316 results about "Drill cuttings" patented technology

The invention discloses a drilling, deslagging, charging and blocking integrated device, which belongs to the technical field of tunnel engineering and open-air engineering blasting equipment, and comprises a mobile vehicle body, a multi-link structure, a drilling and deslagging device, an explosive filling device and a stemming blocking device. The drilling and deslagging device is used for drilling and discharging drilling cuttings; and the explosive filling device independent track is arranged above the drilling machine beam track in parallel and is used for accurately conveying detonators and emulsion explosives into holes. After drilling is completed, the explosive filling device moves downwards in parallel to be aligned with the hole site for charging; after charging, the device moves upwards to drive the stemming plugging device to reach an orifice, and drilling cuttings discharged by drilling are directly used as stemming raw materials for automatic compaction and plugging. The problems that in the traditional blasting construction process, equipment is frequently switched, the manual operation efficiency is low, high-risk link manual operation needs to be conducted, and stemming raw materials need to be prepared independently are solved, automatic continuous operation of the whole process of drilling, charging and plugging is achieved, and the construction efficiency and intrinsic safety are remarkably improved.

The invention discloses an early warning processing method, device and equipment for mine micro-seismic monitoring and a medium, and relates to the technical field of mine safety engineering.The method comprises the steps that when mine micro-seismic early warning is triggered, whether a rock burst risk exists in a current mine area or not is predicted, and a current prediction result is obtained; if the current prediction result represents that the rock burst risk exists, a target dangerous area in the current mine area is recognized, and danger relieving measures and monitoring-recovery operation are executed on the target dangerous area; if the rock burst risk does not exist, whether the drilling cutting data of the current mine area is larger than a first drilling cutting amount threshold value or not is judged, and a drilling cutting data judgment result is obtained; if the drilling cutting data judgment result is that the drilling cutting data is greater than or equal to the first drilling cutting amount threshold value, judging that the rock burst risk exists in the current mine area, and skipping to execute the step of identifying a target dangerous area in the current mine area; and if the drilling cutting data is smaller than the first drilling cutting amount threshold value, production limiting-monitoring-recovery operation is executed. And an accurate pre-warning post-processing flow is realized.

The invention discloses a metal material high-precision cutting system, which belongs to the technical field of metal processing, and comprises a platform body provided with a carrying guide rail and a cutting guide rail, the carrying guide rail is provided with a jig assembly, and the cutting guide rail is provided with a double-shaft walking mechanism of which the end part is provided with an actuator; a pecking drill cutting assembly integrated with an air blade chip removal assembly is arranged on the side face of the actuator. By arranging the pecking drilling cutting assembly, the voice coil motor drives the saw blade to achieve high-frequency micro-amplitude reciprocating motion, pecking drilling type cutting is formed, cutting resistance and thermal stress are effectively reduced, and casting microcracks and saw blade tooth breakage are avoided; a monitoring piston can provide buffering and vibration reduction, resistance is fed back in real time through an air pressure sensor so as to dynamically adjust a double-shaft walking mechanism, a protective cover and an air blade chip removal assembly cooperate, a front nozzle removes surface impurities and cuttings in a kerf, a rear nozzle conducts sweeping and cleaning, and it is ensured that the kerf is clean and effectively cooled.

A method for hydrocarbon production from a carbonate formation includes receiving a carbonate texture description of a drill cutting. A pre-defined grain fraction is assigned to the drill cutting based on the texture description. The pre-defined grain fraction is one of a set of pre-defined grain fractions and each pre-defined grain fraction of the set of pre-defined grain fractions corresponds to a respective one the set of carbonate texture descriptions. Based on the pre-defined grain fraction assigned to the drill cutting and a depth of the wellbore from which the drill cutting is taken, an estimated porosity of the drill cutting is determined using an algebraic equation, coefficients for which are determined by regression analysis using reference rock samples that have been assigned pre-defined grain fractions from the same set of pre-defined grain fractions.

The invention relates to the technical field of oil content measurement, in particular to a method for measuring the oil content of oil-based drilling cuttings and application of the method. The method comprises the following steps: querying a dynamic extraction curve database according to sample lithology and a processing method, and determining an optimal extraction time point by calculating a concentration change rate; multi-point sampling is carried out in the extraction process, the environment temperature and pressure are measured at the same time, an environment influence model comprising a temperature influence sub-model and a pressure influence sub-model is established, and an environment correction factor is obtained; performing infrared spectrum measurement on the extract sample, performing data correction, and calculating an average value and a standard deviation to remove an abnormal value; and finally, calculating the final oil content by adopting a piecewise linear equation aiming at different concentration ranges. By considering the lithologic characteristics, the environmental influence and the segmented linear relation, the measurement precision and reliability are remarkably improved.

