150 results about "Deep drilling" patented technology

A method and system for early prediction and warning of mine disasters through on-site monitoring is provided. [Solution] The method involves installing sensors at the mine site to monitor surface water, groundwater data and underground rock data in real time, so that mine safety management personnel can obtain timely and comprehensive data to better understand the state of the mine environment. The predictive analysis module uses deep drilling and computational learning technology to analyze the surface water, groundwater data and underground rock data to predict the risk assessment index Fpzs, which is helpful in predicting potential disaster risks, and comprehensively takes into account various factors such as the number of past disasters Lzs, the water level fluctuation coefficient Sbxs, and the rock stability coefficient Ywxs, which is helpful in quantifying the risk level, providing a more accurate disaster risk assessment, and reducing the casualties caused by mine disasters.

The invention relates to a preparation method and application of a composite leakage-proof agent while drilling, and belongs to the technical field of petroleum drilling engineering. The composite leakage-proof agent while drilling is prepared from the following components in percentage by mass: 20-45% of nano composite particles, 15-35% of a multi-stage fiber reinforced network material, 10-20% of an intelligent response blocking agent, 5-10% of a high-temperature-resistant additive, 1-5% of a dispersing agent and the balance of deionized water, wherein the sum of the contents of all the components is 100%. According to the composite leak-proof agent while drilling provided by the invention, the temperature-sensitive resin with a core-shell structure is introduced, so that a three-dimensional synergistic mechanism of nano-composite particle filling-multistage fiber network bridging-intelligent response curing is realized, and efficient and environment-friendly plugging of an ultrahigh-temperature and high-pressure stratum is realized. The success rate of one-time plugging is increased from 45% to 92%, the average operation time is shortened by 60%, and an efficient solution is provided for deep and ultra-deep drilling.

The invention relates to the technical field of PCB (Printed Circuit Board) processing, and discloses a method for removing lead warped copper by deep drilling in a gold finger gold plating process, which comprises the following steps of: optimizing the position and the shape of a gold-plated lead: changing the gold-plated lead from a short side of a gold finger to a side wall of the gold finger, and optimizing the shape of the gold-plated lead to be elliptical; the widest part R of the center of the ellipse satisfies Rlt by taking mil as a unit; x-R is larger than or equal to 4 mil, and X is the diameter of a deep drilling point; according to high-precision photosensitive wet film protection, before a gold-plated lead is removed through deep drilling, a photosensitive wet film is adopted to cover a gold finger lead area, the wet film is accurately positioned and printed through drilling positioning holes in the four corners, the protective area covers the gold finger lead and extends outwards by Y mil, and Y is larger than or equal to 4 mil. The method for removing the warped copper of the lead through deep drilling in the gold-plating process of the golden finger aims at solving the problem that the copper is prone to being warped when the gold-plated lead is removed through deep drilling in the gold-plating process of the golden finger.

The invention is suitable for the field of extra-deep and ultra-deep geotechnical engineering and petroleum engineering, and particularly relates to an extra-deep stratum parameter inversion and fracture prediction method based on Bayesian. By constructing a Bayesian inversion method combining a gradient lifting regression (GBR) machine learning model and a Markov chain Monte Carlo (MCMC) algorithm, deep rock mass mechanical parameter field distribution considering cross correlation among parameters is efficiently obtained, and accurate prediction of a well wall surrounding rock fracture area is achieved. Compared with the prior art, the method has the advantages of being high in prediction precision, wide in application range, high in calculation efficiency and the like, and reliable technical guarantee is provided for safe and efficient construction of ultra-deep drilling engineering.

An in-situ stress measurement device for ultra-deep non-vertical drilling adopts a technical route of single channel and bidirectional rolling of in-hole equipment, and its related functions are mainly realized by a bidirectional rolling device and a split-type axial-force-free circuit switching valve. The bidirectional rolling device can drive the in-hole equipment to move freely in a circumferential direction and back and forth, which changes sliding friction between the in-hole equipment and a hole wall into rolling friction during an in-situ stress measurement of non-vertical drilling. The split-type axial-force-free circuit switching valve provides a technical solution for a single-pipe test in the non-vertical drilling. The device greatly reduces wear of the in-hole equipment and the hole wall when the in-hole equipment is installed and withdrawn, can effectively protect markings of an impression measurement, and is suitable for high-efficiency in-situ stress measurement by a hydraulic fracturing method in the non-vertical ultra-deep drilling.

