93results about How to "Increase adoption rate" patented technology

The invention relates to a single-action double-pipe coring overburden drill tool for an air down-the-hole hammer. The single-action double-pipe coring overburden drill tool comprises a central coring drill tool and an overburden drill tool. The central coring drill tool is a single-action double-pipe coring drill tool and comprises a single-action vibration reduction mechanism, an inner pipe adjusting mechanism and a coring mechanism with a bayonet device; the single-action vibration reduction mechanism comprises an impact connector, a disc spring, a bearing block, a connecting shaft, a thrust ball bearing and a radial ball bearing; the inner pipe adjusting mechanism comprises a connecting shaft, a core pipe connector, an inner pipe and a nut; the coring mechanism with the bayonet device comprises an outer pipe, an inner pipe, a connecting shaft, a core pipe connector, a coring drill bit, a rolling needle, a pawl spring seat and a pawl spring; the overburden drill tool comprises a casing, a casing connector, a casing shoe, a clamp ring and a casing drill bit. The single-action double-pipe coring overburden drill tool for the air down-the-hole hammer is applicable to relevant fields such as geological mineral exploration and engineering geological survey for complex formation with loose sand, cobbles, gravel, fracture, breakage and the like.

The invention relates to a lifting-free borehole bottom rope freezing coring drilling tool and method. The lifting-free borehole bottom rope freezing coring drilling tool comprises a salvaging device, an inner pipe assembly and an outer pipe assembly. According to the coring method, liquid nitrogen is fed into a liquid nitrogen chamber of the salvaging device; the salvaging device is fed into an outer pipe once the roundtrip is ended; the salvaging device is connected with the inner pipe assembly so as to feed the liquid nitrogen into a freezing chamber; and the liquid nitrogen absorbs heat and is gasified so as to freeze the hydrate rock core. By adopting the lifting-free borehole bottom rope freezing coring drilling tool and method, the liquid nitrogen can be prevented from being gasified due to heat dissipation and vibration during drilling, so that the freezing efficiency of the liquid nitrogen can be improved. According to the lifting-free borehole bottom rope freezing coring drilling tool and the coring method, a small drill bit is arranged on the inner pipe assembly and is driven by a large drill bit to drill together, so as to obtain the rock core with required dimension; a drill column does not needed to be integrally lifted from the borehole, so that the lifting-free continuous drilling and coring can be realized; and the small drill bit and a clamp spring seat are disassembled during sampling, a half-closing pipe is drawn out of a rock core pipe together with the rock core, and a rock core sample is stored in a liquid nitrogen storage tank or a high-pressure container.

The invention discloses a hydraulic control natural gas hydrate hole bottom frozen rope core drill and a coring method, which are particularly suitable for drilling and coring of natural gas hydrates of deep sea and permafrost lands. The hydraulic control natural gas hydrate hole bottom frozen rope core drill uses dry ice as a cold source, uses ethyl alcohol as cooling catalyst and secondary refrigerant, and can achieve rapid freezing of natural gas hydrate rock cores. The hydraulic control natural gas hydrate hole bottom frozen rope core drill achieves to rapidly core without lifting a drill by combining rope coring and hole bottom freezing. The hydraulic control natural gas hydrate hole bottom frozen rope core drill drives a control valve machine to achieve the process that the cold source is injected into a refrigeration mechanism by adopting drilling fluid column pressure, and has high feasibility. An inner pipe assembly does not rotate when drilling, prevents hydrate rock cores from being damaged because of mechanical force which is produced by a drill in a large extent, thereby more effectively improving recovery rate of rock cores, integrity and representative, and can rapidly obtain the rock cores on the ground by adopting a split core barrel mode to rapidly sample on the ground.

The invention discloses a pneumatic circulation freezing type natural gas hydrate wire-line coring drilling tool and a coring method. The drilling tool is composed of an inner pipe assembly and an outer pipe assembly. Dry ice is adopted by the drilling tool to serve as a cold source, ethyl alcohol serves as a secondary refrigerant, high-pressure carbon dioxide generated when the dry ice is mixed with the ethyl alcohol is used for pushing the ethyl alcohol to flow circularly, the freezing energy is transmitted to a freezing cavity continuously from a cold storage cavity where the dry ice is located, and quick core freezing is achieved; a hole bottom freezing method and a wire-line coring process are combined, quick coring can be achieved without lifting the drilling tool, an inner pipe does not rotate in the drilling process, and mechanical disturbance of aquo-complex cores is reduced. The pneumatic circulation freezing type natural gas hydrate wire-line coring drilling tool is reasonable in structure, high in freezing efficiency and simple in operation process.

