Method of decontaminating highly mineralized drilling wastes and plant for its implementation

FIELD: mining; processing and recycling of wastes.

SUBSTANCE: group of inventions relates to a plant for decontamination of highly mineralized drilling wastes containing oil products, heavy metals, synthetic surfactants and other contaminants based on introduction of a hardening composition and a method implemented with using it. Plant includes pumps, pipelines, a unit for receiving and washing drilling wastes, a unit of coarse mechanical treatment, a reagents preparation and dispensing unit, a unit for cleaning the contaminated brine, a fine mechanical treatment unit, a container for temporary storage of the clarified brine. Plant additionally contains an inertization unit, a mixing module of which is equipped with a bottom gate to discharge the hardened material and is connected via the main line to the coarse mechanical treatment unit, the unit for cleaning the contaminated brine and the fine mechanical treatment unit. Included in the unit for receiving and washing the drilling wastes mixing container is equipped with a blade mixer, a loading funnel and is provided with a hydrodynamic disperser. All units of the plant are integrated with the help of frames and metal structures and can be based on a welded frame of a two-axle trailer. Treatment of the drilling wastes is performed by inertization after washing from salts to obtain washed drilling mud of the contaminated brine followed by thorough mechanical stirring for 2–3 minutes of the drilling mud with the hardening composition of not less than 20 wt%. based on a binder cement of grade PC M-500 of 40–80 wt%. and a fine active sorption additive – gaize of 20–60 wt%. at the humidity of 40 %. Then a hardening activator solution is added, as which used is 20 % liquid glass in the amount of 10–20 % of the dry hardened material, and is thoroughly stirred for 5–7 minutes. Contaminated brine is directed for multistage cleaning by coagulation, flocculation and centrifugation to form a solid phase sent for inertization.

EFFECT: group of inventions provides decreased negative environmental load on natural objects.

2 cl, 2 tbl, 1 dwg



Same patents:

FIELD: oil and gas industry.

SUBSTANCE: dry mixture for makeup of well-killing fluid containing industrial powdered lignin sulphonate, biopolymer of xanthane gum and bone glue with the following ratio of ingredients, wt %: the above lignin sulphonate 86.7-90.0, biopolymer of xanthane gum 9.5-12.5, bone glue 0.5-0.8.

EFFECT: improving impermeable properties of the well-killing fluid made of dry mixture having high stability during storage due to excluded caking and lumping, ensuring potential regulation of density of the well-killing fluid, reducing time and simplifying technology of well-killing fluid makeup of non-critical reagents, reducing time for well development, potential usage of the well-killing fluid at low climatic temperatures, expanding range of reagents, saving transportation costs.

2 cl, 1 tbl

FIELD: agriculture.

SUBSTANCE: method comprises deep loosening of soil, application of fertilizers and ferrous sulphate solution, and watering with increased irrigation rate. At that as the fertilizer the urea formaldehyde fertilizer is applied in the topsoil, which is saturated with ferrous sulphate solution and encrusted with phosphogypsum. After completion of washing the fertilizer is moved to the lower part of the ploughed horizon.

EFFECT: efficient desalination of irrigated saline soils with improvement of soil structure, increase in soil fertility and erosion resistance without damaging the surrounding area and plants.

FIELD: oil and gas industry.

SUBSTANCE: cement slurry contains 46.0-75.0 wt % of binding material and as such portlandcement of packing class G or cement mix Micro TSS BTRUO or a mix of aluminous cement GTS-40 and microcement Micro TSS BTRUO in mass ratio of 3:7, or a mix of aluminous cement GTS-40 and portlandcement PTST 50 in mass ratio of 1:4 is used; 1.0-4.0 wt % of surfactant and as such a mix of emulsifying agent MR-150 is used with calcium alkyl benzosulphonate and emulsifying agent OP-4 in mass ratio of 1:4:9; or a mix of emulsifying agent MR-150 is used with calcium alkyl benzosulphonate, water-repellent agent ABR and Neftenol VKS-N in mass ratio of 4:4:3:3; 9.0-27.0 wt % of diesel fuel; 0.0-0.5 wt % of calcium chloride; 0.0-2.0 wt % of condensed microsilica MK-85 and fresh water - the remaining share.

EFFECT: improved fluidity, reduced water loss, improved strength and durability of cement stone.

