the limit locking mechanism, and the other end of the flexible coring rotary body is connected to one end of the variable-diameter cone. The flexible coring rotary body and the variable-diameter cone form a flexible coring structure. A storage structure is connected within the variable-diameter cone; and the other end of the variable-diameter cone is connected to the end cap via the equal-tension bundled rope.

This invention relates to the field of exploration and sampling technology, and discloses a self-anchoring lightweight drilling rig and a method for core drilling in soil and rock. The self-anchoring lightweight drilling rig includes: a reaction frame; a drilling unit including a drive unit, a drill rod, and a drill bit, the drive unit being mounted on the reaction frame; an anchoring unit including an expansion outer cylinder and an expansion inner cylinder, the expansion outer cylinder being connected to the reaction frame and inserted into a first borehole, the side wall of the expansion outer cylinder having multiple cuts, each cut having an anchoring plate connected to it, and each anchoring plate having a protrusion on its inner side wall; the reaction frame being connected to the expansion outer cylinder; the drive unit presses the expansion inner cylinder into the expansion outer cylinder, causing the protrusions to push the anchoring plates outward and tightly fit them against the borehole wall of the first borehole, thereby achieving firm self-anchoring; the drive unit being mounted on the reaction frame allows the reaction force generated during drilling to be directly transmitted to the anchoring unit and the surrounding strata through the reaction frame.

The application relates to the technical field of pressure-maintaining coring, and provides a pressure-maintaining coring plate valve radial sealing control system, which comprises a pipe structure, a plate valve impact mechanism, a plate valve mechanism and a core inner pipe assembly. The plate valve impact mechanism is sleeved in the pipe structure and located above the plate valve mechanism and is elastically suspendedly connected with the pipe structure. The plate valve mechanism is connected with the pipe structure. The core inner pipe assembly is sleeved in the plate valve mechanism, the plate valve impact mechanism and the pipe structure and is elastically suspendedly connected with the plate valve impact mechanism. The pressure-maintaining coring plate valve sealing system provided by the application solves the sealing problem of the pressure-maintaining coring plate valve in a particle-containing mud environment through radial extrusion sealing.

The invention relates to the technical field of geological exploration and directional drilling, and discloses a directional drilling system integrating three-dimensional trajectory control and rope continuous coring. The system is composed of a geology and site data acquisition module, a three-dimensional drilling scheme design module, a construction early-stage preparation module, a horizontal directional guide drilling module, a technical casing installation module, a coring operation module, a drilling comprehensive test module and a result acceptance and closed loop module. A complete modular working process including data acquisition, scheme design, construction execution and test acceptance is constructed, and an optimizable technical system is formed from early-stage multi-source data driving design, precise execution and real-time monitoring of all links in construction and comprehensive test and result integration after hole finishing. According to the system, the success rate and the data quality of single exploration can be greatly improved, the system performance can be continuously optimized through experience feedback, and a reliable solution is provided for implementing accurate geological exploration in various limited and complex sites.

A device and method for making a hole in a golf green. The device has longitudinal, radial, and angular directions and includes a cutting cylinder, a structure, a weight, and a weight-propulsion device. The cutting cylinder has an axis parallel to the longitudinal direction and an open end freely movable longitudinally. The structure includes a guide defining a weight path with first and second endpoints. The weight engages the guide and moves along this path. The propulsion device drives the weight reciprocally between the endpoints so the weight strikes the cutting cylinder, urging it longitudinally. The propulsion device includes a first electric motor, a spring, and a force-mediating device. The motor rotates a drive axle. During a first stage, the force-mediating device engages the axle with the spring to store potential energy. In a second stage, it disengages the axle, allowing the spring to release the energy to accelerate the weight toward the cutting cylinder.