The invention discloses a gold mine prediction method based on deep ground drilling data, and relates to the field of mineral resource exploration. The problems that a traditional method depends on artificial experience, ignores a multi-source geological element space coupling relation and lacks three-dimensional probability expression, so that prediction precision is insufficient are solved. Carrying out weight distribution calculation on each key mineralization factor by adopting the coupling strength coefficient, and carrying out comprehensive processing on numerical values of the plurality of mineralization factors through a weighted fusion algorithm to obtain a comprehensive mineralization index distribution diagram layer; based on the numerical value distribution characteristics of the three-dimensional mineralization index field, establishing a mineralization probability prediction model by adopting a Bayesian network algorithm, and if the mineralization index of a certain spatial position is higher than a critical value, calculating a gold ore occurrence probability numerical value of the position; and converting the gold ore occurrence probability value into a probability distribution body under a space coordinate system through a three-dimensional modeling algorithm, and performing rendering processing on the probability distribution body by adopting a volume rendering technology to obtain a three-dimensional visual model of the gold ore occurrence probability.

The invention discloses a deep bittern exploration evaluation method, which comprises the following steps of: 1, constructing a multi-scale earth surface detection system and establishing a three-dimensional geologic model; 2, implementing deep drilling by adopting an optimal and fast drilling process, and synchronously carrying out well logging and well logging collaborative interpretation; the method comprises the following steps of 1, obtaining dynamic reservoir parameters through a single-hole multi-layer brine extraction test and a high-temperature and high-pressure in-situ test, 4, carrying out resource quantity intelligent estimation based on a three-dimensional geological modeling and machine learning algorithm, and 5, outputting a three-dimensional visual exploration decision scheme. According to the method, the electromagnetic-seismic joint inversion method is adopted, the constraint equation is established, the effective improvement of the longitudinal resolution of the stratum is achieved, the constructed multi-scale earth surface detection system can efficiently identify the reservoir at high precision, the precision reaches 0.5 m, the drilling efficiency is improved by adopting the optimal and fast drilling process, meanwhile, the accident rate is reduced, it is ensured that the conditions of the brine extraction (discharge) test are met, and the method is suitable for large-scale production. And the exploration technology and the actual effect of the deep liquid boron ore are practically improved.

The invention relates to the technical field of hard alloy materials, and discloses a hard alloy bearing for hard rock deep drilling and a preparation method thereof.The preparation method comprises the following preparation steps that tungsten carbide powder, aluminum powder, cobalt powder, nickel powder, iron powder, graphite powder and reinforcing filler are mixed and subjected to ball milling, and a mixture is obtained; the mixture is placed in a bearing mold to be pressed into a prefabricated blank; and the prefabricated blank is placed in a sintering furnace to be sintered and cooled to the room temperature, and the hard alloy bearing is obtained through aftertreatment, grinding and polishing. The reinforcing filler can be adsorbed to the surface of the alloy powder, so that the alloy powder is adhered to form a compact structure, and the reinforcing filler can improve the heat resistance of the hard alloy bearing, absorb and weaken stress generated by external force and enhance the compressive strength of the alloy bearing, and in addition, the reinforcing filler can supplement the carbon content in the alloy. And the situation that in the preparation process of the alloy bearing, extra carbon loss is caused due to the high oxygen content, and the mechanical performance of the alloy bearing is affected is avoided.

