Gas-generating fuel for downhole apparatus |
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IPC classes for russian patent Gas-generating fuel for downhole apparatus (RU 2395482):
Method of making mixed solid fuel charge / 2395479
Invention relates to technology of making charges from mixed solid fuel. The method of making a mixed solid fuel charge involves grinding, fractionation and mixing different fractions of an oxidising agent, preparation of a mixture of binder with metallic fuel and additives, preparation of a mixture of hardener components and preparation of a fuel mixture, moulding, polymerisation, pressing and flaw detection of the charge. At the step for preparing a mixture of binder with metallic fuel and additives, rubber - oligomer polyvinyl isoprene urethane with terminal epoxy groups is divided into two portions. One portion of the rubber and a polymer chain extension - aniline is used to prepare a semi-finished product and is mixed with the second portion of the rubber and components of the mixture of binder with additives.
Gas-generating composition for producing breathable gas / 2394801
Invention relates to pyrotechnics. The gas-generating composition for producing breathable gas contains silicon as fuel, cellulose nitrate or sodium metasilicate, or magnesium cement as binder, oxidising agent which forms nitrogen in combustion products, in form of nitrates of alkali or alkali-earth metals or their mixture with potassium perchlorate or ammonium perchlorate in ratio which ensures absence of hydrogen chloride in the combustion products.
 Method of making articles from mixed solid rocket fuel / 2394011
Invention relates to technology of making articles from mixed solid rocket fuel. The method of making articles from mixed solid rocket fuel involves moulding articles into a case through pressure moulding of fuel mass on a continuously running installation with auger unloading, holding the moulded articles under pressure during operation of the auger with simultaneous cooling of the fuel mass in the auger by feeding a heat carrier into the housing of the auger, cutting off the fuel mass in the case using a cutter and press curing. Cooling of fuel mass in the auger feeding heat carrier into the housing of the auger begins 3-20 minutes before the end of moulding the article. After ageing of the moulded article, pressure in the case of the article is established in accordance with a mathematical formula by smoothly varying rotational speed of the auger. Further, without changing the rotational speed of the auger, the cutter is closed and after 0.5-1.0 minutes, rotational speed of the auger is smoothly reduced to zero and the auger is switched off. The stroke speed of the piston of the cutter during its closure is preset at a value not greater than 0.15 m/min.
 Solid fuel low-temperature gas-generating composition / 2393140
Invention relates to solid fuel gas-generating compositions. The solid fuel low-temperature gas-generating composition contains ZV ammonium nitrate, guanylurea dinitramide and methylpolyvinyltetrazole.
 Gas-generating fuel for downhole apparatus / 2393139
Invention relates to gas-generating solid fuels. The gas-generating fuel for downhole apparatus contains ammonium perchlorate as an oxidising agent, synthetic hydrocarbon rubber plasticised with hydrocarbon oil as fuel, lecithin, epoxy resin, ortho-tert-butyl-para-cresol or tertiary butylphenol as a processing additive, paradinitrosobenzene or quinol ether as a curing agent, ammonium chloride as a gas-generating additive. The synthetic hydrocarbon rubber used can be isoprene, butadiene, ethylenepropylene, isoprenedivinyl or butyl rubber and the hydrocarbon oil can be transformer, aviation or industrial oil.
Low-temperature solid propellant / 2389714
Invention relates to making gas-generating low-temperature solid propellants. The low-temperature solid propellant contains ammonium nitrate as an oxidising agent, SKDM-80 rubber as polymer fuel, di-N-oxide-1,3-dinitrile-2,4,6-triethylbenzene as a hardener and dinitrophenoxyethanol as a combustion rate catalyst.
Gas generating composition / 2388737
Invention relates to gas generating compositions for use in various mechanisms working under the effect of compressed gases. The gas generating composition contains 50-60 wt % calcium nitrate, 15-16 wt % melamine and 24-35 wt % sodium bicarbonate.
