Well device for dosage supply of reagent

FIELD: mining.

SUBSTANCE: device comprises a container with a breathing hole in which a deformable shell filled with a liquid reagent is placed and a metering peristaltic pump with an elastic tube cooperating with the rotor by means of pressure rollers. The drive of the peristaltic pump is a hydro turbine, the shaft of which is connected through a reducer to the rotor of the peristaltic pump. The hydraulic turbine is covered from below by a sealing element abutting against the wall of the borehole and is brought into rotation by the formation fluid.

EFFECT: reliability of the dispensed feed of the reagent is increased by providing it with an autonomous energy source.

2 dwg



Same patents:

FIELD: oil and gas industry.

SUBSTANCE: method includes the device with chemical location in the wellbore or at tube side of the surface oil production equipment, chemical dissolving by the produced liquid. As device for chemical injection made in form of a container out of sections and secondary regulated dosing devices. Each container section has one or several cartridges with chemical. From ends the cartridge is covered by plugs with regulated primary dosing devices or from one end by blind plug, and from another end by plug with regulated primary dosing devices. The cartridges are secured by the securing devices. The regulated secondary dosing devices are located in that part of the container sections that is created between the regulated primary devices and blind plug of the container section or end of the container section, or another cartridge.

EFFECT: improved dosing, assurance of device production effectiveness, excluded chemical losses during transportation.

2 cl, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: container includes a cylindrical housing with perforations, which is provided with an upper cover plate with a hole, a lower cover plate and filled with a powder-like reagent below the level of perforations with formation of a free cavity. Perforations are located in circumferential rows distributed throughout length of the housing. Perforations in all rows except for the closest row to the upper cover plate are covered with soluble plugs.

EFFECT: improving uniform reagent dosing.

3 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention relates to set of the salt deposit inhibitors and their use to intensify the flow from the oil field. Method of salt deposits inhibiting in oil field includes the stages: a) injection of at least two inlet fluid flows to at least two production zones of the oil production well connected with oil field, or to at least two different oil production wells, from which at least two outlet flows from two zones or wells are combined prior to extraction with the salt deposits inhibitor, containing detected groups and injected to the oil field(s) and/or fluid; at that two different salt deposit inhibitors are used, each of them is intended for each of two zones or wells; these inhibitors contain different detected groups as per their maximum absorption, that are identified by the analytical method for absorption; b) oil displacement, c) extraction of the output fluid flow containing oil, d) measurement of quantities of different inhibitors in the extracted fluid flow by the analytical method for absorption or of the fluid obtained from it, and e) optionally decision of the problem relating with salt deposits creation in the zone or in the well, for which the salt deposits inhibitor is intended, if quantity of the inhibitor is below the specified value, where one of two inhibitors is specified polymer, and another inhibitor is the another specified polymer. Invention is developed in subclaims.

EFFECT: increased inhibiting efficiency.

7 cl, 6 tbl, 10 ex

FIELD: oil and gas industry.

SUBSTANCE: reagent amount is regulated at wellhead by an electric metering pump unit connected to capillary pipeline at the wellhead. During pump landing to the well on s tube string, capillary pipeline end is equipped with adjustable check valve. Capillary pipeline consists of one capillary tube with double-layer wire sheath. Pipe string is landed so that a sprayer is positioned against the reservoir bottom. After landing, the pump is launched, product recovery is started. At the wellhead, recovered product is sampled and analysed for calcium ion content in associated water. Depending on the analysis result, reagents are dosaged and injected over the capillary pipeline to the bottomhole zone. Relevant salt deposition inhibitors are used as reagents in respective amounts. Recovered product is sampled regularly at the wellhead and analysed. If calcium ion content in associated water exceeds 100 mg/L, inhibitor amount dosaged to the capillary pipeline is increased by 10-20% of initial value to achieve calcium ion content in associated water below 100 mg/L.

EFFECT: increased efficiency of sedimentation prevention.

1 dwg, 1 tbl

FIELD: oil and gas industry.

SUBSTANCE: composition contains a surface active substance based on a polymer of ethylene oxide - ITPS 806 reagent grade B 0.1-5.0 wt % and a mixture of aliphatic and aromatic hydrocarbons in the form of ITPS 010 reagent grade A is the rest.

EFFECT: invention provides high dissolving, dispersing and washing activity of a composition in relation to asphaltene-resin-paraffin deposits of a different type, and reduction of oil viscosity in a treated zone.

4 tbl, 4 ex

FIELD: oil and gas industry.

SUBSTANCE: method includes sampling of deposits from oil equipment, identification of a group composition and type for the deposits, a procedure of the preliminary mixing of empty weighing bottles, preparation of 10% petroleum paraffin solutions in these weighing bottles, wherein different hydrocarbons and their composites are used as solvents, bringing the content of the weighing bottles in the drying closet up to a fixed weight. Surveys are performed using petroleum paraffin of the B2 brand, the melting point of pure paraffin and the paraffin upon treatment by different hydrocarbons is determined additionally by differential scanning calorimetry and the efficiency of solvents for asphalt, resin and paraffin deposits is assessed.

