Dust-removing composition for treating dusty surfaces
SUBSTANCE: dust-removing composition for treating dusty surfaces contains a polyelectrolyte and water, and is characterised by that it contains aqueous solutions of an alkali metal polyacrylate and a copolymer of acrylamide with acrylic acid derivatives, wherein copolymers of acrylamide with dimethylaminoethyl acrylate, dimethylaminoethyl methacrylate or dimethylaminopropyl acrylamide are used, the alkali metal polyacrylate solution has concentration of 0.1-1.0 wt %, the solution of the copolymer of acrylamide with acrylic acid derivatives has concentration of 0.05-0.5 wt %.
EFFECT: good erosion resistance of the treated surface.
The invention relates to the field of environmental protection in iron ore, coal, construction, energy industries, as well as during the construction and operation of roads, and can be used for fastening the dangerous erosion of dust-forming surfaces of the mineral composition of the tailings, dumps, piles of rocks, and in the contaminated areas and roadsides of roads.
Known (SU authorship 1355723) preventive composition to prevent blowing of fine materials containing urea-formaldehyde resin, curing agent, calcium chloride and water.
A disadvantage of known composition are lowered resistance resulting from the destruction of water-soluble polymer precipitation, and low mechanical strength of the resulting polymer film vibration that occurs during transport of fine goods and negative temperatures below minus 20°C.
Also known (SU authorship 1317160) the composition for fixing dusty surfaces, in order to improve the effectiveness of the consolidation by creating a non-dusting layer produce alkaline prophylactic treatment, including acetonitrile resin, chloride salt, the poly is relaid, sulfite-alcohol wine and other
The disadvantage of this composition should recognize its shortcomings are due to the effects of rainfall, drastically reducing the concentration of the solution as a result of erosion of the surface layer, and the high cost of operating components for preparation of the alkaline solution.
Known (EN, application 93011503/03) organic composition for fixing dusty surfaces in the form of 2-10% aqueous solution smilenov tall oil pitch. The latter, being deposited on the surface, is treated with a mineral or organic acid.
The drawbacks of composition are introduced into the structure of the processed surface of the heavy aromatics, which has a negative environmental impact, and corrosion of vehicles and mechanisms in operation.
Known (SU authorship 1030565) the composition for fixing dusty surfaces, including urea-formaldehyde resin and an aqueous solution of inorganic acid.
The disadvantages of this structure are the selection of environmentally hazardous formaldehyde in the formation and operation of the polymer film, poor wettability with respect to the iron-containing minerals, corrosion of vehicles and machinery, due to the high concentration the AI inorganic acid in solution.
The closest analogue of the developed composition can be recognized (SU authorship 1190067) the composition for fixing dusty surfaces, comprising the polyelectrolyte in the form of a copolymer of alkali metal methacrylate and methyl methacrylate, as well as water.
The composition with the positive environmental qualities has poor wettability of the surfaces of mineral particles, unsatisfactory surface tension and the strength of the film, resulting in under the influence of atmospheric factors (solar radiation, wind erosion, precipitation) protective polymer film is destroyed.
Technical result achieved during the implementation of the developed composition, is to increase the strength and durability of the coating of dusty surfaces, which improves the environmental situation in the area of dangerous erosion of dusty surfaces.
To achieve the technical result of the proposed use of the composition for treatment of dust-forming surfaces containing aqueous solutions of alkali metal polyacrylate and copolymer of acrylamide derivative of acrylic acid, used copolymers of acrylamide with dimethylaminoethylacrylate, dimethylaminoethylmethacrylate or dimethylaminopropylamine, and the concentration of the solution of alkali metal polyacrylate SOS is to place 0,1-1,0% (mass), as the concentration of the solution of a copolymer of acrylamide derivative of acrylic acid is 0.05 to 0.5% (mass).
Really use polyacrylate sodium or potassium.
