109 results about "Deep drilling" patented technology

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.

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 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 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 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 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.

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.

This invention discloses a soft robot system and its working method for sampling polar ice layers, applied in the field of polar drilling technology. It includes a soft robot and an ice surface working platform. The soft robot comprises a sub-ice drilling soft body and an ice surface sealing soft body. The sub-ice drilling soft body includes a soft body main unit and a heat-fusion module located at the front end of the soft body main unit. The ice surface sealing soft body includes a soft body main unit. Both soft body main unit one and soft body main unit two are provided with hollow channels, and several air chambers are provided inside soft body main unit one on both sides of the hollow channels. The ice surface working platform includes a pneumatic system, a pipeline system, a water storage system, and a main controller. The main controller is electrically connected to the pneumatic system, the pneumatic system pipelines are connected to the pipeline system, and the pipeline system pipelines are connected to the water storage system and the air chambers. The pipeline system passes through the hollow channels and connects soft body main unit one and soft body main unit two in series. This invention meets the existing requirements of unmanned drilling, flexible selection of sampling locations, no complex mechanical structure, and low propulsion resistance in ultra-deep drilling.

The present application provides a detection device and a detection method for the CO2 storage amount in a water-based drilling fluid. The detection device for the CO2 storage amount in the water-based drilling fluid includes a reaction kettle, which is set as a sealed structure and is filled with the water-based drilling fluid; a pressurizing mechanism, the outlet of which is communicated with the reaction kettle to inject pressurized carbon dioxide into the water-based drilling fluid; and a detection device, which can detect the change amount of the carbon dioxide in the reaction kettle, and this change amount is the CO2 storage amount of the water-based drilling fluid. In the present application, the reaction kettle filled with the water-based drilling fluid is connected to the pressurizing mechanism, so that the water-based drilling fluid in the reaction kettle can be in the environment at the deep drilling depth. Carbon dioxide is injected into the water-based drilling fluid through the pressurizing mechanism to determine the amount of carbon dioxide that the water-based drilling fluid can absorb, thereby being able to quantitatively measure the CO2 storage amount of the water-based drilling fluid.

The utility model relates to the technical field of drilling fluid conductivity detection, in particular to a drilling fluid conductivity detection device which comprises a main body, the top of the main body is fixedly connected with a control assembly, and a movable detection assembly is arranged in the main body; according to the utility model, the sliding plate can slide in the sliding chute by utilizing the telescopic jacking of the telescopic rod, so that the position of the detection mechanism at the bottom of the sliding plate can be accurately adjusted, and the wire wheel driven by the motor can adjust the extension length of a cable, so that the detector can be brought into deeper drilling fluid, the detection range is enlarged, and the detection efficiency is improved. By means of the band-pass filter, the phenomenon that signal transmission is blocked due to the fact that the outside interferes and shields signals when the detector transmits the detected signals can be avoided, the band-pass filter can eliminate out-of-band noise and direct-current components, useful information is extracted from noise signals through discrete wavelet transform or continuous wavelet transform, the signal-to-noise ratio is increased, and the error rate is reduced.

The invention relates to the technical field of shaft machining, and discloses an industrial lifting door transmission reel machining all-in-one machine which comprises a workbench, a drilling assembly and a tapping assembly, and the drilling assembly and the tapping assembly are matched with each other. Through mutual cooperation of the blocking sleeve and the bristles, when the blocking sleeve and the bristles enter a drill hole together, the blocking sleeve can effectively restrain the bristles, the situation that chippings are pushed to the top of the drill hole due to excessive scattering of the bristles in the insertion process is avoided, and the hidden danger of chipping accumulation is reduced from the source; the bristles rotate at a high speed under the action of the friction wheel and the friction plate, the bristles originally bent in the blocking sleeve are unfolded and tightly attached to the inner wall of a drill hole by means of centrifugal force and elasticity, 360-degree dead-corner-free cleaning is achieved, and even tiny chippings in the deep position of the drill hole can be thoroughly removed. By means of the design, the problem that chippings remain in a traditional cleaning mode is solved, hole wall scratching possibly caused by manual cleaning is avoided, and the machining defects such as tapping clamping stagnation and insufficient thread precision caused by the chippings are reduced.

