ethods or apparatus for controlling the flow of the obtained fluid to or in wells (E21B43/12)

E   Fixed constructions(158735)
E21B43        Obtaining fluids from wells(11343)
E21B43/12                     ethods or apparatus for controlling the flow of the obtained fluid to or in wells (e21b0043250000 takes precedence;valve arrangements e21b0034000000)(517)

Downhole device and method // 2637351
FIELD: oil and gas industry.SUBSTANCE: bottomhole actuator (30) includes a tubular casing (34) that includes a profile (42) of step-by-step displacement on its inner surface and a bushing (46) of step-by-step movement mounted in the casing (34). A bushing (46) of step-by-step movement comprises an engaging device including first and second axially spaced engagement elements (52, 54) with the profile (42) of the casing (34) step-by-step movement for step-by-step engagement by a control object (48) passing through a central channel (50) of step-by-step for moving the step-by-step bushing (46) by one discrete movement step through the casing (34) to actuation location.EFFECT: increased efficiency of the downhole device and method of its use.28 cl, 51 dwg
ethod for taking deep samples of formation oil in well when testing and coupling for directing flow of formation fluid for its implementation // 2636843
FIELD: oil and gas industry.SUBSTANCE: in order to implement the method, a tubing string equipped with a mounting nipple for installation of sampling equipment and the coupling for directing the flow of formation fluid at the tubing bottom are lowered into the well. After depression is created, the evaluation of inflow rate and presence of oil in the inflow is carried out. The time required for oil to fill the tubing below the nipple is calculated by the inflow rate, and the operation time of the sampler is determined. The method includes running equipment consisting of a mandrel for hermetic seating into the seat nipple on the tubing of shut-off valve together with the sampler and a deep self-contained thermomanometre. Air-tight fitting of equipment into the seat nipple is performed, thus shutting-off the tubing string by the plug-in equipment. This creates conditions for accumulation and selection of depth sample of formation oil in the well in close proximity to the formation top. The formation oil is directed through the coupling for directing the flow in drop-jet form at low depression into the tubing string space, the sample is separated and accumulated in the rated period under the shut-off valve and the deep sample of the formation oil is taken out by the sampler installed together with the shut-off valve.EFFECT: providing sampling of representative samples of formation oil, the application of which is possible at non-flowing test facilities.2 cl, 3 dwg, 1 tbl

Well plunger lift unit // 2630512
FIELD: oil and gas industry.SUBSTANCE: installation of well plunger lift that includes tubing, a plunger, a bottomhole shock absorber and a wellhead shock absorber with cantilevered bar, a lubricator, a travel limiter with plunger arrival sensor, a drive valve and an electronic controller. The plunger includes a set of movable rings that provide flexibility of the plunger in transverse direction, a longitudinal channel for reducing hydraulic resistance when the plunger travels down. Movable rings are connected together by hollow pins with ball heads on both ends. The sealing of the longitudinal channel is carried out by the valve assembly.EFFECT: improved design and increased efficiency of the well plunger lift unit in wells with angular, helical or wavy curvature.2 dwg
odular binding of coal-methanol well // 2629500
FIELD: oil and gas industry.SUBSTANCE: modular binding includes an accounting and measurement unit module. This module contains flowmeters-liquid and gas meters, connecting pipelines, a heat converter, a throttle valve and a shut-off valve. The module of the metering and measuring unit provides measurements by a downhole sensor. The connecting pipes are flexible high-pressure hoses with quick-detachable connections. The module of the metering and measuring unit on gas and water line inlet and outlet is connected to x-mass tree and additionally contains a gas analyzer, a flame detector, and pressure transducers. These transducers are installed before and after the throttle valve. The throttle valve is made with an electric drive and PID controller and provides possibility for controlling - throttling of gas pressure in annular space. The module of the metering and measuring unit is connected by explosion-proof electrical connectors to a control and power supply module. The latter is designed to receive and process measurements of the metering and measurement module, maintain the specified values of annular and bottomhole pressures, record produced gas with correction for temperature and pressure, and account produced formation fluid. This module contains a pump control station with a frequency converter, an automation and communication cabinet, a power distribution cabinet.EFFECT: cost reduction for binding a methane-coal well, time reduction for installation and adjustment of equipment, quality improvement of development and operation processes of methane-coal wells by providing automatic maintenance of well operation parameters operation according to given schedule.1 dwg

ethod of well operation (versions) and devices for its implementation // 2629290
FIELD: oil and gas industry.SUBSTANCE: method of well operation by installing electric centrifugal pump includes putting the well into operation, producing well product, shutting down, restarting the plant that includes air-tight screwed tubing strings, a motor, an electric centrifugal pump that includes a body, a shaft, stages, a base and fishneck, a return valve installed air-tightly above the pump characterized in that in the lower part of the pump there is a pump shut-off device in the form of at least one valve comprising stationary body and dynamic bushing mounted on a shaft which is hermetically sealed, when the pump is shut-down, and during operation it opens and connects the lower part of the pump to the annular space. The shut-off valve module of the electric centrifugal pump for operating the wells includes a body, the end parts, a shaft, at least one valve that hydraulically connects the pump inlet and the annular space, and which consists of stationary mounted valve body and dynamic bushing mounted on the shaft. The electric centrifugal pump for the operation of wells, which body contains at least one valve in the lower part hydraulically connecting the pump inlet and the annular space, and which consists of valve body stationary mounted in the pump body and dynamic bushing mounted on the shaft.EFFECT: increased effectiveness of proposed group of inventions.5 cl, 6 dwg

