155 results about "Coring" patented technology

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 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.

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 present application belongs to the technical field of drilling coring device in the technology of oil geological exploration and well drilling, and discloses a borehole wall coring drilling tool suitable for high permeability formation of open hole, which comprises a drill bit, a plurality of chip removal holes are arranged on the side wall of the drill bit at intervals; a drill rod, one end of the drill rod is connected with the drill bit, and a plurality of spiral hollowed-out mud guide grooves are arranged on the rod wall of the drill rod at intervals and close to the drill bit. The spiral hollowed-out mud guide grooves are arranged on the rod wall of the drill rod at intervals and close to the drill bit, so that the scraping function is added to the inner and outer walls of the drill rod, the mud cake on the borehole wall can be shredded, the closed space is destroyed, the mud cake is thrown out of the drill bit by using the rotation characteristics of the drill bit, the mud slurry washes the rock debris and the drill bit, and finally the rock debris is discharged from the chip removal hole, the drilling of the rock core is reduced in resistance, the probability of drill pipe sticking is reduced, and the success rate of coring is improved.

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 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 application provides a ball and socket type rope coring drill tool suitable for an audio frequency drilling machine, which comprises an outer pipe assembly for downward drilling and an inner pipe assembly for sampling, the inner pipe is arranged in the hollow inner cavity of the outer pipe, and the top of the inner pipe is provided with a ball and socket mechanism and a fishing spear, the ball and socket mechanism is used for realizing the clamping or separation between the inner pipe assembly and the outer pipe assembly when the inner pipe assembly is moved into position relative to the outer pipe assembly. The whole drill tool has simple structure, high outer pipe thread strength, can achieve waterless drilling, the ball and socket mechanism has accurate positioning, reliable locking and easy unlocking, and the drill tool can improve the comprehensive drilling efficiency and greatly reduce the labor intensity.

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.

The present application provides a kind of inner slag discharging device and its slag discharging method, it includes high wear-resistant obturator, drill bit drill rod device, venturi water and drill slag dry-wet separator, the drill bit drill rod device is located in high wear-resistant obturator, drill slag dry-wet separator is connected with drill bit drill rod device by venturi water.The flow direction of drill slag can be changed by changing the running direction of slag discharging medium, so as to reduce the scouring, soaking and friction of slag discharging medium and drill slag on the hole wall, which is beneficial to the formation of drilling hole;It can achieve the purpose of point coring by achieving "falling and discharging simultaneously";Drilling cuttings can be well collected, which is beneficial to the civilized production of construction site and prevents dirtiness and disorder;If inert gas is used for slag discharging during construction, it can also achieve the purpose of inhibiting spontaneous combustion of coal seam.Through the above technical scheme analysis, the device is theoretically feasible and the operation is reliable, which provides good drilling quality for casing, greatly improves the success rate of drilling and casing and the extraction effect.

The invention belongs to the technical field of drilling and coring of road surface coring machines, and discloses an anti-pollution device of a road surface coring machine, the anti-pollution device comprises a splash-proof cylinder and a waste water collector, the splash-proof cylinder and the waste water collector are communicated through a drain pipe; a base is arranged at the bottom of the splash-proof barrel, a movable guide rail is arranged in the center of the middle of the splash-proof barrel, and the coring machine is arranged in the movable guide rail in a sliding mode. The coring machine can slide up and down along the moving track, when the coring machine slides downwards, a coring drill of the coring machine drills and cores on the road surface, cooling lubricating water used in the drilling process and chippings generated by drilling are thrown out by the rotating coring drill, and the chippings enter the waste water collector through the drainage pipe after being collected by the inner wall of the splash-proof barrel. The device has the beneficial effects that the working condition of splashing of waste water and chippings is effectively improved, the subsequent manual cleaning link is reduced, and the working procedure and cost are saved.

