Интеллектуальная собственность

FIELD: oil producing industry, particularly, operation of wells provided with pumps; applicable in recovery of oils with high content of paraffins. SUBSTANCE: method of well operation is realized in the following sequence: lowering of pump with location of its inlet for dynamic level of fluid in depth interval in which pressure at pump inlet is below critical value of main gas components of recovered fluid, but not lower than 3.0 Mpa. Fluid is pumped out simultaneously with gas withdrawal from annular space. EFFECT: higher efficiency of well operation due to prevention of paraffin deposition in oil field equipment and preservation of optimal operation of pump, excluded expenditures for acquisition and delivery of chemical reagents for well washing and losses resulted from downtime. 1 ex Подробнее

Полезная модель относится к способам и средствам обеспечения безопасности и контроля качества газовоздушной смеси и может быть использовано при строительстве и эксплуатации зданий, сооружений и помещений. Устройство автоматического обнаружения, контроля и устранения загазованности и задымленности помещений, содержащее, по меньшей мере, один датчик (1) предельно-допустимой концентрации газовоздушной смеси, соединенный с взрывобезопасным блоком (3), связанный с вытяжным вентилятором (4) и источник питания, причем датчик (1) снабжен дополнительным устройством подачи оповещающего сигнала о наличии дыма и угарного газов подключен к микроконтроллеру (2), дополнительно снабжено резервным источником питания, индикатором наличия электрического контакта (5) между элементами устройства, электрическим кабелем для подачи электроэнергии в автономный (8) источник питания, а сигнализация снабжена автоматическим и ручным выключателями. При использовании предложенного технического решения достигается эффект, заключающийся в своевременном обнаружении и устранении загазованности и задымленности помещений, непосредственно влияющий на безопасность зданий и сооружений и людей, находящихся в данных и соседствующих объектах, а также находящихся в непосредственной близости в момент потенциального инцидента или аварии, так как своевременно принятые меры по недопущению взрывоопасной смеси предотвращают отравления людей, пожары и взрывы в помещениях. 1 ил. Подробнее

Полезная модель относится к нефтяной промышленности и может быть использована для снижения забойного давления на пласт, либо поднятия динамического уровня над приемом насоса в скважинах с низким динамическим уровнем путем снятия избыточного давления газа в затрубном пространстве нефтяной скважины при эксплуатации электроцентробежными, электровинтовыми и электродиафрагменными насосами посредством отбора газа из затрубного пространства скважины по байпасным линиям и закачки его в выкидной коллектор. Обеспечивает повышение эффективности технологии добычи пластового флюида в скважинах с большим газовым фактором и в случае поломки оборудования не оказывает влияния на работу скважины ввиду оперативного переключения на штатный режим.Сущность полезной модели устройства для снижения давления газа в затрубном пространстве скважин, содержащего струйный насос заключается в том, что в скважинах с большим газовым фактором, оборудованных электроцентробежными, электровинтовыми и электродиафрагменными насосами, через дополнительный тройник и задвижку, установленные между центральной и буферной задвижками устьевой запорной арматуры скважины, проведена байпасная линия, параллельная линии отбора скважинной жидкости, на которой установлен струйный насос, камера разрежения которого соединена с затрубным пространством скважины отдельной линией, содержащей обратный клапан. Выход струйного насоса, перед линейной задвижкой, соединен с линией отбора скважинной жидкости через обратный клапан. Рабочим агентом струйного насоса при применении данного способа служит жидкость, поднимаемая электроцентробежными, электровинтовыми и электродиафрагменными насосами. Регулирование работы струйного насоса осуществлено изменением давления на его входе путем регулирования проходного сечения в штуцерной камере, либо угловой задвижке, врезанными в линию отбора скважинной жидкости, либо изменением частоты вращения погружного электродвигателя, либо подбором количества секций электроцентробежных, электровинтовых и электродиафрагменных насосов для создания требуемого напора. При этом происходит снижение избыточного давления газа в затрубном пространстве скважины посредством отбора газа из затрубного пространства нефтяной скважины и закачки его в линию отбора скважинной жидкости. На обеих входных линиях струйного насоса установлены аварийные электромагнитные клапаны, а в байпасную линию подвода прокачиваемой жидкости - пробоотборник для подачи метанола с целью исключения гидратных пробок. Давление в линиях контролируется манометрами. Для контроля уровня в затрубном пространстве скважины установлен автоматический уровнемер. Данные от датчиков поступают на станцию управления для контроля и автоматического управления работой оборудования и аварийных электромагнитных клапанов. Струйный насос и станция управления размещены в антивандальном боксе, оснащенном датчиками контроля воздушной среды, связанными со станцией управления. 1 рис." Подробнее

