5197 results about "Drill pipe" patented technology

The present invention relates to a coal mine intelligent directional drill and its drilling method, belonging to the technical field of coal mine drills. It comprises a moving platform, machine frame, clamper, main manipulator, power head, drill pipe storage system, control system, and hydraulic system. The power head structure is improved by adding an angle adjuster with accurate angle adjustment, locking, and anti-rotation functions. The angle adjuster is positioned on the gearbox side opposite the main motor, connected via a driving shaft. The control system includes a toolface azimuth detection and initialization system that works with the angle adjuster. This solves prior issues such as the absence of specialized toolface azimuth adjustment devices, low precision, low track adjustment efficiency, and challenges in achieving automatic directional drilling in the prior art. The invention enhances precision and efficiency, enabling automated, intelligent directional drilling.

The invention provides a storage type time-depth logging method, and relates to the technical field of logging control, and the method comprises the steps: obtaining an encoder, tension and acceleration data, and drawing an encoding curve, a tension curve and an acceleration curve. And receiving an effective movement time interval of single complete drilling rod operation intercepted by the user according to the curve characteristics. And for the original coding curve section of each interval, the total variation and the total duration of the coding value are kept unchanged, and the coding value and the time point are matched again according to the layered scale relationship between the encoder data and the actual displacement of the hook, so that a corrected target coding curve is obtained. And all the target coding curves are converted into time-depth curves according to the depth interval corresponding to each drill rod, and a time-depth file is generated through splicing according to the operation sequence of the drill rod operation event interval. According to the scheme, the technical problem of how to improve the precision of storage type time-depth logging depth measurement and the reliability of the whole system is solved.

The invention discloses an anti-jamming coal mining drilling machine with drilling and multidirectional impacting functions and a using method thereof.The anti-jamming coal mining drilling machine comprises a drilling machine body, a high-pressure driving mechanism is arranged on the drilling machine body through a multidirectional guide rail mechanism, and a drilling assembly is connected with the high-pressure driving mechanism; when the drilling machine works, the high-pressure driving mechanism drives the drill rod and the drill bit to conduct rotary drilling, the high-frequency transverse vibration mechanism synchronously generates transverse high-frequency vibration, the high-pressure driving mechanism drives the drill rod and the drill bit to conduct rotary drilling, and the high-frequency transverse vibration mechanism drives the drill rod and the drill bit to conduct rotary drilling. The friction force between the drill bit and rock is reduced, debris accumulation is prevented, efficient deslagging is achieved, when hard rock or drill jamming occurs, the longitudinal vibration impact mechanism triggers longitudinal vibration, impact and drill jamming prevention functions are achieved through cooperative work of transverse vibration and longitudinal vibration, the drill jamming problem under the complex geological condition is effectively solved, the drilling efficiency and equipment reliability are improved, and the drilling cost is reduced. The device is suitable for drilling operation of mining roofs and baseplates, sides and the like.

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

The invention relates to an automatic drill rod loading and unloading mechanism and method, and the automatic drill rod loading and unloading mechanism comprises a crawler-type moving frame, a mast, a drill rod separating and storing mechanism, a drill rod clamping and conveying mechanism, a drill rod butt joint auxiliary guiding and locking mechanism and a controller, the mast is hinged to the right side of the crawler-type moving frame, and a drill rod hydraulic clamping device is arranged at the bottom of the mast; a power head capable of moving up and down is arranged on the mast, a lengthened main shaft is arranged on the power head, the drill rod separating and storing mechanism comprises a drill rod storing mechanism and a drill rod separating and conveying mechanism, the drill rod clamping and conveying mechanism comprises a swing driving mechanism, a swing arm and a drill rod clamping assembly, and the drill rod butt joint auxiliary guiding and locking mechanism is arranged on the power head. By means of the mechanism, automatic loading and disassembling of the drill rod can be achieved, the loading and disassembling efficiency of the drill rod can be greatly improved, meanwhile, the labor intensity of manual operation and the safety risk can be reduced, and therefore the drilling efficiency can be improved.