 Manufacturing method of charge from ballistic solid propellant / 2384555
Manufacturing method of charge from ballistic solid propellant (BSP) involves mixing of fuel components containing solid additions in water medium, pressing of fuel mass, rolling, pelletisation of fuel mass, drying of fuel pellet and pressing of charge with a through method. Solid additions are dosed for fuel components to be mixed in the form of pre-prepared water suspension; at that, water suspension of solid additions is prepared at temperature of 15…35°C, and the ratio of solid additions: water within 1:3…1:5 and introduction of sulphoricinate E in quantity of 0.10…0.25 wt % in relation to fuel mass.
Ballistic solid rocket propellant / 2384553
Ballistic solid rocket propellant includes combustion modifying agent which consists of lead copper complex of phthalic acid or nickel lead complex of phthalic acid as combustion catalyst, chrome (III) - copper (II) - oxides or dioxides of titanium, or titanium disilicide, or calcium carbonate as combustion stabiliser, technical carbon and 1,2-dibutoxybenzol. Combustion catalyst is included in the propellant in quantity of 1.5-4.0 wt %, combustion stabilising agent 0.4 - 3.0 wt %, technical carbon 0.1 - 1.0 wt %, 1,2-dibutoxybenzol - 0.5 - 2.0 wt %.
 Method for manufacturing of item from mix solid rocket propellant / 2382017
Method for manufacturing of item from mix rocket solid propellant (MRSP) includes moulding of item, execution of staged hardening of item under pressure by means of coolant temperature variation and item cooling. Item is hardened at initial stage at the temperature of coolant 5-15°C below temperature of the main hardening mode for 10-20% of overall hardening duration, and then in the main mode at the temperature of 60 - 80°C. Cooling is carried out at coolant temperature of 10 - 35°C and duration (τcooling, hr), defined by formula τcooling=0.61 Taverage + 0.65, where Taverage is actual average coolant temperature, °C.
 Thermoplastic gas-generating high-power pyrotechnic composition / 2394800
Invention relates to pyrotechnics. The thermoplastic gas-generating pyrotechnic composition contains binder - a mixture of a copolymer of butadiene and nitrile of acrylic acid with phenol-formaldehyde resin and an oxidising agent - ammonium perchlorate at a defined ratio of components. The composition can be used to carry out work in actuating mechanisms of pyro-automatic devices.
Gas-generating fuel for downhole apparatus / 2393139
Invention relates to gas-generating solid fuels. The gas-generating fuel for downhole apparatus contains ammonium perchlorate as an oxidising agent, synthetic hydrocarbon rubber plasticised with hydrocarbon oil as fuel, lecithin, epoxy resin, ortho-tert-butyl-para-cresol or tertiary butylphenol as a processing additive, paradinitrosobenzene or quinol ether as a curing agent, ammonium chloride as a gas-generating additive. The synthetic hydrocarbon rubber used can be isoprene, butadiene, ethylenepropylene, isoprenedivinyl or butyl rubber and the hydrocarbon oil can be transformer, aviation or industrial oil.
 Method for fabrication of ammonia perchlorate containing hydrophobisated fraction / 2363690
Invention refers to the fabrication of ammonia perchlorate for composite solid propellant. The fabrication method of ammonia perchlorate containing the hydrophobisated fraction includes the preparation of the hydrophobizated fraction with specific surface area from 5400 to 7300 cm2/g having alkylsiloxane coating with mass content from 0.11 to 0.25 wt %, addition of the said hydrophobizated fraction to ammonia perchlorate in the amount of 1.5 to 77 wt % and mixing in the drum mixer having cylinders with height and diametre 30-40 mm made from elastic polyurethane. The hydrophobizated fraction of ammonia perchlorate is fabricated and packed to the bags with calculating of the arithmetic mean of the alkylsiloxane content in the fabricated bags round to the nearest hundredths. The hydrophobizated fraction used for addition to ammonia perchlorate has alkylsiloxane content departure from arithmetic mean value no more than ±0.01 wt %.
