1719results about "Earth drilling tools" patented technology

The invention relates to a drill rod buckle cleaning device and a buckle cleaning method. The drill rod buckle cleaning device comprises a brush head mechanism, an adjusting mechanism and a revolution driving mechanism. The adjusting mechanism is connected with the brush head mechanism and the revolution driving mechanism. The rotating axis of the adjusting mechanism is a revolution axis, and the adjusting mechanism is used for adjusting the axis of the brush head mechanism and the offset of the revolution axis so that the head end of the brush head mechanism can be attached to the threaded face of the male buckle or the female buckle of the drill rod which is coaxially arranged with the revolution axis. The revolution driving mechanism is used for driving the adjusting mechanism and the brush head mechanism with the head end attached to the threaded face of the male buckle or the female buckle of the drill rod to synchronously rotate around the revolution axis, and the brush head mechanism synchronously rotates when rotating around the revolution axis. Based on the arrangement, male buckles and female buckles of drill rods with different diameters can be automatically cleaned, so that the labor intensity is reduced, the buckle cleaning efficiency and quality are improved, the male buckles and the female buckles can be cleaned only by arranging one brush head mechanism, one adjusting mechanism and one revolution driving mechanism, the overall structure is simple, and the size is small.

The invention relates to the technical field of engineering machinery, in particular to a low-speed large-torque energy-saving tunneling rotary table which comprises a drilling barrel, a plurality of protruding blocks are fixedly connected to the inner wall of the drilling barrel, a containing groove extending into the protruding blocks is formed in the outer side of the drilling barrel, the bottom of the containing groove is open, and a drill bit assembly with the adjustable angle is installed in the containing groove; the drill bit assembly comprises a sliding plate slidably connected with the inner wall of the storage groove, an extension block with one end movably extending to the outside of the protruding block is arranged at the bottom of the sliding plate, cutting teeth are fixedly connected to the bottom of the extension block, and a limiting assembly used for limiting the sliding plate is installed in the storage groove. The limiting assembly comprises a plurality of threaded rods fixedly connected with the bottom of the inner side of the containing groove, the threaded rods are sleeved with arc-shaped plates, and the two ends of each arc-shaped plate are provided with round holes corresponding to the threaded rods. The technical problems that according to an existing tunneling drilling disc, it is difficult to adjust the angle of a drill bit to better crush a hard rock stratum, and the replacement frequency and difficulty of the drill bit are reduced are solved.

The utility model discloses a hydraulic rock drill which comprises a machine body composed of a machine base, a cylinder body, a middle body, a gear box, a gear box cover and a machine head which are sequentially connected, a first cavity for containing an impact piston and a second cavity for containing a bit shank are formed in the machine body, and a cooling lubricating cavity communicated with the first cavity and the second cavity is formed in the machine body. An air inlet chamber is formed in the machine base, and an air inlet communicated with the air inlet chamber is formed in the rear end of the machine base. The impact piston is provided with a central channel which is communicated with the air inlet chamber and the cooling and lubricating air chamber; an air passing channel which is communicated with a gap between the bit shank, the rotary assembly and the machine head and a gap between the bit shank and the machine head part is formed in the machine head; cooling and lubricating air introduced into the air inlet chamber enters the cooling and lubricating cavity through the center channel of the impact piston, sequentially passes through the bit shank, the gap between the rotary assembly and the machine head and the air passing channel, enters the gap between the head of the bit shank and the machine head and is blown out, and the situation that the cooling effect is poor due to the fact that air flow is poor after heat exchange is avoided.

The invention provides a reverse-circulation large-diameter binding type down-hole hammer reamer bit and a slag discharging method. The reverse-circulation large-diameter binding type down-hole hammer reamer bit specifically comprises a drill bit shroud, an air distribution chamber, a central pipe combination, a down-hole sub hammer and a slag suction opening, wherein the slag suction opening is formed in the bottom of a central pipe and used for sucking crushed rock slag into a drill rod through negative pressure so as to discharge the rock slag. For bedrock large-diameter water-containing stratum reaming drilling, the unique slag suction opening is formed in the bottom of the center pipe, tail gas of the down-the-hole hammer forms entrainment airflow to push liquid in a drill hole to return to the ground surface from the slag suction opening, and the stable continuous reverse circulation slag discharging effect is achieved by means of gas lift water level rising of tail gas pressure of the down-the-hole hammer; and the drilling efficiency of the large-diameter binding type down-the-hole hammer is improved, and the stable and continuous deslagging effect is extremely good in construction application.