FIELD: oil and gas industry. ! SUBSTANCE: invention relates to the oil industry and can be applied to the operation of a small diameter injection well with a single-lift two-packer arrangement. Method includes preparing a well, lowering the arrangement into the well, planting the packers and testing them for leaks, pumping the working agent simultaneously and separately into the productive strata, during the overhaul period of the well for more than 360–370 days before this repair, a wing, shank of oil-well tubing (hereinafter tubing) with the diameter of 60–73 mm, the length of which is selected on the basis of the distance from the place of the maximum depth of gauging of the production string to the bottom, mechanical or hydraulic scraper for the production string with the diameter of 102–114 mm, a pattern with the diameter equal to or 1–2 mm larger than the packer diameter, and 15–25 m long on tubing with the diameter of 60–73 mm, scraper production of the production string is carried out in the interval of landing packers, the speed of the descent of the template and scraper does not exceed 0.25 m/s, the bottom is washed in the amount of not less than 1.5 times the well volume, the scraper is pushed up with the template, when the overhaul period is less than 360–370 days, the scraper with the template is not lowered, the arrangement is assembled, an axial action packer is used as the lower packer, the outer diameter of which is 5–10 mm smaller than the inner diameter of the production string, as the upper packer – resistant packer, outer diameter of which is 5–10 mm smaller than the internal diameter of the production string, non-removable part of the device separate injection (hereinafter DSI) is installed between the packers taking into account the fact that after installing the packers in the well, the DSI should be approximately opposite the upper reservoir or object of development, arrangement is run into the well to the required depth on the tubing string with a diameter of 60–73 mm; tubing is lowered with length measurement and internal gauging of the tubing string, packers are bind with geophysical research or measuring tubing, the layout is adjusted to a predetermined interval, a location for installing the packers is selected no closer than 2 meters from the coupling of the production casing, when binding with geophysical research, tubing head adapter is installed, if necessary, the hydraulic test of the tubing string for tightness is conducted, the packers are installed and pressurized, pressure of pumping fluid into the annular space during pressure testing of packers does not exceed the permissible pressure on the production string; the insert is released (the extracted part of DSI) with the required fittings into the non-removable part of DSI from the wellhead, in the recoverable part of the protective protection device, there are two flow channels: the first connects the tubing cavity with the upper layer, the second with the lower layer, fittings are installed in both flow channels, which, as necessary, distribute the total volume of injection over the benches (development objects), to clarify the correctness of the installed fittings, the flow rate of the injected fluid in the layout is determined using a geophysical flow meter, before lowering the flowmeter into the well, a valve is installed on it, blocking the opening of the flow channel for the upper reservoir, then the flowmeter is lowered into the well and set 20–30 m above the DSI, then the total measurement of the volume of fluid injected into two formations and bottomhole pressure is performed, then the flow meter is lowered even lower – all the way into the removable part of the DSI. At the same time, the valve installed on the flowmeter closes the flow channel to the fitting of the upper layer (object of development) and measures the volume of fluid injected into the lower layer (object of development) and the bottomhole pressure. When the obtained research results correspond to the required well, it is left in operation. If it is necessary to change the redistribution of the injected fluid through the benches a lift from the well of the extracted part of the injection distribution device is carried out, the chokes are changed to chokes with the required diameter, and the recoverable part of the protective relays is dumped from the wellhead to the well. ! EFFECT: technical result is higher efficiency of operation of injection wells. ! 1 cl Подробнее