The developed structure is based on the joint use of differently charged high molecular weight polyelectrolytes, one of which (polyacrylate sodium or potassium) connects substances dust due to electrostatic interaction, and a copolymer of acrylamide neutralizes excess electric charge on erosive dangerous dusty surface with the formation of a mesh structure polymer (--) - polymer (+), thereby increasing the strength of binding dust particles anionic polyelectrolyte.
The application of aqueous solutions of polyelectrolytes on erosive dangerous dusty surface produced by the queue at the beginning of the applied aqueous solution of alkali metal acrylate, and then an aqueous solution of a copolymer of acrylamide. The time interval between application of the two solutions depends on the external conditions (temperature, humidity), and the size of the retained dust particles and their nature.
In the preferred implementation uses the solutions of specified concentrations in the amount of from 1.5 to 2.5 g/m2square.
Research on the effectiveness of the developed composition was carried out according erosion resistance of the sample taken from the dumps heat the new power plant, working coal (Kemerovo). Erosion resistance was evaluated by the magnitude of the weight loss of the treated sample at time intervals of 4-6 hours after treatment with solutions of polyelectrolytes within the composition. The sample is a metal tray area of 50 cm2with a wall height of 1 cm sample Mass of approximately 400 grams. After application of the solutions and their drying on a tray directs the flow of air using a fan for 40 hours (8 days and 5 hours). The loss in weight of less than 8% was accepted as satisfactory.
1. The first experiment was conducted using a composition used as the nearest equivalent. The sample weight 410 grams was treated with composition containing (%):
|copolymer of 50 mol.% methacrylate alkaline metal|
|and 50 mol.% methylmethacrylate||10|
After 6-hour exposure for the full formation of a film on the surface of the sample surface blew over 40 hours. Weight loss was 9.7%.
2. A similar sample weight 405 g treated initially with an aqueous solution of polyacrylate sodium concentration is a function of 0.5% (mass) in an amount of 2 g/m 2and then an aqueous solution of a copolymer of acrylamide with dimethylaminoethylacrylate concentration of 0.25% (mass) in an amount of 1.5 g/m2. Blowing air started within 1 hour after termination of treatment. Conditions of ventilation were similar to example 1. Weight loss was 4.4%
3. The experiment is carried out analogously to example 2, but using the solution of sodium polyacrylate concentration of 0,1% (mass) in the same amount and the solution of a copolymer of acrylamide with dimethylaminoethylmethacrylate concentration of 0.05% (mass). Weight loss was 6.2%.
4. The experiment is carried out analogously to example 2, but using a solution of potassium polyacrylate concentration of 1.0% (mass) in the same amount and the solution of a copolymer of acrylamide with dimethylaminopropylamine of 0.5% (mass). Weight loss was 3.7%.
5. The experiment is carried out analogously to example 2, but using the solution of sodium polyacrylate concentration of 0.5% (mass) in the same amount and the solution of a copolymer of acrylamide with dimethylaminoethylmethacrylate 0,1% (mass). Weight loss was 5.1%.
6. The experiment is carried out analogously to example 2, but using a solution of potassium polyacrylate concentration of 0,1% (mass) in the same amount and the solution of a copolymer of acrylamide with dimethylaminopropylamine of 0.5% (mass). Weight loss was 4.8%.
7. The experiment is carried out analogously to example 2, but using the solution in which acrylate potassium concentration of 0.08% (mass) in the same amount and the solution of a copolymer of acrylamide with dimethylaminopropylamine of 0.5% (mass). Weight loss amounted to 9.2%.
8. The experiment is carried out analogously to example 2, but using a solution of potassium polyacrylate concentration of 1.0% (mass) in the same amount and the solution of a copolymer of acrylamide with dimethylaminoethylmethacrylate 0,003% (mass). Weight loss amounted to 10.7%.
9. The experiment is carried out analogously to example 2, but using a solution of potassium polyacrylate concentration of 1.2% (mass) in the same amount and the solution of a copolymer of acrylamide with dimethylaminopropylamine of 0.3% (mass). Weight loss was 9.8%.
10. The experiment is carried out analogously to example 2, but using the solution of sodium polyacrylate concentration of 0.9% (mass) in the same amount and the solution of a copolymer of acrylamide with dimethylaminoethylacrylate of 0.6% (mass). Weight loss was 8.4%.
