1828results about "Earth drilling tools" patented technology

The rock stratum drilling equipment for geological exploration comprises a base fixedly supported on the ground through an external support, one side of the base is fixedly connected with an n-shaped frame, movable grooves are formed in the symmetrical positions of the two sides of the n-shaped frame, and the inner walls of the movable grooves in the two sides are movably connected with movable blocks which do lifting reciprocating motion; a fixed plate is fixedly connected to one side of the movable block, a spline shaft driven by a power mechanism to rotate is connected to the fixed plate in a penetrating and fixed-axis rotating mode, the outer contour of the bottom end of the spline shaft is sleeved with a drill rod conducting lifting reciprocating motion, and a drill bit conducting drilling is fixedly connected to the bottom end of the drill rod. A through hole allowing the drill bit to move for drilling is formed in the position, corresponding to the drill bit, of the base, a knocking mechanism for driving the drill rod to do lifting reciprocating motion is arranged on the fixing plate, the drill rod is moved to smash a rock stratum, and the drilling efficiency is improved.

The invention discloses a three-foot portable multi-angle underwater adsorption anchoring drilling device. The drilling machine feeding component is installed on the drilling machine main body platform in a vertically movable mode, the three-foot supporting component is composed of a main foot and an auxiliary foot, the main foot and the auxiliary foot are installed on the drilling machine main body platform in an angle-adjustable mode, the main foot and the auxiliary foot are each provided with a micro-needle rotational flow suction cup, and after the micro-needle rotational flow suction cups suck the wall face of a to-be-drilled structure, the micro-needle rotational flow suction cups suck the wall face of the to-be-drilled structure. The drilling machine feeding component drills a to-be-drilled structure, the drilling machine feeding component achieves feeding and resetting of the drilling machine through positive and negative rotation of the motor so as to adjust the drilling operation depth, and the three-foot supporting component can change the feeding angle of a drill bit so as to meet the operation requirements of different drilling angles. The multi-angle drilling device can achieve multi-angle drilling operation in the repairing process of surface cracks of dams with different curvatures, meanwhile has the operation capacity in the complex water flow environment, can replace manual operation and improve the operation efficiency, and is easy to carry and store, wide in application range, safe and reliable.

Provided is an adhesion suppressing member that is configured to suppress a work piece from adhering to a work tool of a construction machinery. The adhesion suppressing member is formed in a plate shape and includes, on a front surface thereof, a resin material having a water repellent property. The adhesion suppressing member is installed at a predetermined portion of the work tool such that the front surface forms a part of a surface of the work tool held in contact with the work piece.

The invention relates to the technical field of drilling devices, and discloses a coal mine goaf working face drainage hole drilling device which comprises a base, and a plurality of supporting stand columns are fixedly arranged at the bottom of the base. When the device is used and used for drilling operation, the reaming function can be achieved through overturning of the drilling pieces, the supporting barrel can smoothly enter a hole, slurry, drilling slag and cooling water can be rapidly discharged through the flow guide grooves in the supporting barrel, and the situation that a drill bit is stuck due to too much drilling slag is avoided; according to the drilling tool, the phenomenon that the drilling tool and the supporting barrel are clamped in the drilling process can be avoided, in the drilling process, through the interaction of the clamping groove and the trapezoidal clamping block, the pointed-end inserting rod is inserted into the inner wall of the hole to fix the supporting barrel, the supporting barrel is left in the hole, the hole is effectively prevented from collapsing through supporting at different positions, and meanwhile the drilling tool is convenient to use. In the pulling-out process, friction between the drill rod and the supporting roller drives the cleaning roller brush to rotate, and the outer wall of the drill rod is cleaned.

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 an urban road construction pavement hole forming device which comprises an equipment frame and a moving frame located in the equipment frame, a pushing mechanism matched with the moving frame is arranged on the equipment frame, a drilling mechanism is arranged in the moving frame, and a cleaning mechanism is arranged on the drilling mechanism. The invention relates to the technical field of road construction. According to the pavement hole forming device for urban road construction, a third hydraulic telescopic rod is controlled to extend to push a protection box to move downwards, the protection box can drive a rotating rod and a spiral drilling piece to move downwards, meanwhile, a motor is controlled to drive the rotating rod to rotate, the rotating rod drives the spiral drilling piece to rotate, and the spiral drilling piece rotates downwards to drill the ground; and soil in the hole enters the soil guide cylinder and overflows upwards, and the overflowed soil falls into the annular cylinder, so that the soil in the hole can be well collected, the soil is effectively prevented from flowing back into the hole, manual cleaning is not needed, and cleaning is convenient.

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 the technical field of rotary jet grouting, in particular to a rotary jet grouting method grouting slurry mixing device and method.The rotary jet grouting method grouting slurry mixing device comprises a drilling machine vehicle body, a punching mechanism is installed on the drilling machine vehicle body, a slurry spraying mechanism is installed on the punching mechanism, a protection mechanism is installed on the slurry spraying mechanism, and a guide mechanism is installed at one end of the drilling machine vehicle body; a cleaning mechanism is installed on the guide mechanism, and a supporting mechanism is installed at the bottom of one end of the drilling machine vehicle body. Through cooperation of the punching mechanism and the supporting mechanism, stable drilling work on the ground is achieved, mortar can be sprayed out and is not prone to solidification through the mortar spraying mechanism, one side of the mortar spraying mechanism can be shielded and protected through the protection mechanism, it is prevented that mortar cannot be sprayed due to gravel blockage, the protection mechanism is driven by the mortar spraying mechanism to slide, and mortar spraying work is achieved; and mixed pouring of mortar and gravel in the hole is facilitated.

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.