The utility model discloses a dedusting deslagging blowout prevention system buffer device which comprises a box body, a high negative pressure pipeline connector, a low negative pressure pipeline connector and a box body spraying device are arranged on the left side and the right side of the top of the box body respectively, the high negative pressure pipeline connector and the low negative pressure pipeline connector are connected to a high negative pressure pipe and a low negative pressure pipe respectively, and a deslagging drainage port is formed in the left side of the box body. A dust removal device negative pressure pumping opening, an orifice slag discharging and conveying opening and a sewage high-pressure water switching opening are sequentially formed in the right side of the anti-spraying hole dust remover from top to bottom and are respectively connected to a dust discharging pipe of the anti-spraying hole dust remover, a slag discharging pipe of the drilling machine and a high-pressure water pipe; the anti-spraying hole dust remover is connected to a dust collecting pipe connected with the drilling machine. Drilling cuttings generated in the drilling construction process, compressed air used for deslagging and gas enter the buffer box in a unified mode, centralized treatment is carried out, and the problems that in the drilling process, dust prevention and control are difficult, gas fluctuates, an extraction pipeline is blocked by accumulated slag and the like are solved.

The invention belongs to the technical field of excitation detection, and provides a movable seismic source system carried by a deep mine heading machine and a positioning excitation detection method, which are characterized in that the excitation time delay of each seismic source unit in an array is accurately controlled by utilizing a controllable seismic source, so that the seismic source units form synchronous superposition in a specific direction, and the detection of an active source is realized; in the aspect of passive source detection, vibration generated when the jumbolter cuts surrounding rock is used as a vibration source, a pilot sensor installed near an anchor rod drill is used for recording an original vibration signal, namely cutting vibration, when the jumbolter works, and signals collected when the jumbolter works and signals collected by the pilot sensor are subjected to cross-correlation processing, so that the original vibration signal is obtained. And reconstructing a virtual seismic source, and then carrying out data processing and passive source imaging. And the active source detection result and the passive source detection result are combined to interpret the unfavorable geologic body, so that the detection of the position is realized, and the geological interpretation of the whole space of the mine can be realized.

The invention discloses an air distribution and slag guide device for reverse circulation down-the-hole hammer drilling. The air distribution and slag guide device comprises an outer pipe, a slag guide pipe, an air distribution power mechanism, a drill bit and a drilling cutting conveying mechanism. The outer pipe is provided with an air inlet. The slag guide pipe is coaxially arranged in the outer pipe, and an annular gas distribution channel is formed between the slag guide pipe and the outer pipe and communicated with the gas inlet. And the bottom of the slag guide pipe is provided with a slag suction port, and a slag guide channel is formed in the slag guide pipe. The air distribution power mechanism comprises an air supply machine and an air distribution piston, and the piston slides in the annular air distribution channel in a reciprocating mode. The drill bit is connected with the outer pipe and used for crushing rock strata, and an inner shell and the flow guide cover form an annular cavity. The flow guide cover is provided with a gas distribution nozzle, and the spraying direction corresponds to the slag suction opening. And the drilling cutting conveying mechanism is arranged in the slag guide channel, axially extends and is used for conveying the drilling cuttings to the earth surface. The invention aims to solve the problem that rock debris is easy to retain in a slag guide channel in the existing reverse circulation drilling technology.

The invention relates to a method (50) comprising the steps of: - using a sensor to acquire (110) an image of the sample composed of grains; - applying (120), to the image (1), a convolutional neural network in order to obtain a contour map (C) associating, with each pixel of the image, a value equal to one unit when that pixel belongs to a contour of a grain and otherwise equal to zero; - applying (130), to the contour map (C), a segmentation algorithm in order to obtain a segmented image (S) comprising a plurality of regions, one region being separated from a neighbouring region by a contour having a thickness of a single pixel; and - applying (140), to the segmented image (S), one or more geometric processing operations in order to calculate physical quantities for each grain so as to characterise the lithology of the sample (3).