Examples confirm the achievement of the technical result in the case of the combination of features stated in the independent claim.
The dedusting composition for the treatment of dust-forming surfaces containing polyelectrolyte and water, characterized in that it contains aqueous solutions of alkali metal polyacrylate and copolymer of acrylamide derivative of acrylic acid, used copolymers of acrylamide with dimethylaminoethylacrylate, dimethylaminoethylmethacrylate or dimethylaminopropylamine the Ohm, as the concentration of the solution of alkali metal polyacrylate is 0.1 to 1.0 wt.%, as the concentration of the solution of a copolymer of acrylamide derivative of acrylic acid is 0.05-0.5 wt.%.
SUBSTANCE: method of mine insulation involves preliminary determination of rock deformation depth around the mine to be insulated. Further, a system of blast holes not deeper than rock deformation zone is created in insulation area before bridge erection. Blast holes are positioned in fan pattern, with at least three rings formed across the mine to be insulated. Work agent is loaded to blast holes till intake is exhausted. Then, airtight bridges are installed in blast hole intervals between outermost rings, and gas medium is pumped to space between bridges to maintain gas pressure in space between bridges not lower than pressure in the insulated mine during the whole mine insulation period.
EFFECT: enhanced reliability of mine insulation by sealing surrounding rock fractures regardless of fracture position and formation time.
3 cl, 1 ex, 4 dwg
SUBSTANCE: method includes supply of inert gas in mined space in liquid condition. At the same time the inert gas is supplied in a tightly closed reservoir with a broken shell. The reservoir shell is damaged at the specified temperature and is controlled by variation of dimensions and mechanical strength of the shell. Tightly sealed reservoirs are fed to the mined space along wells drilled from the surface or from mines, or are placed in the mined space at the bottomhole side, if lava is moving.
EFFECT: improved efficiency of fire fighting in mines, safety of mining works.
SUBSTANCE: method consists in collection of data related to depth of mining operations h, length of working face LE of the value of excavated stope ℓ with falling angle α and its capacity m, rate of working face advance ν, weighted average coefficient of coal strength f, stresses in an untouched massif σ0 and on the face line σз, primary ξpr and secondary ξ0 steps of roof collapse, strength limit of rocks for simple compression σ com, rheological parameter α, reduced time t, coefficient of concentration of stresses K and distance from the face to maximum pressure Xav. Specified data is substituted into a mathematical formula, if any of the specified data is produced by calculations. Using the value of outburst hazard value, working face outburst hazard is decided.
EFFECT: higher efficiency of prediction due to selection of technical parameters that most accurately characterise conditions for uncoupling of a spontaneous outburst of coal and gas.
3 cl, 1 dwg
SUBSTANCE: method consists in detection of mining operations performance depth from surface, section of a mine by coal, pressure of gas in an untouched bed massif, coefficient of weighted average coal strength in a bed, coal adhesion, stress in a coal massif along a face line and area of coal massif unloading in front of the face. The specified data is substituted into a mathematical formula, with the help of which prediction of outburst hazard of a development drift R is made. If R>0, the bed is related to outburst hazardous, and if R<0 - to safe regarding coal and gas outbursts.
EFFECT: possibility to apply the method both when tunnelling and at the design stage due to use of technical characteristics of mines carried out under similar conditions or being at the stage of design solutions.
SUBSTANCE: method includes drilling of wells between earth surface and roof of an underground mine, erection of an insulating barrier link by supply of a hardening material into an underground mine whenever an emergency occurs related to self-ignition of coal. The section of the underground mine in the place of erection of the isolating barrier link is worked with increased height, which is gradually increased from borders of this section to its middle. The well is drilled between earth surface and a point with maximum height of the underground mine, and supply of the hardening material into a mine is carried out to complete filling of the section with increased height with hardening material. On the borders of the section with increased height of the mine prior to start of hardening material supply into an underground mine, barriers are installed, width of which is accepted as equal to or less than the width of the mine in the place of barriers installation, and the height of the barriers is determined using a special expression.