The invention discloses a casing coring drill applied to a core drilling project in geological exploration, and a casing coring drilling method. The casing coring drill is a hole bottom drilling device for carrying out coring drilling without lifting the drill to replace a drilling bit, and is mainly composed of an inner pipe drill capable of feeding and fishing and an outer pipe drill connected with a casing. The casing coring drilling method is characterized by comprising the following main process flows: replacing an inner hole drill stem with the casing; drilling for coring; fishing with a core; inspecting or replacing the drilling bit; feeding a coring drill; and lifting an inner pipe drill so as to finish the casing drilling operation. The casing coring drilling method disclosed by the invention adopts the casing instead of the drill stem to transfer drilling loads. The coring drilling without lifting the drill to replace the drilling bit is carried out by the casing coring drill, and running casing along with the drill is achieved; drilling is quickly and effectively achieved, and reaches the expected hole depth as a complex formation or the casing is isolated. Thus, the technical problems including but not limited to coring drilling of the complex formation are solved.

The invention discloses a double-wall closed soil sampling method and device for soft soil. The method comprises the steps that A, double-layer sampling pipes are connected to soil sampler connectors and fixed through pins; B, a double-wall closed soil sampler is placed down into the bottom of a hole and pressed into soil for sampling; C, in the soil sampler pressing-in process, a lifting rod moves downwards along with the soil sampler; D, after the soil sampler is pressed to reach the depth, the soil sampler is pulled out upwards after the sampling pipes are closed; E, after the soil sampler is lifted to the ground, whether the sampling pipes deform or not is detected; F, soil samples are conveyed to a laboratory, closed and kept upright after being sampled out. According to the double-wall closed soil sampling method and device for soft soil, the inner and outer layer sampling pipes are connected with the sampler connectors through the pins, the inner layer sampling pipe is formed by splicing five identical rectangular steel plates along long edges in a contact mode, and a soil breaking piece is located at the lower end of each steel plate and connected with the inner layer sampling pipe through a hinge. The method is easy to implement, operation is easy and convenient, the structure is simple, stability and reliability are achieved, the soil sampling quality is high, and the sampling rate is improved.

The invention relates to an ice valve type pressure-maintaining and heat-preservation sampler, which comprises a drilling or sampling switch mechanism, a refrigerating fluid circulating system, a corebarrel lifting and positioning mechanism, an upper mechanical sealing mechanism, an ice valve forming mechanism, a corebarrel single-acting mechanism and a channel I-VIII which are connected. Pressure maintaining is realized by an ice valve formed below a corebarrel through mechanical sealing and refrigerating fluid circulation. Heat preservation is realized by coating porous foam, heat-preservation paint and a reflecting film on the outer wall of an inner circulation pipe. By adopting the invention, the problem that a mechanical valve is difficult to start, and is easily blocked by sundries in holes is solved, the reliability and the success ratio of pressure maintaining are improved, and a smaller radial dimension is beneficial to obtaining a larger-diameter core and improving the extraction rate of a hydrate core. Through tests, the ice valve realizes 25MPa sealing and is suitable for drilling a hydrate with a hole liquid column of 2500 m. When in pressure-maintaining sampling, a downhole reciprocating pump is started to drive the refrigerating fluid to circulate, and ice jamming is generated in an inner cavity at the lower end of the inner circulation pipe to form the ice valve so as to realize sealing pressure maintaining.

The invention discloses a coring drilling tool based on hydraulic clamping coring. The coring drilling tool comprises a force transferring power distribution mechanism, a guide limiting mechanism, a pressure storage mechanism, a lifting pressure injection mechanism, a hydraulic core clamping mechanism, a side spraying drill bit power distribution mechanism, an outer tube assembly and a sealing system, wherein the guide limiting mechanism is butted with the force transferring power distribution mechanism; the pressure storage mechanism is butted with the guide limiting mechanism; the lifting pressure injection mechanism is butted with the pressure storage mechanism; the hydraulic core clamping mechanism is butted with the lifting pressure injection mechanism; the side spraying drill bit power distribution mechanism is butted with the hydraulic core clamping mechanism; the hydraulic core clamping mechanism comprises a bottom bearing platform, a hydraulic membrane, a core inner tube, a clamp spring seat and a clamp spring. The coring drilling tool can reach 100 percent coring rate in soft, loose and broken complex stratums where coring is difficult, provides fully automatic three-dimensional stress to clamp, bind and control cores based on hydraulic pressure, meanwhile is matched with a conventional core clamping and cutting device, and has the characteristics of high reliability, high coring efficiency, high coring quality, high core recovery percentage, wide applicable stratum range and good automation property.