FIELD: oil and gas industry. ! SUBSTANCE: method includes running in the assembly to the well, setting packers and their leak testing, dual injection of working fluid to production formations. The assembly is mounted. Axial packer is used as the lower packer and thrust plate packers are used as the upper packers. If instruments are available in the assembly, the cable is connected to the instruments and fixed on the assembly outer surface. The assembly is run in and its hydraulic leak testing is performed. The plug is removed by means of wire-line technique. The assembly is run to the well to a required depth on the tubing string with diameter smaller than the operating string by 1.6 to 2.9 times. The tubing string is run by measuring the length and gaging the inner cross-section of the tubing string. If the cable is available, it is simultaneously fixed at outer surface and the cable is run in together with the tubing string. The packers are positioned, fitting of the assembly is made to the preset interval by adjustable tubes, chuck is mounted, hydraulic leak testing is performed for the tubing string. The packers are installed. The packers are pressurized, and pressure controllers or well gauges are installed with pipe unions of given diameters in well chambers. During the operation, revision, manipulation or replacement of pipe unions of pressure controllers to the other diameter of pipe unions or installation of plugs is carried on regular basis. The revision, manipulation or replacement of unions is performed when the change of fluid pumping through isolated objects or prevention of boiling, sticking, filling of flow controllers is required. When injectivity of injection well of formations is reduced or additional oil production from reacting production wells is reduced, acid treatment is carried out in required interval of formations without extraction of single-lift multi-packer assembly. For this, investigation of flow rate and/or thermometry is carried out by cable or wire-line technique in interval of flow controllers and/or well chambers and/or formations. According to investigation result, the object for acid treatment is selected. By means of cable or wire-line technique, flow controllers are extracted from all well chambers in front of intervals of formations, the plugs are installed instead of flow controllers into well chambers in the interval of objects or formations where acid treatment is not necessary. Well chambers are left open in the interval of objects or formations where it is necessary to increase the injectivity. A flexible pipe with packing or furnace with 38 mm diameter is run by coiled tubing, flushing to the shoe of multi-packer assembly and/or treatment with use of paraffin solvents in volume from 3 to 15 m3 with expectation of reaction and/or with circulation for 3 hours of tubing string is carried out. Injectivity of formation or object is determined by injecting 3-6 m3 of fluid. Acid treatment of formation or object is carried out at 0.5-3 m3 rate per 1 meter of formation or object width. If necessary, acid residues are washed out and/or injected. Injectivity of formation or object is determined by injecting 3-6 m3 of fluid. Previously installed plugs are removed by cable or wire-line technique, and unions of 1-9.5 mm in diameter are installed or not installed on all well chambers in the interval of formations or objects. The well is used for injection for a certain time. The well is investigated by flow rate and/or thermometry in the interval of flow controllers and/or well chambers and/or formations. In accordance with the obtained investigation results, the required well remains in operation. In case of mismatch of obtained investigation results, the replacement of flow controllers and/or unions in well chambers and investigation of the well is repeated until required result is obtained. ! EFFECT: higher operation efficiency of wells with single-lift multi-packer assembly. ! 1 ex Подробнее

FIELD: oil and gas industry. ! SUBSTANCE: device for operation of a formation with zones of different permeability includes a horizontal area of a production well equipped with a filter. The filter is made in the form of pipe installed outside of coaxially opened casing pipe with a gap that is divided by transverse bridges into the sections. Gaps in some sections are provided with water-swelling material. The water-swelling material is made in the form of a sleeve installed above the casing pipe opening and sealing filter in the corresponding section from the inside. The sections are made alternating with the sections communicated with them without the water-swelling sleeve. The water-swelling sleeve is made with the ability to overlap the casing pipe opening in case of watering of the extracted products above the process defined rate. The casing pipe has an inner valve that lets inside. ! EFFECT: design of the device for exploitation of the formation with zones of different permeability allows to reliably cover the zone when the produced product is watered above the process defined rate, and also to eliminate the effect of the watered product from downstream zones on the swelling sleeve of upper zones and their premature overlap. ! 2 dwg Подробнее

