76 results about "Baryte" patented technology

The invention discloses a surface lipophilic modified barite weighting material as well as a preparation method and application thereof, and belongs to the technical field of drilling fluids. The surface lipophilic modified barite weighting material comprises barite and a surface modifier, and the surface modifier comprises a copolymer formed by polymerizing a monomer A, a monomer B, a monomer C and a monomer D. According to the invention, the lipophilicity of the barite is chemically modified by the surface modifier, and all monomers have a synergistic effect, so that when the grafted and modified barite weighting material is used as the weighting agent of the oil-based drilling fluid, the dispersity and the stability of particles in the oil-based drilling fluid can be improved, and the rheological property, the plugging property and the high-temperature resistance of the drilling fluid can be adjusted.

The invention discloses a method for quantitatively testing the content of organic carbon and disseminated particle size in gold ore, and belongs to the technical field of gold ore detection. The method comprises the steps of sample preparation and quantitative testing, wherein palm wax serves as a cementing agent, barite serves as a standard sample, and a to-be-tested sample is prepared through melting, mixing, consolidation, polishing and carbon spraying; the quantitative test is based on an automatic process mineralogy test system, palm wax backgrounds are removed through backgrounds deduction, an energy spectrum library is established to recognize organic carbon and barite particles, the area ratio of the organic carbon and the barite particles is measured, the mass ratio is converted by combining the density ratio, the organic carbon content of raw ore is inversely calculated, and meanwhile, the particle size distribution of the organic carbon is counted. The method solves the problem that the content and granularity of organic carbon cannot be accurately quantified at the same time in the prior art, has the advantages of high test precision, high efficiency, comprehensive parameters and simplicity and convenience in operation, and can provide key data for optimization of a gold ore cyanidation leaching process.

The invention discloses a new-type barite deposit mineralization mode construction method based on a same sedimentary fault. The method belongs to the field of geological exploration and mineral resource prediction, and comprises the following steps: analyzing the earth crust cracking activity history of an earthquake-Hangjian broken basin, and recovering a basin'checkerboard 'structure prototype; by means of field geological survey and research, drilling engineering, geophysics, remote sensing geological big data and the like, north-east-east-direction and north-west-direction co-sedimentary fault networks are identified and modeled, and a deep metallogenic fluid rising and jet flow channel is determined; the metallogenic process is concluded into a hydrothermal jet flow stage and an underwater gravity flow deposition stage, deep fluid is revealed to rise, jet flow and precipitate along a fault, and an ore-rich zone of a composite seabed fan body group is formed; and a geochemical prospecting prediction model combining trace element and sulfur isotope characteristics is established. The method systematically clarifies a coupling mechanism of ore control of the same sedimentary fault, ore-forming fluid migration and gravity flow deposition, and provides a theoretical basis and a technical means for prospecting prediction of the barite deposit in the Hendan-Hangjian fault basin.

The invention provides a soilless phase reservoir protection water-based drilling fluid as well as a preparation method and application thereof, and belongs to the technical field of drilling fluids. The drilling fluid is prepared from the following raw materials in parts by mass: 100 parts of water, 0.2-0.4 part of a first pH regulator, 1-3 parts of a deoxidant, 0.1-0.4 part of a tackifying and shear strength improving agent, 2-4 parts of a filtrate reducer, 4-6 parts of magnesium-aluminum hydrotalcite, 4-6 parts of micro-nano aluminum oxide, 4-6 parts of superfine calcium carbonate, 4-6 parts of a lubricant, 1-2 parts of a corrosion inhibitor and 70-660 parts of an inorganic salt weighting agent. The drilling fluid disclosed by the invention is excellent in high-temperature resistance, good in rheological property and excellent in filtrate loss reduction performance; the drilling fluid disclosed by the invention can be prepared into saturated CaCl2 and saturated CaBr2 systems, does not contain barite and clay, is high in mud cake acid solubility, has permeability recovery of more than 72% after plugging, is good in reservoir protection, and has potential of on-site large-scale application.

The invention provides a drilling fluid and a preparation method thereof. The drilling fluid comprises the following raw materials: water, bentonite, sodium hydroxide, a filtrate reducer, an inhibitor, potassium chloride, a tackifier, a lubricant, a plugging agent, a film-forming agent and barite. Wherein the film-forming agent is prepared from the following raw materials in parts by weight: 50 to 60 parts of organic silicon solvent, 80 to 100 parts of ethanol water solution, 10 to 15 parts of polyurethane particles and 10 to 15 parts of nano silicon dioxide. The drilling fluid provided by the invention can prevent the drilling fluid or filtrate thereof from entering fine and micro-nano cracks of a shale well section, so that the influence of hydration or capillary force on a shale stratum is reduced, and the well wall stability problem in shale drilling can be fundamentally solved.