Process of preparing micronized ammonium perchlorate / 2310635
Invention provides micronized ammonium perchlorate for mixed propellant comprising preparation of lecithin solution in dispersion liquid, preparation of ammonium perchlorate slurry in this solution, and reduction of slurry in bead mill in presence of glass beads. Solution of lecithin in dispersion liquid is prepared via dissolution of lecithin in 2.7-15.0% of the total amount of dispersion liquid, filtration of resulting solution, addition thereof to the rest of dispersion liquid, and stirring. As dispersion liquid, fluorodichloroethane is utilized. Reduction of slurry in bead mill is carried out at temperature not exceeding 25°C.
 Method of hydrophobization of ammonium perchlorate / 2287510
The invention is pertaining to the process of production of the blasting explosives. The invention presents the method of hydrophobization of the ammonium perchlorate including the treatment of ammonium perchlorate with the oil-wetting agent - methyltrichlorosilane vapor-phase in two stages. At the first stage ammonium perchlorate is mixed with ammonium bicarbonate, and the gained mixture is ground at simultaneous feeding of the oil-wetting agent. At the second stage the produced ground mixture is averaged and mixed with ammonium bicarbonate and treat with the oil-wetting agent. Process of hydrophobization at the second stage is completed at pH of the gaseous products of no less than 6. The invention allows to reduce consumption of the oil-wetting agent.
Method for decreasing volatility of carboxylate rubber-base solid-propellant compositions of liquid ferrocene compounds and high-modulus carboxylate rubber-base solid-propellant composition and liquid ferrocene-containing catalytically active plasticizer / 2276162
Invention relates to using ferrocene-containing catalytically active plasticizers in high-modulus solid-propellant composition for different designations possessing the enhanced exploitation stability and broadly regulated range of the combustion rate. The composition comprises the following components: 60-80 wt.-% of oxidizing agent, for example, ammonium and potassium nitrate or FPCh; 2-20% of aluminum; 5-15% of liquid carboxylate rubber; 1.5-3.5% of epoxy resin, for example, epoxydiane resin ED-20 or resin EC-N; 0.01-4% of liquid ferrocene compound; 0.5-3.5% of co-plasticizer, transformer oil and/or DBS; 0.05-0.5% of hardening accelerating agents, and 0.01-0.2% of surface-active substances. Method for preparing high-modulus solid-propellant composition of reduced volatility of liquid ferrocene compound involves preliminary dissolving the ferrocene compound in co-plasticizer in the mass ratio = (20-80):(1-99) followed by plasticizing a polymeric binding agent and its mixing with surface-active substance, aluminum, oxidizing agent and hardening accelerating agents. Invention provides enhancing the strength properties of the composition.
 Ammonium perchlorate preparation method / 2246472
Invention proposes a method for preparation of ammonium perchlorate for compounded solid rocked fuel, which is characterized by preparation of coating solution in liquid carrier via dissolution of lecithin in trifluorotrichloroethane or methylene dichloride, preparation of ammonium perchlorate suspension from ammonium perchlorate and above-prepared solution, breakage of suspension by means of glass beads on two twin mills during 1 to 10 h until ammonium perchlorate having particle size 2.0 to 1.0 μm is obtained in case of batch operation mode and during 8 to 16 h to ammonium perchlorate particle size 1.0 to 0.55 μm in case of stepwise charging of lecithin at 3 h intervals, and drying. When number of dead mills and working room of mixer are changed, breakage time is found with the aid of special formula.
 Method of waterproofing ammonium perchlorate / 2211207
The invention relates to techniques for preventing caking powdery water-absorbing materials, namely inorganic oxidizing agents used in the manufacture of composite solid rocket propellant and pyrotechnic compositions
 Explosive composition multifactor actions increased power / 2209806
The invention relates to explosive compositions and can be used in almost any munitions
 The gas-generating heat-resistant fuel for downhole devices / 2182147
The invention relates to the field of creation of solid fuels intended for use as the working fluid in the downhole apparatus (powder-pressure generator (PGD), the pressure accumulators wells (SBP) and others)
Ammonium perchlorate preparation method / 2246472
Invention proposes a method for preparation of ammonium perchlorate for compounded solid rocked fuel, which is characterized by preparation of coating solution in liquid carrier via dissolution of lecithin in trifluorotrichloroethane or methylene dichloride, preparation of ammonium perchlorate suspension from ammonium perchlorate and above-prepared solution, breakage of suspension by means of glass beads on two twin mills during 1 to 10 h until ammonium perchlorate having particle size 2.0 to 1.0 μm is obtained in case of batch operation mode and during 8 to 16 h to ammonium perchlorate particle size 1.0 to 0.55 μm in case of stepwise charging of lecithin at 3 h intervals, and drying. When number of dead mills and working room of mixer are changed, breakage time is found with the aid of special formula.