EFFECT: increased reliability of isolation of an emergency section in case of underground fires and reduced material and labour inputs.
SUBSTANCE: set of inventions relates to safe deep mining of solid hydrocarbons. Proposed method proceeds from continuous ground monitoring of geodynamic state of massif and seismic activity of bed roof and bed working on surface area covering bed headway in real time by passive prospecting seismology methods. Obtained results are automatically processed to isolate zones with abnormally-high seismic energy emission, define their area and depth coordinates so that map of anomalies of seismic emission. Maximum magnitudes of seismic emission are used to define coordinates of slope ratio of coal bed fracturing well. Development of main cracks is forecast from the well by the method of double refraction of transverse waves from surface excitation source. After fissuring, direction of main crack development in face bulk is controlled. Area is drilled from surface in directions of main crack development to pump methane out from the wells. With seismic emission decreasing, possibility to extract coal is forecast.
EFFECT: higher safety and intensity of coal extraction.
3 cl, 3 dwg
SUBSTANCE: method to prevent explosion of a gaseous mixture includes removal of combustible gas from a monitored room through ventilation. At the same time it is additionally burnt by periodical ignition, with one or several electrical dischargers, controlled with a timer. Dischargers are installed in the monitored room around potential areas of combustible gas leakages at the minimum distance sufficient for its ignition. The ignition period is defined with the minimum time for creation of an explosive gaseous mixture around the discharger and is set with the timer's programme.
EFFECT: higher efficiency of preventing explosion of a gaseous mixture.
SUBSTANCE: method includes well drilling between surface and roof of underground mine working, delivery of hardening material to the mine working in case of emergency situation related to coal fire breeding. Section of underground mine working is driven in the place of isolating barrier wall erection; height of mine working is increased towards the middle of the section. Well is drilled between ground surface and point of maximum height of underground mine working. Hardening material is delivered to the mine working till mine working section driven with various height is completely filled. Maximum height of mine working in the middle of this section is determined by expression hmax≥hb+tgφ·b/2h where hmax is maximum height of underground mine working on the section of isolation barrier wall erection, m; hb is height of underground mine working outside the section within which isolation barrier wall is erected, m; φ is angle of hardening material spreading, degrees; b is width of underground mine in the rough, m.
EFFECT: improving reliability of emergency section isolation during underground fire.
SUBSTANCE: method includes measurement of concentration of tracer gases in air at outlet from accumulation of coal and rock providing that their background values have been measured. Additionally quantity of water vapour in air is determined and concentration of tracer gases in dry air is determined by formula cc = c / (1 - Fm), where Cc - concentration of tracer gases in dry air, fraction units; C - measured concentration of tracer gas in sample of mine air, fraction units; Fm - fraction of water vapour in unit of mine air, fraction units.
EFFECT: improving efficiency of detection of coal spontaneous ignition processes.
SUBSTANCE: automated system for control and prevention of explosion of dust-methane-air mixture in complex mechanised mining face consists of irrigation pipeline, high-pressure pump, low-pressure and high-pressure pipelines of automated system with electrical valves and solenoid valves, nozzles for waterspray, measuring instruments for methane, carbonic oxide, humidity, dust level of mine atmosphere and ash-content in dust, air flow rate in the beginning and in the end of mechanised mining face, measuring instruments for methane content and position sensor installed directly on cutter-loader, measuring instruments for water pressure in pipelines connected via data transmission modules to communication lines and controller, control unit with lines for control of electrical valves and solenoid valves. The system differs in the fact that during constant control of measuring instruments readings, position of cutter-loader in mining face, electrical valves and solenoid valves, which are recorded to "black box", divergence of input and output parameters from specified values and proximity of content of methane, dust and its ash-content, carbonic oxide in mine atmosphere to lower level of explosion of dust-methane-air mixture is analysed continuously, control actions are developed with prefacing for dispersed supply of fine water calculated volume from high-pressure pump through high-pressure pipeline, electrical valves and fine-spray nozzles to space of complex mechanised mining face in order to provide condensation point in mine atmosphere considering actual temperature. At that fine water is supplied opposite to air flow in mining face before and/or after cutter-loader considering direction of its movement and system transportation lag.