The invention discloses an overload protection drill bit tool with an automatic mud drum cleaning function. The overload protection drill bit tool comprises a connector pipeline, a fluid pipeline, a bearing component, a sealing device, a cleaning pressure relief device, a pressure relief pipeline and a drill bit connector. A fluid pipeline is arranged at the bottom of the connector pipeline, the pressure relief pipeline is arranged at the bottom of the fluid pipeline, and the drill bit connector is arranged at the bottom of the pressure relief pipeline. One of the two bearing parts is arranged at the bottom of the fluid pipeline, and the other bearing part is mounted at the upper end of the drill bit connector; the number of the sealing devices is two, and the two sealing devices are arranged on the opposite sides of the two bearing components. The cleaning pressure relief device is arranged between the two sealing devices, and the two bearing components are symmetrically arranged relative to the cleaning pressure relief device. The cleaning pressure relief device can be automatically opened and closed after the drill bit is blocked by a balling drum, the drill bit balling drum is cleaned, automatic rotation can be achieved, and it is guaranteed that cleaning is comprehensive and thorough.

The invention belongs to the technical field of rock drills, and discloses a rotary impact type hydraulic rock drill. The rock drilling bit group is arranged in one side of the rock drilling machine shell; the rotating mechanism is arranged at the top of the rock drill shell, and the rotating mechanism is located above one side of the rock drill bit set; according to the technical scheme, by arranging the hydraulic mechanism, the cooling and cleaning assembly and the driving assembly, when the hydraulic mechanism is started to make the output end collide with one end of the middle of the rock drilling bit set back and forth, the top of one side of the driving assembly is driven to move up and down back and forth; cold water in one side of the cooling and cleaning assembly can be pumped back and forth into the other side of the cooling and cleaning assembly, and then the cold water can be sprayed out through the other side, so that heat generated by the impact part of the hydraulic mechanism and the rock drilling bit group can be cleaned and cooled; the service life of parts in the rock drill shell is prevented from being influenced by high temperature.

The utility model provides a split mountain drilling machine which comprises a first module, a second module and a remote gas conveying pipe, and the first module and the second module are arranged in a split mode; the first module comprises a hydraulic submodule and a power head assembly which are connected, the hydraulic submodule is used for conveying hydraulic oil to the power head assembly, and the power head assembly is used for driving a drill rod; the second module comprises an air compressor sub-module, the air compressor sub-module is connected with the first module through a remote air conveying pipe, and the air compressor sub-module is used for remotely conveying compressed air to the power head assembly. Through the arrangement, when drilling operation is carried out, after the first module is carried to a drilling operation point, the second module does not need to be carried to the same position along with the first module, the drilling operation can be smoothly carried out by remotely conveying compressed air to the first module through the second module, and the moving distance of the second module is greatly reduced; and personnel allocation for drilling operation can be reduced, single well consumption is reduced, and the drilling working efficiency is improved.

Disclosed are small model pit launch horizontal direction drills suitable for drilling a substantially horizontal bore hole and laying pipe underground from within a surface dug pit. The devices comprise a stationary frame and a carriage component competent to move forward and back along the frame and drill and retrieve an attached drill stem through an aperture in the frame. The carriage components are configured to allow an operator to straddle the carriage and operate the device from a seated position within the frame component interior.

The invention discloses a self-adaptive downhole rock annular cutting groove stress unloading percussion bit and a drilling method, and belongs to the technical field of petroleum drilling engineering. The self-adaptive downhole rock annular cutting groove stress unloading percussion bit comprises a bit connector, a cutting groove unloading barrel body and a percussion bit body; the upper end of the percussion bit matrix is fixedly connected with the lower end of the bit joint; the upper end of the grooving unloading barrel matrix is in axial sliding fit with the lower end of the bit joint; a bit pressure transmission disc spring is arranged in an annular space between the bottom end face of the drill bit connector and the top end face of the annular step. A plurality of annular grooving unloading stress teeth are arranged at the lower end of the grooving unloading barrel matrix; impact crushing teeth are arranged at the lower end of the impact drill bit matrix; when the drill bit reaches the well bottom, the annular cutting groove unloading stress teeth make contact with the well bottom earlier than the impact crushing teeth. Through the structural arrangement of the drill bit, annular grooving of shaft bottom rock is achieved, shaft bottom stress is unloaded, the efficiency of impact rock breaking is improved by reducing the strength of the rock, and the drilling speed is increased.