The utility model relates to the technical field of coal mining operation, in particular to a drilling rig for coal mining, which comprises a supporting ring, at least three first fixing seats arranged around the supporting ring, at least three second fixing seats arranged around the fixing ring, and limiting rods arranged between the second fixing seats and the first fixing seats. The pushing seat is arranged between the supporting ring and the first fixing seat, one end of the pushing seat is fixedly connected with a drilling barrel, and a spiral pushing piece used for drilling soil is arranged in the drilling barrel; the sampling barrel is arranged at one end of the drilling barrel, and a spiral feeding piece used for sending out mud blocks is arranged in the sampling barrel. During drilling, the spiral pushing piece can lift mud blocks in a drilled hole upwards, it is guaranteed that the drilled hole is smooth, the upwards-pushed mud blocks can enter the sampling barrel, the sampling barrel can send out the mud blocks in a centralized mode through the spiral feeding piece, workers can conveniently collect and sample the drilled mud blocks, and then deep drilling is conducted through a hydraulic drilling machine.

The invention discloses a soil sampling device for deep soil sampling, and relates to the technical field of soil sampling, the soil sampling device comprises a soil deep drilling mechanism, the soil deep drilling mechanism comprises a drill rod lifting assembly, a drill floor, a drill rod bearing and a hollow spiral drill rod, the drill floor is mounted on the drill rod lifting assembly, and the drill rod bearing is mounted on the drill rod lifting assembly; the soil sampling device comprises a drill floor, the middle of the drill floor is rotationally connected with the top of a hollow spiral drill rod through a drill rod bearing, the top of the hollow spiral drill rod is connected with a power assembly, and the soil sampling device further comprises an undisturbed soil sampling mechanism, a shading soil sampling mechanism and a shading soil containing mechanism. The influence of sundries such as stones in the upper layer of soil is avoided, the undisturbed soil sampling barrel can take an undisturbed soil sample in the deep position of the soil layer, the shading soil sampling mechanism and the shading soil containing mechanism are matched to complete relatively closed collection and sampling of the deep soil sample underground, and improvement of the collection accuracy of the deep soil sample is facilitated.

The invention relates to a double-shell high-thermal-conductivity phase-change heat storage microcapsule for an ultra-deep drilling fluid as well as a preparation method and application of the microcapsule, and belongs to the field of drilling fluid chemistry in the petroleum industry. According to the invention, two high-melting-point phase change materials and eutectic compounds of the two phase change materials are respectively used as core materials, the double-shell high-thermal-conductivity phase change heat storage microcapsule for the ultra-deep drilling fluid is prepared by coating an external shell layer twice, the material has a high phase change temperature, the phase change temperature is 173.3-230.7 DEG C, the phase change enthalpy is up to 211.4 J / g, and the phase change heat storage microcapsule can be used for the ultra-deep drilling fluid. When the material is in a phase change temperature range, a large amount of heat can be absorbed, the effect of phase change latent heat is achieved, and when the material is applied to drilling fluid, the temperature of the drilling fluid can be remarkably reduced, and the tolerance of the drilling fluid to high-temperature strata is improved.

The invention discloses a test platform for a deep sedimentary rock soil layer in an extreme environment and a building method. The test platform comprises a vacuum base, a hollow transparent cover, a vacuum top plate, a first temperature control assembly, a second temperature control assembly, a plurality of sample loading assemblies and a plurality of gas filling pipes, one end of the hollow transparent cover is fixed on the vacuum base, and the other end is fixed on the vacuum top plate to construct a vacuum environment; the first temperature control assembly is fixed to the top face of the vacuum base, the second temperature control assembly is fixed to the bottom face of the vacuum top plate, the multiple sample loading assemblies are sequentially stacked between the first temperature control assembly and the second temperature control assembly till the target height is reached, and each sample loading assembly is filled with a corresponding simulated rock-soil sample. Confining pressure is applied to the simulated rock-soil sample through the inflation pipe, so that the deposition state of a deep rock-soil layer on the surface of an extraterrestrial planet is truly simulated, a test platform is provided for a ground simulation drilling test, and the feasibility of a deep drilling technology is verified.