Disclosed in the present invention is a rock porosity prediction method based on the inversion of few-shot while-drilling data. While-drilling parameters of a drilling rig during a laboratory or on-site drilling process are collected, wherein the while-drilling parameters comprise parameters such as torque M, thrust force F, rotation speed N, penetration rate V, drill pipe amplitude A and vibration acceleration a; different types of while-drilling parameter data which have been subjected to multiple instances of denoising processing are inputted into a BP-GA model for outlier removal, data augmentation and iterative calculation, so as to form a new while-drilling data set; and while-drilling parameter time-frequency domain feature maps of rocks having different porosities are inputted into a VG-CNN prediction model, an inversion model between while-drilling parameter time-frequency domain features and the porosities is obtained by means of training and learning, and finally inversion prediction is performed on the rock porosities on the basis of on-site real-time while-drilling parameters. The present method enables fast, accurate and quantitative inversion and prediction of rock porosities on the basis of a small amount of borehole while-drilling data.

The invention discloses a preparation method of a precise seamless steel tube for a drill rod of a rotary drilling rig, and relates to the field of steel tubes. Comprising the following steps that raw materials are prepared and smelted, molten iron or high-purity waste steel with low phosphorus content, low sulfur content and low gas content is selected as a main raw material, and then the main raw material is subjected to external refining, component fine adjustment and continuous casting and blank treatment; hot piercing is carried out, specifically, the continuous casting round billet is loaded into an annular heating furnace, a multi-section heating system is adopted for heating, and then hot piercing treatment is carried out in a two-roller skew rolling piercing machine; hot rolling extension is conducted, specifically, the perforated tubular billet is rapidly fed into an online heating furnace, and then rolling is conducted on a multi-rack retained core rod or full-floating core rod continuous pipe rolling machine; and sizing / reducing, and rapidly heating. The steel pipe has rigidity, strength and humanity, the fatigue life of the steel pipe is prolonged, meanwhile, the surface smoothness of an inner hole is high, the dimensional tolerance of the inner diameter and the outer diameter is accurate, the wall thickness uniformity is high, the straightness is good, and in addition, the steel pipe also has high internal cleanliness and good wear resistance.

The invention belongs to the technical field of drilling tools, and relates to an anti-loose self-locking through cable drill rod and a locking method thereof.The drill rod comprises a drill rod body, and supporting seat mounting holes are formed in the two ends of an inner cavity of the drill rod body; the first supporting seat and the second supporting seat are arranged at the supporting seat mounting holes in the two ends of the drill rod body respectively; the first supporting seat and the second supporting seat are both of a circular ring structure, the outer ring of the circular ring structure abuts against the inner wall of the drill rod body, and the inner ring abuts against the outer ring of a through cable installed in the drill rod body. At least one of four contact surfaces, in contact with the inner wall of the drill rod body and the outer ring of the through cable, of the first supporting seat and the second supporting seat is selected as a relatively rotatable contact surface, and the other three contact surfaces are used as circumferential fixed contact surfaces; the circumferential fixed contact face is embedded into the sliding groove through the anti-rotation protrusion for circumferential locking, and the relative rotating contact face is subjected to circumferential locking through a self-locking mechanism after the through cable is installed, so that self-locking of the drill rod body and the through cable is achieved.

The utility model provides a mine branch draw shaft drilling transmission mechanism, belongs to the technical field of mine construction, and is used for drilling a plurality of parallel blast holes in the branch draw shaft construction process. The transmission mechanism comprises a drilling power source and a universal coupling, a plurality of transmission wheels are rotationally arranged on the drilling base plate, and transmission structures are arranged on the peripheries of the transmission wheels; the transmission wheels comprise at least one driving wheel and a plurality of driven wheels, the positions of the driving wheels are fixed, the positions of the driven wheels on the drilling base plate can be adjusted, penetrating shaft holes are formed in the centers of the driven wheels, the sections of the shaft holes are polygonal, and the shaft holes are in sliding fit with the drilling rod. The driving wheel and the driven wheel synchronize power through a transmission structure, and power is transmitted between the driving wheel and the drilling power source through a universal coupling. The mechanism effectively solves the problem of drilling parallel blast holes in branch draw shaft construction, improves the construction efficiency and accuracy, has the advantages of simple structure, convenience in operation, high adaptability and the like, and remarkably improves the automation level of mining.