The invention relates to a liquid nitrogen hole bottom frozen rope core drilling tool and a core-drilling method. The tool mainly comprises a fisher, an inner pipe assembly and an outer pipe assembly. Due to a liquid nitrogen cavity formed in the fisher, liquid nitrogen used for a frozen core is stored in the liquid nitrogen cavity, when roundtrip is ended, the fisher is thrown, the liquid nitrogen is injected into a freezing cavity through connection between the fisher and the inner pipe assembly, the heat is absorbed through liquid nitrogen gasification, and a hydrate core is frozen. The liquid nitrogen is arranged in the fisher, and compared with the method for storing the liquid nitrogen in the inner pipe assembly, the method has the advantages that the liquid nitrogen is prevented from being gasified due to vibration, heat dissipation and other reasons in the drilling process, and the liquid nitrogen freezing efficiency is improved, so that the core fidelity is improved. A clamp spring seat is detached during earth surface sampling, a semi-closing pipe and the core are withdrawn from a core pipe, and a core sample is preserved in a liquid nitrogen storage tank or a high-pressure container.

The invention provides a rope salvaging type hydraulic compulsory coring driller. The driller comprises an outer pipe assembly and an inner pipe assembly. A spring card blocking head, a spring card chamber, an outer pipe, a reamer, a righting ring and a coring drilling head are up-down successively assembled in the outer pipe assembly, so an up-down through cavity is formed. The inner pipe assembly is arranged in the outer pipe assembly cavity. A salvaging spearhead assembly, a spring card positioning mechanism, an in-place informing mechanism, a compulsory coring differential mechanism, a core blocking alarming mechanism, a single action mechanism, an inner pipe and a core converging jaw assembly. The driller is characterized in that a ball throwing assembly and a differential assembly are arranged on the compulsory coring differential mechanism; the compulsory coring differential mechanism achieves blocking of an overcurrent channel of drilling fluid of a lower part driller in a wayof throwing a steel ball in the inner pipe; and through the hydraulic force, pressure in increased so the lower part driller generates differential displacement, and the core converging jaw assembly to bear force to carry out inwards converge, thereby finishing compulsory coring processes. According to the invention, objectives of improving recovery factor and drilling-in coring efficiency duringdrilling-in coring in loosed and damaged complex stratums are achieved.

The invention discloses a literature information common mode-based recommendation method, and aims at recommending interested scientific and technical literatures for users. The method specifically comprises the following steps of: obtaining a keyword mode of each literature by utilizing a clustering mechanism-based mode identification algorithm according to keyword information of the literatures; and recommending other literatures with a common mode to a user on the basis of the literature currently accessed by the user through the keyword mode of the literature. The method is a literature keyword common mode-based recommendation method; and according to the method, interested literatures can be recommended to users without the history behavior data of the users, so that the diversity of the recommendation results is improved.

The invention discloses an information processing method and apparatus. The method comprises the steps of performing image acquisition on a first food material to obtain a first image, wherein the first food material is a food material purchased by a user; processing the first image to obtain food material identifier information corresponding to the first food material; obtaining demand information input by the user; and querying a preset cookbook database according to the demand information and the food material identifier information to obtain a corresponding cookbook. Therefore, the user does not need to manually input food material names one by one to query the cookbook, the user operation is simplified, and the intelligent level is higher; and the cookbook is purposefully recommended to the user in combination with user demands, so that the adoption rate of the user to the cookbook is increased.

The invention discloses a cluster node load balancing method and device, and a computer storage medium, which are used for solving the technical problems of poor real-time performance of resource optimization scheduling in a cluster, unbalanced resource utilization of each node and the like. According to the method, the periodically running load balancing task is configured in the Kubernetes cluster; the method comprises the following steps: preliminarily determining a Pod to be expelled on a node based on a pre-configured load balancing strategy in three aspects of comprehensively consideringa single copy, node balancing and condition re-adaptation; screening out to-be-expelled Pod meeting a scheduling condition according to a Pod expelling rule; and finally, calling a Pod scheduler to schedule the to-be-expelled Pod determined to be expelled to an optimal node. According to the method, the resource utilization of each node of the cluster is more balanced, the utilization rate of cluster resources is improved, the optimal operation environment of the Pod is continuously ensured, the occurrence frequency of resource recovery operations such as Pod expelling is reduced, and the stability of the cluster is maintained.