The full-automatic coal mine engineering driller comprises a vehicle-mounted chassis assembly, a hydraulic oil tank is installed on the left side of the surface of the vehicle-mounted chassis assembly, a mining computer is installed at the top of the hydraulic oil tank, and a main operation table is installed on the surface of the vehicle-mounted chassis assembly and located on one side of the hydraulic oil tank; an electric control box is mounted at the top of the main operation table; the hydraulic pump station is installed on the surface of the vehicle-mounted chassis assembly and located on one side of the main operation table. According to the full-automatic engineering driller for the coal mine, the whole device is arranged in a two-body crawler-type mode and is divided into a drill carriage and a pump truck, the full-automatic engineering driller can be suitable for narrow roadway construction of different coal mines, under the condition that manual intervention is not needed in the drilling period, work of whole machine walking, automatic rod ascending and descending, shackle and drilling is conducted through wireless remote control, and the working efficiency is greatly improved. Deep drilling can be achieved at a time, the number of underground field operators is reduced, the labor intensity is lowered, and the safety of field operation is improved.

The upward ultra-deep drilling crawling device for the underground complex environment of the coal mine comprises a body, and a high-definition camera is arranged at the front end of the body; a plurality of supporting leg assemblies are arranged on the side wall of the body, and each supporting leg assembly comprises at least two crawling supporting legs evenly distributed in the circumferential direction. One end of each crawling supporting leg is hinged to the side wall of the body, the other end of each crawling supporting leg is rotationally matched with a walking wheel, and the walking wheels are connected with a walking motor in a matched mode. The crawling supporting legs are connected with tight supporting assemblies. The invention further discloses a using method of the upward ultra-deep drilling crawling device for the underground complex environment of the coal mine. Through the arrangement of the overall structure, crawling along a drill hole and collection of a fracture development image in the drill hole are achieved, and the traditional mode that an industrial camera is pushed to detect a drill hole wall fracture through manual hole climbing and rod lifting is replaced; the problems that the labor intensity is high, the efficiency is low and the continuous detection requirement is difficult to meet in traditional manual hole climbing, rod lifting and industrial camera pushing detection are solved.

The present invention provides a true triaxial loading mechanism for simulating the dynamics of ultra-deep drilling cores, comprising a reaction loading frame, a first principal stress loading assembly, a second principal stress loading assembly and a third principal stress loading assembly, wherein a high-pressure fluid loading chamber extending along the third principal stress direction is constructed inside the reaction loading frame, and a core sample is arranged in the high-pressure fluid loading chamber, wherein the first principal stress loading assembly, the second principal stress loading assembly and the third principal stress loading assembly provide principal stress loading for the core sample in three principal stress directions, and the third principal stress loading assembly is integrated in the reaction loading frame, and the third principal stress loading assembly blocks the high-pressure fluid loading chamber, so that the high-pressure fluid loading chamber is formed into an ultra-high pressure chamber. The present invention can simulate the dynamic true triaxial loading conditions of ultra-deep drilling cores in deep geological environments during the true triaxial loading process of the core sample, so as to obtain stress-strain information of the dynamic disturbance full destruction process.

The present invention relates to a preparation method and application of a composite while-drilling leak-proof agent, and belongs to the field of oil drilling engineering technology. The composite while-drilling leak-proof agent is prepared from the following components in percentage by mass: 20-45% nano-composite particles, 15-35% multi-stage fiber-reinforced network materials, 10-20% intelligent response plugging agent, 5-10% high-temperature resistant additive, 1-5% dispersant, and the balance is deionized water, and the total content of each component is 100%. The composite while-drilling leak-proof agent provided by the present invention introduces a core-shell structured thermosensitive resin to realize a three-dimensional synergistic mechanism of "nano-composite particle filling-multi-stage fiber network bridging-intelligent response curing", thereby realizing efficient and environmentally friendly plugging of ultra-high temperature and high-pressure formations. The success rate of single plugging is increased from 45% to 92%, and the average operation time is shortened by 60%, providing an efficient solution for deep and ultra-deep drilling.

The application discloses a rock drilling and grouting equipment and method based on rock permeability, and particularly relates to the technical field of rock grouting, which comprises a drilling and grouting device, one end of the drilling and grouting device is provided with an auxiliary supporting device, the drilling and grouting device comprises a first cross frame, one end of the first cross frame is fixedly provided with a second cross frame, a first seat is vertically installed at the end of the first cross frame away from the second cross frame, and a second seat is vertically installed at the end of the second cross frame away from the first cross frame. The drilling and grouting device is arranged to automatically process deep drilling at the rock grouting position, and the grouting hole is immediately subjected to grouting operation. Meanwhile, the long drilling pipe slowly separates from the grouting hole during grouting, and the long drilling pipe always supports the grouting hole during the grouting operation, so that the collapse of the hole wall of some high-permeability rocks or the leakage of residues, which leads to the blockage of the hole or the early loss of the slurry, is prevented, and the effect and efficiency of the whole equipment on rock grouting are improved.