2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to compositions and methods of wellbore processing. A composition for wellbore cleaning contains, wt %: solvent 10-45; cosolvent 10-40; hydrophilisating surface-active substance 5-10; purifying surface-active substance 5-20; non-ionogenic surface-active substance 1-10; non-ionogenic auxiliary surface-active substance 1-5; emulsifying surface-active substance 1-5; water liquid 1-5.

EFFECT: improvement of cement binding in the annulus space between the case pipe and the rock surface.

14 cl, 4 ex, 4 tbl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention relates to compositions for wells treatment for use in oil industry. Composition for well treatment containing chemical for well treatment adsorbed using water-insoluble adsorbent, where composition is produced by the well treatment chemical deposition from liquid, at that the well treatment chemical is adsorbed on the water-insoluble adsorbent, and where the well treatment chemical is deposited upon metal salt presence. Well treatment liquid containing the above mentioned composition and carrying liquid. Method of the underground reservoir or wellbore treatment including the above mentioned well treatment liquid injection in the reservoir or wellbore. Method to monitor the well treatment chemical release in the wellbore including the above composition injection in the wellbore. Invention is developed in subclaims.

EFFECT: improved efficiency of treatment in environments with high pH.

38 cl, 3 dwg, 4 ex

FIELD: oil and gas industry.

SUBSTANCE: lightweight plugging material contains cement PTsT-I-100, lightweight - expanded vermiculite, technical salt, chemical agent Crep, at the following ratio in wt %: cement PTsT-I-100 - 84.75; vermiculite - 9.42; Crep - 1.13; NaCl - 4.7. During the cement slurry preparation - expanded vermiculite, technical salt.

EFFECT: exclusion of the hydraulic fracture during wells cementation due to improved parameters of the packing cement, increased strength of cement stone at low and moderate temperatures at early stage of solidification upon simultaneous density reduction of the cement slurry.

1 tbl

FIELD: chemistry.

SUBSTANCE: reagent for treating drilling mud contains 94-96 wt % ferrochrome lignosulphonate and 4-6 wt % ammonium polyphosphate.

EFFECT: improved dilution properties of the reagent in salt mud, high thermal stability and environmental safety of the reagent.

3 tbl

FIELD: oil and gas industry.

SUBSTANCE: invention mainly relates to methods of hydrocarbons production from hydrocarbons containing reservoirs. Method of treatment of the reservoir containing crude oil including stages when: (a) composition is supplied to extract the hydrocarbons to at least part of the reservoir, at that the composition contains at least two internal olefin sulphonates selected from group comprising internal C15-18-olefin sulphonates, internal C19-23-olefin sulphonates, internal C20-24-olefin sulphonates and internal C24-28-olefin sulphonates, and at least one viscosity decreasing compound, that is isobutyl alcohol, ethoxylated C2-C12-alhohol, 2-butoxyethyl, butyl ether of diethylene glycol or their mixture, and (b) composition is provided with possibility to react with the reservoir hydrocarbons. Invention also relates to method of viscosity decreasing of composition of highly active surface-active substance and composition for hydrocarbons extraction.

EFFECT: result is creation of more effective method of hydrocarbons extraction from crude oil containing reservoir.

14 cl, 2 dwg, 2 tbl, 2 ex

FIELD: oil and gas industry.

SUBSTANCE: method of acid treatment of bottom-hole zone of carbonate reservoir includes injection of the acid composition containing in wt %: inorganic or organic acid, or their mixture 9.0-24.0; zwitterion surface-active substance - oleinamidopropylbetaine 1.0-10.0; hydrophobically-modified polyurethane polymer 0.05-3.0; water - rest, at that the acid composition is injected by single stage or by portions with holding between injections. The acid composition can additionally contain anionic surface-active substance in amount of 0.1-3.0 wt %. The above specified acid composition is injected alternating with injection of hydrochloric acid at 12-24% concentration.

EFFECT: alignment of profile of inflow of the production wells in carbonate reservoirs with non-uniform permeability, creation of new fluid conducting channels through entire perforated thickness of the reservoir, restoration of reservoir characteristics of bottom-hole zone due to its cleaning of mud solid particles.

3 cl, 1 tbl, 16 ex, 4 dwg

FIELD: oil and gas industry.