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 relates to the technical field of mine drilling, and discloses a fractured drill rod taking-out device which comprises a guide rod and a drill rod body, the outer diameter of the guide rod is smaller than the inner diameter of the drill rod body, the end, close to the drill rod body, of the guide rod is arranged to be in an arc shape, and the fractured drill rod taking-out device further comprises a positioning assembly used for clamping the inner wall of a fractured drill rod. The positioning assembly is arranged on the surface of the guide rod and comprises a plurality of movable plates hinged to the surface of the guide rod, a rotating shaft is rotationally connected to the axis position in the guide rod, right-hand threads are formed in the surface of the rotating shaft, push blocks are arranged on the sides, close to the interior of the guide rod, of the movable plates, and the push blocks are connected with the movable plates through connecting blocks; a moving block is arranged in the push block, and a plurality of balls are movably connected to the bottom of the moving block. The outer diameter of the guide rod is reduced, the guide rod is eccentrically inserted into the fractured drill rod, the outer expanding movable plate is matched to tightly clamp the inner wall of the fractured drill rod, and the fractured drill rod taking-out efficiency is improved.

The invention discloses a weldless integral high-strength feeding drill rod and a preparation method thereof. The drill rod comprises a female connector, an elevator groove, a thick-wall slip clamping section, a drill rod pipe body and a male connector which are integrally formed and have the same inner diameter. The drill rod is manufactured by integrally machining a solid bar or a thick-wall pipe body. The yield strength of the drill rod pipe body, the yield strength of the thick-wall slip clamping section and the yield strength of the elevator groove are 135 ksi-180 ksi, and the yield strength of the male connector and the yield strength of the female connector are 130 ksi-150 ksi; the outer diameter of the thick-wall slip clamping section is larger than that of the drill rod pipe body; the outer diameter of the elevator groove is smaller than that of the clamping section of the thick-wall slip; the outer diameter of the elevator groove is not smaller than that of the drill rod pipe body. The outer diameter of the connector does not need to be obviously increased, meanwhile, enough elevator lifting capacity is guaranteed, and the problem of poor structure performance caused by friction welding seams and welding area heat treatment is avoided. Complicated welding, postweld heat treatment and other procedures are omitted, the possibility that a weld joint serves as a performance weak link is avoided, higher comprehensive tensile mechanical performance is achieved, and the method is suitable for well drilling application of extra-deep wells, ocean deep wells and the like.

The invention relates to the field of composite materials, in particular to wear-resistant paint for a drill rod, a preparation method of the wear-resistant paint, the drill rod with a surface wear-resistant coating and a preparation method of the drill rod. The preparation method of the wear-resistant coating for the drill rod comprises the following steps: S1, performing high-temperature oxidation treatment on composite powder of silicon carbide and diamond to obtain pretreated composite powder; s2, mixing the pretreated composite powder obtained in the step S1 with a silane coupling agent solution, heating and stirring, and then drying to obtain surface modified composite powder; s3, mixing epoxy resin with a toughening agent and a defoaming agent, heating, then adding the surface modified composite powder obtained in the step S2, uniformly mixing, and defoaming to obtain mixed slurry; s4, mixing the mixed slurry obtained in the step S3 with a curing agent, and defoaming to obtain the wear-resistant coating. The wear-resistant paint provided by the invention can form a coating with high wear resistance and high toughness on the surface of the drill rod.