This invention relates to the field of drilling operation technology and discloses a stable deep-earth drilling system with strong pressure resistance. The system includes a support frame, a lifting frame slidably connected to the support frame, a top drive assembly mounted on the lifting frame, an intermediate docking assembly located at the bottom of the top drive assembly and connected sequentially, and a drilling assembly fixed to the bottom of the lowest intermediate docking assembly. The intermediate docking assembly includes a ring-shaped main body. This invention facilitates drilling operations and is suitable for drilling operations at different depths. During drilling, coolant is sprayed from the inner ring above the drill bit to quickly cool the drill bit, effectively protecting its safety and improving drilling efficiency and stability. It eliminates the need to remove the drill rod for core sampling, facilitating subsequent drilling operations. After core sampling, coolant flow is facilitated, preventing the core from clogging the backflowing coolant and effectively avoiding drill rod blockage in the borehole, thus improving drilling safety and facilitating drilling and core sampling operations.

The invention relates to a Mars frozen soil deep drilling coring vehicle and a coring method, the coring vehicle comprises a supercritical carbon dioxide preparation system, a high-pressure anchoring system, a drilling coring system and a transportation and storage system, and the coring process is divided into a preparation stage, an anchoring stage, a drilling coring stage, a barrel loading and recycling stage and a separation stage. The characteristics of high rock fracturing performance and high penetrability of supercritical carbon dioxide jet flow are utilized, deep drilling coring is assisted, and a plurality of conical anchoring pistons distributed in the circumferential direction are hydraulically pushed to be inserted into a soil body at the same time to achieve anchoring. A complete rock core transportation and storage mechanism is designed, the drilling coring system obtains the rock core, cuts off the rock core and places the rock core in a core storage bag, and under the synergistic effect of different types of guide rails and clamping jaws in the transportation and storage system, the rock core is stored in a core storage barrel and recycled in a centralized mode, and multi-point multi-time sampling can be achieved. According to the Mars frozen soil deep drilling coring vehicle and the coring method, stable anchoring and deep drilling of a Mars frozen soil stratum can be achieved, and the coring efficiency and quality can be remarkably improved.

The utility model relates to the technical field of traction equipment, in particular to a traction system for vertically arranging a deep drilling optical cable, which comprises a winch, a traction cable and a damping device, the traction rope is connected with the winch so as to be driven by the winch to retract and release. The damping device comprises a damping mechanism and a damping adjusting mechanism, the damping mechanism is connected with the traction cable and used for absorbing impact force of the traction cable, and the damping adjusting mechanism is connected with the damping mechanism and used for adjusting damping of the damping mechanism. According to the traction system for vertical arrangement of the deep-drilling optical cable provided by the utility model, the damping device is arranged, so that the damping mechanism of the damping device can be used for applying damping to the traction cable, and the situation that the traction cable is broken due to sudden acting force generated when the winch is started and stopped is prevented; traction cable fatigue and optical cable damage caused by uneven stress are effectively relieved, the damping adjusting mechanism can adjust damping of the damping mechanism according to requirements, and the flexibility of the system is remarkably improved.

The application discloses an unstable deep borehole while-drilling type ground stress testing device and testing method, which comprises a pressurized water injection device, a high-pressure drill rod in communication with the pressurized water injection device, a rope core drill rod sleeved outside the high-pressure drill rod, a channel switching valve comprising a valve body, a water inlet arranged on the valve body, a first water outlet channel in selective communication with the water inlet, and a second water outlet channel, wherein the other end of the high-pressure drill rod is in communication with the water inlet, one end of the rope core drill rod is fixedly connected with the valve body, and the other end is fixed to the ground during the test, and the testing device comprises, in sequence, an upper packer, a center fracturing section, and a lower packer, the first water outlet channel is in communication with the upper packer and the lower packer in sequence, and the second water outlet channel is in communication with the center fracturing section; and a geological drill bit is used to remove obstacles when passing through unstable strata. The application not only can prevent the backflow of sewage in the borehole into the channel switching valve and the inner cavity of the packer, but also can pass through the unstable deep borehole to perform stress testing.