The invention relates to the technical field of drilling, in particular to a drilling device with an ultra-long drill rod and a drilling method. The super-long drill rod well drilling device comprises a drill bit and a lengthening rod connected to the tail end of the drill bit, a liquid cavity is formed in the lengthening rod, cooling liquid is contained in the liquid cavity, a flow guide cavity is formed in the drill bit, a variable-diameter rod is arranged at the bottom end of the lengthening rod, a variable-diameter cavity is formed in the top of the flow guide cavity, and the variable-diameter rod is arranged in the variable-diameter cavity. Matched thread structures are arranged between the outer wall of the variable-diameter rod and the cavity wall of the variable-diameter cavity, a through hole is formed in the variable-diameter rod, a sinking cavity is formed in the top end of the through hole and communicated with the bottom end of the liquid cavity, the hole diameter of the sinking cavity is smaller than the cavity diameter of the liquid cavity, and the diameter of the sinking cavity is larger than that of the liquid cavity. The bottom end of the through hole is communicated with the flow guide cavity, a heat collection cavity is formed in the bottom end of the flow guide cavity, the heat collection cavity is filled with an expansion medium, and compared with the prior art, the cooling mode has the advantages that cooling liquid is reasonably applied, and waste is reduced.

The invention discloses a half coal rock digging and anchoring all-in-one machine, and relates to the technical field of mining devices, the half coal rock digging and anchoring all-in-one machine comprises a pair of rear drill arm parts arranged on a machine body part, and each rear drill arm part comprises a swing oil cylinder III and a rear onboard jumbolter; a recoil force grading detection mechanism is arranged between the swing oil cylinder III and the rear onboard jumbolter; the recoil force grading detection mechanism comprises a recoil force sensor, a first microswitch, a buffer mechanism and a connecting mechanism. By arranging the recoil force grading detection mechanism, recoil force is transmitted to the mounting plate during working, the mounting plate drives the swing oil cylinder plate to act through the connecting mechanism, the connecting plate of the buffer mechanism triggers a first microswitch firstly and then abuts against a recoil force sensor, and grading detection of the recoil force is achieved; the mechanism solves the problem that the angle deflection of the rear onboard jumbolter is caused by the recoil force but is lack of effective grading detection, avoids the risk of compensation failure caused by the fault of a single detection element, and improves the detection reliability of the recoil force.

The trestle comprises a main bridge, a moving seat and a rock drilling mechanism, the main bridge and the moving seat can move longitudinally, the rock drilling mechanism can swing transversely, the main bridge is provided with a passing part allowing vehicles to pass and a longitudinal moving rail allowing the moving seat to move, the longitudinal moving rail is arranged below or on the side face of the passing part, and the rock drilling mechanism is connected with the moving seat. The excavation method comprises the steps that S1, the main bridge walks in place; s2, the front approach bridge moves forwards to be in lap joint with a to-be-excavated step, a protective cover moves to an avoiding position, a moving seat drives a rock drilling mechanism to move forwards, and the rock drilling mechanism conducts shot hole rock drilling on the to-be-excavated inverted arch end face; s3, the rock drilling mechanism and the front approach bridge retreat to the safety area, and the protective cover moves to the front of the rock drilling mechanism; s4, charging and blasting in each shot hole of the inverted arch, and removing slag; and S5, the steps S2 to S4 are executed repeatedly till the whole construction interval of the inverted arch is excavated. The device has the advantages that the structure is reliable, rock drilling and vehicle passing deslagging can be considered, and the construction progress can be improved.