The invention belongs to the technical field of robots, and discloses an intelligent drilling cutting method monitoring robot and a rock burst danger early warning method. The robot collects motor parameter information in real time in the drilling cutting implementation process, a motor drill jamming and suction prediction model is established, drill jamming and suction risks are predicted through comprehensive decision, misjudgment caused by stratum changes or sensor noise is prevented, meanwhile, the drill carriage performance detection function is achieved, the drill carriage performance is evaluated according to parameters, and the drilling efficiency is improved. The working state and maintenance suggestions of the current drill carriage are given; according to the method, a self-developed intelligent drilling cutting method monitoring robot is adopted. Based on a drilling cutting method principle and a powder drilling rate index, fitting is carried out on the drill rod thrust and the drill rod torque through the pulverized coal amount, and critical indexes of the drill rod thrust and the drill rod torque are determined. Full-automatic drilling and collecting in the drilling cutting method construction process are achieved, rock burst dangerousness is monitored according to multiple parameter indexes, reliability is high, and the response speed is high.

An automatic drilling machine for brake pad steel backing includes a drilling device, a base, a position adjustment device, a steel backing support device, and a material conveying device. The drilling device includes a central shaft, a support frame, a moving frame, a guide cylinder, and a linkage mechanism. The support frame is moved by the position adjustment device. The central shaft is slidably and rotatably mounted on the support frame, and a drill bit is fixedly mounted at the front end of the central shaft. The moving frame is slidably and rotatably mounted on the support frame, and a plurality of flip plates are rotatably and elastically mounted at the front end of the moving frame. A cleaning brush is fixedly mounted on the inner side of the flip plate, and a guide groove connecting the inner and outer sides is provided. The guide cylinder is slidably and elastically mounted on the support frame through a guide cylinder mounting frame, and an inlet communicating with a coolant pipe is provided on the guide cylinder, and a guide groove is fixedly mounted thereon. A cutting blade mounting ring is rotatably mounted inside the guide cylinder, and a plurality of cutting blades are fixedly mounted on the cutting blade mounting ring. This invention can effectively guide the flow direction of the coolant and cut long drill chips into small segments during drilling.

In a hand-held power tool, in particular a drill, comprising a housing (110) and at least one drive motor arranged in the housing (110) for driving an output shaft (140), which has a tool holder (142) for an insert tool, wherein the output shaft (140) has a tubular transport section (144) for transporting away dust and / or drilling particles occurring during machining, and wherein, in its end region (299) close to the drive motor (120), the tubular transport section (144) is formed for discharging dust and / or drilling particles away from the output shaft (140). The output shaft (140) has, in the end region (299) of the tubular transport section (144) in a circumferential direction (202), a first plurality of recesses (213) and a second plurality of recesses (214) for discharging the dust and / or drilling particles away from the tubular transport section (144), and the first and second plurality of recesses (213, 214) are spaced apart from one another in the longitudinal direction (201) of the output shaft (140).

The invention provides a kind of pile foundation construction platform.The pile foundation construction platform includes soil layer;Platform main body, the inside of the soil layer is embedded the casing, and the surface of the soil layer pours the concrete layer, the surface of the concrete layer is equipped with a plurality of circular table shape the groove;Cleaning mechanism;The top end of the fixed cylinder is installed for driving the fixed shaft rotation motor, the side wall of the fixed shaft is installed for excluding sewage turbine, for pushing sewage to rise the fan blade, for crushing drill cuttings the crushing rod and for preventing drill cuttings accumulation the rotating plate;Adjusting mechanism, the support net and the side wall of the fixed cylinder are slidingly connected cylindrical scraper;Reinforcing mechanism, the reinforcing mechanism is rotatably connected the second fixed plate;Driving mechanism;Enclosure mechanism.The pile foundation construction platform provided by the present application has the advantages of effectively preventing pipeline blockage, quickly discharging mud, increasing the stability of soil layer around the borehole.

Systems, methods, and apparatus for producing wellbore fluids using drill cuttings, geopolymers, and / or mine tailings, and compositions relating to the same are disclosed. The drill cuttings, geopolymers, and / or mine tailings may be used to create appropriate wellbore fluids to be used in wellbore fluid supply systems, such as spacer fluids, lead barrier fluids, tail barrier fluids. In one embodiment, the wellbore fluids result in one or more substantially impermeable barrier sheaths within the wellbore, which barrier sheaths may be cementitious or non-cementitious.