EFFECT: improving control and preventing explosion of dust-methane-air mixture in complex mechanised mining face.
FIELD: oil and gas industry.
SUBSTANCE: as per an oil deposit development method involving pumping of fringe of biological surface active substance bioSAS KShAS-M and hydrocarbon solvent, first, aluminosilicate composition based on 11% of hydrochloric acid solution is pumped; in addition, fringe contains oil and formation water, and isooctane as a solvent; with that, fringe contains the following, %: formation water 54-88, bioSAS KShAS-M 1-2, isooctane 1-4, and oil 10-40.
EFFECT: improving development efficiency of an oil deposit under conditions of non-homogeneous formations as to permeability at a later stage of their development under conditions of formation waters of different mineralisation.
2 ex, 2 tbl
FIELD: oil and gas industry.
SUBSTANCE: use of preparation OC-20 containing mixture of polyoxyethylene glycol esters of synthetic primary higher fatty alcohols with fraction C16-C18; ethoxylated (20 EO) cetyl and stearyl alcohols; oxyethylated (20 EO) hexa (octa) decyl alcohol, non-ionic SAS as solid or liquid reagent for removal of formation fluid with high-mineralised formation water (total mineralisation 100-300 g/l) from gas and gas-condensate wells.
EFFECT: providing effective removal of liquid from gas and gas-condensate wells, in the products of which high-mineralised formation water is contained due to high foam formation degree.
FIELD: oil and gas industry.
SUBSTANCE: composition containing cross-linked polymer microparticles having average diameter of particles of non-increased volume of approximately 0.05 to approximately 5000 mcm and content of cross-linking agents of approximately 100 to approximately 200000 ppm, labile cross-linking agents and 0 to approximately 300 ppm of non-labile cross-linking agents; besides, expanded polymer microparticles have structure of block copolymer containing at least two different monomers with different chemical structure. Besides, a method for improvement of production of hydrocarbon fluids from an underground formation is described, which involves pumping of the proposed composition to the underground formation.
EFFECT: proposed composition provides effective spreading of microparticles in porous structure of deposit, thus increasing extraction degree of hydrocarbon fluids from underground formations.
20 cl, 3 ex
FIELD: oil and gas industry.
SUBSTANCE: drilling mud on hydrocarbon basis, which includes highly oxidised high-melting bitumen, surface active substance - SAS and diesel fuel, contains highly oxidised high-melting bitumen in the form of 30-40% of solution in xylol or mixture of xylol and diesel fuel with content of xylol in the solvent of 50 to 99%, ABR water-repellent agent as SAS, and in addition rape oil, clay powder or marble, or their mixture in the ratio of 1:1 at the following component ratios, wt %: the above solution of highly oxidised high-melting bitumen 40-75, rape oil 15-40, ABR water-repellent agent 2-5, diesel fuel 0-20, clay powder or fine marble, or their mixture 0-30.
EFFECT: simpler preparation technology of a solution under field conditions and shortening the time required for its preparation at maintaining all its parameters.
3 ex, 3 tbl
FIELD: oil and gas industry.
SUBSTANCE: clay drilling mud contains the following, wt %: clay powder 5.5, carboxymethyl substance 0.5, ferrochrome lignosulphonate 0.2-0.3, arabinogalactan 0.2-0.3, water 93.4-93.6; as carboxymethyl substance, it contains carboxymethyl amylose in the form of commercial product Polycell KM K BUR 1N containing the following, wt %: carboxymethyl amylase 70-75, NaCl 15-18 and sodium glycolate 10-12.
EFFECT: control of rheological characteristics and filtration ability of drilling mud considering characteristics of drilled rocks.