The invention relates to a soil sampling device for drilling, which comprises an outer drill rod, a sampling rod, an outer sampling pipe, a sampling drill bit, a sealing pipe, a sealing sleeve, an elastic binding belt, a cutting rod and the like, and is characterized in that the foldable sealing sleeve is gradually unfolded along with the entering process of a soil sample, and then the elastic binding belt is tightened to realize effective sample sealing; the overturning type cutting-off rod is driven by the sampling drill bit to evenly cut off a soil sample, disturbance is reduced, the sliding groove is formed between the sealing pipe and the guide rod to prevent mutual rotation, sealing liquid can be provided for the drill bit and the drill block through the through hole, abrasion is reduced, external pollution is blocked, and the device is compact in structure, convenient to install and disassemble, high in sampling efficiency and good in sample integrity. The method is suitable for the fields of geotechnical engineering investigation, environment monitoring and the like.

An electronically controlled full rotary clutch controller includes a drive assembly, an executive assembly and an auxiliary assembly. The device can have two working states: directional drilling and compound drilling. When compound drilling, drilling parameter information is obtained through the main control board, and the data is fed back to a ground processing system, which transmits a control signal to the main control board. The main control board controls a rotating motor, and pushes a screw sleeve and a push block shaft on a ball screw. The push block shaft pushes a push block radially, and a mandrel shell transmits torque to a roller shell through the push block. The roller shell and the mandrel shell rotate together to realize compound drilling. When directional drilling, the main control board reverses the rotary motor, the push block shaft pulls the push block radially, and the roller shell does not rotate.

The utility model discloses an improved gas drainage drill, which belongs to the technical field of coal mine gas drainage and comprises a base, a clamp holder is arranged at one end of the top of the base, a drill rod is clamped in the clamp holder, a movable seat is slidably arranged on one side of the top of the base, and a scraping cylinder is arranged on one side, far away from the movable seat, of the clamp holder. A scraping cylinder is arranged at the inlet end of the clamping device, an arc-shaped scraping plate is arranged in the scraping cylinder, a cleaning cylinder is further arranged on the inner side of the scraping cylinder, an annular communicating pipe is arranged on one side of the cleaning cylinder, and nozzles are arranged on one side of the annular communicating pipe around the drill rod. Sludge on the surface of the drill rod is scraped away through the arc-shaped scraping plate in the drill rod, then the drill rod is brushed away through the cleaning cylinder, residual sludge and water stains on the surface of the drill rod are brushed away through the spray head and the cleaning brush, cleanliness of the surface of the drill rod is guaranteed, and the situation that the sludge enters the interior of the clamp holder, long-time accumulation is caused, and the service life of the clamp holder is affected is avoided.

The invention discloses a reamer electromechanical driving mechanism and method capable of detecting the position state of a blade, and relates to the technical field of tools of petroleum drilling engineering, the reamer electromechanical driving mechanism comprises a power assembly, a lead screw assembly, an ejector rod, a locking assembly, a rotation detector and a displacement detector which are mounted in a drill collar; the power assembly is connected with the lead screw assembly, the lead screw assembly is connected with the ejector rod, the ejector rod is connected with the reamer blade, the power assembly rotates and drives the ejector rod to move up and down through the lead screw assembly, and the ejector rod moves up and down to drive the reamer blade to be unfolded or folded. The locking assembly is assembled on the ejector rod, and after the reamer blade is unfolded in place, mechanical self-locking is conducted on the ejector rod. The rotation detector is assembled beside the lead screw assembly to detect rotation of the lead screw assembly, and the displacement detector is assembled beside the ejector rod to detect up-and-down movement of the ejector rod. The opening and closing state of the cutter wing is measured and uploaded through the rotating detector and the displacement detector, the cutter wing is expanded in place, the underground condition can be judged easily, and controllable multiple reaming is achieved.

The invention relates to the technical field of pre-splitting hole drilling, in particular to a pre-splitting hole angle control device. According to the pre-splitting hole angle control device, the drilling angle and position can be locked during drilling, and the situation that vibration affects the drilling precision is avoided. A pre-splitting hole angle control device comprises a vehicle body, an adjusting frame, a first butt joint frame and the like, the upper side of the right portion of the vehicle body is rotationally connected with the adjusting frame, and the upper side of the adjusting frame is connected with the first butt joint frame. The motor is started to drive the bidirectional lead screw to rotate, so that the limiting frames get close to each other, the first clamping frames are clamped and matched with the limiting frames under the acting force of the torsional springs, the first clamping frames are prevented from moving rightwards, the first clamping frames are locked in a one-way mode, and then the movable frame, the first connecting rod and the adjusting frame are locked; the effects that the air cylinder can be prevented from being damaged when the drilling machine vibrates, and the drilling precision is prevented from being affected are achieved.