The invention discloses a high-temperature-resistant reversible emulsion drilling fluid and a preparation method thereof.The high-temperature-resistant reversible emulsion drilling fluid is prepared from, by weight, 30-60 parts of a water phase, 50-70 parts of an oil phase, 3-8 parts of a reversible emulsifier, 0-6 parts of organic soil, 0-5 parts of a wetting agent, 0-5 parts of a filtrate reducer, 0-3 parts of calcium oxide and 0-1800 parts of barite, the general formula of the reversible emulsifier is R-CONH (CH2) aNHb (CH2) c (CH3) d, wherein R is long-chain fatty acid with a plurality of methyl branched chains, and a-d are the number of groups. The reversible emulsifier can be utilized to make up the disadvantages of the traditional oil-based drilling fluid in a mud cake removal stage, and compared with the existing drilling fluid, the oil-based drilling fluid has the advantages of higher temperature resistance and lower filter loss, and can adapt to a wider temperature range.

This invention discloses a fissure grouting material, its preparation method, and its application, belonging to the technical field of radiation protection engineering materials. By mass, its raw materials include: 45-60 parts barite sand, 25-35 parts sulfoaluminate cement, 8-20 parts borax, 2-5 parts boron carbide powder, 1-5 parts nano-gadolinium oxide, 5-15 parts lithium slag powder, 3-8 parts barium sulfate whiskers, 3-8 parts polymer emulsion, 0.5-1.5 parts water-reducing agent, 0.1-0.5 parts stabilizer, and 18-25 parts water. This invention provides high-density gamma-ray shielding through barite sand, achieves all-round neutron protection through a quaternary composite neutron absorption system, enhances the material's toughness and shielding effect through barium sulfate whiskers, and ensures high fluidity and interfacial bonding strength of the grout through the polymer emulsion. This material is particularly suitable for sealing and shielding fissures in the surrounding rock of radioactive tunnels, possessing advantages such as excellent shielding effectiveness, good construction performance, high volume stability, and long-term durability.

This invention discloses a high-temperature resistant, high-density water-based drilling fluid for ultra-deep wells and its preparation method, belonging to the field of oil and gas drilling technology. The drilling fluid is composed of the following components in parts by weight: 100 parts water, 2-5 parts high-temperature resistant modified clay, 150-280 parts composite weighting agent, 8-15 parts high-temperature resistant polymer filtration loss reducer, 3-8 parts core-shell type high-temperature resistant flow modifier, 4-10 parts nano-composite plugging agent, and 2-5 parts high-temperature stabilizer. This invention effectively solves the technical problems of rheological runaway, increased filtration loss, and barite sedimentation in ultra-deep well high-density water-based drilling fluids under high-temperature conditions above 220℃ by utilizing the high-temperature expansion-disintegration mechanism of the core-shell type flow modifier, nano- to micron-level multi-stage plugging, and the close packing of spherical and irregular weighting materials. It exhibits temperature resistance up to 220℃ and a density of 2.80 g / cm³. 3 It has the advantages of low filtration loss under high temperature and high pressure and good sedimentation stability.

Drilling fluid compositions may include a weighting agent, a nitrite-containing compound, and an ammonium-containing compound, where the nitrite-containing compound and the ammonium-containing compound may be encapsulated together in copolymer micro-particles forming encapsulated thermochemical compounds, and where at least one property selected from the group consisting of the density, the plastic viscosity, the yield point, the gel strength, and the pH, of the drilling fluid composition may be substantially similar to the at least one property of a comparable drilling fluid composition devoid of the encapsulated thermochemical compounds. Methods for reducing a filter cake from a wellbore surface in a subterranean formation are also provided. The methods may include introducing into the wellbore the drilling fluid compositions, allowing the drilling fluid composition to reach a temperature in the wellbore sufficient for the encapsulated thermochemical compounds to react, where the reaction of the encapsulated thermochemical compounds generates heat and nitrogen gas.