The utility model relates to the field of well drills, in particular to a well drilling device capable of automatically adjusting depth, which comprises a bottom support. The device comprises a bottom support and further comprises a limiting seat, a rotating ring, meshing teeth, a sponge ring, a supporting plate, a second driving motor and a gear, two symmetrical mounting seats are arranged on the surface of the rear side of the bottom support, wheels are rotationally connected to the outer sides of the two mounting seats, two symmetrical supporting assemblies are arranged on the upper surface of the bottom support, and a transmission module is connected to the moving end of each driving assembly. The output end of the transmission module is connected with a drill bit; by arranging a second driving motor, the output end of the second driving motor can drive a gear to rotate during operation, the gear can drive a rotating ring to synchronously rotate on the upper surface of a limiting seat under the cooperation with meshing teeth during rotation, and the rotating ring can drive a sponge ring to rotate during rotation, so that in the process of moving a drill bit upwards and taking out the drill bit, the drill bit can be conveniently taken out. The outer surface of the drill bit can be cleaned, and sludge attached to the outer surface of the drill bit is reduced.

This invention relates to a pile foundation positioning and anti-deviation structure for pile foundation engineering, belonging to the field of pile foundation positioning technology. It includes a base, with mounting columns symmetrically connected to the four corners of the base. A support seat is connected to a fixed seat above each mounting column. The outer protrusion of the mounting column is fixed to the fixed seat. A support seat is installed above the fixed seat, and a platform is installed above the support seat. A movable sleeve is installed at the central opening of the platform's internal cavity. Through the cooperation of the platform, the spherical movable sleeve, and the guide tube, gravity is used to adaptively keep the guide tube vertical, allowing for rapid adaptation to uneven ground. Simultaneously, an oil adjustment and fixing component is included. The oil is pushed according to the pile column diameter to adjust the meshing position of the transmission gear, adapting and adjusting the transmission speed of the gear, thereby adjusting the drilling depth of the screw groove column. A larger diameter results in deeper drilling, further improving the pile foundation positioning accuracy.

The invention relates to an experimental device and method for researching rock crushing characteristics. The experimental device comprises an experimental kettle, a base for mounting the experimental kettle and a crusher mounted on the base. The experiment kettle comprises a kettle body and a kettle cover arranged on the kettle body, and the kettle body and the kettle cover jointly define a closed cavity used for containing a rock sample. A drill rod extending into the experiment kettle is arranged on the crusher, and a drill bit propped against the rock sample is mounted at the end part of the drill rod. Wherein the kettle body is configured to enable the temperature and the pressure in the cavity to reach preset values respectively before the drill bit crushes the rock sample. Therefore, the experimental research on the rock crushing characteristic can be ensured to be carried out under the preset temperature and pressure conditions, so that the obtained experimental data is more practical, and reliable support is provided for the research on deep and ultra-deep drilling rock crushing technologies and tools.

A hammer drill is provided including at least one cylinder, in which at least one piston is mounted such that it can be moved axially between an upper and a lower end position, wherein the cylinder has at least one lower fluid supply, which can be cyclically supplied with a drive fluid, wherein the cylinder is closed with an upper cover and a lower cover, wherein, in the lower end position, the piston is in contact with an inner side of the lower cover and a ring gap is formed between the entire casing surface of the piston and the inner wall of the cylinder. A method for deep drilling using a hammer drill of this type is also provided.

The application discloses a kind of high ground stress test methods of deep-buried tunnel surrounding rock.It includes the following steps, step one: after drilling is completed, installation connection and lowering of each instrument equipment in high ground stress test device based on ultra-deep drilling are completed;Step two: pressure equipment is pressurized, high-strength liquid pressure is formed, high-strength liquid pressure reaches hole bottom piston through flexible high-strength pressure pipe, pressure gauge and built-in flexible high-strength pressure pipe;Step three: with the pressure input of pressure equipment, flexible cladding plate on both sides of piston is pressed and moves laterally, and is well cladded with drilling hole wall and gradually applies pressure to drilling hole wall;Step four: the compression deformation of drilling hole wall rock mass after being pressed is measured by micrometer;Step five: P~s characteristic curve is obtained;Step six: ground stress of drilling hole wall rock mass test point is obtained.The application has the advantages of being able to measure and determine ground stress before deep-buried underground chamber or tunnel excavation construction.

