A device for washing the tubing of oil and gas wells
(57) Abstract:The invention relates to the field of exploitation of oil and gas wells, complicated asphalt-resinous and palatinolinotype sediments. The device includes a container and a pump mounted on self-propelled vehicle with accessory equipment and components, and the estuarine rebar tying wells. The composition of the peripheral equipment includes a lubricator with a built-in cork crane, Salnikov seal and a hollow rod, matched with Salnikov seal removable cover with possibility of vertical movement and fixation in the extreme positions. The upper tip of the rod has a stop valve and a connection node of the supply line from the pump. In the extreme upper position of the hollow rod its lower tip is located above the cork crane in the lubricator. In the lowest position of the lower tip is located below the centre of the valve. The lower tip has a nozzle for forming pressurewise stream flowing fluid with a pressure higher than linear. The device allows for the displacement of gas by the liquid after stopping the wells directly by filing a displacing agent through prices is, 1 Il. The claimed technical solution relates to the field of oil and gas production, in particular to devices used for the elimination of asphalt-tar and paraffin-hydrate deposits (ARPD) in wells.The use of organic solvents for the prevention and removal of asphalt-resin-paraffin deposits known in industrial practice field  and has been widely spread. In accordance with  the injection of the solvent is carried out in the annulus and pumped to the complete elimination of paraphysomonas deposits at the end of the pumping volume of the solvent with the purpose of its economy replaces the annular gaseous environment to a dynamic level of the well.A device for dewaxing oil wells by treatment with hot oil, consisting of a heater and pump, mounted on self-propelled vehicle, characterized in that in order to be able to use as coolant oil flow line of the treated wells it is equipped with a separator installed at the inlet of the oil from the flow line bore in the heater the main drawback of the device is that option only direct washing of the wells, this leads to high costs of reagents due to the need to fill the annulus, the volume of which is 5-6 times greater than the volume of the tubing (tubing).The purpose of the proposed technical solution is the reduction of costs and time for the dewaxing of wells.This goal is achieved by the fact that in the device for washing the tubing of oil and gas wells, including the tank, pump, mounted on self-propelled vehicle with accessory equipment and components, and the estuarine rebar tying wells, according to the invention in the composition of the peripheral equipment includes a lubricator with a built-in cork crane, Salnikov seal and a hollow rod, matched with Salnikov seal removable cover with possibility of vertical movement and fixation in the extreme positions, the upper tip of the rod has a stop valve and a connection node of the supply line from the pump, in the extreme upper position of the hollow rod its lower tip is located above the cork crane in the lubricator, and in the lowest position of the lower tip is NOK flowing fluid pressure, greater than linear.The essence of the proposed technical solution is that after you stop the borehole separation of fluids in the Central tube and the deposition of paraffins, as a rule, is in the zone occupied by the gas phase. The inventive device allows for the displacement of gas by the liquid after stopping well not through the annulus, and directly by filing a displacing agent through the Central pipe.The drawing schematically illustrates the device.The device consists of a lubricator 3 plug valve 4 and cover with Salnikov device 2, through the gland skipped hollow rod 3 with the lugs 7, 9, connected with shut-off valve 12 and the pipe feeding the reagent from the pump 10. In the upper position of the hollow rod tip 9 is located inside the lubricator 3 above the level of the cork crane 4. In the lower extreme position of the hollow rod passes through the plug valve 4, the tee of the hole 5, the Central valve 6.The device operates as follows. The lubricator 3 is mounted on the borehole by means of an adapter 11 after stopping work well when closed, the Central valve 6 and line 8. Cap is brichter. Shut-off valve 12 in the closed position. The Central valve 6 comes off hollow rod 1 is translated at the cork open the valve 4 in the lowest position. To shut-off valve 12 in the closed position connects the supply line of the reagent from the pump. Offer linear valve 8, the shutoff valve 12, and turns on the pump reagent. Reagent displaces the gas through a linear gate valve 8 in line and fills the Central tube. After filling the Central tube reagent, aging or carrying out of any operations included the submerged pump and the displacement of the reaction products through the valve 8. Removable tip 9 has a cylindrical shape, the inner surface of which is treated with a purity of not less than 9. The inner diameter of the tip is selected on the basis of operating parameters of pump used.If necessary, a repeat injection of the reagent. After processing is completed, the shutoff valve 12 is closed, the pipe feeding the reagent is detached, the hollow rod 1 is raised to its extreme upper position. Plug valve 4 is closed, the cover 2 with Salnikov seal and the rod turns away from the lubricator. The lubricator of demonti the ASS="ptx2">The volume of reagents used for well treatment, is reduced by at least 5 times the cost of time - more than 2 times. It should be noted that using the inventive device provides opportunities for the expansion of methods of influence on aspg-fat:
more expensive and effective solvents due to a sharp decline;
thermochemical charges on the basis of the alkali metals, the use of which sometimes requires the completion of the reaction zone with water.Sources of information
1. A. C. the USSR 1092164, 09 3 00 E 21 IN 43/00, 1984, BI. 18, 61.2. A. C. the USSR 1234593, E 21 In 37/06, 1986, B. I. 20, 161.3. A. C. the USSR 310031, E 21 In 43/00, B. I. 23, 1971. 1. A device for washing the tubing of oil and gas wells, including the tank, pump, mounted on self-propelled vehicle with accessory equipment and components, and the estuarine rebar tying wells, characterized in that the composition of the peripheral equipment includes a lubricator with a built-in cork crane, Salnikov seal and a hollow rod, matched with Salnikov seal removable cover with possibility of vertical movement and fixation in the extreme positions, Ukraine upper position of the hollow rod its lower tip is located above the cork crane in the lubricator, and in the lowest position of the lower tip is located below the centre of the valve.2. The device under item 1, characterized in that the lower tip has a nozzle for forming pressurewise stream flowing fluid with a pressure higher than linear.
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, С9-С12-alkyl-phenol, С9-С10-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