FIELD: oil and gas industry. ! SUBSTANCE: according to method, well is drilled with orientation of horizontal shafts in direction perpendicular to the direction of maximum stress. A multi-stage hydraulic fracturing of the formation is performed in the horizontal shaft of the production well. A vertical well is drilled in the production formation. The first horizontal shaft is drilled from the bottom of the vertical well in direction perpendicular to the direction of the maximum stress. The first horizontal shaft is cased and perforated. The multi-stage hydraulic fracturing is carried out to form cracks with their subsequent fixing by proppant of fraction corresponding to permeability of production formation. A carrier fluid with 20/40 mesh proppant is pumped to fix the crack into the production formation with permeability of 0.01 to 50 mD. A carrier fluid with proppant of 12/18 mesh is pumped into the production formation with permeability of 50 to 500 mD. The horizontal shaft at the entrance is temporarily cut off. The second horizontal shaft is drilled from the bottom of the vertical well in the direction perpendicular to the direction of the maximum stress and opposite to the direction of the first horizontal shaft. The second horizontal shaft is cased and perforated. Hydraulic fracturing is perfoemed in horizontal shaft in perforation interval to form a crack penetrating through impermeable interlayer into underlying aquifer. A fracturing fluid with lightweight proppant of 40/70 mesh fraction is pumped by the first portion to form the crack. The second portion is pumped with the fracturing fluid with weighted proppant of 16/20 mesh fraction. The horizontal shaft at the inlet and before hydraulic fractuning interval is cut off. A downhole pump is lowered into the vertical well and the well is put into operation. ! EFFECT: improving the efficiency of the process by eliminating additional energy costs for pumping water into the injection wells. ! 3 dwg Подробнее

FIELD: oil and gas industry. ! SUBSTANCE: invention can be used in dual operation of production wells. When determining air-tightness of downhole equipment with dual extraction of fluids from well with sucker-rod pump and electric-centrifugal pump, dynamic level is determined in annular space of upper site, dynamometer chart of sucker-rod pump is measured. Further, method includes measuring operation parameters of electric centrifugal pump with telemetric system, collecting a control sample of fluid from flow line for water content, making sure of good condition and tightness of wellhead equipment, stopping sucker-rod pump of upper site. Then both in lower and upper position of ground drive of sucker-rod pump, performing pressurisation of tubing string with help of electric centrifugal pump of lower site while tracking change of pressure in buffer when operating with a closed valve. After stopping electric centrifugal pump, monitoring readings of operation at control station, in presence of alarm signal "turbine rotation", making a conclusion on drainage of liquid from tubing string and leakiness of check valve of electric centrifugal pump. At identical rate of rise and drop of temperature on buffer of well in different positions of ground drive of sucker-rod pump and pressure drop rate within a range of not more than 2 MPa for 15 minutes, making a conclusion on tightness of switch and tubing string in range of electric centrifugal pump to well head. At rate of increase of pressure on buffer of well in upper position of ground drive of sucker-rod pump below and rate of drop higher than in lower position of drive of sucker-rod pump, making a conclusion of leakage of sealing cup in lock support of switch. If in upper position of ground drive of sucker-rod pump electric centrifugal pump does not develop pressure at well buffer, and in lower develops and there is lifting of liquid level in annular space, then conclusion is made on output of sealing cup of sucker-rod pump from lock support switch. If both in both lower and upper position of ground drive of sucker-rod pump rate of pressure drop on buffer is more 2 MPa for 15 minutes, then conclusion is made on leakage of switch and/or tubing string in range of electric centrifugal pump to well head. Sucker-rod pump and electric-centrifugal pump are then put into operation without stopping sucker-rod pump of upper site, stopping operation of electric centrifugal pump of lower site. Immediately after shutdown of electric centrifugal pump of lower site, fluid level in annulus is monitored, and pressure change is measured periodically under packer based on readings of telemetric system on display panel of controller of control station. At stable increasing in level of liquid, conclusion is made on leakage, and at constant level of liquid, conclusion is made on tightness of packer or section of tubing string from electric centrifugal pump to packer. ! EFFECT: determination of tightness of downhole equipment. ! 1 cl, 2 dwg Подробнее