The invention relates to the decontamination of radiation-contaminated lands with clay and loose soil, such as agricultural lands, as well as abandoned test sites, such as the Semipalatinsk test site and uranium quarries. In the method for decontaminating radioactively contaminated lands, which includes the introduction of a reagent, according to the invention, the area of ​​the land to be treated is filled with a 5-7 cm thick layer of KB3 grade barite concentrate containing at least 90% barium sulfate, or finely crushed barite-lead ore containing 70% barium sulfate and up to 1% lead sulfate, Then the land is ploughed using a heavy eight-body plow to a depth of at least 300 mm, turning over the soil layer and dumping it in an inverted position for the complete burial of the radioactively contaminated mass, after which the land is harrowed and reclaimed with the sowing of grass seeds. The developed method for decontaminating radioactively contaminated lands makes it possible to decontaminate lands over a large area and eliminates the need to extract fragments containing adsorbed radionuclides from the soil.

Drilling fluid compositions may include a weighting agent, a nitrite-containing compound, and an ammonium-containing compound, where the nitrite-containing compound and the ammonium-containing compound may be encapsulated together in copolymer micro-particles forming encapsulated thermochemical compounds, and where at least one property selected from the group consisting of the density, the plastic viscosity, the yield point, the gel strength, and the pH, of the drilling fluid composition may be substantially similar to the at least one property of a comparable drilling fluid composition devoid of the encapsulated thermochemical compounds. Methods for reducing a filter cake from a wellbore surface in a subterranean formation are also provided. The methods may include introducing into the wellbore the drilling fluid compositions, allowing the drilling fluid composition to reach a temperature in the wellbore sufficient for the encapsulated thermochemical compounds to react, where the reaction of the encapsulated thermochemical compounds generates heat and nitrogen gas.

The application provides a heavy medium separation method for phosphate ore, fluorite ore, barite ore and polymetallic ore, which comprises the following steps: separating the ore corresponding to the real-time operation state data of the ore through a preset gradient density heavy medium separation system; the gradient density heavy medium separation system has a partition independent medium recovery module and a suspension liquid density intelligent control module; and the separation density characteristics are obtained through the partition independent medium recovery module and the suspension liquid density intelligent control module. The application can realize the accurate separation of polymetallic associated ore, obtain various products such as phosphate concentrate, fluorite concentrate and barite concentrate, and improve the resource utilization rate. In addition, the anti-mud interference control algorithm is generated through a medium non-magnetic substance content accumulation prediction model, which effectively deals with the separation challenge of ore with different mud content and grade, and ensures the stability and separation precision of the system under complex working conditions.

The application relates to an industrial-vision-based barite ore sorting and distributing device and a sorting machine, and belongs to the technical field of ore sorting. The device comprises a supporting frame and a conveying belt assembled in the supporting frame. A high-precision visual detector, a dynamic hot film mechanism and a high-speed visual sensor are sequentially arranged on one side of the supporting frame from bottom to top. The optimized design of the dynamic hot film mechanism realizes efficient water and dirt removal of wet and sticky ores. Two groups of ultrasonic transducers are arranged on the upper and lower sides of the hot air cavity, the vibration direction of the ultrasonic transducers is at a specific angle with the axis of the hot air flow, and the forced air flow formed by the built-in heating rod and the high-pressure vortex fan can make the ultrasonic vibration and the hot air flow act on the ore surface in cooperation, so that the surface moisture can be quickly evaporated through heating, and stubbornly adhered impurities can be peeled off with the help of ultrasonic vibration. Meanwhile, the dustproof net at the output end of the air outlet bin can prevent the backflow of impurities, guarantee the cleanliness of the ore surface after pretreatment, and provide a clear detection object for optical detection.

The application discloses a preparation method of a low-interference bactericide filler, and the low-interference bactericide filler is prepared from high-purity barite and non-asbestos high-purity white talc ore as raw materials through wet ball milling and airflow milling to obtain superfine barium sulfate and talc powder raw powder with specific particle sizes; the talc powder raw powder is pretreated by urea gas phase intercalation, the barium sulfate is activated by glacial acetic acid gas phase, and then the two are compounded according to a ratio of 6-9:4-1, surface modification is carried out through multi-step spray addition of a compounding modifier, and finally, the finished product is obtained through demagnetization and sieving. The 24h BIT bactericide adsorption rate of the filler is less than 10%, the bactericide decay rate can be greatly reduced when the filler is applied to water-based paint, the mildew resistance, scrub resistance and sedimentation resistance of a paint film are improved, the industry pain point that the bactericide efficiency is interfered by traditional fillers is solved, and the low-interference and performance enhancement effects of the paint are combined.