System and method of flow-control valve optimum adjustment // 2627287
FIELD: oil and gas industry.SUBSTANCE: flow-control valves network is contained in the completion network, located along the isolated zones of the borehole at least of one multi-zone borehole lateral hole. The data is obtained from the bottomhole in multi-zone borehole and processed on the processor system modules, that may be used in the selected combinations. The examples of such modules include the network completions modules, deconvolution modules, optimizing modules and/or the inlet-outlet modules. The modules are configured to process the collected data, so as to contribute to the adjustment of the flow-control valve settings in the flow regulators network to upgrade the required target function.EFFECT: efficiency increase of the system and method of the flow-control valve optimal adjustment.20 cl, 8 dwg

ethod and system for orientation in wellbore // 2624499
FIELD: oil and gas industry.SUBSTANCE: method of orienting the column tubing in the borehole includes a column slope downhole tubing inside casing string in a wellbore, the engagement tool alignment borehole tubing with tool alignment casing during the descent of the column of downhole pipes turn rotation/twist string downhole pipes response to engagement tool alignment borehole tubing with tool alignment casing alignment holes by turning in a convoy well pipes with a hole in casing string through the casing string for rotation basis and retention aligned openings in the column of well pipe with an opening in the casing string axially and turn. Column of the well pipes comprises an opening in the column tubing and downhole tool string downhole equalizing pipes.EFFECT: increasing the efficiency of the system and methods of well pipe in the well bore orientation.22 cl, 7 dwg

ethod for carrying out water shutoff treatment in well // 2622965
FIELD: oil and gas industry.SUBSTANCE: according to method, before carrying out the water shutoff treatment, the size of the new perforation interval is determined by the oil and water ratio in the well production. The insulating compound is prepared in a volume exceeding the internal volume of the well from the bottom hole to the upper limit of the perforation interval. The grout pipe string is lowered into the well. The insulating compound is poured into the well at least up to the upper limit of the perforation interval with the overflush in the formation. The insulating compound with different mobility values is poured into different levels of the perforation interval. Then the grout pipe string is extracted from the well. The insulating compound is left till it is cured. It is hold for time additional to the time for curing the insulating compound, to lower the water cone. After the time of curing the insulating compound and the time of lowering the water cone has expired, the insulating compound is drilled out. The formation is opened by gently perforating the well in the uppermost part of the formation. Before pouring the insulating compound, the inner space of the well is filled below the upper limit of the perforation interval with the jamming compound through the grout pipe string. A blind plug is lowered into the well and installed below the upper limit of the perforation interval.EFFECT: increased efficiency and reliability of carrying out water shutoff treatment in a well.11 cl, 3 dwg

Device for sequential oil and water sampling from well // 2620824
FIELD: oil and gas industry.SUBSTANCE: device includes a ran-in-hole electric centrifugal pump with a bottom-plugged inlet pipe branch passing through the packer which separates the upper and lower reservoir layers and has a hole for the exit of the lower layer products into the above-packer space and openings for intaking segregated oil and water of the lower layer through the inlet pipe branch, upper and lower floats of intermediate density with mounting seats located in front of the inlet openings, bottom-hole apparatus moved down inside the inlet pipe branch and connected to the telemetery system of submersible electric motor via a cable. There in the cylinder a spring-loaded piston with a lower rod designed to enter the mounting seat of the float is located above the mounting seat of the intermediate density float. A spring-loaded check valve is installed in the lower part of the inlet pipe branch. Moreover, the elasticity of the piston spring above the float exceeds the elasticity of the check valve spring.EFFECT: increased reliability of sequential oil and water sampling from well for separate recording of the reservoir layer products in dual well operation.3 dwg

Controlled well electromechanical valve // 2620700
FIELD: mining.SUBSTANCE: controlled well electromechanical valve consists of a body, a connecting wet contact, a drive including a micro electric motor fed from the zero point of the centrifugal pump motor, and a reducer with an output shaft rigidly connected to the screw nut, inside of which is a screw coaxially articulated with a hollow stem with a hole for measuring the pressure in the formation. A movable differential piston, levelling well and reservoir pressure, is mounted on the hollow stem. At the free end, the hollow shaft is hermetically articulated with an auxiliary hollow valve and a saddle with an outlet channel into the wellbore, placed in the inner cavity of the controllable hollow valve with a seat regulating fluid flow from the formation.EFFECT: increasing the reliability of the valve.1 dwg

System and method for advanced fluid extraction from gas wells // 2620665
FIELD: oil and gas industry.SUBSTANCE: well system is controlled to cyclically increase or decrease the gas pressure in the casing string annulus, thereby cyclically reducing the bottomhole pressure in the well in response to the pressure decrease in the casing string annulus and allowing for an increase in bottomhole pressure in the well in response to the increased pressure in the casing string annulus. Thus, fluid production from the productive formation is increased during the cyclic pressure reduction inside the casing string annulus and fluid discharge by the well pump is increased during the cyclic pressure increase in the casing string annulus. Furthermore, the gas interference due to the foam formation inside the casing string surrounding the well pump may be reduced by liquid displacing from the foam over an extended pressure period in the casing string annulus.EFFECT: increased efficiency of control over the fluid extraction from a gas well.21 cl, 5 dwg

Variable-diameter male hub assembly // 2619780
FIELD: mining.SUBSTANCE: male hub assembly comprises a housing and a male hub tip disposed at the distal end of the housing, a compression ring disposed around the outside of the housing and made with the possibility of axial movement relative to the housing immediately after being actuated and a plurality of clamping jaws connected and laid between the compression ring and the tip of the male hub. Each clamping jaw is precompressed, whereby each clamping jaw is prone to bend radially outward, at that, when the compression ring is actuated, a plurality of clamping jaws moves radially outward from the first diameter to the second diameter that is larger than the first diameter.EFFECT: reliability increase.23 cl, 13 dwg
ethod of water inflow limitation in flooded carbone reservoirs // 2619778
FIELD: oil and gas industry.SUBSTANCE: method of water inflow limitation in flooded carbone reservoirs includes preparation, injection and squeezing of polyaluminium chloride water solutions to the isolation zone, leaving the well to respond to form a gel from polyaluminium chlorideaqueous solution, and to complete and commission the well. The coiled tubing (CT) is lowered and placed over the isolated perforating interval. The perforation interval injectivity is determined, from 30 to 45 m3 10% polyaluminium chloride aqueous solution is injected at teh perforation interval injectivity from 1.0 to 3.0 m3/(h⋅MPa) or from 45 to 90 m3 at injectivity from 3.0 to 10.0 m3/(h⋅MPa). The injection and squeezing of the polyaluminium chloride solution is carried out at the maximum liquid flow rate, which ensures uninterrupted pump unit operation, preventing the pressure increase beyond the permissible level of the production casing and formations, the well is stopped for technological holding for 168-180 hours.EFFECT: increased efficiency in water influx isolation in flooded carbonate reservoirs due to pumping water isolating reagent with the specific isolated interval injectivity, reduced viscosity of water isolating reagent, simplified isolation operations by making them in without preliminaly liftining of downhole pumping equipment installation and use of a unit with a flexible pipe.2 tbl
Borehole submersible electric plant control system // 2619003
FIELD: oil and gas industry.SUBSTANCE: control system contains the matching transformer, cable line, adjusting fitting, pipeline return valve, the first branch, box-pipe sub, tubing, knock-off valve, borehole return valve, the second branch, the fishneck, electric submersible pump, gas separator, wear sleeve, submersible motor, filter and control system. The control system also contains the radio communication device, the switching system, control and measuring gauges of the motor (SKUIPE), feedback coupling SKUIPE, multiphase fluid flow meter without separation, control transmission unit (CPU), the CPU feedback. The meter without separation includes the temperature sensor, adjustable valves, pressure sensor, moisture meter, multiphase Coriolis flowmeter and densimeter.EFFECT: providing continuous measurement of each of the recovery multiphase fluid component and increasing of time between maintenance plant operation period and energy efficiency of the plant operation in the controlled modes.1 dwg