FIELD: oil and gas industry. ! SUBSTANCE: invention relates to oil industry and can be used in operation of well for extraction of viscous oil emulsion. Method of well operation includes equipment of well tubing string (TS) with bottom-hole pump, filter, cable and capillary pipeline. Electric current is supplied via cable and a solvent and asphaltene-resin-paraffin deposits - ARPD, via capillary pipeline. Method comprises simultaneous recovery of products via tubing string by sucker rod pump. At wellhead in tubing string from below upwards is arranged: plug, heater, filter, bottom-hole pump. Cable is connected with heater, and on external surface of tubing string is secured by clamps cable to heater and capillary pipeline from wellhead to depth of above sucker rod pump with input into inner cavity of tubing string. Tubing string is placed in well so that heater is located from middle of formation to its bottom. For 24 hours before starting drive of sucker rod pump, heater is put into operation. Operating temperature of heater is not higher than 40 °C. After 24 hours is performed step-by-step operation of well bottom-hole pump drive starting with minimum number of swings and maximum stroke and with periodical stepped increase of temperature of heater at 20 °C, starting with temperature of 50 to 90 °C, and solvent supply with pump dosaging device via capillary pipeline with stepped reduction of solvent feeding at 5 l/h, starting from supply of 15-5 l/h, at each stage of operation under condition of achieving maximum volume of product. ! EFFECT: higher efficiency of heating bottom-hole zone. ! 1 cl, 1 dwg, 1 tbl Подробнее

FIELD: oil industry. ! SUBSTANCE: invention relates to oil industry and can be used in operation of outdated and worn-out well with defective production strings. During well operation, method comprises lowering first column of tubing string with packer. Packer is placed below discontinuity of production string, then packer is installed. Second string is lowered - low string inside first column of tubing string with packer. Product is extracted at second small tubing pipes. For performance of operations, method includes selecting well producing oil emulsion with low flow rate to be reproduced by sucker-rod pump in a small column of tubing string. Pump used in small flow string pipes is a rod pump which provided well flow rate, existing before operations. Equipment is mounted in well. Method comprises holding for separation of oil emulsion in well on water and oil and formation of aqueous medium at pump inlet. From well head along inner wall of first column of tubing string is dosed demulsifier. Pump is put into operation. Well fluid level is maintained near pump. ! EFFECT: technical result is higher efficiency of oil production. ! 1 cl, 1 ex Подробнее

FIELD: oil and gas industry. ! SUBSTANCE: invention relates to the petroleum industry. Method of operating high-viscosity oil producing well comprises lowering into well an assembly, which consists from bottom-up of a perforated pipe, a packer, a bottom-hole pump, tubing string; actuation bottom-hole pump under action of movements of rod string, extracting high-viscosity oil via tubing string to well head. After beginning of extraction of high-viscosity oil, initial dynamogram is captured and initial maximum and minimum load on rod string is determined. Further, method includes extraction of high-viscosity oil via tubing string by sucker rod pump until rod string hangs. Then in tubing-casing annulus by geophysical elevator, logging cable is lowered with tip at end for pulsed high-frequency thermo-acoustic treatment of well so that tip is located below reception of sucker-rod pump, but 2 m above packer. Pulsed high-frequency thermo-acoustic treatment of well is performed without interruption of high-viscosity oil extraction by sucker-rod pump. During pulsed high-frequency thermo-acoustic treatment of well, periodic capture of dynamogram every 12 hours until restoration of maximum and minimum load on stem to not more than 5 % below initial values is performed. Then, without interruption of extraction of high-viscosity oil, treatment of well is stopped and logging cable with tip is removed from tubing-casing annulus. ! EFFECT: improving operational efficiency of producing high-viscosity oil wells, higher quality of cleaning of downhole equipment from asphalt, resin, and paraffin deposits, reduced load on rod string of sucker-rod pump. ! 1 cl, 1 dwg, 3 ex Подробнее

FIELD: oil and gas industry. ! SUBSTANCE: well is equipped bottom upwards with a tubing string ended with a packer, submerged pump, switch, two outer and inner annulus of the tubing string which are located concentrically, tubes with holes at the outer tubing string. The well is splitted over the productive stratum. The stratal product is delivered by the submerged pump in a cyclic mode "delivery-stop" from the productive stratum through the tubing string, the switch, tubular annulus between inner and outer tubing string, tubes and holes of tubes into tubular annulus between the production string and outer tubing string. Pressure is created and maintained in the upper pert of the well; it should not be less than oil degassing pressure and more than permissible pressure to the production string. Separation of the stratal product into oil and water is arranged in the upper part of the well. Completeness of separation is controlled by the duration of a half of the operation cycle of the submerged pump till stoppage and by the distance between switch and the tube with a hole. Oil is delivered to oil line. Water is supplied through the switch to inner tubing string and through the pipeline to an injection well by borehole-to-borehole water pumping and/or through tubular annulus between the production string and outer tubing string and tubing string with a packer to the stratum over the packer by borehole water pumping. ! EFFECT: improvement of oil and water separation degree, increase in injection efficiency of separated water during borehole and borehole-to-borehole pumping of water. ! 1 ex, 1 dwg Подробнее