SUBSTANCE: method of water production zone isolation in a well involves sequential injection of coagulation agent (25% solution of calcium chloride), buffer layer of fresh water, and Givpan acrylic reagent. Additionally, polyethylene terephthalate production waste product, PET with low polymerisation degree, is added to Givpan as a filler in amount of 18-24 wt %.

EFFECT: reduced core permeability.

1 dwg, 7 tbl, 3 ex

FIELD: agriculture.

SUBSTANCE: molybdenum-containing industrial wastes are used for growing peas on sod-podzolic soil. The molybdenum-containing wastes are applied in the soil prior to sowing peas in the mixture with bird droppings in a ratio of 1:5.

EFFECT: increase in the yield of green mass of peas with simultaneous disposal of industrial wastes and providing environmental safety.

2 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to chemical industry. The method comprises the following steps: performing pyrolysis of rubber granulates at 400-500°C in the presence of liquid water to obtain a carbonised substance and a gas phase and then collecting the carbonised substance.

EFFECT: invention enables to obtain pyrolysis products of good quality and direct use.

5 cl, 3 dwg, 6 tbl, 2 ex

FIELD: medicine.

SUBSTANCE: invention relates to the field of sterilisation and can be used for the sterilisation of infected wastes. The machine for the sterilisation of infected wastes contains permeable for microwaves tanks, placed in a sterilisation chamber, provided with holes, spaced apart and connected with waveguides, directed from magnetrons, and contains means for giving the said tank for wastes of rotation around its axis. The sterilisation chamber is made in the form of an open downwards bell, which can be hermetically closed with the base construction, which carries means for capturing and rotation of the tank, filled with wastes. The tank can be moved from the lower position for tank filling and discharge into the lifted position for closing the said chamber and for the introduction of the full tank into the sterilisation chamber. The tank is provided with means for its detachable support with gripping and rotating means of a mobile construction of the sterilisation chamber base and for its gripping with manipulating means (SM), which move the tank between different working stations of the machine.

EFFECT: invention provides a possibility of sterilising infected wastes in a completely automated way.

11 cl, 13 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to hydrothermal treatment of biomass. Proposed method comprises the feed of biomass-based stock to reaction area. Stock water-to-biomass ratio makes at least 1:1. Note here that biomass-based stock contains phosphorus while stock hydrothermal processing is conducted under conditions efficient for hydrothermal processing with yield of multiphase product. The latter includes a fraction of solid particles containing about 80% of phosphorus of its content in said stock. Molar ratio between phosphorus and carbon of said fraction of solid substances makes at least 0.2. Said multiphase product is separated to get at least one gas-phase fraction, liquid hydrocarbon product and fraction of solid substances. Invention claims also the versions of process implementation.

EFFECT: efficient process, production of liquid hydrocarbon product.

27 cl, 1 tbl, 2 dwg, 5 ex

FIELD: chemistry.

SUBSTANCE: group of inventions relates to environmental science. Recycling of diapers, sanitary pads and similar sanitary products, containing cellulose, a granular adsorbent and polymer materials, is carried out by first pre-grinding into particles with maximum size of 5-20 mm and separating, from the obtained particles on a vibrating screen, particles with size of 0.5-1 mm, preferably the granular adsorbent, particularly sodium polyacrylate. The remaining ground mixture of materials consisting of cellulose, polymer materials and granular adsorbent residues is moulded into blocks or ribbons and used as a substrate for growing fungi, with the following ratio of components, wt %: cellulose 75-85; granular adsorbent 5-15; polymer materials 5-15.

EFFECT: simple technique of recycling sanitary products.

2 cl

FIELD: chemistry.

SUBSTANCE: claimed is application of granulated nickel slag as aquarium soil. Size of soil particles is from 0.5 to 6 mm.

EFFECT: invention extends arsenal of aquarium soils.

3 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of smoke black powder and can be used for the regeneration of potassium nitrate from sweepings of the gunpowder production with an expired storage term. The method includes mixing the smoke black powder to be utilised with water in a tank, heating the mixture to 90-100°C, filtration of a solution of a sulphur-coal mixture and potassium nitrate, crystallisation of the latter with constant cooling of the crystalliser, collection of potassium nitrate crystals, its centrifuging to remove the solution and drying, with the filtration being realised with a working mixer in a heated filter; crystallisation is carried out with mixing the solution by the supply of compressed air; mother liquor, which is formed in the crystalliser is pumped into a tank, heated to a temperature of 90-100°C and used to wash the residue on the heated filter, the obtained solution is re-supplied into the crystalliser and subjected to crystallisation, the precipitated sediment of potassium nitrate is removed, the solution, remaining in the crystalliser, is re-supplied for mixing with the smoke black powder to be utilised. The technical result of the invention consists in an increased output of potassium nitrate, extracted from smoke black powder.