Installation for simultaneous-separate operation of two layers of one well // 2618713
FIELD: mining.SUBSTANCE: installation comprises a centrifugal pump with a receiving module and an electric drive, a packer and an adjusting device that allows fluid bypass of one of the banks to mix bank production before rising to the daylight, moved down into the drive tube on the tubing string. In this case, the adjusting device consists of an electric drive fixed to a submersible pump, a telescopic rod and a screw head. The submersible pump is installed above the packer. A shank with a top funnel is hermetically sealed into the packer. A screw bushing is hermetically sealed in the shank. At the same time, the screw head is partially or completely inserted into the screw bushing, regulating the volume of fluid flow from the lower bank to the behind-the-packer space. Regulation of the screw head immersion into the screw bushing is provided by a telescopic rod by means of an electric drive.EFFECT: increase of simultaneous-separate operation efficiency of two layers of one well due to fluids mixing regulation smoothness of two layers of one well.3 cl, 1 dwg

Installation for simultaneous-separate operation of two layers of one well // 2618710
FIELD: mining.SUBSTANCE: installation comprises a centrifugal pump with a receiving module and an electric drive, a packer and an adjusting device that allows fluid bypass of one of the banks to mix bank production before rising to the daylight, moved down into the drive tube on the tubing string. In this case, the adjusting device consists of an electric drive fixed to a submersible pump, a telescopic rod and a screw head. The submersible pump is installed above the packer. A shank with a top funnel is hermetically sealed into the packer. A screw bushing is hermetically sealed in the shank. At the same time, the screw head is partially or completely inserted into the screw bushing, regulating the volume of fluid flow from the lower bank to the behind-the-packer space. The adjustment of the immersion of the screw head into the screw sleeve is provided by the telescopic rod by means of an electric drive powered from the submersible pump cable.EFFECT: increase of simultaneous-separate operation efficiency of two layers of one well due to fluids mixing regulation smoothness of two layers of one well.3 cl, 1 dwg
Development method of carbonate oil formation (options) // 2618547
FIELD: oil and gas industry.SUBSTANCE: development methods of carbonate oil formation include waterproofing operations in production wells by injecting a plugging composition, followed by the bottomhole zone treatment with acidic composition, technological aging, and well completion. According to the first embodiment, the new is that as the plugging composition for waterproofing operations a composition is used comprising xanthan, polyacrylamide PAA, chromium acetate and fresh water, at the following component ratio, wt %: xanthan 0.1-1.5, 0.1-1.0 PAA, chromium acetate 0.01-1.0, and fresh water is the rest. Wherein the said composition is forced into the formation with the process fluid of density corresponding to the well-killing fluid, the well is left for process conditioning for 96-240 hours, then the wellbore area is processed with an acidic composition; as acidic composition, a composition is used comprising inhibited hydrochloric acid, sulfamic acid, ammonium acetate, ethoxylated alkylphenol and fresh water, at the following component ratio, wt %: inhibited hydrochloric acid 0-80.0, sulfamic acid 1.0-15.0, ammonium acetate 1.0-6.0, ethoxylated alkylphenol 0.01-1.0, fresh water is the rest. After acid treatment, the well is left for process conditioning for 2-24 hours, and the well is completed.EFFECT: increased oil recovery due to increased formation coverage by exposure, connection to the development of previously unreached oil-saturated interlayers, increased filtration properties of the carbonate reservoir matrix, and expansion of the method technological capabilities.2 cl, 1 tbl

Installation for simultaneous-separate operation of two beds of one well // 2617733
FIELD: mining.SUBSTANCE: invention can be applied for simultaneous-separate operation of two beds. The installation comprises a centrifugal pump with a receiving module and an electric drive, a packer and an adjusting device that allows fluid bypass of one of the banks to mix bank production before rising to the daylight, moved down into the drive tube on the tubing string. In this case, the adjusting device consists of an electric drive fixed to a submersible pump, a telescopic rod and a screw head. The submersible pump is installed above the packer. A shank with a top funnel is hermetically sealed into the packer. A screw bushing is hermetically sealed in the shank. At the same time, the screw head is partially or completely inserted into the screw bushing, regulating the volume of fluid flow from the lower bank to the behind-the-packer space. Regulation of the screw head immersion into the screw bushing is provided by a telescopic rod by means of an electric drive.EFFECT: increase of simultaneous-separate operation efficiency of two layers of one well due to fluids mixing regulation smoothness of two layers of one well.3 cl, 1 dwg
Well killing fluid // 2617661
FIELD: oil and gas industry.SUBSTANCE: liquid comprises 2.0-70.0 wt % of inorganic salts or mixtures thereof or hydrates of these salts, 0-20.0 wt % of dispersed phase, 0.2-20.0 wt % of polymer composition SCA-214, 0.02-2.0 wt % of surface-active agent (SAA) and water.EFFECT: minimized killing adverse effect on filtration-volumetric characteristics of oil and gas wells, reduced development duration, maintained productivity, decreased hydration of argillaceous deposits and reduced surface tension at the hydrocarbon liquid interface.3 tbl

ethod of killing of oil wells with high gas factor in permafrost conditions // 2616632
FIELD: oil-and-gas industry.SUBSTANCE: invention relates to oil and gas industry, namely, to killing of oil wells. The oil well killing method includes damping injection into the well through the tubing string of potassium chloride-based solution with the density required for formation conditions. Then the viscoelastic composition is injected which comprise the saline solution based on potassium chloride, 0.1 wt % of caustic soda and thickener polymer with filler -. 0.75 wt % of xanthan gum and 2.5 wt % of vermiculite. The injected components are flushed through the perforations in the production casing and through the fracture formed during the fracturing in the near-well zone with formation in the bottom and near the wellbore of the blocking screen layer which is impermeable for water and gas contained in crude oil. Then only saline is injected into the annulus through the tubing string by creating the direct circulation between the production string and the tubing lowered into it.EFFECT: invention consists in improvement of the reliability of oil well killing and blocking of bottomhole formation zone in permafrost conditions without thawing.2 dwg