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 pipe jacking construction device and method based on an artificial freezing technology, and belongs to the technical field of pipe jacking construction, the pipe jacking construction device comprises a base, a side plate vertically fixed at the rear end of the base, hydraulic oil cylinders symmetrically mounted at the two ends of the inner side of the side plate, and a jacking table fixed between the output ends of the hydraulic oil cylinders. The strip-shaped grooves are evenly formed in the outer side edge of the top table in an annular array mode, the sliding bases are slidably arranged in the strip-shaped grooves, the hydraulic chucks are rotatably installed on the sliding bases, the hydraulic chucks can be used for fixing the drill rod during use, the drill rod is driven to rotate through the drilling motor, and therefore in the using process of the device, the drilling efficiency of the drill rod is improved. A drill rod can be inserted into soil, a hole for installing a freezing pipe is formed in the outer side of a pipe jacking channel so that the freezing pipe can be conveniently inserted and installed, the functionality of the device is improved, in addition, when the device is used, the interval adjusting mechanism is matched, the hole opening position during freezing pipe installation can be adjusted according to the outer diameter of the pipe jacking, and practicability is higher.

The invention discloses a drilling and cutting head, a drilling and cutting device, a gob-side entry retaining slotting method and a roof cutting pressure relief method, and belongs to the technical field of mine drilling and cutting. The drilling and cutting head comprises a vehicle body, a drilling rod and the drilling and cutting head, and the vehicle body is rotationally provided with a drilling rod conveying driving mechanism through a connecting base and a rotary table; a water cutting system is further installed on the vehicle body. The drilling and cutting head comprises a mounting seat, a plurality of drill bit seats and drill bit blocks, an inner cavity is formed in one end of the mounting seat, and mounting holes are formed in the side wall of the mounting seat; a spray hole is formed in the middle of the spray head. And the end part of the inner cavity of the drilling and cutting head is connected with the head drill rod. Through one device, two operation procedures of drilling and water cutting can be achieved, high efficiency of the gob-side entry retaining slotting method and the top cutting pressure relief method can be achieved, the device cost is effectively reduced, the device can be flexibly and conveniently used in a roadway, the operation efficiency is effectively improved, and the device cost is reduced.

The invention relates to the field of tunnel engineering, and discloses a vertical drilling and grouting all-in-one machine for micro-disturbance grouting in a subway tunnel hole and a technological method.The vertical drilling and grouting all-in-one machine comprises a base used for supporting the whole device, a sliding rail is installed on the inner wall of the base, and a supporting frame is installed at the end, close to the center line of the base, of the sliding rail; a drilling and injecting mechanism is arranged on the outer wall of the sliding rail, and a sealing assembly is arranged on the upper surface of the base. The drilling and injecting mechanism comprises a sliding frame, the sliding frame is slidably connected to the outer wall of the sliding rail, the front surface of the sliding frame is fixedly connected with a supporting plate, the lower surface of the supporting plate is rotatably connected with a drilling rod, and the lower end of the drilling rod is in threaded connection with a connector. According to the drilling and grouting device, the drilling and grouting mechanism is arranged, the hollow drill rod is adopted for drilling, during grouting operation, drilling operation can be achieved through rotation of the drill rod, then the drill rod can be directly connected with grouting equipment, and therefore grouting can be achieved through the drill rod directly.

The utility model relates to the technical field of geological survey marking, and discloses a geological survey marking device convenient to install, which comprises a main body structure and an auxiliary structure, the outer wall of the main body structure is fixedly connected with the auxiliary structure, the main body structure comprises a shell, and a storage box is slidably connected in the shell. A strong spring is fixedly connected to the inner wall of the storage box, one end of the strong spring is fixedly connected with a push plate, a plurality of sets of marking rods are vertically placed in the storage box, the auxiliary box is placed on the ground needing to be marked, a control motor is started to work, the output end of the motor drives a drill rod and a ground breaking drill bit to rotate, and the marking rods are arranged on the ground. Then the lifting air cylinder is controlled to work, the output end shrinks to drive the carrying plate to move downwards, meanwhile, the ground breaking drill bit continuously moves downwards when drilling the ground, the ground breaking drill bit can conveniently go deep into the deeper position of the ground and crush a hard soil layer, in this way, workers can conveniently insert the marking rod, and the marking rod can go deep into the soil layer and is not prone to falling down.