EFFECT: method is simple and makes it possible to use industrial equipment.

1 dwg, 2 ex

FIELD: process engineering.

SUBSTANCE: invention relates to crushing of refrigerators. Refrigerators 12 are loaded into grinding chamber 16 via loading opening 14 and continuously crushed. Crushed material 24 is discharged via unloading opening 26. At grinding process gases originate to contaminate the chamber air. Grinding chamber is purged with air contained therein. For this, preset air volume L1 is forced per unit time via gas line 32 into gas processing device 34. Air volume L4 equal to volume L1 is continuously forced via loading opening 14 into grinding chamber 16. Sid gas line 32 is aligned with discharge opening 26 and gas processing device 34 and coupled therewith. Pressure of preset air volume L1 in grinding chamber 16 and gas lines 30, 40 connected therewith is kept lower than ambient pressure.

EFFECT: nonpolluting process of crushing of refrigerators.

10 cl, 1 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to processing of electrochemical cells and storage batteries. Proposed method comprises mincing of storage battery, removal of case materials, suspending of produced battery suspension in water in foam flotation tank. Foam flotation agent is added to said suspension to bubble said tank by air to produce foam. This allows hydrophobic materials to be trapped by air bubbles and trapped materials to afloat with said trapped materials. Compounds Pb (IV) are separated from compounds Pb (II) in battery suspension in foam flotation tank. Method of separation of materials in wastes of lead-acid batteries comprises extraction of pasted from used battery, suspending of extracted paste in water, addition of foam flotation agent to said suspension including paste and water, bubbling of said tank by gas to get the foam, separation of (PbO2) from other lead-bearing compounds of suspension is said tank.

EFFECT: higher efficiency of separation.

14 cl, 6 tbl, 10 ex

FIELD: machine building.

SUBSTANCE: for solid wastes thermal neutralisation the solid wastes are loaded in drum drier, solid wastes are dried in the drum dryer, the solid wastes are moved from the drum dryer in the drum furnace, they are baked in the drum furnace, gases generated during neutralisation are exhausted, the neutralised solid wastes are unloaded from the drum dryer and drum furnace. The solid wastes are dried and baked by means of heat transfer to them from casings of the drum dryer and drum furnace, respectively. At that the casings are heated in the external heating chambers surrounding the casing of the drum dryer and drum furnace from outside. The suggested device of thermal neutralisation of the solid wastes contains the drum dryer and drum furnace connected by means of the transportation device, each of them has casing and is equipped with the loading chamber, unloading chamber and gas duct to exhaust gases generated during neutralisation. The device is additionally equipped with the external heating chambers surrounding the casing of the drum dryer and drum furnace from outside with possibility of heat exchange.

EFFECT: increased efficiency of neutralisation, reduced quantity of caught sludges or dust in gas cleaning system generated during dust removal of the neutralised gases, reduced power and material consumptions for neutralisation, and overall dimensions and weight of equipment installed in gas cleaning system.

8 cl, 1 dwg

FIELD: processing materials, such as roofing bitumen-containing materials.

SUBSTANCE: waste are ground and loaded in bitumen melting boiler for separation of them from cardboard base in presence of liquid contact heat-transfer agent. During heating, flue gas is evacuated from furnace of boiler through box used for reduction of flue gas pressure via pipe line to gas separator for entrapping and settling of soot. Then gas directed to filtering unit where it is cleaned and is discharged into atmosphere in form of clean air. Molten bitumen and cardboard pulp are extracted from melting boiler and are cooled to temperature not above 140oC, after which cardboard pup is washed in bitumen-dissolving reagent and is used for manufacture of roofing materials and/or materials for furnaces; liquid phase remaining after washing is used as base for production of bitumen varnish; soot is used for manufacture of rubber articles or dye or pigment for paints and varnishes. Plant proposed for realization of this method is provided with gas separator, gas filtration unit and bitumen melting boiler.

EFFECT: optimization of process; enhanced ecological safety; increased productivity; reduced usage of materials.

22 cl, 8 dwg