Well transport device // 2615542
FIELD: oil and gas industry.SUBSTANCE: device comprises a drive, a pump, and a shaft connecting the drive to the pump, and a mechanical sealing unit. This unit comprises, in turn, a mechanical seal with a rotatable sealing ring and a stationary sealing ring. The mechanical seal has the ability to seal the shaft. There is an autonomous feeding device which provides for a mechanical barrier medium sealing. The independent feeding device, drive, pump, shaft and the mechanical sealing unit form a compact transport unit that is completely submerged in the borehole. The independent feeding device comprises a first chamber for barrier medium receiving and the second chamber. This device is connected to the well transport device outer side so that the pressure corresponding to the transported medium pressure prevails in the second chamber. The bellows sealingly separates the first chamber from the second chamber.EFFECT: increased device reliability.10 cl, 3 dwg
Downhole device for simultaneous-separate pumping of agent // 2613398
FIELD: oil and gas industry.SUBSTANCE: downhole device comprises packers mounted at the compressor tubing column and module of flow control and metering of the injected agent of telecontrol system, including butterfly valves, combined by motor drive unit, telemetry sensors and a flow meter, the latter are positioned in the sealed sleeve cavities, arranged in parallel in the sealed casing bounded by direct flow multi-channel coupling from below and connected with geophysical cable passed through wellhead shut-off valve with instrumentation at the control station. The trunk of the upper packer is connected to the direct flow multi-channel coupling by the upper end and to the radially-running coupling by the lower end, there is a shank in the center hole of the radially-running coupling, interconnected to the one of the channels of direct flow multi-channel coupling by the end of a different close, which forms coaxial channels of separate agent pumping in the well layers with the trunk of the upper packer. Housing is limited by the intake manifold from above, connecting the cavity of compressor tubing column to sleeve cavities, wherefore an axial pup joint is designed in the electric wire unit block of chocke valves, connecting the compressor tubing column to a collector. A pressure sensor of the finishing agent is positioned at the pup joint input, connected to the geophysical cable with the control meter, placed at the control station, while locking seats interacting with throttle valves are mounted at the inputs of the diverging channels of the intake manifold.EFFECT: device design simplification and improved reliability of well operation.2 cl, 1 dwg
ethod for limiting water inflow in well // 2611794
FIELD: oil-and-gas industry.SUBSTANCE: invention relates to oil industry, in particular to methods of limitation of water inflow in a well, using water-swellable polymers, and can be used during waterproofing works to limit the inflow of the bottom, edge or injected water penetrating through highly permeable seams or fractures. The method comprises preparation and injection into the perforated interval (to be isolated) of swellable elastomer suspension in the water-soluble polymer solution. Into the perforated interval (to be isolated) 5-15 m3 of 1-1.5% of the water-swellable elastomer suspension in 0.1-0.2% water-soluble polymer solution and 10-25 m3 of water suspension of bentonite with the density 1160- 1320 kg/m3 are consistently and continuously injected. The named injection cycle is repeated from 1 to 5 times depending on the injectivity of the perforated interval. After completion of injection the additional volume of 5-10 m3 of 0.5-0.8% water solution of water-soluble polymer is injected with addition of 0.08-0.16% chromium acetate from the volume of water soluble polymer. The water-soluble polymer is polyacrylamide with the mass fraction of water insoluble residue no more than 0.3%, and the water-swellable elastomer is partially crosslinked polyacrylamide with the mass fraction of the soluble part no more than 5%, the solutions of water-soluble polymer and suspension of bentonite powder are prepared using the water with the density 1090-1180 kg/m3.EFFECT: invention is featured by improvement of efficiency of the method of limitation of water inflow in the well and prolongation of the effect from its application.2 tbl
Justification method of input profile in injection well // 2610961
FIELD: petroleum industry.SUBSTANCE: justification method of an input profile in an injection well includes the pumping of a compound containing water suppression of polyacrylamide (PAA), cellulose ether, chromium acetate, and a filler into a shelf. Piolyanionic cellulose (PAC) or carboxymethyl cellulose (CMC) is used as a cellulose ether, the mass ratio of PAA and PAC or CMC is (1-4):1; solid microparticles of dolomitic powder or wood powder or zeolite-containing arterial with the concentration of 0.001-0.45 mass. % is used as a filler; after the pumping of the compound into a shelf, water solution fringe of a surface-active agent (SAA) and alkaline agent at the following mixture ratio, mass. %: SAA - 0.01-0.2, alkaline agent - 0.1-2.5, water - the rest, is additionally pumped; nonylphenol ethoxylate of complex SAA is used as SAA; sodium hydroxide or alkali salt is used as a alkaline agent, whereupon, the said compound and the fringe are pumped in a volumetric ratio of (2-5):1; the shelf is squeezed down by the pumped water in the volume of 10-20 m and the well is left for the process soak period of 4 days.EFFECT: increasing of efficiency of the method by means of reduction of an induction period of gel formation, improvement of strength performance of obtained compounds leading to the increasing of oil recovery from non-uniform permeable shelves, as well as the expansion of process capabilities of the method.3 tbl

ethod of developing oil and gas deposits // 2610485
FIELD: oil industry.SUBSTANCE: invention relates to the oil and gas industry and may find application in the development of oil and gas deposits where oil production is associated with a high risk of a breakthrough of gas from the gas cap. Method involves drilling of horizontal wells. In a horizontal section of oil wells set casing packers and autonomous or adjustable inflow control devices with the creation in the oil-saturated range of not less than 3 sections isolated from each other. Additionally, in the oil rim drill horizontal injection wells. Through them prior to the beginning of operation of oil wells perform pumping of pressure agent to create in the field of oil production of pressure above the initial reservoir one. Through this form the main fluid flow in oil wells in the lateral direction. Gas is produced through one or more horizontal wells in the gas cap angled or perpendicularly to oil producing wells. Extraction is carried out in volumes that allow to create in the gas cap of funnel of depression over the area of extraction of liquid fluids in the oil portion in the area of oil wells. This helps to maintain the stability of the gas-oil contact with a delay of time of formation of the gas cone. Design of the gas wells provides blind inserts located above the injection wells, with a length of at least one of the distance between oil-producing and injection wells preventing production of fluids in those intervals.EFFECT: technical result is the intensification of oil production and possibility of control over the movement of gas-oil contact to reduce the intensity of gas coning out of the gas cap in the development of oil rims below the gas cap.3 cl, 4 dwg, 2 tbl

ethod of determining moment of assigning well repair // 2608838
FIELD: oil industry.SUBSTANCE: invention relates to methods of determining moment of assigning well repair and can be used in gas and oil industry. Method involves measurement of difference between values of dynamic levels (Δh) at initial moment of well operation and at current moment. Then by mathematical formula, determining filtration area (F), plotting a curve of filtration area (F) versus well operation time (T) and at stable drop of gradient making a decision to assign well repair.EFFECT: technical result consists in determining optimum moment of assigning well repair.1 cl, 1 dwg