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FIELD: chemistry. SUBSTANCE: invention relates to solid gas-generating solid fuels. The gas-generating fuel for downhole apparatus contains ammonium perchlorate as an oxidising agent, synthetic hydrocarbon rubber which is plasticised with hydrocarbon oil in mass ratio of 1:1…1:5 as fuel, aluminium, process additives, a vulcanising agent and ammonium chloride as a gas-generating additive. EFFECT: design of solid gas-generating fuel with high content of hydrogen chloride in combustion products, high energy output and large specific volume of generated gases. 1 tbl
The invention relates to the field of creation of solid fuels for use in downhole devices (powder-pressure accumulators wells DT, powder generators pressure PGD and others) for temperature and chemical effects on the bottomhole zone with the aim of increasing the productivity of oil wells. There are various solid fuels that can be used in the downhole apparatus. This fuel-based fluorinated elastomer (U.S. patent No. 3203843 NCI 149-19 declared 24.01.62; Russia's bid No. 2001101664/03 to the invention, the IPC E21B 43/27, 43/25, declared 17.01.2001), polycellulose binder (patent Sweden No. 323842, MKI C06D 5/06 declared 25.07.65.), polyacrylic rubber (U.S. patent No. 3152027, NCI 149-83 declared 25.05.62.), ethylene propylene diene monomer rubber (patent of Russia №2182147 IPC C06D 5/06, C06B 29/22 declared 5.04.2000), the best choice of thermoplastic elastomer (patent of Russia №2183609 IPC C06D 5/06, C06B 29/22 declared 5.04.2000). Lack of fuel under U.S. patent No. 3203842, 3152027, 323842, the invention application EN 2001101664/03 is a relatively low energy intensity, the presence of combustion products or highly corrosive hydrofluoric acid, which causes corrosion of the equipment and reduced quality of oil or condensed products of combustion (e.g., silicon), causing erosion, clogging oil field equipment, and the reduced permeability of rocks in oil reservoir, or low content in the combustion products hydrogen chloride. Hydrogen chloride is a chemical agent, effectively depleting reservoir sediments and flooded wells, saturating downhole fluid, it forms hydrochloric acid, which dissolves the formation of deposits, thereby increasing the effectiveness of impact on bottom-hole zone of the well. Low content in the combustion products hydrogen chloride takes place in counterparts (patents No. 2182147, 2183609). The closest adopted for the prototype, is the fuel (patent of Russia №2182147, IPC C06D 5/06, C06B 29/22 declared 5.04.2000, publ. 10.05.2002) based on ethylene-propylene rubber, plasticized aviation oil containing perchlorate ammonium and/or potassium as the oxidant. The main disadvantage of the prototype is not sufficiently high specific volume of hydrogen chloride released during the combustion of fuel and, as a result, low concentration of the formed hydrochloric acid, which is an effective chemical agent, a solvent reservoir deposits of various types. An object of the invention is to develop a gas-generating fuel for the downhole apparatus, the combustion products which provide not only temperature, but also the chemical impact on the bottom zone of the wells is due to the presence of large quantities of hydrogen chloride and/or hydrochloric acid. The technical result is achieved due to the rational choice of components and establish the optimal of their content in the composition. The proposed gas-generating fuel for a downhole apparatus, comprising the oxidizer ammonium perchlorate, metal fuel is aluminum, fuel, gas-generating additive, curing agents and processing AIDS. The ratio of the components in the proposed fuel the following, wt%:
As a combustible gas-generating fuel contains synthetic hydrocarbon rubber is isoprene or butadiene, or ethylene propylene diene monomer, or izoperedvizhnoy, or butyl rubber in a mixture with a hydrocarbon oil - transformer, or aircraft, or industrial in the ratio of rubber: oil -1:1...1:5. In to the amount of gas-generating additive, increases as the relative amount of gaseous products of combustion, and the content of hydrogen chloride, the proposed gas-generating fuel comprises ammonium chloride. As technological additives proposed gas-generating fuel contains, wt%: 0,1...0,3 lecithin, 0,2...1,5 epoxy resin, 0,5...1,5 ortho-tert-butyl-para-cresol or tertiary butylphenol, and as a vulcanizing agent 0,2...1,0 wt.% paranitrophenol or finalborgo ether. The essence of the invention is illustrated by the examples in the table. Data are at well pressure 50 MPa. The fabrication process of the proposed gas-generating fuel is consistent mixing synthetic hydrocarbon rubber (hydrocarbon oil and metal fuel is aluminum, technological additives, gas-generating additive, an oxidizing agent, vulcanizing agent, the mixing at a temperature of 40...60°C during 1,0...1,5 hours without vacuum and 0,5...1,0 h under vacuum, followed by press-fitting in the body and polymerization at 60...90°C for 3...8 days.
As can be seen from table, the combustion of 1 kg of the proposed gas-generating fuel stands about 875...1077 liters of gaseous products. The combustion products by offering the CSOs gas-generating fuel has a high content of hydrogen chloride, reaching level 236 liters. In terms of flooded wells during the combustion of each kilogram of the proposed gas-generating fuel is formed in terms of a 20%concentration of 1.25...1,92 kg of hydrochloric acid. The intensity of the proposed gas-generating fuel and reaches high level 115800 kgf·m/kg, the Temperature of the combustion products is 1439...C. The reduction in the content of ammonium perchlorate in the composition of the gas-generating fuel below 46% leads to a decrease of the temperature of products of combustion and energy intensity. When the content of the oxidizing agent more than 83% reduction in specific volume of the combustion products and the concentration of hydrogen chloride. The increase of the content in the gas-generating fuel fuel, which simultaneously performs the role of a binder, more than 20% leads to a decrease of the intensity and temperature of the combustion products. When the content of combustible binder in the composition of the gas-generating fuel less than 10% worse technological characteristics of mass, which can affect the quality of produced from it products. The reduction in the content of hydrocarbon oils in the composition of the combustible binder is less than 1 part oil to 1 part of synthetic rubber, will lead to the deterioration of the technological characteristics of the mass. Big oil content of the binder is more than 5 parts oil to 1 part of sinteticheskogo - reduces the content of the latter in the gas-generating composition of the fuel, which leads to the deterioration of its mechanical characteristics. When the content of ammonium chloride is less than 5% decreases the number of hydrogen chloride in the combustion products. The content of ammonium chloride in excess of 30%, entails reducing the temperature of the combustion products and the fuel consumption. When the content of aluminum is less than 1% reduction of energy consumption, while increasing its more than 10%, a large amount of the condensed phase. Thus, the proposed fuel exceeds the prototype on the content of hydrogen chloride in the combustion products while maintaining a high level of intensity and specific volume of the gases generated. The gas-generating fuel for a downhole apparatus, comprising the oxidizer is ammonium perchlorate, metal fuel is aluminum, fuel - synthetic hydrocarbon rubber, plasticized hydrocarbon oil, process additives - lecithin, epoxy resin, ortho-tert-butyl-para-cresol or tertiary butylphenol, vulcanizing agent - paranitrophenol or henology ether, characterized in that it additionally contains ammonium chloride as a gas-generating additive, as a synthetic hydrocarbon rubber is isoprene or butadiene, or ethylendiamin enemy, or izoperedvizhnoy, or butyl rubber, and as a hydrocarbon oil - transformer, or aircraft, or industrial oil at a ratio of synthetic hydrocarbon rubber and a hydrocarbon oil 1:1...1:5 in the following ratio, wt.%:
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