The utility model relates to a hole collapse prevention device in a coal seam gas extraction drill hole, which belongs to the technical field of coal seam gas extraction and comprises a central column positioned at the center, and a hole is formed in the central column along the height direction; and an abutting mechanism for resisting the pressure of the coal body and a control mechanism are arranged outside the central column. The multiple abutting mechanisms are arranged on the periphery of the center column and distributed in a circumferential array mode. Each abutting mechanism comprises a connecting plate, and the connecting plates are parallel to the central axis of the central column. And two groups of abutting assemblies which are symmetrically arranged up and down are arranged between the connecting plate and the central column. An irreversible elastic piece is fixedly installed between the center column and the connecting plate, so that the movable plate and the inner wall of the drill hole are confronted, and therefore the drill hole is prevented from collapsing. The abutting mechanism and the control mechanism comprise a plurality of springs, the counterforce is improved, and therefore the hole collapse prevention effect is improved.

The invention discloses a highway bridge construction drilling platform which comprises a drilling platform body fixedly installed at the tail end of an engineering vehicle, an inverted-L-shaped frame, a lifting plate, a spiral drill rod and other key components, a knocking mechanism is arranged on the lifting plate, and the spiral drill rod is driven to do lifting reciprocating motion through transmission of a cylindrical sleeve, an inclined circular plate, an arc-shaped sliding block and a gear; and the platform is further provided with an adjusting mechanism, the drilling depth of the spiral drilling rod is accurately controlled through threaded connection matching of a threaded rod and a threaded sleeve block, and the drilling precision is enhanced. The dust falling mechanism atomizes and sprays a water source to a drilling hole through cooperation of a piston plate, a pull rod and a one-way valve, dust falling is achieved, a third gear at the bottom end of a fixing ring drives a bulldozing plate to conduct circular motion, crushed soil at the drilling hole is moved and transported, and drilling hole backfilling is prevented. And efficient, accurate and environment-friendly highway bridge construction drilling operation is achieved.

The invention discloses a while-drilling hole imaging detection method and device, and belongs to the technical field of geophysical image detection.The while-drilling hole imaging detection device comprises a front detector probe rod and a rear-end drill rod in threaded connection with the front detector probe rod, the front detector probe rod comprises a first outer sleeve and a first inner drill rod arranged in the first outer sleeve, and the first inner drill rod is in threaded connection with the rear-end drill rod; a camera is arranged in one inner drill rod, and an electronic plate is arranged on one side of the camera. The rear end drill rod comprises a second outer sleeve and a second inner drill rod arranged in the second outer sleeve. According to the imaging detection method and device for drilling while drilling, in the drilling process, the imaging detection method and device can be installed on a drill bit to conduct imaging detection for drilling while drilling, the detection cost is greatly reduced, and the underground operation efficiency is improved.

The invention provides an efficient deep hole rotary drilling rig, and relates to the technical field of rotary drilling rigs. The efficient deep hole rotary drilling rig comprises a rotary drilling rig body and a drilling bucket. The drilling bucket comprises a barrel, a drilling claw assembly and a switch piece. The drilling claw assembly comprises a plurality of drilling claws and a plurality of drill bits; the drilling claw comprises a side plate, a bottom plate, a collecting piece and a limiting block; the side plates and the bottom plate are integrally formed, the bottom plate is provided with a soil inlet, the collecting piece is installed below the bottom plate, the limiting block is rotationally connected with the barrel, the limiting block is provided with a limiting hole, and the drill bit is installed at the bottom of the collecting piece. The switch piece comprises a motor, a turbine and a worm; the motor is installed on the barrel and electrically connected with the rotary drilling rig body, the turbine is installed on an output shaft of the motor, the worm is matched with the turbine and penetrates through the barrel, and the output end of the worm is matched with the limiting hole. The efficient deep hole rotary drilling rig solves the technical problems that according to an existing rotary drilling rig, opening and closing of a drilling bucket are tedious, and the rotary drilling efficiency is low.