The invention discloses a double-acting double-pipe single-bit coring drilling tool and an application method thereof, and belongs to the field of geological exploration boring machines. The double-acting double-pipe single-bit coring drilling tool comprises an inner-outer core barrel connector, an outer pipe, an inner pipe and a drill bit body arranged at one end of the inner pipe. The outer pipe and the inner pipe are fixed to the inner-outer core barrel connector. An annular gap is reserved between the outer pipe and the inner pipe. A water dividing hole is formed in the inner-outer core barrel connector. Four to eight flange ribs are uniformly distributed on the outer side face of the drill bit body and each provided with a step. The steps of the flange ribs are sleeved with the end of the outer pipe. A row of hard alloy drill bits is embedded in the bottom face of the drill bit body, and a row of hard alloy drill bits are embedded in the bottom faces of the flange ribs. The coaxiality and the integral rigidity of the drilling tool are improved by means of the flange rib type drill bits, and vibration of the drilling tool during drilling is reduced; in addition, the rock core sampling quality and efficiency of quaternary loose strata, bed rock weathering zones and coal seam outcrops are remarkably improved; and meanwhile, the drilling efficiency is improved.

The invention discloses a single-tube drill for improving a loose washable stratum recovery factor. The single-tube drill is composed of a pressure stabilizing flow splitting device, a core barrel, a water distribution device and a step drill. The water distribution device is located in the core barrel. The pressure stabilizing flow splitting device is installed at the upper end of the core barrel. The step drill is installed at the lower end of the core barrel. The single-tube drill is applicable to core drilling and coring of a loose washable stratum such as kaolin with large viscosity, high plasticity and hydrophilic expansion, due to the combination of the devices, the phenomenon that washing fluid perpendicularly washes a core can be avoided on the condition of ensuring smooth powder discharge at the bottom of a hole, meanwhile, the flow speed of the washing fluid on the periphery of the core inside a core tube is decreased, and the washing effect of the washing fluid on the core is lowered, so that the drilled core integrity is improved, and the core recovery factor is improved.

The invention discloses an automobile torsion beam suspension frame. The automobile torsion beam suspension frame comprises a suspension frame transverse beam and two suspension frame longitudinal beams respectively connected with the two ends of the suspension frame transverse beam respectively, and further comprises a stabilizing cross rod located between the two suspension frame longitudinal beams, and the stabilizing cross rod is rotationally connected with the suspension frame transverse beam and the suspension frame longitudinal beams. According to the automobile torsion beam suspension frame, the stabilizing cross rod is added, when an automobile swerves or passes through an uneven road, the large stress concentration is produced at the welding position of the suspension frame transverse beam and the suspension frame longitudinal beams due to torsion, the stabilizing cross rod can bear part of torque, and therefore the stress at the lap joints of the suspension frame transverse beam and the suspension frame longitudinal beams is reduced, and the cracking risk at the lap joints is reduced. The stabilizing cross rod of the automobile torsion beam suspension frame can be replaced, stabilizing cross rods with different torsion rigidities are replaced to a torsion beam assembly, the skew rigidity of the whole torsion beam suspension frame can be adjusted, the operating performance and the following rate of a back suspension frame are improved, cost is saved, and installing and maintaining are convenient.

The invention discloses a natural gas hydrate hole-bottom refrigerating liquid moving rope coring drill tool and a coring method and is suitable for natural gas hydrate drilling and coring of permanent frozen layers in deep sea and on land. Pure freeze-sampling is adopted, dry ice and alcohol are adopted as a cold source and freezing-assistant catalyst and secondary refrigerant, so that quick freezing of natural gas hydrate rock core can be realized; rope coring is combined with hole-bottom freezing, so that quick coring without drill lifting is realized; pressure of drilling liquid is adopted to drive a control valve mechanism to inject the cold source into a freezing mechanism, so that feasibility is high. An inner pipe assembly does not rotate back during drilling, so that damage to the hydrate rock core caused by mechanical force generated when the drill tool rotates back is avoided greatly, and coring efficiency is improved effectively.