The present application relates to geotechnical engineering technical field, specifically to a kind of slope stabilizing mechanism and its construction technology, wherein, the slope stabilizing mechanism includes moving assembly, moving assembly includes expansion part and drive structure.Expansion part has the contraction state along the radial contraction of anchor rod and the expansion state along the radial expansion of anchor rod.Drive structure drives expansion part to move on anchor rod axially, and control expansion part switches between contraction state and expansion state.When expansion part is in expansion state and moves along anchor rod axially, the hole wall of drilling can be continuously wiped, the low-intensity, low-permeability mud skin structure formed on the surface of drilling hole wall due to drilling construction is broken, the loose drill cuttings and collapse on the surface of hole wall are removed, so that the surface roughness of drilling hole wall is improved, and then the interfacial bond strength between drilling hole wall and grouting body is enhanced, to avoid mud skin, drill cuttings and other impurities to hinder the effective combination of grouting body and hole wall.

Systems, methods, and apparatus for producing coated drill cuttings and for producing wellbore fluids using coated drill cuttings, and compositions relating to the same are disclosed. The coated drill cuttings may be used to create appropriate wellbore fluids to be used in wellbore fluid supply systems, such as spacer fluids, lead barrier fluids, tail barrier fluids. In one embodiment, the wellbore fluids result in one or more substantially impermeable barrier sheaths within the wellbore, which barrier sheaths may be cementitious or non-cementitious.

The utility model relates to the technical field of drilling equipment, and discloses an oil field drilling fluid impurity filter which comprises a rotating rod and a drill bit, the outer wall of the bottom end of the rotating rod is in threaded connection with a plurality of first bolts, the outer wall of the top end of the rotating rod is connected with a liquid drainage pipe through a liquid drainage set so that the rotating rod can drain liquid, and the inner wall of the drill bit is fixedly connected with an inner shell plate. The inner wall of the top end of the inner shell plate is connected with a rotating rod through a moving set so as to block stone entering from the drill bit, the outer walls of the upper end and the lower end of the rotating rod are rotationally connected with connecting rings, and the outer walls of the connecting rings are connected with blocking plates through protection sets so that the blocking plates can be opened outwards. According to the sand scraping device, the effects that too large drilling cuttings are prevented from entering the filter screen through opening and closing of the blocking plate, the filter screen is prevented from being damaged by the drilling cuttings are achieved, and the effect that the sand scraping rod cleans the small drilling cuttings blocked in the filter screen through the transmission rod is achieved.

A method for evaluating a multiphase fluid includes adding the multiphase fluid to an annular volume of a test apparatus, the test apparatus including an inner cylinder deployed in an outer cylinder thereby defining the annular volume. The inner and outer cylinders are configured to rotate independently with respect to one another. The method further includes rotating at least one of the inner and outer cylinders after adding the multiphase fluid to the annular volume to simulate desired flow conditions in the annular volume. The method still further includes removing the multiphase fluid from the annular volume after rotating and evaluating at least one physical property of the removed multiphase fluid.

The utility model discloses a prevent drilling machine drill chip splashing device, including drilling machine, drill, drilling machine platform, platform clamp, shield and steel finished product sample, and the one end of drill is connected with drilling machine, and drilling machine platform is installed on drilling machine, and platform clamp sets up in drilling machine platform, and shield sets up on the upper surface of drilling machine platform, and is equipped with a drill hole on the top of shield, and shield is composed of first cover body and second cover body, and steel finished product sample is fixed in shield through platform clamp, and the other end of drill passes through drill hole and contacts with steel finished product sample surface downward. First cover body is composed of shield top plate and four peripheral edge boards, and the upper end of four peripheral edge boards is connected with the lower end of shield top plate, and one end of shield top plate is equipped with semicircular through -hole, and second cover body is set up reversely same with first cover body, and first cover body and second cover body are combined and form shield. Prevent drill chip splashing, can effectively collect drill chip, ensure that operating personnel and environmental safety, can observe the situation in shield simultaneously.

The invention discloses a double-pipe drilling double-power drilling machine system, which belongs to the technical field of drilling rods, and comprises an outer drilling rod, a spiral inner drilling rod is rotatably arranged in the outer drilling rod, the outer drilling rod is in threaded connection with a pipe drill bit, a PDC drill bit is arranged at one end, far away from the outer drilling rod, of the pipe drill bit, and a plurality of liquid holes are formed in the PDC drill bit; a composite slice drill bit is arranged on the periphery of the end, away from the outer drill rod, of the pipe drill bit, and a deslagging channel is formed between the composite slice drill bit and the PDC drill bit. And a central channel communicated with the liquid hole is formed in the central position of the spiral inner drill rod. According to the double-pipe drilling and double-power drilling machine system, scour and damage of drilling cuttings to a drilling hole wall are fundamentally eradicated, the drilling cuttings carrying efficiency of a medium is greatly improved through the spiral stirring and vortex effect generated by reverse rotation of the inner drill pipe and the outer drill pipe, the stubborn problem that a slag discharging channel is blocked is effectively solved, and the service life of the drilling cuttings is prolonged. And continuous and efficient operation under complex and deep hole working conditions is ensured.