EFFECT: improved accuracy of assessment of the reagents efficiency for the removal of the paraffin deposits.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: in the method acid process composition is injected to the well, withheld for reaction with further removal of reaction products from the formation. Before injection of the acid process composition, upon the last running in of tool for washing of the borehole before development a mixture of non-ionic surfactant with sulphamic acid at mass ratio of 0.003-0.005:1 in quantity of 1-3 wt % is introduced to drill mud containing high-molecular compounds and colmatant used for opening and washing of the producing formation. Then, upon the last running out of tool from the well and running in of tubing string the above drill mud is replaced by the acid process composition and the latter is withheld for reaction during at least four hours. The acid process composition consists of the following ingredients, by wt %: peroxide compound 0.5-3.0; sulphamic acid 5.0-10.0; non-ionic surfactant 0.005-0.02; mineralized water takes the remaining share. Density of the above process composition is equal to density of the drill mud used at opening of the producing formation or differs from it less than per 10%.

EFFECT: improved efficiency and producibility of colmatage removal from the bottomhole zone of the producer borehole, including inclined and horizontal wells, upon usage of the process fluid containing high-molecular compounds and colmatants.

7 cl, 4 tbl, 2 ex

FIELD: oil-and-gas industry.

SUBSTANCE: inventions group relates to oil and gas industry. Fluid washing medium for deposits removal from walls of the underground drilled well includes liquid carrier with viscosity close to the water viscosity, and able for pumping along the well wall under turbulent flow mode, and a disperse component dispersed in the liquid carrier and containing spherical particles with size at least 100 micron and density from 0.8 to 1.3 g/cm3; at that the disperse component occupies 1-10% by volume of the fluid. Method of deposits removal from wall of the drilled well includes a stage, when the above mentioned fluid is injected above wall of the drilled well such that a turbulent flow is created in at least deposits zone.

EFFECT: improved annulus cleaning before cement solutions injection or during completion, abrasive cleaning of all soft materials present in annulus, in particular gel-like clay mass and clay cake without use of the additional equipment and without metal parts damage.

10 cl, 5 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to the oil-and-gas industry and can be used for the development of hard-to-extract gas deposits. The proposed method comprises drilling of the main wellbore, running-in of a production string, surveying, drilling of a horizontal section in a productive formation. Note here that the said main wellbore is drilled with a preset inclination angle, encased by the production string with a precut opening in an aluminium shell for drilling and finishing of a smaller-diameter lateral borehole. The wellbore production sections are drilled gently sloping and equipped with appropriate filters. Simultaneously, a dual production string is run-into the main and lateral horizons to be isolated by a packer above the roof of the lower productive horizon to develop separately the horizons by separate production strings. In the well operation, methanol is fed automatically at a preset flow rate in the main wellbore annulus and lateral borehole annulus.

EFFECT: higher efficiency of development.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas industry and can be used for well cleanout. At a wellhead a discharge line is mounted so that it passes through a heat exchanging device tied up with a mobile steam plant and road-tankers with a solvent and a process fluid, which are tied up with the pumping unit. The mobile steam plant and the pumping unit are started simultaneously; the production string and tubing sting run through it are filled with the solvent heated up at the heat exchanging device up to 75-80°C. The solvent temperature at the output from the heat exchanging device is maintained by changes in the capacity of the pump feeding the solvent from the road-tanker at a permanent temperature and consumption of steam generated by the mobile steam plant at its output. Filling with the solvent is made with simultaneous displacement of the well fluid to the oil pipeline. When filling with the solvent is over, steam delivery is stopped to the heat exchanging device and the process fluid is delivered by the pumping unit to the discharge line in a volume of 1.0 m3 and the solvent is pumped to the well. The well is withheld for 4 hours, thereafter a borehole pump is started in a circulation mode, the well operation is started and the used solvent is pumped out to the oil pipeline.

EFFECT: improved efficiency and reliability of treatment, reduced duration of treatment and improved production standards.

1 dwg

FIELD: oil and gas production.

SUBSTANCE: invention is intended to protect inner surface of transmission pipelines against asphalt-tar-paraffin deposits and provides appropriate composition containing 0.5-10% polyvinyl alcohol, 0.01-1% nonionic surfactant (FK 2000 PLUS), and water.

EFFECT: prolonged pipeline protection effect of composition and manifested demulsification activity.

1 dwg, 5 tbl, 5 ex

FIELD: oil and gas production and corrosion protection.

SUBSTANCE: composition according to invention, which can be used for asphaltene-tar-paraffin deposits from bottom zone of formation, discharge pipes, oil-collection reservoirs, and oil-field equipment, contains 1-5 vol % nonionic surfactant: oleic acid, С912-alkyl-phenol, С910-alkyl-phenol, or N-alkyl-3-methyl-5-ethylpyridinum bromide in solvent; 1-5% cationic surfactant: product of reaction of primary and secondary aliphatic amine mixture with industrial-grade dimethyl phosphite; and solvent (Absorbent A) in balancing amount. Composition can also be based on straight-run gasoline containing in this case 10 to 50 vol % Absorbent A.