The application discloses a polar drilling hole wall directional coring drill, which comprises a shell, an upper hot melting drill bit, a reverse torsion mechanism, a cable chamber, a control system, a hole positioning mechanism, a supporting mechanism, a reaming mechanism and a coring mechanism, wherein the upper hot melting drill bit is assembled at the top of the shell, the reverse torsion mechanism, the cable chamber, the control system, the hole positioning mechanism, the supporting mechanism, the reaming mechanism and the coring mechanism are sequentially assembled in the shell from top to bottom, and the control system is connected with the upper hot melting drill bit, the reverse torsion mechanism, the hole positioning mechanism, the supporting mechanism, the reaming mechanism and the coring mechanism respectively. The application has the advantages that the coring direction can be accurately controlled, the demand of polar scientific research can be met, the drill is provided with the reaming mechanism, the auxiliary time is greatly shortened, the ice core tube can be telescoped to store the ice core in real time, the loss of the ice core is avoided, the drill adopts the modular design, the structure is simple and compact, the burden of polar logistics guarantee is reduced, and the drill is suitable for coring drilling in a harsh environment.

The invention relates to a light-weight pressure-maintaining gas-maintaining coring device for a deep coal mine and a using method, the coring device comprises an outer pipe, a center rod, a core barrel, a pressure-maintaining controller, a clamp spring and a core falling prevention device, the lower end of the outer pipe is connected with a coring drill bit, the lower end of the center rod is connected with the core barrel, and the core falling prevention device and the clamp spring are installed at the lower end of the core barrel; the core falling prevention device is positioned below the clamp spring and above the coring drill bit; the core falling prevention device comprises a plurality of discs arranged in the circumferential direction and an elastic piece used for driving the multiple discs to be folded and closed towards the middle. The core falling prevention device is added, so that the equipment has a core falling prevention function, and when the rock core is broken by the snap spring, the core falling prevention device can effectively prevent a coal sample from falling out of the rock core barrel, and the heart taking rate is increased.

The invention discloses a drilling coring rock core ground processing device and method, and belongs to the technical field of oil and gas drilling, the device comprises a cutting table for cutting an inner cylinder, and is characterized by further comprising a main rack, an auxiliary rack and a hydraulic lifter; the main rack is provided with a slideway, a sliding roller used for supporting an inner cylinder to slide and a righting roller used for righting the inner cylinder, the hydraulic lifters are uniformly arranged on the main rack, the hydraulic lifters are located below the sliding roller, the sliding roller is in sliding connection with the slideway, a supporting frame is in sliding connection with a table top of the main rack, and the supporting frame is in sliding connection with the inner cylinder. A gamma scanner or a cutting machine is arranged on the supporting frame, and the auxiliary rack is connected with the cutting table. Through cooperation of the hydraulic lifters and the sliding rollers, stable lifting and accurate positioning of the core inner cylinder are achieved, the operation stability and safety are effectively improved, then the inner cylinder is cut through the cutting machine, and the coring reliability and stability can be effectively guaranteed.

The utility model discloses a sand coring engineering driller which comprises a coring driller which comprises a mast assembly and a mast base. The stabilizing assembly comprises a first fixing plate, a first hydraulic push rod, a second fixing plate, a second hydraulic push rod, a movable plate, a fourth through hole, a supporting column, a supporting disc and a spring, the first fixing plate is fixed to the side edge of the mast base, the first hydraulic push rod is fixed to the first fixing plate, and the second fixing plate is fixed to the movable end of the first hydraulic push rod. The second hydraulic push rod is fixed to the second fixed plate. The movable plate is fixed to the movable end of the second hydraulic push rod. The utility model solves the problems that the working place of the sand field coring drilling machine is on the beach sand field, the beach sea surface has the characteristics of soft stratum, high water content and the like, and silt at the bottom of a drill hole upwells along with water along with the deepening of the drilling depth, so that the contact part of the mast base and the sand field is loosened, and the mast is unstable.