The invention provides an intelligent-detection tunnel karst cave roof stability evaluation method and system, and the method comprises the steps: exploring the geological state of a tunnel karst cave roof through deep drilling, carrying out the distance measurement through a surface leveling laser range finder, receiving a signal reflected by the surface of a natural object, carrying out the distance measurement, and constructing a three-dimensional solid model of a tunnel karst cave; performing 3D analysis processing, filtering and interpretation on the original point cloud data of the karst cave, and establishing a numerical analysis model of the karst cave based on a finite element simulation program; according to the actual tunnel external load and the serialized virtual tunnel external load, tunnel karst cave roof mechanical calculation and finite element simulation calculation analysis are carried out, and karst cave roof stability analysis sequence data are generated; and according to the mechanical calculation sequence data of the tunnel karst cave roof, statistically analyzing the maximum principal stress data of the tunnel karst cave roof, and judging whether the stability of the karst cave roof meets the maximum load requirement outside the tunnel.

The present application relates to a kind of based on extended Kalman filter prediction deep drilling overflow state perception method, belong to drilling well control technical field, including based on bond graph principle establishes the state space model of drilling wellbore and formation coupling flow system;Real-time data of logging parameters such as pressure before and after overflow occurs, inlet and outlet flow, mud pit increment are used to establish the observation equation model of the state space model of drilling wellbore and formation coupling flow system;The state equation model of the state space model of drilling wellbore and formation coupling flow system is established using pore medium seepage theory and oil and gas well fluid mechanics principle;Formation pressure and wellbore and formation coupling flow state are predicted in real time by introducing extended Kalman filter prediction method.The present application can reduce the false positive rate of system while discovering downhole overflow in advance, effectively reduce the risk of well kick when drilling abnormal high pressure formation, avoid blowout accident, provide safety guarantee for subsequent drilling operation.

Deep drilling tool with 2 cutting edges, consisting of: a drill head (10) made of hard metal or ceramic, with a roof-shaped (10 a) or conical (10 b) end geometry, with two main cutting edges (10 c) offset from one another by 180° on the front, with at least two inner channels (10 d) for the coolant supply to these and two free spaces (10 e) for the removal of the chips, a round drill pipe with a conical opening (12) and an intermediate carrier (11) which directs the coolant, which primarily flows back from the two free spaces (10 e) on the drill head (10) and is mixed with chips, through two channels (11 b) into the interior of the pipe (12), and divides the coolant flow supplied on the outside of the drill pipe (12) into direct supply to the cutting area via outer channels (10 f), and indirect supply to the inner channels (10 d), all connected by means of gluing, soldering or welding.

The invention relates to a screw-setting guide sleeve for cervical cone fracture repair, which comprises a screw-setting guide sleeve body, a drill screw is inserted in the screw-setting guide sleeve body, and the outer wall of the screw-setting guide sleeve body is fixedly connected with a first auxiliary handle; according to the screw placement guide sleeve, multi-stage limiting structures such as the fixed depth-limiting drill sleeve body, the limiting column, the adjusting sleeve and the limiting base are integrated on the screw placement guide sleeve body, accurate control over the drilling depth is effectively achieved, an operator can flexibly set the drilling stroke by rotating the adjusting sleeve according to the anatomical characteristics of the cone of the neck 1 of a patient, and the operation is convenient. According to the invention, through cooperation with physical locking of the limiting column and the limiting base, dual safety limiting is formed, and the situation that the medulla oblongata and surrounding tissue are damaged due to too deep drilling is further prevented. Compared with a traditional mode depending on hand feeling control, over-drilling and hole deviation risks caused by insufficient operation experience or external force interference can be remarkably reduced; and the accuracy and the stability of screw implantation are improved.