The invention belongs to the field of drilling, and particularly relates to a large-diameter cluster type pneumatic down-the-hole hammer raise-boring reamer bit and a drilling method.The bit comprises a center pipe, a cluster body, an air chamber, a down-the-hole hammer, a synchronous check valve, an air chamber pressure balance control assembly and a concave slag falling channel and is used for transmitting torque and rotating speed and conveying high-pressure air; the top of the central pipe is sleeved with a flange used for being connected with a drill rod, the central pipe is sequentially sleeved with a front guide wing plate, an upper fixing plate, a middle plate, a high-frequency rear seat, an air chamber peripheral cylinder and an air chamber lower cover plate in the extending direction of the central pipe, and the front guide wing plate, the upper fixing plate, the middle plate, the high-frequency rear seat, the air chamber lower cover plate and the central pipe jointly form a cluster body; two ends of the air chamber peripheral cylinder are respectively connected with the high-frequency rear seat and the air chamber lower cover plate to form an air chamber; according to the drill bit, the multiple down-the-hole hammers are integrated through the cluster body, efficient rock breaking and continuous slag discharging are achieved in combination with air chamber energy gathering, synchronous check valve control and a concave slag falling channel, and the drilling efficiency is improved by more than 10 times.

The invention relates to the technical field of mine underground equipment, in particular to crawler-type high-gas coal seam drilling equipment based on a double-channel drill rod, which comprises a walking chassis, the double-channel drill rod, a hydraulic slotting system and a negative pressure deslagging device. Crawler-type composite drilling equipment is provided, process integration is carried out through breakthrough of three core technologies, directional drilling (a diamond drill bit and a spiral groove drill rod), hydraulic slotting and negative pressure deslagging are integrated into single equipment, the working procedure switching time is shortened, synchronous slotting and deslagging operation is achieved through a double-channel drill rod, and the working efficiency is improved. The problems of energy consumption and blockage are solved; and meanwhile, gas accidents are prevented.

The invention belongs to the technical field of geotechnical engineering drilling, and particularly relates to an instant pipe-following anti-falling object device for broken stratum drilling, which comprises a drilling machine power head and a drilling rod, a drill bit is arranged at one end of the drilling rod, an inner wall protection sleeve is arranged outside the drilling rod, and the inner wall protection sleeve is connected with the drilling machine power head through a linkage assembly. An outer wall protection sleeve is arranged outside the inner wall protection sleeve, the outer wall protection sleeve and the inner wall protection sleeve are connected through an elastic assembly, a sliding fit clearance cavity is formed between the outer wall protection sleeve and the inner wall protection sleeve, and a sliding guide assembly and a permanent magnet assembly are arranged in the sliding fit clearance cavity; a sensing assembly and a propelling assembly are arranged on the drill rod; according to the device, by integrating the linkage assembly, the elastic assembly, the permanent magnet assembly and the central controller, instant synchronous movement of the wall protection sleeve and the drill bit is achieved, hole wall collapsing objects are effectively blocked, drill burying and drill jamming accidents are completely eradicated, and the construction efficiency is improved.

The invention relates to the technical field of building construction, in particular to a large-diameter rotary excavating hole forming and long spiral cast-in-place pile combined construction method under special geology. Comprising the following steps: S1, positioning a pile foundation; and S2, a rotary drilling rig is used for installing a cutting tooth cylinder drill for drilling, and in the drilling process, a steel casing is synchronously followed up to support the hole wall. And S3, after the rotary drilling rig drills through the hard barrier layer, a drilling tool is replaced with a double-bottom cutting tooth bailing drilling bucket, and broken objects in the steel casing are cleaned. And S4, the cleaned holes are backfilled with plain soil to the ground surface. And S5, the steel casing is pulled out of the backfilled plain soil. And S6, a long spiral drilling machine is used for drilling in the backfilled pile position till the designed elevation is reached. And S7, concrete is poured to the position above the designed pile top elevation through a drill rod center pipeline of the long spiral drilling machine. And S8, after the concrete is poured, the reinforcement cage is implanted into the pile hole filled with the concrete. According to the method, the advantages of the two pile forming processes are combined, and continuous and reliable pile forming operation is expected to be achieved under the complex geological condition.