The utility model discloses an orthopaedic drill bit with a locking structure, which comprises a connecting part, a drilling part is arranged on the connecting part, a plurality of groups of convex rings are uniformly arranged on the outer wall of the connecting part, and the convex rings and the connecting part are coaxially arranged; a locking sleeve is arranged on the outer wall of the connecting part, a plurality of groups of elastic locking plates are arranged on the locking sleeve, the locking sleeve sleeves the outer wall of the connecting part, so that the plurality of groups of elastic locking plates sleeve the outer wall of the connecting part, and the outer walls of the plurality of groups of elastic locking plates are sleeved with locking nuts; the locking structure has the advantages that when drilling is conducted, the maximum drilling depth can be visually seen by observing the position of the locking sleeve, too shallow or too deep drilling can be effectively avoided, normal operation is prevented from being affected, the locking structure can be conveniently detached, the locking structure can be conveniently installed and used on different orthopedic drill bits, and the locking structure is convenient to use and popularize. And the overall practicability is improved.

The utility model relates to the related technical field of wall surface drilling devices, in particular to a building wall surface drilling device with a waste residue collecting function, which comprises a hand support, a drilling mechanism is arranged on the inner side surface of a shell, a collecting mechanism is arranged on the inner side surface of the shell, and a limiting mechanism is arranged on the outer side surface of the shell. According to the wall surface drilling device with the waste residue collecting function for the building, through the arrangement of the collecting mechanism, when the wall surface drilling device is used, waste residues generated during drilling of a drill bit can be blocked by a filter screen and enter a second connecting sleeve, along with deep drilling, a wall surface extrudes a connecting frame, a spring can contract, and the connecting frame is flush with the wall surface all the time; when the drill bit is drilled, generated waste residues enter the first connecting sleeve to be temporarily stored, when the drill bit leaves the wall surface, the spring rebounds, the first connecting sleeve, the second connecting sleeve and the connecting frame are pushed back, the slag outlet is opened at the moment, the waste residues can fall into the collecting bag, the waste residues generated during drilling can be collected and do not fly, and secondary pollution is prevented.

The invention discloses a drilling fluid cooling and waste heat recovery system based on phase-change heat exchange, and belongs to the field of drilling engineering. The system comprises a drilling fluid circulation module, a heat exchanger module, a secondary refrigerant circulation and waste heat utilization module and an intelligent control module. The high-temperature drilling fluid is efficiently cooled through phase-change heat exchange of the low-boiling-point secondary refrigerant; meanwhile, the turbine generator is driven by vaporization of the secondary refrigerant, and waste heat recovery is achieved. The system supports intelligent series-parallel connection switching of multi-stage heat exchangers so as to adapt to different working condition requirements. The system has the advantages of high cooling efficiency, low energy consumption, high waste heat utilization rate and the like, and is suitable for high-temperature operation environments such as deep drilling and geothermal development.

The invention relates to the technical field of sand, in particular to a sand vegetation ecological restoration device which comprises a support, stabilizing mechanisms are fixedly connected to the bottoms of the four edges of the outer wall of the support, protection assemblies are fixedly connected to the outer sides of the multiple stabilizing mechanisms, and each stabilizing mechanism comprises a control assembly. The device comprises a plurality of control assemblies, the outer sides of the plurality of control assemblies are fixedly connected with stabilizing assemblies, the plurality of control assemblies comprise connecting shafts, the four edges of the outer sides of the plurality of connecting shafts are fixedly connected with connecting rods, and the inner sides of the plurality of groups of connecting rods are fixedly connected with control blocks. According to the device, the tree is effectively supported, the particularity of the sand environment is fully considered, the connecting stability of the device and the sand is greatly enhanced through deep drilling of the reinforcing assemblies and expansion and fixation of the reinforcing hooks, and meanwhile, the design of the protective cover reflects comprehensive consideration of environmental factors.