The invention is suitable for the technical field of computer, and provides a recommendation method and device. The method comprises the following steps of: receiving history recommendation preference data; obtaining an extreme point of a recommendation target; generating a corresponding current population; calculating a target function value of the current population; selecting a preset quantity of individuals from the current population according to the target function value to group a parent population; carrying out an evolution operation on the parent population; generating a child population; when the current evolution algebra does not exceed a preset evolution algebra threshold value, combining the parent population and the child population to generate a next generation of evolution population; setting the next generation of evolution population as the current population; adding 1 to the current evolution algebra; calculating the target function value of the current population again; repeating the steps until the current evolution algebra achieves an evolution algebra threshold value; and setting the parent population as a recommendation result so as to realize correct, novel and comprehensive personalized recommendation and then improve the recommendation adoption rate.

The invention provides a local reverse circulation coring drill tool for loose and broken strata. The local reverse circulation coring drill tool comprises a joint, an outer pipe, a negative suction element, a transition element, a rock core pipe joint, a transition communicating element, an inner pipe, a reamer, an elastic clamp and a drill bit. The upper end of the negative suction element is connected with the lower end of the joint and the outer pipe while the lower end of the negative suction element is connected with the transition element through a supporting ring, the transition element is connected with the inner pipe through the rock core pipe joint, the elastic clamp is disposed in the inner pipe, the inner pipe is situated on an inner-wall step of the drill bit and connected with the drill bit through the reamer, and the transition communicating element is arranged in a manner of penetrating the supporting ring, the transition element and the rock core pipe joint. A structure similar to a gear pump is adopted to form negative pressure to generate local reverse circulation of drilling liquid, so that scouring of a hole wall by the drilling liquid in the process of full-hole reverse circulation is avoided, a rock core is facilitated to enter a rock core pipe, and rock core recovery rate can be improved effectively in the process of drilling; the local reverse circulation coring drill tool is suitable for being used for drilling in strata which are loose, broken and prone to corrosion and erosion.

The invention discloses a spiral rotating shaft type local reverse circulation core drill bit. The spiral rotating shaft type local reverse circulation core drill bit at least comprises a connector, a transition element, a communication element, an inner pipe and an outer pipe. The upper end of the connector is connected with a drill rod. The middle section of the connector is connected with the outer pipe. The lower end of the connector is connected with the transition element. The hollow transition element is internally provided with the communication element. The outer portion of the lower end of the communication element is connected with the inner pipe through an inner pipe connector. The inner pipe is arranged in the outer pipe in a sleeved mode. The outer pipe is connected with a reamer and a core drill head. The spiral rotating shaft type local reverse circulation core drill bit further comprises a spiral rotating shaft. The spiral rotating shaft is installed in the hollow communication element after being supported through a pair of conical roller bearings and two bearing bases. Meanwhile, the upper end of the spiral rotating shaft is connected into the connector, the interior of the lower end of the communication element leads to the inner pipe after being in threaded connection with a one-way part base, a large thrust bearing is arranged between the transition element and the communication element, a small thrust bearing is arranged between the transition element and the spiral rotating shaft, and the 'two-pipe single-rotating' effect in the drilling process of the drill bit is achieved. According to the spiral rotating shaft type local reverse circulation core drill bit, the spiral blade and two-pipe single-rotating reverse circulation working principles are combined, and the collecting rate of drill cores is effectively improved.

The invention discloses a hydraulic rock core lifting device for exploratory boring. The device comprises a waterproof transfer mechanism, a diversion limiting mechanism, a pressure storage mechanism, an elevation injection molding mechanism, a hydraulic core clamping mechanism, a lateral jet drill bit transfer mechanism and a sealing system, wherein the diversion limiting mechanism is butted with the waterproof transfer mechanism; the pressure storage mechanism is butted with the diversion limiting mechanism; the elevation injection molding mechanism is butted with the pressure storage mechanism; the hydraulic core clamping mechanism is butted with the elevation injection molding mechanism; the lateral jet drill bit transfer mechanism is butted with the hydraulic core clamping mechanism. The device can be directly matched with a double-tube drilling tool and a rope core drill to achieve a coring rate of 100 percent for a complicated difficult-to-core formation such as a soft and loose formation and a broken formation; in addition, a rock core can be fully automatically lifted, bundled and controlled under three-dimensional stress on the basis of hydraulic pressure; moreover, a conventional core clamping and cutting device is matched to achieve the characteristics of high reliability, high coring efficiency, high coring quality, high rock core collection rate, wide applicable formation range, high automation performance and the like.