The application discloses a soft soil bearing capacity testing device, which comprises a main body, the main body comprises a hydraulic driving lifting seat, a driving mechanism is arranged on the lifting seat, a coring drill rod is arranged in the main body, a first positioning groove is arranged in the coring drill rod, a bottom-opened piston barrel is arranged at the top of the coring barrel, a piston is slidably arranged in the piston barrel, the piston is connected with a piston rod, the piston rod penetrates through the top of the piston barrel and is connected with a first positioning mechanism, an overflow valve is arranged on the piston barrel, an extension pipe is arranged on the side of the piston barrel, a detection pipe is movably sleeved on the extension pipe, the end of the detection pipe is sealed by an elastic layer, a displacement sensor and a pressure sensor are fixed in the detection pipe by a support, the detection end of the displacement sensor is connected with the elastic layer, an air / gas inlet pipe is arranged above the detection pipe and communicates with the piston barrel, a one-way valve is arranged on the air / gas inlet pipe, and a first through hole is arranged on the side of the coring drill rod.

This invention relates to the field of core drilling technology in the oil and gas industry, and discloses a continuous coring apparatus. The continuous coring apparatus includes an outer cylinder with connectors and a coring drill bit connected to its upper and lower ends, respectively. The outer cylinder contains a linear motion mechanism and multiple nested inner coring cylinders. The lower end of the outermost inner coring cylinder extends into the coring drill bit. Between adjacent inner coring cylinders, the linear motion mechanism drives the inner inner coring cylinder to move axially along the outer inner coring cylinder. This invention enables continuous coring with a single-cylinder coring operation footage of 20-30 meters or more, improving efficiency by at least 2-3 times compared to existing processes, significantly saving drilling costs and increasing coring efficiency.

The invention discloses an in-situ coal seam pressure and heat preservation coring device which comprises an outer pipe assembly and an inner pipe assembly, and the inner pipe assembly is arranged in the outer pipe assembly in a sleeved mode. A gas collecting hole is formed in the top side wall of the outer pipe assembly, a sealing valve is arranged in a bottom inner cavity of the outer pipe assembly, and the bottom end of the spring is higher than the sealing valve; the inner pipe assembly comprises a spearhead, a connecting rod, a power supply assembly, a control assembly, a conductive trigger assembly and a core barrel which are sequentially arranged from top to bottom, an active heat preservation layer is arranged on the outer wall of the core barrel and electrically connected with the conductive trigger assembly, and a sensor is arranged on the bottom face of the conductive trigger assembly; the periphery of the bottom of the core barrel is sleeved with the differential tube, a clamp spring cover is arranged on the outer wall of the bottom end of the core barrel, a clamp is arranged at the bottom of the differential tube and matched with the clamp spring cover, and a spring is arranged between the differential tube and the outer tube assembly. According to the invention, the fidelity effect of a sample and the adaptability of equipment in the coring process are remarkably improved by integrating active heat preservation and passive heat preservation technologies and combining a plurality of innovative technologies such as shock resistance, corrosion resistance and rapid gas measurement.

The utility model discloses a kind of multi-slot coring bits, belong to coring bit technical field, including drill pipe, the bottom end of the drill pipe is provided with sleeve pipe, the outside of the sleeve pipe is sleeved with drill bit body, the side of the drill bit body is provided with multiple cutting edges, arc-shaped overflow passage is arranged between every two adjacent cutting edges, the outside of the cutting edge is fixedly connected with side cutting tooth, the bottom surface of the drill bit body is fixedly connected with multiple lower cutting teeth, the inside of the cutting edge is provided with lower sleeve groove, the sleeve pipe movably sleeve joint to the inner chamber of lower sleeve groove.In the utility model, when drill pipe drives drill bit body to rotate and drills and takes core to stratum, cutting edge, side cutting tooth and lower cutting tooth are used to drill stratum, rock material produced by drilling moves upward along arc-shaped overflow passage, and water discharged by cooperating inner water eye and outer water eye, ensure that rock material can be smoothly moved from the side of drill pipe, and it is good in practicality.