Counting device for selective gripping plugs // 2608649
FIELD: mining.SUBSTANCE: invention relates to drilling and completion of wells. Assembly with a counter for selective gripping plugs includes a controlled component. Counting component is installed with the controlled component, first, is located in the first position relative to the controlled component and moves relative to the controlled component. Locking element is used in a track formed between the controlled component and the counting component. Locking element is functionally made to ensure relative displacement between the controlled component and the locking element only in the first direction and between the counting component and the locking element only in the second direction. By at least one iteration of the counting component movement into the second position relative to the controlled component and back to the first position the locking element moves by certain pitches along the track. Controlled component is fixed with the counting component by the locking element, when the locking element comes to the end of the track.EFFECT: technical result is improvement of efficiency of the counting device for selective gripping plugs.23 cl, 9 dwg
ethod of extracting water-free oil using oil cone technology // 2606266
FIELD: oil industry.SUBSTANCE: invention relates to oil and gas industry and, in particular, development of deposits with contact water-oil transition zones (OWC). Method involves perforation of water-saturated formation zone below OWC. Water is taken from opened formation on forced mode until oil appears in extracted products – formation of oil cone. Perforated interval of water-saturated zone is isolated and further perforation of oil-saturated part of formation above OWC is carried out. Method includes further oil extraction to increase its water content – washing oil cone. When constant level of oil water content is achieved, when washing oil cone, well is stopped. Pump equipment is removed from well and equipment is lowered to determine new OWC level. Then said equipment is removed from well and existing perforation of oil-saturated part of formation is isolated. Method includes conservative perforated of interval of water-saturated zone of formation below new OWC level and forced extraction of water until oil appears in extracted products – formation of oil cone. Further, method includes isolating newly perforated interval of water-saturated zone and perforation of oil-saturated part of formation above new OWC level. Method then includes repeated extraction of oil to increase its water content above critical level – washing oil cone. Further steps are repeated on new OWC level.EFFECT: technical result is higher efficiency of using oil cone technology to increase production of water-free oil.3 cl, 2 dwg

System for selection of fluid used in subterranean well // 2604105
FIELD: mining.SUBSTANCE: group of inventions relates to mining and can be used for well selection of fluid. System comprises a fluid discriminator which selects through which of multiple outlet flow paths a fluid composition flows, selection being based on a direction of flow of the fluid composition through discriminator, and direction being dependent on a fluid type in fluid composition. Another fluid discriminator can include a structure which displaces in response to a fluid composition flow, whereby an outlet flow path of fluid composition changes in response to a change in a ratio of fluids in fluid composition. Method of discriminating between fluids can include providing a fluid discriminator which selects through which of multiple outlet flow paths a fluid composition flows in well, selection being based on a direction of flow of fluid composition through discriminator, and direction being dependent on a ratio of fluids in fluid composition.EFFECT: technical result consists in improvement of efficiency of selecting fluid in subterranean well.23 cl, 16 dwg

ethod of automatic control of coal-methanol well // 2604103
FIELD: gas industry.SUBSTANCE: invention relates to production of methane from coal beds and can be used in development and operation of coal-methanol wells using automatic process control. According to the method the well is connected to a control and power supply module. This module includes a pump control station with a frequency converter. Said station is made with the possibilities to control the pump capacity by changing the frequency basing on the downhole sensor data and controlling the annular pressure and the gas flow rate basing on the annular space pressure sensor. Method envisages opening/closing the throttle valve with an electric drive. Well is also connected to a metering and measuring unit module. It includes a gas and a water line with a throttle valve having an electric drive and a proportional-integral-differentiating regulator - PID-regulator, a shutoff valve with an electric drive. By means of them the well is controlled. For this purpose envisaged is the use of a program of development and operation of coal-methanol wells in the form of a data array. Data array is loaded into a centralized monitoring and control system. Herewith data are transmitted with a preset by the program time intervals in the automatic mode. Automatic adjustment is carried out by transmitting a supported parameter directly to the device for generating a control signal located in the metering and measuring module, in compliance with the program of development and operation of coal-methanol wells. At critical deviations of parameters of the well operation provided is its emergency shutdown in accordance with the program settings.EFFECT: technical result is the increase of quality and efficiency of development and operation of coal-methanol wells due to automatic maintenance of a well operation parameters as per a specified schedule, reduced cost due to elimination of manual adjustment of parameters of the well operation.1 cl, 1 dwg

Well bottomhole zone treatment method // 2601960
FIELD: oil and gas industry.SUBSTANCE: invention relates to oil production and, in particular, to methods of acid treatment of a bottomhole formation zone with subsequent well introduction into service. Method can also be used at wells workover and, in particular, when cleaning channels of the productive formation. Method involves the treated formation separation from the annular space of the well. Injection of an oxygen composition into the treated formation interval is performed. Process exposure is performed. Reaction products are swabbed and extracted from the formation. Well killing is carried out. Pump unit is lowered and the well operation is started. Herewith, before separation of the treated formation from the annular space a tubing string is lowered into the well with an open end provided with a check valve and with two packers for separation of the treated formation interval from the annular space and from the bottom or from another formation in the well. Tubing string above the lower packer is equipped with a setting tool - ST. Well circulating valve is set above the upper packer. After the process holding both packers are reset above the interval of the treated formation. Well killing is carried out through the borehole circulation valve by replacement of fluid in the annular space of the well and in the tubing string with a killing fluid. Then the upper packer is removed. Prior to lowering into the well the pump unit by means of the ST the tubing string is disconnected from the lower packer and the above said tubing string is removed from the well.EFFECT: provided is maintaining of collection properties of the bottomhole zone of a productive formation at the use at the killing stage of any types of killing fluids.8 cl, 2 dwg