The invention discloses a copper-based powder metallurgy friction material containing composite iron powder and a preparation method of the copper-based powder metallurgy friction material. The friction material is prepared from, by weight, 45%-60% of electrolytic copper powder, 10%-20% of the composite iron powder, 10%-15% of granular graphite, 1%-5% of barite, 3%-6% of tungsten oxide, 2%-4% of high-carbon ferrochrome, 2%-4% of silicon dioxide and 1%-2% of porous zirconium carbide ceramic. Compared with the prior art, the friction material has the positive effects that the iron powder prepared by two different processes is added into the friction material, and optimal granularity matching is carried out, so that the strength and the hardness of the material are improved, and meanwhile, the noise generated in the braking process is effectively reduced. According to the invention, the porous zirconium carbide ceramic is added into the friction material, so that the heat resistance of a brake pad can be improved, the stability of a friction coefficient is ensured, and vibration and noise during braking are reduced.

The application discloses a method for determining the position of drilling fluid leakage and calculating leakage parameters, which is used for finding the position of well leakage during drilling, calculating the leakage speed and leakage amount of drilling fluid, and estimating the leakage scale. The application describes the principle that the photoelectric absorption cross section Pe value of barite contained in the drilling fluid is abnormally high compared with other rocks, minerals and fluids, and the leakage position is accurately positioned by the characteristics of the high value of the Pe curve measured by the lithology density logging in the leakage well section, and the leakage speed is predicted by the correlation between the Pe logging value and the instantaneous leakage speed, and the leakage amount is calculated by combining the method of multi-mineral analysis with the actual content of barite in the drilling fluid. The method is simple and easy to operate, and the accuracy is reliable. Compared with the data provided by the field, the error of the leakage speed and the leakage amount calculated by the method is small, and the effect is good.

The utility model relates to a vibrating screen feeding adjusting device for barite powder production, which comprises a vibrating screen shell communicated with a feeding pipe. The feeding pipe is a rectangular pipe, the movable plates are symmetrically arranged in the left portion and the right portion of the feeding pipe, the upper end of the movable plate on the left side is hinged to the upper end of the inner wall of the left side of the feeding pipe, and the lower ends of the two movable plates are close to or away from each other; the control piece comprises rotating rods and top plates, the rotating rods are rotationally arranged on the lower side of each movable plate, the top plates are connected to the upper ends of the peripheral walls of the two rotating rods, and the free end of the left top plate is in sliding contact with the left side face of the left movable plate; a driving piece for driving the two rotating rods to rotate oppositely or oppositely is arranged on the feeding pipe, and the two rotating rods rotate oppositely so as to drive the lower ends of the two movable plates to be close to each other and make contact with each other. The utility model solves the problem that the size of the feed port of the vibrating screen is difficult to adjust when the vibrating screen is used for screening barite powder granules.

This invention discloses a method for the comprehensive utilization of sulfide tailings, relating to the field of sulfide tailings treatment technology. This method uses lead-zinc tailings as raw material and innovatively employs a combined "two-stage acid leaching-gravity separation-flotation" process. First, two stages of acid leaching selectively leach calcite associated with barite in the tailings, reducing the influence of muddy calcite while activating pyrite. Subsequently, the acid leaching residue undergoes gravity separation to further separate undissolved calcite, quartz, and other silica-containing gangue minerals. The gravity concentrate is then subjected to flotation to achieve the separation of barite and pyrite, ultimately obtaining high-purity barite and pyrite products respectively. This invention features a reasonable process route and simple operation, effectively solving the separation problem of fine-grained, high-viscosity lead-zinc tailings, achieving full-component purification and utilization of lead-zinc tailings, significantly enhancing the economic value of tailings resources, and reducing the environmental pressure caused by tailings stockpiling, thus demonstrating good economic, environmental, and social benefits.

The invention relates to the technical field of mineral content detection, in particular to a method for simultaneously determining total barium and sulfur in barite through acid dissolution-inductively coupled plasma emission spectrometry. The method comprises the following steps: adding nitric acid and hydrochloric acid into barite, heating on an electric heating plate, adding a chromium internal standard solution and a nitric acid solution, heating, cooling, and determining by using an inductively coupled plasma emission spectrometer. According to the method, simultaneous determination is achieved in an acid dissolution mode, the detection efficiency is improved, time and cost are saved, the whole test solution preparation process is relatively simple, accurate volume determination is not needed, sample digestion treatment can be completed through common means such as electric hot plate heating under conventional laboratory conditions, and the method is more stable, easy and convenient to operate, easy to master and suitable for large-scale popularization and application. The reproducibility is good, and popularization and application are convenient. Meanwhile, the method can improve the accuracy and precision of a measurement result, so that the measurement result is more reliable.