The invention relates to an improvement of an engineering geological prospecting tool, in particular to a Luoyang shovel. The Luoyang shovel comprises a shovel knife and a weighting rod, wherein the shovel knife is cylindrical, the lower part thereof is a soil taking cylinder, and the upper part thereof is an impact cylinder; the diameter of the impact cylinder is greater than the diameter of the soil taking cylinder; an impact cylinder step is formed in the connected place of the impact cylinder and the soil taking cylinder; a shovel knife top cover is fixed at the top of the impact cylinder, and is provided with a shovel knife top cover center hole; an impact plate is arranged in the impact cylinder; a spring is arranged between the impact plate and the shovel knife top cover; the diameter of the impact plate is greater than the diameter of the soil taking cylinder and smaller than the diameter of the impact cylinder; the weighting rod penetrates through the shovel knife top cover center hole to be fixed with the impact plate; and a shovel knife bottom edge is arranged at the bottom of the soil taking cylinder. The Luoyang shovel is simple in structure, convenient for operation, low in labor intensity of operators, high in production efficiency, little in soil sample disturbance and high in soil sample extraction rate, is not liable to damage a connecting screw thread, and prolongs the service life of the Luoyang shovel.

The invention discloses a book management and control service platform, which comprises a data module, a module C and a module B, wherein the data module is used for storing book information; the template C is used for obtaining user input information, and calling the data module to obtain user book information corresponding to the user input information; and the module B is used for processing user book information, adding the user book information to a target database and outputting the target database. The platform is at least provided with two use modes which are respectively the purchasing recommendation of a user and teaching material itinerant exhibition, the purchasing recommendation of the user is an innovative mode of the purchasing recommendation and is required by the market and accords with the will of the people. Firstly, the platform is used for purchasing recommendation to have the advantages of lowest cost, most complete variety, latest product, unlimited people number, flexibility in time and ordinary state book selection.

The invention relates to a hydraulic shearing type sampling drilling tool which comprises an outer sampling pipe assembly and an inner sampling pipe assembly arranged in the outer sampling pipe assembly, wherein the outer sampling pipe assembly comprises an upper joint, an upper centering device, an outer pipe joint, an outer sampling pipe, a lower centering device and a drill bit which are sequentially arranged from top to bottom; and the inner sampling pipe assembly comprises a suspending system, a guiding system and a press sampling pipe assembly, the guiding system and the press sampling pipe assembly are positioned below the suspending system, and the press sampling pipe assembly can slide up and down in a sealing manner along the inner wall of an outer sampling pipe (30) and the guiding system. The hydraulic shearing type sampling drilling tool provided by the invention has capabilities of effectively solving the sampling problem under conditions of broken grounds such as sea and land water areas and the like and greatly improving quality of samples and increasing sampling efficiency.

The invention discloses a broken and soft coal seam closed coring drill bit suitable for ground drilling. The coring drill bit comprises an outer drill bit body, an inner drill bit body and a drill bit body; the drill bit body is provided with a three-step hole with the hole diameter sequentially increased from front to back, the outer drill bit body is fixedly arranged on the outer ring wall of the front end of the drill bit body, the outer drill bit body is provided with a plurality of cutting wings, a flow guide groove is formed between two adjacent cutting wings, the inner drill bit body is detachably installed on a small-diameter hole section of the three-step hole, a water hole communicating with the flow guide groove is formed in a first-stage step face between a large-diameter holesection and a larger-diameter hole section of the three-step hole, an annular groove is formed in the larger-diameter hole section of the three-step hole, and the annular groove is used for installing a sealing ring. According to the broken and soft coal seam closed coring drill bit, scouring by drilling fluid to broken coal cores is avoided, the denudation effect by the drill bit wall on the coal cores in the drilling process is reduced, the inner drill bit body enters a coal seam earlier than the outer drill bit body, the mining rate for coal seam closed coring can be increased, and the success rate of coal seam gas content measurement for ground drilling broken and soft coal seam closed coring is increased.