ethod of suspending steel polymer flexible flush-joint pipe in well // 2601078
FIELD: oil and gas industry.SUBSTANCE: invention relates to oil and gas industry, particularly to operation of wells at final stage of development, particularly to operation self-killing gas wells. Method for suspension of SPFP in well includes closing master valve of X-mas tree and dismantling of part of X-mas tree, located above master valve, installing suspension assembly and valve, crimping thereof, arrangement of ground equipment, assembly of blowout preventer and injector, filling steel polymer flush-joint flexible pipe (SPFP) into injector, sealer, preventer, opening valve, lowering SPFP until when upper end of SPFP reaches injector, connection of SPFP with crossbar, final lowering and attachment of SPFP in suspension assembly, its crimping, disconnection of crossbar from SPFP, its extraction from well, dismantling injector, seal and unit of preventers, mounting X-mas tree, creation of excess pressure. Upper end of SPFP is connected by means of a sleeve adapter in form of a collet-fitting device, then crossbar is screwed onto coupling adapter and SPFP is mounted in suspension assembly by placing in mounting seat of suspension assembly with rigid securing thereof against axial movement through stop nut of coupling adapter.EFFECT: technical result consists in prevention of vertical movement of SPFP, as well as possibility of quick disconnection of coupling adapter in form of collet-fitting device from SPFP during change of point of suspension thereof in a repaired well.1 cl, 4 dwg

Flow control device // 2600401
FIELD: oil and gas industry.SUBSTANCE: invention relates to equipment for completion of oil and gas wells, in particular for control of well fluid influx at a separate section of the well. Device comprises a housing consisting of top and bottom parts interconnected by a threaded connection, an axial inlet and radial outlets, an inlet into the secondary channel in the top part of the housing made in the form of a groove, in which there is a porous element, a system of capillary channels in the axial direction made in walls of the housing, a movable element, a collet and a nozzle of small diameter. In the housing bottom part the capillary channels are combined into a cavity between the movable element and the bottom part of the housing.EFFECT: higher reliability of the device operation due to simplification of the design and reducing its height.1 cl, 2 dwg

Equipment for production and increase of production of crude oil and gas // 2599674
FIELD: oil and gas industry.SUBSTANCE: invention relates to equipment for production and increase of production of crude oil and gas. Proposed equipment comprises: a connecting unit connected with the main piston rod, herewith the main piston rod performs reciprocating movements inside the main cylinder; a piston unit connected with the connecting unit, herewith the piston unit moves in connection with the main piston rod to produce an extra amount of produced objects; a cylinder unit creates pressure for lifting the produced objects to the ground surface, when the piston unit performs reciprocal movements inside the piston unit; and a supply unit to control the process of transporting the produced objects by lifting the produced objects to the ground surface, when the piston unit moves upwards, and transporting the produced objects to a storage facility, when the piston unit moves downwards.EFFECT: technical result is the increase of production of crude oil and gas.7 cl, 8 dwg

onitoring, diagnosis and optimisation of gas-lift operations // 2599645
FIELD: oil and gas industry.SUBSTANCE: invention relates to means for optimisation of gas-lift operations. Disclosed is a method for monitoring, diagnosis and optimisation of operation of gas-lift system, which includes collecting measurement data, representing state of gas-lift system, storing measurement data, comparison of measured data with calculated well model data for well and identification of conditions of gas-lift system based on discrepancies between measurement data and calculated data. Method further includes updating model to reflect probable conditions and selected corrections of probable conditions, generation of curves of efficiency of gas-lift system using updated model and presenting to user actions recommended to achieve stable performance of gas-lift system with operating point of gas-lift system on at least one of multiple curves of efficiency of gas-lift system.EFFECT: higher quality of optimising gas-lift operations.20 cl, 9 dwg

X-tree control method and device therefor // 2596175
FIELD: gas industry.SUBSTANCE: invention relates to gas production industry and can be used in automatic control of processes and is intended to improve reliability of operation of gas producing wells. Disclosed is a method of controlling an X-tree of a hydrocarbon well located on sea ice-proof platform and is intended for extraction of formation fluid and detection of fire in mouth of wells. Operation of multiple wells is controlled simultaneously. For actuation of downhole cutoff valve, master and side gate valves, method uses hydraulic fluid, operating pressure of which is created by means of hydraulic pump. Hydraulic fluid supply control into drives of downhole cutoff valve, side and master valve is performed by means of electromagnetic distributors of high pressure, controlled by means of signals of a controller, which are obtained after preliminary analysis of signals of sensors monitoring parameters of station, wherein method provides subsequent opening of valve actuator only after removal/acknowledgement of emergency commands on panel of fire module operator and emergency situations or panel of operator of automatic process control system.EFFECT: control system of underground cutoff valve, side and/or master valve of each well provide shut off all wells with absence/disappearance of supply voltage of control station.11 cl, 12 dwg

ethod for development of deposit complicated by vertical interruptions // 2595105
FIELD: oil and gas industry.SUBSTANCE: invention relates to oil and gas industry, specifically to development of stratified oil deposits, complicated by vertical interruptions, displacement of working agent. Method comprises determining hypsometric marks of formation. Placing vertical and horizontal production, injection wells, except zones of maximum fall of hypsometric marks of formation in immediate vicinity of faults. Vertical producers are arranged along them. Displacement agent is injected into injection wells and product is extracted from production wells. Vertical producers are transferred into injection wells with decrease in flow rate below level of efficiency. Additional horizontal boreholes are drilled, directed towards fracture line. Method includes determining impermeable boundaries of faults in deposit, splitting formation into sections with different formation pressure. Before transfer of flooded production wells for injection of working agent to maintain formation pressure additional horizontal boreholes are drilled with opening of non-permeable boundary of faults of flooded section of formation with higher bed pressure in oil-bearing formation section above level of oil-water contact. Method comprises performing overflow of fluid from one section of formation in other section with low formation pressure on additional horizontal boreholes. Volume of pumped from surface of displacement agent through injection wells in area with low pressure is reduced.EFFECT: technical result is increased efficiency of development due to saving working fluid and energy for pumping in oil-bearing section of formation of liquid and energy of adjacent sections.1 cl, 1 tbl, 1 ex, 1 dwg