The invention discloses an underground coal mine large-diameter directional drilling system and a hole forming method. The system comprises a directional drill bit, a single-bend screw motor, a non-magnetic drilling tool, a packing cross short section, a double-wall drilling rod and a double-channel water injection and slag discharge device which are connected in sequence, and a mud pulse measurement-while-drilling instrument is arranged in the non-magnetic drilling tool; the packing crossed short section comprises a short section body and a limiting connector which are connected, and the outer wall of the short section body is sleeved with a sliding sleeve. A double-wall drill rod local reverse circulation mode is adopted for deslagging, compared with a conventional direct circulation mode, the circulating water amount needed for deslagging is greatly reduced, the water supply and pollution discharge requirements of a directional drilling site are greatly reduced, the rated discharge capacity and power of a matched slurry pump are greatly reduced, circulating water flows in an annular channel and a center channel of the double-wall drill rod, and the water supply efficiency is greatly improved. The overflow section is not influenced by the hole wall stratum, the reverse circulation flow deslagging efficiency is high, the cleaning effect in the hole is good, and the technical problems that the amount of circulating flushing liquid needed by a conventional large-diameter directional hole drilling system is large, and the hole wall stability maintaining capacity is poor are solved.

A method performed while drilling a wellbore in a subsurface formation with a drill bit. The method comprises obtaining sonic logs of the subsurface formation proximate the drill bit. The method comprises determining mechanical specific energy based on drilling parameters. The method comprises comparing respective trends of the sonic logs and the mechanical specific energy of the drill bit to identify a cause for a change in drilling performance of the drill bit. The method comprises performing a drilling operation based on the cause for the change in the drilling performance.

The invention relates to the technical field of engineering detection, in particular to concrete drilling and coring equipment for engineering quality supervision, which comprises a rack and a control system for controlling the equipment to operate, moving assemblies used for driving the equipment to move, drilling assemblies used for drilling concrete samples and coring assemblies used for taking the concrete samples are symmetrically arranged on the two sides of the rack. The coring assembly comprises a coring support fixedly connected to the side, away from the drilling assembly, of the rack, and the top of the coring support is fixedly connected with a first telescopic piece. The control system is used for controlling the first telescopic piece to stretch out and draw back. An output shaft of the first telescopic piece penetrates through the coring support and is coaxially and detachably connected with a coring barrel. Functional channels are formed in the side wall of the coring barrel in the circumferential direction of the coring barrel, and vertical guide rods are vertically arranged in the functional channels in a sliding fit mode. According to the invention, the vertical guide rod is utilized to drive the inclined wedge block to cooperate with the cut-off piece, so that multi-directional and multi-angle impact and cut-off of a concrete sample are realized, and the fracture of the sample is ensured to be flat.

The invention relates to the technical field of geological punching, and particularly discloses geological punching equipment for mining, which comprises driving equipment capable of three-dimensionally adjusting, a mounting disc is fixedly mounted at the bottom end of the driving equipment, and a middle shaft is rotatably mounted in the mounting disc; and a rotating cylinder arranged outside the middle shaft in a sleeving mode is rotationally installed in a groove formed in the bottom end of the installation disc, a drill bit is fixedly installed at the end, extending out of the rotating cylinder, of the middle shaft, a spiral conveying groove is formed in the outer wall of the drill bit, and a soil inlet gap is formed between the rotating cylinder and the drill bit. According to the device, the soil inlet gap is formed between the drill bit and the rotating cylinder, so that muck generated during drilling of the drill bit enters the rotating cylinder, the muck is conveyed out of a blast hole along the rotating cylinder through the spiral piece, and the muck can be conveyed in a dry-type soil moving mode; and the phenomenon that the explosion performance or the explosion effect of explosives in the blast hole is affected by too high water content in the blast hole after slurry circulation is avoided.