EFFECT: increased cleaning efficiency in combination with anticorrosive effect and reduced expenses on reagents.

2 cl, 3 tbl, 23 ex

FIELD: oil extractive industry.

SUBSTANCE: compound includes organic acidic reagent and cubic remains of amine production C17-C20, and as organic acidic reagent contains sulphamine acid with following ratio of components in percents of mass: sulphamine acid 20-70, C17-C20 the rest or mixture of sulphamine acid with nitriletetramethylphosphone acid with following ratio of components in percents of mass: sulphamine acid 10-40, nitriletetramethylphosphone acid 25-70, C17-C20 the rest.

EFFECT: higher efficiency.

2 ex, 7 tbl

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes examination of operation well for gas-condensation and periodical cleaning of face-adjacent well area from precipitating hydrocarbon condensate by pumping hydrocarbon condensate solvent into bed, exposure of well for period of condensate dissolution and following removal of received solution from face-adjacent area during well launch, as solvent binary mixture is used with unlimited mutual solubility of components, while at least one of them has unlimited mutual solubility with hydrocarbon condensate, and relation of binary mixture components is determined from previously built phase diagram of three-component system, formed during dissolution of hydrocarbon condensate. As binary mixture with unlimited mutual solubility of components a mixture of acetone and methanol is used, or chloroform and methanol, or chloroform and aniline, or chloroform and acetone.

EFFECT: higher productiveness.

2 cl, 3 ex, 6 tbl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes injection of processing liquid into bed, which liquid contains solved or dispersed in water complicated ether and polymer destructor, selected from oxidizing destructor and ferment destructor in such a way, that complicated ether is hydrolyzed with production of organic acid for solution of material soluble in acid, present in filtering layer or adjacent to it or in other damage in productive bed, and polymer destructor destroys polymer material, present in filtering layer or bio-film in productive bed.

EFFECT: higher efficiency, simplified method, higher productiveness, higher ecological safety.

31 cl, 1 tbl, 1 ex

FIELD: oil industry.

SUBSTANCE: compound has processed cyclohexane fraction, processed tallic or rapeseed oil, additionally has modified high-dispersion polysyl-grade silica with following ratio of components in percents of mass: processed cyclohexane fraction 69.9-78.0, processed tallic or rapeseed oil 20.0-30.0, polysyl 0.1-2.0.

EFFECT: higher efficiency.

3 ex, 4 tbl

FIELD: oil industry.

SUBSTANCE: composition for prevention of asphalt-resin-paraffin precipitations on basis of liquid pyrolysis products, used in amount of 0.03-0.05 of oil mass, has following composition, %: dark oil polymer resin, received by oxidizing polymerization of heavy pyrolysis resin during blowing of air with flow 17-23 hour-1, temperature 145-155°C in presence of cobalt salts during 2-2.5 hours, 30-35, alkylaromatic hydrocarbons 65-70.

EFFECT: higher efficiency.

3 ex, 3 tbl

FIELD: oil and gas production industry, particularly for well thawing.

SUBSTANCE: method involves lowering flushing pipe string of lesser diameter into producing tube; flushing well bore with hot technological solution and lengthening flushing pipes as hydrate ice block damages, wherein potassium chloride electrolyte is used as the technological solution.

EFFECT: increased reliability and efficiency.

FIELD: oil industry.

SUBSTANCE: method includes washing tubing pipes using solvent - condensed light hydrocarbons, produced using centrifugal forces of hydraulic cyclone, with insertion of it through behind-pipe space into said tubing columns and circulation with down-pump operating in towards-self mode. Said solvent contains admixture in form of special surfactant, washing is performed at temperature close to temperature of melting of paraffin with loss of said solvent 5-10 m3 in one well.

EFFECT: higher efficiency, broader functional capabilities.

FIELD: oil and gas production.

SUBSTANCE: reagent contains fraction obtained in processing of liquid products from oil feedstock pyrolysis via rectification of these products within a temperature range of 28 to 150°C at atmospheric pressure and in presence of polymerization inhibitors; and optionally polyalkylbenzene resin in amount 0.5-5.0% separately or in mixture with α-olefin 2.0-8.0%), or with anionic surfactant (0.05-0.2%). Reagent may also further contain 0.5-5.0% α-olefins and 4.0-10.0% butylbenzene fraction. Method of treating well bottom zone comprises injecting hydrocarbon fluid containing above-indicated hydrocarbons, forcing it into formation with buffer liquid, holding it in bottom zone for a wale, and drawing off dissolution products.

EFFECT: enhanced dissolution of asphaltene-tar-paraffin deposits on oil-field equipment and in well bottom zone and prevented re-precipitation of asphaltenes.

EFFECT: 5 cl, 3 tbl