Process fluid for well killing based on alcohols // 2595019
FIELD: oil and gas industry.SUBSTANCE: invention relates to oil and gas industry and can be used during killing of oil-producing wells before overhaul, development, perforation. Process fluid for well killing based on alcohols containing oxal T-92 floatation agent, according to the invention additionally contains polyfluorinated trihydrooktafluoroamyl alcohol-telomere in the following proportions, wt%: polyfluorinated trihydrooktafluoroamyl alcohol-telomere 2-75, oxal T-92 floatation agent 25-98.EFFECT: wider range of the fluid density change, preservation of filtration-capacitance parameters of productive reservoirs due to inhibition of clay minerals hydration.1 cl, 2 tbl, 1 ex

Flow resistance control system intended for use in underground wells // 2594409
FIELD: oil industry.SUBSTANCE: group of inventions relates to a flow resistance control system intended for use in underground wells. Said system can comprise means installed with possibility of movement under action of the multicomponent fluid flow. At change of ratio of target fluid and undesired fluid in the above multicomponent fluid the resistance to multicomponent fluid flow is changed. Other system can comprise means installed with possibility of rotation under action of multicomponent fluid flow. Fluid flow switch is designed to deflect said multicomponent fluid relative to at least two flow lines. Present invention relates to adjustment of flow resistance in underground well, which can provide movement of said agent under action of multicomponent fluid flow and change of multicomponent fluid flow resistance in response to change of ratio between target fluid and undesired fluid in the above multicomponent fluid. Systems of flow resistance control can use swelling materials and elements with aerodynamic profile.EFFECT: technical result consists in improvement of efficiency of controlling flow resistance.61 cl, 27 dwg

Downhole hydraulic pump // 2594375
FIELD: engines and pumps, mining.SUBSTANCE: present invention relates to a downhole hydraulic pump for providing fluid pressure during downhole operations. Pump includes a housing, a cam shaft. Cam shaft is rotatably arranged in the pump housing and has a longitudinal spin axis. Cam shaft comprises a shaft with cam lobe. Piston is arranged radially to the cam shaft. It has a housing arranged in the pump housing. Pump housing has an inlet valve arranged in the inlet hole and an outlet valve arranged in the outlet hole. There is a spring arranged in the pump housing for moving the piston against the piston housing. Piston housing can be rotated around the piston housing rotation axis parallel to the longitudinal spin axis of the cam shaft.EFFECT: to increase the hydraulic horsepower of a downhole hydraulic pump.20 cl, 8 dwg

ethod of leveling of profile of water injection wells // 2592916
FIELD: oil industry. SUBSTANCE: invention relates to development of oil fields, and specifically to methods of leveling of injection which open differently permeable bed intervals. Assigned task is solved by the fact that the offered method of leveling of profile of water injection well, which includes successive pumping of fringe of SPC - stitched polymer composition based on copolymers of acrylamide and acrylic acid with the stitcher - salt of trivalent chromium with addition of CS - cationic surfactants, distinguished by that CS solution fringe is pumped after SPC fringe, in which CS is added. Acid fringe or solvent fringe and acid fringe is pumped additionally between SPC fringe, in which CS is added, and CS solution fringe. EFFECT: technical result consists in improvement of efficiency of the method of leveling of profile of water injection well due to increase of isolation of highly permeable intervals and redistribution of water injection to low-permeable intervals. 1 cl, 3 dwg, 2 tbl

ethod for operation of marginal well // 2592590
FIELD: oil and gas industry. SUBSTANCE: method is implemented by periodic opening of channel between cavity of tubing string and annular space. Tubing is equipped with valve, located above hole pump above liquid dynamic level, parallel to axis of tubing string, which valve is made in form of cylindrical valve box and shutoff element, made from material with density less than density of pumped oil. Upper part of said box is hydraulically connected to tubing string and bottom, to annular space. EFFECT: continuous operation of marginal well is provided. 1 cl, 2 dwg

ethod for adaptive automatic control of gas condensate wells // 2591870
FIELD: oil and gas industry.SUBSTANCE: invention can be used to control operating modes of gas producing well. Control of operating modes of gas producing well is formed on the basis of an adaptive pulse regulator acting on a time quantizer, in which there happens locking of control signal magnitude uimi(t) during a given period (unit) of time with further action on the actuator mechanism controlling the regulating valve changing the amount of gas fed into the collector, ensuring quantized signal ukv. At that, the adaptive regulator has control law where kI, kD are coefficients of integral and proportional components of PID regulation law, kP(t) -common transmission coefficient, which varies according to equations: kP(t)=kH+γy(t), Tay′(t)+y(t)=uPIDa,kv(t), where filtration time Ta is calculated in standard units, and kH>0 and γ>0 are adjustable parameters of the adaptive regulator.EFFECT: increasing of resource of technical means of automatic elements.1 cl, 11 dwg
ethod of emergency killing of flowing gas well in presence of permafrost rocks // 2591866
FIELD: oil and gas industry.SUBSTANCE: invention relates to oil and gas industry, namely to an emergency killing of flowing gas wells in presence of permafrost rock (PFR). Method involves perforation interval locking by feeding on bottom hole and in well bore-hole formation zone via tubing string locking composition and further killing liquid injection into well, such as water-methanol solution. First, into well via tubing string is pumped liquid mixture of proppant, shut on water-methanol solution (WMS), taken in ratio of methanol:water equal to 40:60, in the following ratio of proppant and WMS 1:1 to form at bottom hole and bottom hole formation zone structure-forming array. As plugging composition is compound shut on said WMS, including, wt%: bentonite clay powder - 3-8, chalk - 0.5-1.5, PAC-VV - 0.2-0.5, soda - 0-0.5. Blocking composition is pressed to formation depth killing fluid with filling well bore.EFFECT: technical result consists in reduction of duration and improvement of efficiency of killing flowing gas wells under conditions of PFR without thawing, eliminating abrupt reduction of killing liquid level in the well and emission of tubing string, reduction of probability of open gas blow-out and fire, and when it occurs in fast termination of gas inflow and elimination of flowing.1 cl

Downhole gas bypass valve // 2591309
FIELD: machine building.SUBSTANCE: valve includes connected on both ends with tubing string coupling with side hole, where valve body is built with bypass hole. Body is made in form of stepped cylinder, and in said cylinder there are coaxially arranged in series a nut with central stepped hole and a sharp end edge, spring-loaded slide valve with longitudinal channels on periphery, a sealing gasket and locking element in form of a bolt with a conical tip. Slide valve with sealing gasket can interact with face edge of nut, and shutoff element, simultaneously holding sealing gasket on slide valve, on closing bypass holes of body limits stroke and further compression spring. Body with outer side is equipped with top and bottom vertical gusset plates. Slide valve, spring and valve shutoff element are made of stainless material and sealing gasket is made from polyurethane.EFFECT: higher efficiency of device for gas bypass.2 cl, 1 dwg