The invention relates to the technical field of mining machinery, and discloses a portable drilling device for ground source heat energy construction, comprising: a frame of a movable structure; the screwed joint is rotationally mounted on the frame, external threads are arranged on the outer side of the screwed joint, and slurry flows in the screwed joint; the rod dismounting barrel is integrally connected to the lower side of the threaded connector; the lifting groove is formed in the outer side of the rod unloading cylinder and is in an inverted L shape; external threads and internal threads are respectively arranged at two ends of the drill rods; the outer convex shell is connected to the outer ring side of the internal thread end of the drill rod; the through hole is formed in the side wall of the drill rod, so that the inner side of the drill rod is communicated with the interior of the outer convex shell; the upper end of the limiting plate is rotationally mounted at the upper part inside the through hole; the elastic piece is connected between the limiting plate and the inner side of the outer convex shell, so that the lower end of the limiting plate rotates into the drill rod; according to the invention, the integrally-connected rod dismounting cylinder is adopted, so that an independent rod dismounting device does not need to be mounted and dismounted, and the loss risk is avoided; and in cooperation with the drill rod with the elastic limiting plate, the rod dismounting action is accurate and stable, and the rod dismounting efficiency is improved.

The invention discloses a variable-angle directional drilling and rock core fidelity packaging device which comprises an assembly bottom frame, an adjustable directional drilling mechanism and a self-sealing fidelity mechanism. The adjustable directional drilling mechanism comprises a drilling directional frame, a pair of bearing hydraulic cylinders are hinged and assembled between the drilling directional frame and the assembly bottom frame, a sliding assembly frame is assembled above the drilling directional frame in a sliding mode, and a driving motor is fixedly assembled on one side of the sliding assembly frame. The self-sealing fidelity mechanism comprises a clamping driving head, a sampling rock core pipe is assembled at one end, away from the driving motor, of the clamping driving head in a clamping manner, and a self-sealing sampling drill bit is assembled at one end, away from the clamping driving head, of the sampling rock core pipe in a clamping manner. By arranging the adjustable directional drilling mechanism and the self-sealing fidelity mechanism, the application range of the rock core drilling device is greatly widened, the sampling stability of rock core samples is guaranteed, and the application range and the sampling stability of rock core sampling are remarkably improved.

The utility model relates to the field of drilling tools for wells, in particular to a self-adaptive rotary steering drilling tool which comprises a drill bit body and a damping column, a plurality of blades are sequentially arranged on the crown portion of the drill bit body in the circumferential direction, the cutting faces of the blades are fixedly connected with a plurality of cutting teeth, and mounting holes are formed in the outer side faces of the blades. Steel sleeves are fixedly arranged in the mounting holes, the damping columns are movably inserted in the steel sleeves, the ends, located in the steel sleeves, of the damping columns are fixedly connected with connecting bases, adjusting plates are arranged between the connecting bases and the bottoms of the steel sleeves, and outer-layer low-rigidity spiral springs are connected between the adjusting plates and the connecting bases. An inner layer high-rigidity conical spring is arranged on the inner side of the outer layer low-rigidity spiral spring, and an adjusting assembly for adjusting the adjusting plate and the bottom of the steel sleeve is arranged on the steel sleeve. The drill bit can better adapt to different pressure requirements, and the drill bit is prevented from bearing overlarge impact force, so that the cutting teeth are protected, and the service life of the drill bit is prolonged.

The invention relates to the field of drilling devices, in particular to a bridge pile foundation drilling device which comprises a supporting chassis and a supporting frame. A controllable rotary drill unit; the compression locking units are symmetrically arranged on the outer side of the supporting chassis, fixedly connected with the supporting chassis and connected with the controllable rotary drill unit; the synchronous cleaning unit is arranged on the outer side of the controllable rotary drill unit and connected with the supporting chassis; the impact stone breaking unit is arranged on the inner side of the controllable rotary drilling unit; wherein the controllable rotary drilling unit comprises an automatic rotary drilling assembly, a torque control assembly and an induction type regulation and control assembly, by arranging the controllable rotary drilling unit, rotation and lifting of a drilling rod can be synchronously achieved, hard rocks or other soil layers with high hardness in the drilling process are subjected to impact crushing, and the drilling efficiency is improved. And the torque of the drill rod is adjusted, so that the equipment can drill through soil layers with different hardness.