A cuttings collection system includes a drill bit at the end of a toolstring, a stabilizer connected to the drill bit, a cuttings catcher arranged around the stabilizer with apertures having a size less than an average size of cuttings generated by the drill bit and retractability, and sensors installed in a body of the stabilizer. A cuttings catcher includes a housing with recesses and a retractable mesh installed in each of the recesses. A method of operating an at-bit cuttings catcher system includes providing a toolstring with a drill bit, a stabilizer, a cuttings catcher, and a measurement-while-drilling tool, where the cuttings catcher includes a housing with recesses and a mesh installed in the recesses, drilling a formation using the drill bit, producing cuttings of the formation, extending the mesh from the housing of the cuttings catcher, catching cuttings in the cuttings catcher, and analyzing the cuttings using sensors.

The application provides a kind of ore grade distribution real-time detection method, system and equipment, it is related to mining technical field, method mainly includes: based on the operation map of mining area, centralized control center determines blast design hole coordinate;Automatic drill travels to a hole position and is in position;Automatic drill carries out drilling operation, obtains drill cuttings and records operation parameters in real time;Automatic detection platform is sampled to drill cuttings by sample collection device continuously by continuous flow;Through drying, tabletting, analysis processing, ore grade content and internal profile structure diagram, and match corresponding hole data;Based on ore grade content, internal profile structure diagram and hole data, single-hole model characteristic curve is obtained by fusion;The above operation is carried out to all hole positions;The average value of the single-hole model characteristic curve of adjacent hole positions is calculated, and curve fitting is carried out to obtain the ore grade spatial distribution imaging map.The scheme can provide intuitive guidance for ore dressing of mine, and can greatly improve the mining efficiency and quality.

The application provides an oil-containing drilling cuttings reinjection fluid and a preparation method and application thereof, which contains, based on the total weight of water in the base fluid being 100%, 0.2-0.3wt% of a suspending agent, 0.15-0.25wt% of a low-viscosity polyanionic cellulose, 0-0.25wt% of sodium carboxymethyl cellulose, 0-0.2wt% of hectorite, 0-0.2wt% of a zwitterionic polymer, 20-25wt% of oil-containing drilling cuttings and the balance of the base fluid; in the oil-containing drilling cuttings reinjection fluid, the contents of the three components of sodium carboxymethyl cellulose, hectorite and the zwitterionic polymer are not simultaneously 0, and the total content of the treating agent is less than 1wt%. The application realizes the target of reducing the total amount of the treating agent through the complementary advantages of the performance of different treating agents, and on the basis of making the rheological performance, the suspension stability and the filtration loss performance of the oil-containing drilling cuttings reinjection fluid system meet the requirements, the high-temperature resistance and the pollution resistance of the oil-containing drilling cuttings reinjection fluid system are also improved.

This invention provides a real-time monitoring and early warning system and method for surrounding rock stress during drilling, belonging to the field of coal mine safety monitoring technology. The system includes an information acquisition module, a drilling information processing module, a video processing module, a microseismic information processing module, and a comprehensive information processing and early warning module. Through pressure sensors, displacement sensors, cameras, and microseismic sensors, it collects feed pressure, rotation pressure, cylinder displacement, drill cuttings images, and microseismic signals in real time. It performs filtering, noise reduction, and feature extraction on various types of data. A weighted average algorithm is used to fuse multi-source data to construct a fused dataset. A surrounding rock stress monitoring model is built based on an LSTM deep recurrent neural network to achieve real-time analysis and hazard level classification and early warning of surrounding rock stress. This invention realizes multi-source information fusion monitoring of surrounding rock stress state during drilling, effectively identifying strong, medium, and weak stress hazards, and improving the safety and reliability of drilling operations and early warning.