The pressurizing mechanism comprises a pressurizing inner cylinder, a pressurizing outer cylinder with the upper end arranged outside the pressurizing inner cylinder in a sleeving mode, a steel ball used for axially locking the pressurizing outer cylinder and the pressurizing inner cylinder and an unlocking mechanism used for unlocking axial locking, and the steel ball can be installed in the cylinder wall of the pressurizing inner cylinder and the cylinder wall of the pressurizing outer cylinder at the same time to achieve axial locking; the unlocking mechanism comprises an unlocking sleeve installed in the pressurizing inner cylinder, unlocking is achieved by enabling the unlocking sleeve to slide downwards relative to the pressurizing inner cylinder, and when the unlocking sleeve is located at an unlocking position, the steel ball retreats from the cylinder wall of the pressurizing outer cylinder and is installed in the unlocking sleeve and the cylinder wall of the pressurizing inner cylinder at the same time, so that axial locking is relieved; when the axial locking is released, the pressurizing outer barrel can move downwards from the first position to the second position relative to the pressurizing inner barrel. Unlocking is achieved through sliding of the unlocking sleeve, and fixing is safer than pure pin fixing; according to the pressurizing mechanism, the two-way movement action that the core catcher is pressed downwards for core cutting and the core cabin is pulled upwards for pressure maintaining can be achieved.

The invention discloses a pressure-maintaining coring method for a fragile coal seam, and relates to the technical field of pressure-maintaining coring, and the pressure-maintaining coring method comprises the following steps: S1, assembling a coring drill bit, and lowering the coring drill bit to a position L1 above a coring target layer; s2, a coring drill bit is lowered to the position L2, L1gt, above a coring target layer; l2, observing the hanging load change, judging the shaft bottom condition and cleaning the shaft bottom; s3, short-distance tripping is conducted, and the stability of the well wall is judged; s4, coring drilling is conducted according to preset drilling parameters, process parameters are recorded in the process, and drilling parameters are adjusted according to the process parameters; and S5, after coring is completed, core cutting is conducted, and the sample is pulled out to be recycled. The method achieves the purpose of avoiding low coring efficiency and poor sample quality caused by sand setting and chipping interference in the fragile coal seam in the coring process.

The invention discloses a peristaltic blue ice mechanical coring drilling tool which comprises a cable terminal, an anti-twisting system, a drilling system, a coring system and a control system, and the cable terminal, the anti-twisting system, the drilling system and the coring system are sequentially connected from top to bottom. An armored cable arranged in the cable terminal provides power for the anti-twisting system, the drilling system and the coring system, and the control system is assembled on the ground surface and controls work of the anti-twisting system, the drilling system and the coring system through the armored cable. The anti-twisting device has the beneficial effect of better anti-twisting effect. Faults caused by the tensile problem of the armored cable are avoided, the overall reliability of the drilling tool is effectively improved, and the service life of the drilling tool is effectively prolonged. In the aspect of solving the problem that the drilling tool is stuck, the resistance wire is arranged in the spiral strip, when the drilling tool is stuck, the control system controls the resistance wire to be powered on and heat to conduct hot melting, surrounding ice chips are melted, and therefore recovery of the drilling tool is achieved, and compared with a traditional drilling tool, the drilling tool is safer.

The invention discloses a deep hole closed coring device and method, and relates to the technical field of deep hole closed coring, the device comprises an outer pipe, a first inner pipe and a second inner pipe arranged in the outer pipe, and an inner drill bit inserted in the second inner pipe; a blocking mechanism for blocking a coal core is arranged between the first inner pipe and the second inner pipe, a limiting mechanism for limiting the movement of the inner drill bit is arranged on the second inner pipe, and an analysis device for sampling is arranged at the tail part of the first inner pipe; through hydraulic driving, the second piston and the first piston are sequentially pushed to move, the pin is controlled to retreat from the limiting hole so as to relieve locking of the inner drill bit, the ball core is driven to rotate so as to block a coal core channel, and automatic control over the whole process of drilling, sampling and sealing is achieved; the device has the beneficial effects that the device has the advantages of being compact in structure, reliable in sealing, simple and convenient to operate and capable of continuously sampling, and is suitable for accurate sampling and analysis of deep-hole coal bed gas.