The invention relates to a novel drilling fluid for exploring oil shale. The novel drilling fluid for exploring the oil shale is characterized by being prepared from the following components according to a ratio of solid mass to liquid volume in percent: 4.0% of sodium bentonite, 0.04% of sodium carbonate, 0.9% of low-viscosity sodium carboxymethylcellulose, 0.06% of hydrolyzed polyacrylamide, 1.0% of sulfonated bitumen and the balance of water. The novel drilling fluid for exploring the oil shale has strong protecting wall anti-sloughing property and good flowing deformation property, has functions of blocking small cracks and preventing sticking and has the characteristics that preparation is simple, operation is easy and cost is low.

The invention relates to a water-jacket type reverse microcirculation guiding coring device. The coring device comprises a drill bit and a clamp spring seat, wherein the clamp spring seat is nested inthe drill bit, a through water tank is arranged on the outer side wall of the clamp spring seat, a drill bit matrix and a drill bit matrix working layer are arranged at one end of the drill bit, direct water injection nozzles and side water injection nozzles communicating with the water tank are arranged on the drill bit matrix and the drill bit matrix working layer, and direct water injection tanks and side water injection tanks are further arranged in the drill bit matrix and the drill bit matrix working layer. According to the coring device, other matching structures of a rope coring drilling tool are integrated and effectively combined, so that a fractured formation can smoothly enter an inner pipe for guiding while drilling fluid is prevented from directly eroding rock cores, the rock core clamping distance is shortened during coring, and therefore, the rock core recovery rate is increased.

The present application discloses a method, device and device for recommending packaged ingredients based on an e-commerce platform. The above method includes acquiring the user's required ingredient information; evaluating the matching degree between the packaged ingredient information in the packaged ingredient library associated with the e-commerce platform and the required ingredient information, and determining the target packaged ingredient based on the matching degree; and recommending the target packaged ingredient to the user. The present disclosure obtains the user's required ingredient information through an e-commerce platform and evaluates the matching degree between the packaged ingredient information in the packaged ingredient library and the required ingredient information, so that the user does not need to search massively and one by one for the packaged ingredients that match the required ingredients. It greatly saves the time and workload of purchasing ingredients.

The invention discloses a through hole type single-action double-tube drill tool which comprises an inner tube and an outer tube. The outer tube sleeves the inner tube, a diamond drill bit is connected with the bottom of the outer tube, and an upper driving connector is connected with the upper end of the outer tube; a clamp spring seat is arranged at the bottom of the inner tube, and a clamp spring is arranged on the clamp spring seat; the upper end of the inner tube is rotationally connected with the upper driving connector by a connecting component, and washing passages which are communicated with the inner tube are arranged on the connecting component and the upper driving connector. The through hole type single-action double-tube drill tool in the design has the advantages that the washing passages are arranged on the connecting component and the upper driving connector, pumps can be started to punch holes after the through hole type single-action double-tube drill tool reaches hole bottoms (the through hole type single-action double-tube drill tool is separated from the hole bottoms by distances ranging from 100 millimeters to 250 millimeters), water flow can directly reach the hole bottoms, the through hole type single-action double-tube drill tool is high in flow rate and pressure, accordingly, residues at the hole bottoms can be carried out of the ground from gaps of hole walls along with the water flow, the hole bottoms can be thoroughly washed, the through hole type single-action double-tube drill tool is favorable for drilling and the integrity of rock cores, the drilling efficiency can be improved by 10%-20%, and the integrity rate (the core recovery rate) of the rock cores can be increased by 10%-20%.

The invention relates to a preparation method of potassium magnesium salt mine drilling fluid, which includes the following steps: (1) weighing and taking raw materials according to the following proportion by weight 50-70% of water, 20-30% of magnesium chloride, 0.1-4% of potassium chloride, 0.1-3% of sodium chloride, 4-15% of bentonite and 0-1% of carboxymethylcellulose; (2) adding water into a stirring tank, adding magnesium chloride, and stirring to enable the magnesium chloride to be dissolved completely; (3) adding potassium chloride and sodium chloride sequentially into the stirring tank and stirring to enable the potassium chloride and sodium chloride to be dissolved; and (4) adding the bentonite and the carboxymethylcellulose into the stirring tank, stirring evenly, and obtaining the potassium magnesium salt mine drilling fluid. The preparation method is simple in process, low in cost and capable of effectively avoiding corrosion of a wall of a well. Compared with the prior art, salt mine core extracting rate can be effectively improved, and an improving effect of core extracting rate for a sylvine layer, especially for a carnallite mineral layer is remarkable.