FIELD: oil and gas industry. ! SUBSTANCE: method of well operation consists in product extraction via pipe string that is supplied by electric centrifugal pump in stationary mode, well shut-down, replacement of electric centrifugal pump by electric centrifugal pump of higher capacity and product extraction via pipe string in cycle operation. Pipe string above electric centrifugal pump is equipped with two return valves located in series. Electric centrifugal pump of higher capacity is operated with pressure 5-100% more than electric centrifugal pump for stationary mode of product supply. Cycle mode of product extraction is applied from the time of electric centrifugal pump stop not more than the stop time for cycle mode during which scaling formation takes place at the operating parts of electric centrifugal pump. ! EFFECT: possibility to eliminate scaling and facilitation of electric centrifugal pump starting after its shutdown. ! 3 ex Подробнее

FIELD: oil and gas industry. ! SUBSTANCE: according to the method the well is equipped with two tubing strings; the first string is equipped with non-return valve and packer controlled from well head, and the first string is used for pumping of working agent to the formation. The second string is equipped with bore-hole pump. Its end is arranged above packer and the second string is used for extraction of liquid from formation. Releasing device is installed, working agent is pumped, and pumping is stopped and liquid is extracted from the well. Working agent is pumped through the first string till well injection capacity decreases below 50 m3/day. After pumping is stopped, process exposure is performed till pressure between formation and bottom-hole zone of formation is balanced. Packer is opened and liquid is extracted with bore-hole pump through the second string till bottom hole pressure decreases not lower than gas oil saturation pressure. Liquid extraction is stopped, upper space of well hole is covered with packer above perforation interval, solution margin of surface active substance is pumped and pumping of working agent is continued. Extraction and pumping cycles are repeated. ! EFFECT: possibility of preserving injection capacity of injection well at its operation and recovery of injection capacity after process break. ! 1 ex Подробнее

FIELD: oil and gas industry. ! SUBSTANCE: according to the method the tubing string with electric centrifugal pump is lowered to the well and liquid is extracted from well during well operation. Tubing string is equipped with packer arranged above pump, and pump is replaced with pump having higher head. Tubing string is lowered to the well through the depth corresponding to height of liquid column, which is lifted with replaced pump. Packer is installed and liquid is removed from under packer. ! EFFECT: reducing water content in extracted products. ! 1 ex Подробнее

FIELD: oil and gas industry. ! SUBSTANCE: in well operation method involving pumping of composite material to the formation to the interval below oil-water contact, process exposure and operation of the well, there preliminarily performed is forcing of water from inter-tube space with oil to the interval below oil-water contact; in order to prepare composite material the thickener is filled to inter-tube space of the well on the basis of 1-5 kg per 1 m3 of oil located in inter-tube space, and mixing of thickener with oil in inter-tube space by oil circulation with thickener via tubing string and inter-tube space, and pumping of solution of oil and thickener from inter-tube space to the interval below oil-water contact is performed in pulse mode under pressure exceeding hydrostatic one by not more than 10%; at that after process exposure the well operation is performed during the first 5-15 days in moderate mode with flow rate of not more than 50% of the operating one. ! EFFECT: reducing associated water production. ! 1 ex, 1 dwg Подробнее