The invention discloses a modified fly ash ceramsite proppant and a preparation method thereof, and a combined proppant and a preparation method and application thereof, and relates to the technical field of shale oil and gas fracturing. The modified fly ash ceramsite proppant comprises the following components which are mixed and granulated: fly ash, bauxite, barite powder, a recycled molecular sieve, a recycled mesoporous material, optional calcite powder and optional bentonite. The environment-friendly propping agent disclosed by the invention solves the problems of high production cost and application cost of the fracturing propping agent taking aluminum-containing minerals as main raw materials, and takes the harmless treatment of recyclable resources and industrial wastes in the whole industrial chain of the petrochemical industry into consideration, and the industrial wastes of the downstream of the oil refining and chemical industry are applied to the upstream petroleum fracturing propping agent.

The present application belongs to the technical field of mineral processing. The present application provides a flotation reagent for inhibiting calcite in fluorite-barite intergrowth ore, which comprises a collector and an inhibitor; the collector comprises at least one of sodium oleate and oxidized paraffin soap; the inhibitor comprises 5-mononitrate isosorbide and water glass in a weight ratio of 4-5:1. The present application also provides a corresponding flotation method, which comprises the steps of: preparing fluorite-barite intergrowth ore containing calcite into ore slurry, and then adding the collector and the inhibitor described in claim 1 or 2 to the obtained ore slurry for flotation. The present application can effectively inhibit calcite during the flotation of fluorite-barite intergrowth ore and improve the fluorite recovery rate, and the obtained CaF2 recovery rate is as high as 95% or more; the flotation reagent used in the present application has a small amount of use and low flotation cost.

This invention discloses a method for controlling a blowout in a marine well by drilling through the riser. The method includes the following steps: establishing a working face using scaffolding; pre-positioning the crane vessel, workboat, and guard vessel before the operation; placing the casing drilling equipment, high-pressure pump, fire-fighting equipment, and protective gear on the workboat or wellhead area before drilling; selecting the drilling location and number of holes; pre-installing the riser backplate before drilling the outer riser; drilling the riser, technical casing, and production casing sequentially, confirming the safety of each annulus layer; upon discovering an overflow during drilling, quickly tightening the backplate; and implementing well control operations using heavy brine, barite slurry, or non-dispersible cement slurry. This invention addresses blowout situations in drilling or production wells on offshore platforms. It allows for close deployment of all aspects during emergency rescue, rapid sealing of the outer riser, and connection of the well control manifold to the internal wellbore. This enables successful well control and sealing operations in each annulus layer. The method is highly operable, has a short construction period, and requires minimal investment.

The invention provides a preparation method and application of a sub-nanometer zero-valent composite mineral-based three-dimensional organic framework material for deeply treating silicon and fluorine in photovoltaic wastewater, and belongs to the technical field of deep treatment of fluorine and silicon in photovoltaic wastewater. The preparation method comprises the following steps: respectively crushing lapis lazuli, aluminum-rich pyrophyllite, limonite, phoenix stone, barite and dolomite, sieving, mixing, reducing and roasting in a hydrogen atmosphere to obtain a nano zero-valent complex mineral, adding the nano zero-valent complex mineral into a nano sand mill, adding grinding balls, an organic ligand, an organic solution and a grinding aid, and carrying out multi-element wet-type ball milling to obtain the nano zero-valent complex mineral. The preparation method comprises the following steps: preparing a sub-nano zero-valent complex mineral, performing water bath ultrasonic treatment on the sub-nano zero-valent complex mineral by adopting a 3D printing technology to obtain a 3D-sub-nano zero-valent complex mineral, and finally performing hydrothermal reaction to obtain the sub-nano zero-valent complex mineral-based three-dimensional organic framework material which has high adsorption performance and high activity and can realize efficient removal of silicon-containing and fluorine-containing wastewater. The invention aims to overcome the defects that the existing commercially available adsorbent has low removal rate on silicon and fluorine and is easily interfered by other ions.