The invention discloses an intelligent drilling and coring tool, belongs to the technical field of oil and gas drilling engineering, and aims to solve the problems of low efficiency, high cost and poor function switching reliability caused by the fact that a tool needs to be replaced by tripping for many times during operation of the same well section. An underground pressure signal is triggered by throwing a plugging ball, an intelligent control module automatically controls a motor to drive a cutting composite tooth piece to be opened and closed so as to achieve function switching, when the tooth piece is closed, drilling teeth on the tooth piece cooperate with a drill bit to achieve comprehensive drilling, and after the tooth piece is opened and withdrawn in the radial direction, the drill bit independently conducts annular cutting. According to the intelligent drilling and coring device, through the integrated design and intelligent electric control switching, the tripping process is omitted, the operation efficiency and the rock core harvesting reliability are remarkably improved, and automation and intelligentization of drilling and coring operation are achieved.

The invention relates to the technical field of coal mine drilling, and discloses a coal rock drilling and sampling integrated sealed sampling drilling tool capable of freely shrinking a drill bit, which comprises an inner-layer drill bit, an outer-layer drill bit, a drill rod, a sleeve, a hydraulic shrinking device and a coring pipe which are tightly connected through a helical tooth-feather key composite device, during drilling, the inner-layer drill bit and the outer-layer drill bit drill forwards together, when a specified distance is reached, the inner-layer drill bit shrinks backwards by utilizing a hydraulic shrinkage system, after the inner-layer drill bit retreats to a specified position, the outer-layer drill bit continues to drill, and a sample enters a coring pipe reserved after shrinkage. According to the device, efficient coring of a coal seam is achieved through collaborative operation of the inner-layer drill bit and the outer-layer drill bit and an intelligent shrinkage control mechanism, the inner-layer drill bit and the outer-layer drill bit are tightly nested through a helical tooth-feather key composite guide mechanism, radial displacement is limited and the inner-layer drill bit is allowed to slide in the axial direction through the meshing design of a helical tooth ring and a feather key groove, and during drilling, the inner-layer drill bit and the outer-layer drill bit synchronously rotate; the hard alloy cutting teeth crush the coal seam, and coal slag is discharged through the spiral slag discharging groove.

This invention discloses a downhole self-dropped ball coring device, tool string, and related methods. The self-dropped ball coring device includes: a self-dropping mechanism and a coring tool; the self-dropping mechanism is located at the upper end of the coring tool and is fixedly connected to it; the self-dropping mechanism includes a sleeve assembly and a steel ball chuck; the sleeve assembly includes an inner cylinder section and an outer cylinder section sleeved around the inner cylinder section; the steel ball chuck is located inside the outer cylinder section and below the inner cylinder section; the steel ball chuck is used to hold steel balls; the inner cylinder section, after the coring device is lowered to a preset position, is pushed downwards relative to the outer cylinder section by the drill string connected to the inner cylinder section, enters the steel ball chuck, opens the steel ball chuck, and drops the steel balls. This invention solves the problem of not being able to drop balls from the wellhead in deep and ultra-deep well coring operations due to the presence of check valves, by using a self-dropping function to avoid drilling fluid directly scouring the core and affecting the coring quality.