The invention provides equipment and a method for testing the emission amount of harmful gas in a tunnel, and relates to the technical field of tunnel construction. Comprising a sleeve, a gas parameter testing unit installed on the sleeve, a water tank communicated with the interior of the sleeve and a gassing module installed on the water tank, and the gassing module is connected with the gas parameter testing unit; one end of the sleeve can be dynamically sealed with the drill rod, and the other end of the sleeve is of an opening structure; the gassing module is used for separating out gas in water and conveying the gas to the gas parameter testing unit; and the gas parameter testing unit is used for detecting the concentration and flow velocity of harmful gas in the sleeve and the concentration of harmful gas separated out from water. A gas parameter testing unit is arranged to monitor the data change of gas gushing out of the drill hole in real time; the gassing module can separate out gas in water in real time and convey the gas to the gas parameter testing unit to measure the concentration of dissolvable gas, so that the calculation of the emission amount is more comprehensive and accurate.

The invention relates to the technical field of pile foundation construction, in particular to a long spiral secant pile construction method under water conservancy anti-seepage complex geological conditions, and the construction method comprises the steps that a long spiral pile driver is provided with a first power head and a second power head, a sleeve is pressed downwards through the second power head, and then the first power head is used for driving a drill rod to drill; the sleeve and the drill rod drill down synchronously until the drill bit drills to the elevation of the bed rock surface to form a pile hole; the sleeve is left in the pile hole, the rotary drilling rig is used for drilling the bed rock, a drill rod of the long spiral pile driver is put down to the bottom of the pile hole, concrete is pumped into the pile hole, and when the concrete is poured to the bed rock surface, the drill rod and the sleeve are lifted while the concrete is pumped into the pile hole till pressure pouring is completed. In a complex stratum with a huge thick loose high-permeability sandy gravel covering layer and ultrahigh-strength hard bed rock coexisting, high-precision stable hole forming and collapse prevention are achieved at the same time, hard rock is reliably and accurately drilled to reach the designed depth, and it is ensured that concrete secant piles are tightly engaged to form a continuous and effective diaphragm wall.

The invention belongs to the technical field of petroleum drilling, and particularly relates to a mud scraping disc and a mud scraping device. The mud scraping disc is an elastic spiral mud scraping disc which surrounds the periphery of the drill rod by at least one circle; the mud scraping disc comprises supporting rings and mud scraping rings, and the supporting rings are spirally stacked in sequence; the outer rings of the mud scraping rings are connected with the inner rings of the supporting rings, the inner rings of the mud scraping rings are attached to the peripheral face of the drill rod, the thickness of the mud scraping rings is smaller than that of the supporting rings, and gaps are reserved between the mud scraping rings in the axial direction. The mud scraping disc is used for solving the problems that the mud scraping disc is not thorough in scraping and inconvenient to install. The spiral mud scraping disc surrounds the periphery of the drill rod, the mud scraping disc forms a whole, the supporting rings are arranged in a stacked mode to guarantee that each circle is pressed, the mud scraping rings can be attached to the surface of the drill rod, and therefore the mud scraping disc is not prone to inclining and overturning compared with a split type U-shaped mud scraping disc, and the mud scraping effect is better.

The utility model belongs to the technical field of rock core sampling devices, and particularly relates to a rock core sampling sectioning device which comprises a driving vehicle, a fixing ring is fixedly connected to the middle end of the left side of the driving vehicle, evenly-distributed mounting feet are fixedly connected to the inner side of the fixing ring, and a first limiting frame is rotationally connected to the left sides of the mounting feet. Left and right opposite connecting rods are rotationally connected to the bottom end of the first limiting frame, a second limiting frame is rotationally connected to the bottom ends of the connecting rods, and a connecting plate is rotationally connected to the bottom end of the second limiting frame; according to the rock core sampling sectioning device provided by the utility model, the drill pipe is damped, so that the damage to a rock core, especially brittle rock, can be effectively reduced, and the integrity of a sample is ensured; meanwhile, damping is beneficial to improvement of segmentation precision, interference of vibration of a drill pipe on a rock core is reduced, and more accurate sampling is ensured; and the operation stability can be improved, clamping stagnation and fault risks are reduced, equipment abrasion is reduced, the service life is prolonged, and the maintenance cost is reduced.