2 cl, 1 tbl, 9 ex
SUBSTANCE: copolymer contains as monomer components, a) at least one compound which contains a sulphonic acid group, b) at least one compound selected from a group comprising N-vinyl-caprolactam, N,N-dimethylacrylamide, N,N-diethylacrylamide, isopropylacrylamide, N-vinylpyrrolidone, N-vinylacetamide, N-vinylformamide, N-methyl-N-vinylacetamide, N-alkylacrylate and N-alkylmethacrylate, and c) at least one bifunctional vinyl ester selected from: divinyl ester of triethylene glycol, divinyl ester of diethylene glycol or divinyl ester of butanediol. Also disclosed is use of the copolymer as an additive to hydraulic binders and/or compositions containing components that swell in water.
EFFECT: copolymer is sued as water-retaining or anti-segregation agent.
10 cl, 12 tbl, 20 ex
SUBSTANCE: drill pipe includes a polymer basic structure formed of bismaleimide polymer reinforced with fibres; and a hydrophobic coating including a maleimide complex and chemically connected to polymer basic structure. The coating forms a covalent link with polymer basic structure. A drill pipe erection method involves erection of the basic structure of the drill pipe from polymer material; production of hydrophobic coating; and creation of covalent chemical link between the coating and the basic structure. The coating for application onto the drill pipe is made of many layers, at least one of which is made from the material containing a chemical reagent chosen for a reaction in presence of borehole fluid media that have destructive nature in relation to polymer material.
EFFECT: providing formation of a coating on the drill pipe, which is adequately connected to the below-lying basic structure of the polymer material so that it can withstand corrosive medium present in the borehole application.
30 cl, 10 dwg
FIELD: oil and gas industry.
SUBSTANCE: magnesium silicate proppant obtaining method involves preparation of initial charge, its introduction to the composition of a pore-forming additive, crushing, formation of granules, their drying and annealing, which differs by the fact that to the charge there additionally introduced is sintering additive in the form of water-soluble salt of mineral acid that is dissolved in liquid used at granulation, and pore-forming additive in the form of water non-soluble substance is introduced to the charge at the grinding charge; with that, sintering and pore-forming additives are in the following ratio, % above the charge mass: pore-forming additive 0.005-3.0, sintering additive 0.2-2.5.
EFFECT: reduction of proppant density at strength retention.
3 ex, 1 tbl
FIELD: oil and gas industry.
SUBSTANCE: proposed composition for changing water permeability of an underground formation includes expandable polymer microparticles with an average diameter of nonincreased volume of 0.05 to 5000 mcm, which consist of structured polymers that include labile linking agents and are chosen of a group consisting of star-shaped polymers, dendrite polymers, with hyperbranched polymers, polymers with short-chain branching, polymer with long-chain branching and any of their combinations, as well as include soldium acrylamide and acrylamidomethyl-propane sulphonate. Besides, the proposed method of variation of water permeability of an underground formation involves pumping of the above composition to the underground formation.
EFFECT: proposed composition due to enlargement of volume of polymer microparticles allows effective variation of permeability of underground formations and improvement of mobility or production rate of hydrocarbon fluids present in formations.
16 cl, 4 dwg, 7 ex
FIELD: oil and gas industry.
SUBSTANCE: stabilised emulsion composition includes oily fluid medium, fluid medium being at least partially non-mixed with oily fluid medium, and emulsion-stabilising agent containing the first ionic compound soluble in oily fluid medium or the above fluid medium, and the second ionic compound with a charge with an opposite sign relative to the first ionic compound. The proposed method involves production of the above composition of stabilised emulsion and its placement into an underground formation as a part of underground work. The method involves production of the above composition and drilling of a well in the underground formation using it. The method for obtaining the above composition involves the following: production of oily fluid medium; production of the above fluid medium; production of emulsion-stabilising agent including the first ionic compound, which is soluble in oily fluid medium or the above fluid medium, and the second ionic compound with the charge with opposite sign relative to the first ionic compound, and combination of oily fluid medium, fluid medium and stabilising agent with formation of composition.
EFFECT: improvement of emulsion stability and reduction of the stabilising agent amount.
17 cl, 1 tbl