Single packer unit for simultaneous-separate extraction of fluid from two formations of one well (versions) // 2591225
FIELD: oil industry.SUBSTANCE: group of inventions relates to oil production and can be used for simultaneous-separate extraction of well fluid from two formations of one well. Plant with first version contains deployed in casing pipe on flow column packer with two anchor devices oppositely directed action, centrifugal pump with receiving module and submersible electric drive connected power cable with the control station (CS), tightly passed through wellhead equipment, adjusting electric valve (AEV), which includes shank with cutoff of fluid flow with locking seat, and sensors of telemetry system (TMS), and interfacing unit connected with device taking fluid from lower formation and consisting of telescopically coupled union installed on packer, and nipples, docked to shank, connected to electric drive end. In shank wall are made through holes connecting space above packer with packer and bottom formation. Shank is equipped with centralizer, providing connection of nipple and union. AEV TMS is connected with control panel (CP) by electric communication cable, tightly passed through wellhead equipment. According to second version, proposed plant comprises packer with cable entry and support anchor device, well chamber with flow channel, outside which there is rack, and coupling cross flow of fluid flows, communicating radial channels with upper formation. Well chamber is connected to one side with flow channel to communicate flow channel chamber with flow column, and on other is coupling with at least two eccentric flow channels, connected with packer by above-packer pipe. One of eccentric coupling channels communicates chamber flow channel with pump outlet through shank and branch pipe, conjugated with central channel cross flow coupling and forming together with above-packer pipe and barrel packer coaxial channel, communicating with radial channels cross flow coupling, attached to end of packer and below-packer pipe connected to pump. Other eccentric channel coupling connects the space above and below packer is through shutoff AEV seat, coaxial channel and radial channels cross flow coupling.EFFECT: technical result consists in simplification of design and higher reliability.2 cl, 2 dwg

ethod of developing well oil reservoir with horizontal termination // 2590918
FIELD: oil and gas industry.SUBSTANCE: invention can be used in developing heterogenous terrigene or carbonate producing beds with horizontal wells. In method of oil formation development with horizontal wells drilling or selection of already drilled horizontal well are carried out. Extracted at horizontal shaft intervals of productive formation, differing in properties. Tubing string is run in well with packer. Separated intervals of productive formation with packer. Pump, control devices in form of electric valves and pressure gauges-thermometers are lowered into well. Product is lifted to surface using pump via inter-tube space. Preliminary between intervals of productive formation there equipment for well local reinforcement is installed. Layout is lowered into well, consisting of packer, tubing string, casing valve equipment with lower electric valve for regulation of inflow via tubing string, pressure gauge-thermometer for measurement of pressure in tubing string in front of housing, upper electric valve for regulation of inflow from annular space in cavity of housing, pressure gauge-thermometer for measurement of annulus pressure, pressure gauge-thermometer for measurement of pump suction pressure and tubing string to wellhead. Development of well is performed in three stages with extraction of product via tubing string and annular space, only via tubing string and then only through annular space. Results of yields and water cut measurements are analysed. Interval of well is operated with lower water cut at shutdown interval with high water cut at initial high flow rate until bottom hole pressure and fluid level below optimum and during subsequent working flow rate with maintenance of stable bottom hole pressure. Well is operated to excess water cut of operated interval above water cut of second interval. Then both intervals are operated simultaneously and watering of both intervals is maintained at same level.EFFECT: improvement of oil resources withdrawal along horizontal shaft of production well.1 cl, 1 ex, 1 dwg

Self-contained valve equipped with temperature-sensitive device // 2588104
FIELD: mining.SUBSTANCE: group of inventions relates to mining and can be used for regulation of inflow to production pipeline. A valve or flow control device for control on basis of Bernoulli effect, fluid flow from one area or region to another, in particular for controlling flow of fluid, such as oil and/or gas containing water from oil or gas reservoir in mining wells pipeline oil and/or gas reservoir, from inlet on inlet side to outlet side of device at outlet. Valve comprises a movable valve element configured to actuation temperature sensitive device. Valve gate is made with possibility of its movement sensitive to temperature device in closing direction in response to excess of specified value of temperature of fluid surrounding valve and/or incident inside valve. Valve device is designed so that temperature sensitive device comprises an expanding mechanism, which is a sealed structure at least partially filled with expandable material. Said expandable material, and therefor said expanding mechanism, are configured to, in excess of a predetermined value of fluid temperature to expand and thereby cause movement of movable valve shutter in closing direction. Valve has a passage of flow from inlet to outlet, a portion of which directs fluid flow along surface of movable valve shutter so as to be capable of autonomous movement of movable valve shutter control based on Bernoulli effect said fluid flow when movable valve element is not moved temperature-sensitive device in direction of closure.EFFECT: technical result is to improve efficiency of control of pipeline flow.16 cl, 7 dwg

ethod and apparatus for controlling flow of fluid entering conduit // 2587675
FIELD: mining.SUBSTANCE: group of inventions relates to mining and can be used to control fluid flow. Method includes steps of: reducing inflow into said production pipe locally from hot spots using inflow control devices comprising a movable body provided within a housing, movable body being arranged to adjust flow of fluid through inflow control devices autonomously by exploiting Bernoulli principle; increasing inflow into said production pipe remote from said hot spots using said inflow control devices to increase inflow locally; and increasing draw down in said production pipe by using an injector to inject a gaseous medium at or downstream of said inflow control devices.EFFECT: technical result is improved efficiency of fluid flow control.24 cl, 8 dwg

Apparatus and method for controlling flow // 2585773
FIELD: oil industry.SUBSTANCE: group of inventions relates to oil and gas industry, in particular to regulation of fluid flow in pipe strings in wells. Device includes a casing with one or more formed openings; a valve component which can be combined and removed from alignment with said one or several holes in said casing; and one or more plugs installed in one or several holes, where in each hole there is one plug to enable lowering of said valve component in an open position relative to holes. Each plug can be decreased as a result of one or more effects of well fluids and supplied solvent fluids. Plug material includes a continuous cellular nanomatrix, a plurality of dispersed particles containing core material particles and distributed in said cellular nanomatrix, and a solid jointing layer between dispersed particles.EFFECT: reduced number of trips for performing process operations in well.18 cl, 7 dwg
 
2551030.
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