The invention relates to the technical field of gravel geologic protection, and provides a gravel geologic body pore-forming wall-protecting construction device and a pore-forming method, which are used for supporting a pore wall by applying a wall-protecting structure to the pore wall in the punching process to avoid the problem that gravel on the pore wall falls off or causes pore collapse. According to the technical scheme, a supporting plate is rotationally connected to a drill rod, a supporting pipe is fixed to the side, opposite to a drill bit, of the supporting plate, the drill rod is sleeved with the supporting pipe, and the drill rod can rotate relative to the supporting pipe; the air bag sleeves the supporting tube and is located at the position, close to the supporting plate, of the supporting tube; the cylindrical net racks are connected end to end in the axial direction through the connecting pieces, the connecting pieces are provided with easy-to-fold marks, the cylindrical net racks are arranged on the supporting pipes in a sleeving mode, the cylindrical net rack located at the head can move and can be arranged on the air bag in a sleeving mode, and when the air bag is inflated, the cylindrical net racks can be opened and can be easily broken and separated from the fold marks; the hole wall is supported.

A rock porosity prediction method based on small-sample while-drilling data inversion is provided, including: collecting while-drilling parameters during laboratory or field drilling processes, including parameters such as torque M, propulsion F, rotational speed N, drilling speed V, drill pipe amplitude A, and vibration acceleration a; inputting the different types of multi-stage denoised while-drilling parameter data into a backpropagation regression-genetic algorithm (BP-GA) model for discrete point elimination, data augmentation, and iterative calculation to form a new while-drilling dataset; inputting the time-frequency domain feature graphs of while-drilling parameters for rocks with different porosities into a rock porosity convolutional neural network (VG-CNN) prediction model, obtaining an inversion model between the time-frequency domain features of while-drilling parameters and porosity through training and learning, ultimately achieving inversion prediction of rock porosity according to real-time field while-drilling parameters.

The invention relates to the technical field of tunnel engineering grouting, particularly provides an intelligent self-adaptive dual-mode cooperative grouting control system, a grouting method and application, and aims to solve the problems of non-uniform grout diffusion, blind area grout leakage and out-of-control grouting pressure of a traditional advanced curtain grouting technology under complex working conditions. The grouting method comprises the following steps that S1, a three-dimensional stratum model used for controlling the dual-mode collaborative grouting process is constructed, and initial grouting parameters are set; s2, on the basis of the initial grouting parameters in the step S1, advancing type segmented grouting is adopted, a three-dimensional stratum model monitors a real-time grouting result, and the grouting parameters are dynamically adjusted; s3, when the real-time grouting result in the step S2 is monitored to be abnormal, drill rod retreating compensation grouting is automatically conducted on a blind area in an abnormal section; and the step S2 is continued after the drill rod in the abnormal section retreats for compensation grouting repair until grouting is completed. In the whole grouting process, the grouting control system operates cooperatively. And the construction safety can be effectively guaranteed when grouting reinforcement projects under complex working conditions are applied.

The utility model relates to the technical field of detection and testing, and provides a pipe fitting torsion testing machine. The pipe fitting torsion testing machine comprises a base, a driven mechanism, a driving mechanism and a vertical loading mechanism, a groove is formed in the upper surface of the base, a sliding groove is further formed in the upper surface of the base, and the driven mechanism is connected into the groove. According to the pipe fitting torsion testing machine provided by the utility model, a torsion load loading system, an axial pressure load loading system and a transverse pressure load loading system are highly integrated, so that torsion, axial and bending three-axis composite loading can be realized on single equipment unprecedentedly; the real stress environment of pipe fittings such as geological drill rods under extreme working conditions is reproduced to the maximum extent, compared with a traditional single-axis or two-dimensional loading test, the test result can more accurately predict the actual service performance and failure mode of the pipe fittings, and the applicability is wider.