The utility model discloses a coring tool with a rotary shunting assembly, which belongs to a drilling tool in the technical field of petroleum drilling equipment, and adopts the technical scheme that an upper joint is used for being connected with an external rotary power component and conveying drilling fluid; one end of the outer cylinder is fixedly connected with the upper connector, and a coring drill bit is arranged at the other end of the outer cylinder. An inner cylinder is rotatably connected to the interior of the upper connector through a bearing assembly, an annular flow channel is formed between the outer cylinder and the inner cylinder, one end of the annular flow channel is communicated with an inclined hole formed in the inner cylinder, the other end of the annular flow channel is communicated with a liquid drainage hole formed in the end of the coring drill bit, and a plugging ball for plugging a central pipe hole is arranged in the rotary flow dividing assembly; the utility model provides a coring tool with a lubricating, rotating and shunting assembly, which not only can enable an outer cylinder and an inner cylinder to rotate relatively for a long time, but also can enable drilling fluid to be shunted to an annular space between the inner cylinder and the outer cylinder from a plugging central pipe hole of the coring tool, so that a rock core is prevented from being eroded by the drilling fluid.

This invention belongs to the field of coring tool technology, specifically, it relates to a coring drill bit. The coring drill bit includes: a body with a coring channel coaxially disposed within the body; circumferentially spaced cutting wings disposed on the body; circumferentially spaced straightening blocks disposed on the outer surface of the body, the straightening blocks being connected to the cutting wings; and circumferentially spaced flow channels disposed on the body, the flow channels being located between adjacent cutting wings; each cutting wing includes a tooth-spreading surface and a front surface, a leading edge being formed between the tooth-spreading surface and the front surface by a chamfer, and a plurality of cutting teeth being disposed on the leading edge, the cutting teeth not all being of the same size, at least one of the cutting teeth having a size greater than 13 mm.

The invention discloses a coring drilling tool, and relates to the technical field of deep large-diameter hard rock coring drilling, the coring drilling tool comprises a single action mechanism, an outer pipe assembly and an inner pipe assembly, the inner pipe assembly is arranged in the outer pipe assembly, the outer pipe assembly comprises an outer cylinder, the thickness of the two ends of the outer cylinder is larger than the thickness of the middle part, and the outer diameter of the two ends of the outer cylinder is larger than the outer diameter of the middle part; the single-acting mechanism comprises a single-acting connector, a hanging shaft and a baffle ring, the single-acting connector is fixedly connected with the outer pipe assembly, the baffle ring is fixedly arranged in the single-acting connector, the hanging shaft comprises a large shaft end and a small shaft end, the small shaft end can penetrate through the baffle ring and is fixedly connected with the inner pipe assembly, and the large shaft end is fixedly connected with the inner pipe assembly. The face, close to the small shaft end, of the large shaft end can abut against the face, away from the inner pipe assembly, of the baffle ring, and the suspension shaft and the single-acting connector can form circumferential rotation connection. According to the invention, the mechanical drilling speed is higher, and the higher trafficability of the outer cylinder can be ensured.

The environmentally friendly coring drill bit drilling device according to the present application comprises a base member fixed to a structure to be drilled, a bracket vertically coupled to the base member and formed with a rack on one side thereof, a lifting carriage having a pinion gear engaged with the rack and installed on the bracket so as to be able to move up and down, a fixed plate coupled to one side of the lifting carriage and rotatably supporting a driving shaft of a motor, a driven shaft rotatably installed on the fixed plate and rotated by the driving shaft of the motor, a coring drill bit coupled to the driven shaft, and a metal rod passing through the driven shaft and the coring drill bit and coupled to an object to be cut.

Systems and apparatuses are provided for clot extraction. In a first aspect, a system includes a first shaft, a second shaft, a third shaft, a coring element including a blade, and a mesh. The coring element has a first end and a second end. The first end of the coring element is coupled to the first shaft and the second end of the coring element is coupled to the second shaft. The mesh includes an open end and a second end. The open end of the mesh is coupled to a proximal portion of the coring element and the second end of the mesh is coupled to the third shaft through a tip structure. Other aspects and features are also claimed and described.