The present application provides a kind of asphalt concrete surface layer core drilling machine anti-pollution device, including base, sleeve, water storage part and water absorption layer, the middle part of base has annular through hole;Sleeve is connected on base and extends along the vertical direction of base, is configured with multiple transmission grooves along the extension direction of sleeve inner wall, transmission device suitable for transmitting sewage along the vertical direction is arranged in each transmission groove;Water storage part is connected in the outer wall of sleeve, and water storage part is communicated with transmission groove;Water absorption layer is connected in the bottom of base, is suitable for being adsorbed by the water absorption material in water absorption layer;The anti-pollution device of the present application can actively transmit sewage, improve the efficiency and timeliness of sewage treatment, avoid the expansion of pollution surface and the deepening of pollution depth caused by sewage deposition, and the sewage is directly transmitted into water storage part, avoid the problem of efficiency reduction caused by long-distance transmission of sewage, also make the construction of the whole device more simple, more suitable.

The utility model relates to a vertical hole grinding drill for replacing large-aperture coring in an obstacle breaking area of an underground diaphragm wall, and solves the problems that the underground diaphragm wall is of a high-strength reinforced concrete structure, the drilling diameter is large, the drilling depth is large, and a traditional coring drill bit is insufficient in transmission torque in the process of drilling a construction hole in the underground diaphragm wall. The device comprises a drill bit, a drill rod is connected to the upper portion of the drill bit, the drill bit comprises a connecting section, a sleeve section and a grinding section from top to bottom, a grinding disc is arranged at the bottom of the grinding section, annular teeth are arranged on the circumference of the bottom face of the grinding disc, a plurality of grinding heads are distributed in the middle of the bottom face of the grinding disc, and water injection holes are formed in the positions, at gaps of the grinding heads, of the bottom face of the grinding disc. And an overflow slurry discharging channel is formed between the outer wall of the drill bit and the drill hole. The grinding head is arranged on the grinding disc on the bottom surface of the drill bit and is matched with an annular tooth structure of an original coring sleeve to grind the bottom surface of a drill hole and slowly push the drill hole, so that the drilling construction requirements of large-depth and high-strength materials are met.

The invention relates to the technical field of drilling equipment, and discloses a cluster hollow coring device based on a small-diameter motor, the cluster hollow coring device comprises a drill bit, a plurality of screw motors, a slurry pump, a plurality of cardan shafts, a reversing assembly and a transmission shaft, the plurality of screw motors are distributed around the axis of the drill bit at intervals; the slurry pump is communicated with all the screw motors and is used for conveying drilling fluid to all the screw motors; each universal shaft is connected with an output shaft of the corresponding screw motor; the reversing assembly is connected with all the universal shafts; the transmission shaft is connected with the drill and the reversing assembly. The reversing assembly is used for converting output power of the multiple screw motors into input power of the transmission shaft. A single large-diameter screw motor is replaced by a plurality of small-diameter screw motors, and the rotor core shift distance of the small-diameter screw motor is smaller, so that the core shift vibration generated during working is reduced, the wear degree of the rotor can be effectively reduced, the failure of a pressure chamber of the motor is avoided, and the service life is prolonged.

The invention discloses a sampling device for engineering geological survey, and relates to the technical field of geological prospecting, the sampling device comprises a rack, the rack is provided with a coring drilling tool and a first driving member, the inner part of the coring drilling tool is detachably connected with an inner cylinder, the inner cylinder is internally provided with a transmission ring, the transmission ring is internally provided with a bracket, and the bracket is internally provided with a second driving member; a plurality of driven wheels are rotationally connected to the support, the first driving part is in transmission connection with the driving wheels, the support is used for limiting the shape and the position of the transmission ring through the driven wheels, the driving wheels are arranged on the outer circumferential wall of the transmission ring, and the driving wheels are used for driving the transmission ring to turn over. A second driving part is further arranged in the inner cylinder and used for driving the driving wheel to rotate, the transmission wheel is used for clamping a rock core, and a storage assembly is further arranged above the transmission ring and used for storing the rock core and reducing collision damage, caused by rock core deviation, of the rock core and the inner pipe.