The application discloses a kind of neutral plugging remover and preparation method thereof, the neutral plugging remover includes 25%~40% chelating agent, 5%~8% biological enzyme, 10%~20% molybdenum-containing Gemini surfactant, 3%~5% solubilizer, 1%~5% auxiliary agent, pH regulator, and the rest is water by mass percentage.The application can overcome the strong corrosion and strong irritability of strong acid, with the advantages of high scale removal efficiency, safety and environmental protection, which will not cause harm to human health and oil reservoir environment.The chelating agent in the application can react with Ca 2+ , Mg 2+ , Ba 2+ , Sr 2+ , etc. , and form stable water-soluble eutectic, thereby dissolving and corroding insoluble barite and other blockages;The molybdenum-containing Gemini surfactant can accelerate the infiltration and penetration of chelating agent on the surface of barite, thereby accelerating the dissolution of barite;The biological enzyme can decompose and degrade organic matter.

The invention relates to a steel plate concrete shielding workshop and reinforced concrete wall arrangement and connection node, and relates to the technical field of concrete shielding workshops, the steel plate concrete shielding workshop and reinforced concrete wall arrangement and connection node comprises a steel plate concrete assembly, a reinforced concrete wall assembly and a composite connection assembly, the steel plate concrete assembly is fixedly arranged on the outer side surface of the reinforced concrete wall assembly; the steel plate concrete assembly comprises an outer-layer steel plate and inner-layer radiation shielding concrete. The radiation shielding performance is excellent, 15%-20% of barite aggregate and borax are doped into the inner-layer radiation shielding concrete, the barite aggregate can effectively block penetration of gamma rays and the like, the borax can specifically absorb neutron radiation, a dual-radiation protection barrier is formed, and the core requirement of a shielding plant for radiation isolation is met. In the composite connecting assembly, the radiation shielding plug filled in the shear-resistant sleeve is tightly attached to the steel plate concrete assembly and the reinforced concrete wall assembly, and a radiation leakage gap at a connecting node can be filled.

The invention relates to the technical field of barite powder detection and sampling, in particular to a barite powder grinding detection and sampling mechanism which comprises a positioning ring plate detachably connected with a conveying pipeline. The barite powder grinding, detecting and sampling mechanism further comprises a driving unit, wherein the driving unit is arranged on the positioning ring plate; the barite powder grinding, detecting and sampling mechanism further comprises a sampling unit, the sampling unit is connected to the driving unit, and the sampling unit comprises a plurality of collecting parts which are linearly and uniformly distributed. The sampling unit adopted by the invention is provided with a plurality of collecting parts and guiding parts, can perform multi-point dynamic sampling in one sampling process, and can also be matched with the adjusting unit, and only one collecting part and one guiding part work in different time periods, so that dynamic sample collection in a plurality of time periods is completed; sampling equipment does not need to be mounted and dismounted repeatedly, so that the trouble that the equipment needs to be started and stopped repeatedly during traditional single sampling is avoided, and the sampling efficiency is improved.

The application discloses a countercurrent extractant, which comprises the following components in a mass ratio: 40-60 of target oil, 10-20 of methyl ethyl ketone, 0.2-0.5 of sodium silicate and 20-30 of water. The application also discloses preparation and application thereof. The application provides an oil extraction process by low-temperature countercurrent extraction, a flotation method for extracting barite minerals from oil-based drilling cuttings, a method for processing oil-based drilling cuttings by using flotation tailings to prepare proppants, and development of high-efficiency extractants and flotation agents. After countercurrent extraction, the oil content of the oil-based drilling cuttings can be reduced to below 0.3%.

The invention provides oleophylic barite as well as a preparation method and application thereof. The preparation method comprises the following steps: pretreatment, first-time modification with a modifier and second-time modification with a mixed solution of an organic matter containing a phenol functional group and a metal compound in water. The preparation method disclosed by the invention is mild and simple to operate, and the prepared oleophylic barite has a relatively high contact angle value, can be uniformly dispersed in an oil phase at a high temperature, keeps relatively good suspension stability, and has a good application prospect in preparation of high-temperature-resistant oil-based drilling fluid.

The invention relates to the technical field of mineral extraction, particularly discloses a method for efficiently extracting barite single mineral in black mudstone rich in organic matters, and solves the technical problems that micron-sized barite in black mudstone cannot be efficiently extracted in the prior art, lattice destruction / isotope fractionation of barite is easily caused in the extraction process, the purity and the recovery rate are low and the like. The purity of the extracted barite single mineral is larger than or equal to 99%, the recovery rate of fine-fraction barite is larger than or equal to 90%, crystal lattices are complete and free of damage, isotope fractionation and component change are avoided, and the high-precision geochemical test requirement can be met; meanwhile, the method is suitable for various sedimentary rocks such as marine / continental black mudstone, shale and siliceous mudstone, and the applicability is wide.