FIELD: mining. ! SUBSTANCE: flow column with perforation below packer is installed with rest on bottom hole. The packer, mounted above perforation on the flow column, divides payout beds. At low speed of swab lifting a lower payout bed is swabbed. Then packer releasing is carried out. Zone under the packer is filled with hydrochloric acid solution, the packer is installed, hydrochloric acid solution is pushed into the lower payout bed and process conditioning is performed. Swabbing is carried out at a high peed of swab lifting till liquid in a well drops to a level of 600-800 m, then swabbing is performed at a low speed of swab lifting till inflow from the lower payout bed appears, then swabbing is carried out at a high speed of swab lifting. After that the packer is released. The flow column with perforation above the packer is arranged with rest on the bottom hole. The packer installed below perforation on the flow column divides the payout beds. Swabbing of the upper payout bed is carried out at a low speed of swab lifting. Zone above the packer is filled hydrochloric acid solution, then this solution is pushed into the upper payout bed; and process conditioning is performed. Swabbing is carried out at a high peed of swab lifting till liquid in a well drops to a level of 600-800 m, then swabbing is performed at a low speed of swab lifting till inflow from the upper payout bed appears, then swabbing is carried out at a high speed of swab lifting. Then the assembly is lifted from the well. The down hole pumping equipment is lowered and the well is operated in a cyclic mode "pump running-process conditioning", after that the well is operated under "pump running" mode. ! EFFECT: increased productivity of well. ! 1 ex Подробнее

FIELD: oil industry, particularly to design optimal bottomhole pumping facilities for efficient well operation without well overhaul. ! SUBSTANCE: method involves stopping well, decreasing liquid level in well; recording pressure recovery curve and processing obtained data. Liquid level in well is decreased by multistage swabbing operation up to well filling with reservoir fluid. Each swabbing stage is accompanied by pressure recovery curve recording. After well filling with reservoir fluid two additional swabbing stages with pressure recovery curve recording are carried out. Averaged productivity factor value is determined from two last pressure recovery curves. To interpolate pressure recovery curve section from pressure recovery initiation to point of curve inflection as it reaches asymptote is selected. After that downhole equipment is chosen so that downhole equipment has characteristics corresponding to calculated data. Well is operated in regimes corresponding to chosen equipment. ! EFFECT: increased accuracy of well productivity coefficient determination, downhole equipment choosing and operational regimes selection. ! 1 ex, 1 dwg Подробнее

FIELD: oil industry, particularly operation of well penetrating two reservoirs. ! SUBSTANCE: method involves lowering two pipe strings in well; separating upper reservoir from lower one with packer; injecting working agent in lower reservoir via the first pipe string provided with packer and producing liquid from upper reservoir via the second pipe string provided with pump. Pipe string for liquid extraction has pump with delivery enough for liquid taking from both reservoirs. Well head has connections including pipes, locking members and check valves to provide periodic connection of the first pipe string with working agent source for working agent supply in lower reservoir, with discharge line and with hole annuity of the well. Working agent injection via the first pipe string into lower reservoir is periodically stopped and the first pipe string is communicated with discharge line. Liquid is poured out from lower reservoir into discharge line and the first string is communicated with working agent source for working agent injection in lower reservoir. Oil is continuously taken via the second string by means of pump. Pump delivery is changed to take liquid only from upper reservoir or from both reservoirs simultaneously. After liquid discharge from lower reservoir the first string is communicated with hole annuity, pump delivery is increased and liquid is pumped out from both reservoirs simultaneously. As lower pool productivity is reduced the first string is isolated from well hole annuity, pump delivery is decreased and liquid is pumped out from upper pool via the second string along with working agent injection in lower reservoir via the first string. After stoppage of working agent supply into lower reservoir via the first string technological time-delay is performed to lower water cones and to decrease oil inflow to well. ! EFFECT: increased completeness of oil taking from reservoirs. ! 3 cl, 1 ex, 1 dwg Подробнее

FIELD: oil extractive industry, possible use when extracting water and oil from wells. ! SUBSTANCE: method includes dividing liquid in well on water and oil and separately extracting water and oil. In accordance to invention, in water saturation of oil product well exceeds 99,5% it is transferred to class of water product wells in formation pressure maintenance system with incidental extraction of oil. For that purpose well is outfitted with two tubing strings with pumps. First string is lowered for depth, filled with water, separated during gravitational division of oil. Second column is lowered for depth, close to well mouth, into oil accumulation zone, influx from productive formation is maintained by draining constant amount of water via first tubing string from condition of prevention of precipitation of mudding substances in a well and well-adjacent formation zone. Extraction of oil via second tubing string is performed constantly or periodically depending on oil accumulating in a well. ! EFFECT: ensures extraction of incidental oil during main extraction of water for formation pressure maintenance system. ! 1 ex Подробнее