This invention discloses a rapid drilling device and method for the floor of coal mine roadways. It includes a drilling rig, drill rods, and a drill bit. The drill rods consist of a transition drill rod and a circular drill rod. A water channel is provided through the transition drill rod, the circular drill rod, and the drill bit at a certain thickness. A water extraction pipe is provided inside the transition drill rod and the circular drill rod. A water extraction pipe and a water supply pipe are sleeved through the center of the drill arm. The drill arm's water extraction pipe communicates with the drill rod's water extraction pipe and the drill bit's inner cavity. The drilling rig's water supply pipe communicates with the drill rod's water channel. During drilling, water injected from the water supply pipe enters the bottom of the hole through the water channel. The water at the bottom of the hole, carrying drill cuttings, is extracted sequentially through the hollow drill bit, the drill rod's water extraction pipe, and the drill arm's water extraction pipe under external negative pressure. This allows drilling mud to be continuously extracted from the center of the drill rod during drilling, eliminating the need for special drill bit removal and cuttings disposal, shortening the drilling progress, greatly improving drilling efficiency, ensuring the floor pressure relief effect, and providing technical support for safe production on site.

The invention relates to the technical field of oil and gas reservoir well completion, in particular to a gas storage sand production control method and device. The method comprises the following steps: in a gas storage well completion process, replacing drilling cuttings carried during backflushing by using a dissolvable sand consolidation liquid medicine, and plugging an annulus by using a sleeve and annulus plugging technology; and under the conditions that the gas storage is in a gas storage operation state and the operation pressure of the gas storage reaches a packer under-pressure operation pressure threshold value, the gas storage is controlled to perform well opening and gas discharging, and an oil pipe gas layer is sealed through the packer to achieve a layered injection and production operation system. By the adoption of the scheme, the sand production prevention and control facility of the gas storage can be completed during well completion.

The application discloses a preparation method of a diamond tool bit, and the hot-pressing die of the diamond tool bit is aimed at a drill cutting tool bit and a sharp corner tool bit, the upper pressing head and the lower pressing head are respectively divided into two parts, so that the structure of the die pressing head group is simpler, and the manufacturing cost is lower; and the hot-pressing pressure can be provided according to the shrinkage ratio during hot-pressing sintering, and the use is more flexible; the top of the drilling end surface of the prepared diamond tool bit is formed into a triangular sharp top cutting edge, excellent self-sharpening and sharpness of the tool bit are maintained, wear resistance is high, and the service life is long; the size and shape error of the formed diamond tool bit are small, the precision is high, and the quality is good; the diamond drill bit can quickly cut into the drilled material, the drilling speed of the tool bit is improved, the drilling sharpness is improved, and the cutting stability and safety are ensured.

The utility model provides a negative pressure dust removal device for an underground coal mine gas extraction drilling construction orifice, which belongs to the technical field of coal mine dust removal and is characterized in that when the negative pressure dust removal device for the underground coal mine gas extraction drilling construction orifice is adopted, a drill rod outlet of an orifice blowout prevention hole box is embedded into a coal body and is in sealed connection with the coal body; a drilling rod penetrates through the drilling rod inlet and the drilling rod outlet to drill into a coal body for drilling, negative pressure is provided through the extraction pipeline, dust, drilling slag and water at a drilling hole opening are introduced into the hole opening anti-spraying hole box, part of the dust, the drilling slag and the water are deposited at the bottom of the hole opening anti-spraying hole box, a large amount of drilling slag is prevented from being sprayed out, and hole opening anti-spraying is achieved. Dust, drilling slag and water mixed gas treated by the orifice blowout prevention hole box enters the gas-slag separator, is subjected to primary filtering separation through the first filter screen, then enters the auxiliary dust removal tee joint and is subjected to secondary filtering separation through the second filter screen, most of dust at the orifice of a drilled hole can be removed, the sight of operators is guaranteed, and the working environment is improved.

The present application provides a kind of inner slag discharging device and its slag discharging method, it includes high wear-resistant obturator, drill bit drill rod device, venturi water and drill slag dry-wet separator, the drill bit drill rod device is located in high wear-resistant obturator, drill slag dry-wet separator is connected with drill bit drill rod device by venturi water.The flow direction of drill slag can be changed by changing the running direction of slag discharging medium, so as to reduce the scouring, soaking and friction of slag discharging medium and drill slag on the hole wall, which is beneficial to the formation of drilling hole;It can achieve the purpose of point coring by achieving "falling and discharging simultaneously";Drilling cuttings can be well collected, which is beneficial to the civilized production of construction site and prevents dirtiness and disorder;If inert gas is used for slag discharging during construction, it can also achieve the purpose of inhibiting spontaneous combustion of coal seam.Through the above technical scheme analysis, the device is theoretically feasible and the operation is reliable, which provides good drilling quality for casing, greatly improves the success rate of drilling and casing and the extraction effect.