The invention belongs to the technical field of hard alloy materials, and particularly relates to a hard alloy for hard rock deep drilling and a preparation method thereof. The difficult problem of recycling high-quality hard alloy is solved, yttrium-containing fine-grained tungsten carbide and nickel-containing coarse-grained tungsten carbide are obtained through different treatment processes and are used together with other raw materials, the hard alloy for hard rock deep drilling is prepared, recycling of the waste hard alloy is achieved, and the utilization rate of the hard alloy is increased. And the fracture toughness of the hard alloy material is improved through modification treatment, and meanwhile good wear resistance is obtained.

The invention provides a hole bottom rock breaking device applied to extraterrestrial celestial body deep drilling. The hole bottom rock breaking device comprises an ultrasonic generator, a cable, an electric slip ring, an ultrasonic transducer, a free mass block, a spiral drill rod and a drill bit. The ultrasonic generator generates ultrasonic energy and provides the ultrasonic energy to the ultrasonic transducer; the ultrasonic transducer is used for converting an input ultrahigh-frequency electric signal into ultrahigh-frequency mechanical vibration; the free mass block excites the ultrahigh-frequency ultrasonic vibration generated by the ultrasonic transducer to drive downwards to generate high-frequency collision with the spiral drill rod, so that the spiral drill rod and the drill bit move downwards to impact the rock, and the free mass block performs reciprocating high-frequency collision between the ultrasonic transducer and the spiral drill rod through reverse movement of impact counterforce; the spiral drill rod is connected with the bottom of the ultrasonic transducer, and energy generated by ultrahigh-frequency vibration of the ultrasonic transducer and high-frequency impact of the free mass block is transmitted downwards to the drill bit. And the drill bit acts the high-frequency-ultrahigh-frequency impact energy on the rock, and the rock is broken through continuous impact.

A stepped deep hole drilling tool is proposed that improves the supply of coolant to the cutting edges and chip removal. Furthermore, the stepped deep hole drilling tool is economical to manufacture.

The utility model discloses an electric drill with an auxiliary handle, which relates to the technical field of electric hand drills and comprises an electric hand drill body. The auxiliary handle assembly is detachably arranged on the outer side of the electric hand drill body through friction force; the guiding auxiliary mechanism comprises an adjusting hole, a scale rod, a limiting shell, an avoiding channel, a hexagon nut and an adjusting bolt. The adjusting hole is formed in the extending handle in a penetrating mode, the scale rod is arranged on the inner side of the adjusting hole in a sliding mode, the limiting shell is fixedly arranged on the side face of the extending handle, the avoiding channel is formed in the right side of the limiting shell, and the hexagon nut is clamped to the inner side of the limiting shell and arranged on the outer side of the adjusting bolt in a sleeving mode. The adjusting bolt penetrates through the limiting shell and the side wall of the extending handle and extends to the inner side of the adjusting hole. According to the utility model, punching operation can be carried out by two hands, meanwhile, the situation that a drilled hole is too shallow or too deep can be avoided, and the actual use effect is better.

The invention discloses a PCB thickness measurement assembly and a use method, relates to the technical field of electronic manufacturing, and solves the problems that a board thickness measurement mode is often low in efficiency, and board thickness data of all positions of a product cannot be comprehensively and accurately obtained at a time, so that processing depth compensation is difficult to accurately carry out in subsequent processing, and the cost is low. Therefore, the stability of the back drilling depth is influenced, and the problem of deep drilling or shallow drilling possibly occurs. The PCB thickness measuring assembly comprises a rack lower shell, a rack upper shell is movably installed on the outer side of the top end of the rack lower shell, and a fixed base is fixedly installed at the position, close to the rear side, of the top end of the rack lower shell. According to the invention, each PCB is divided into one hundred points for board thickness measurement, so that the board thickness measurement precision of different positions of the surface of each PCB is ensured, personal errors are reduced, the problems of over-drilling or under-drilling and the like can be effectively avoided during subsequent back drilling, and the stability of the back drilling depth is improved.