Method of operation of oil-well jet pump

FIELD: oil industry.

SUBSTANCE: method comprises setting the jet pump into the well. The housing of the pump is provided with the central nozzle, openings for inflow of fluid, and radial passages. The openings for inflow of fluid are shut off by means of valving members. The jet pump is mounted between the top and bottom oil-bearing beds.

EFFECT: enhanced efficiency.

2 dwg

 

The present invention relates to the oil industry, mainly to well pumping units for oil extraction from wells, and can be used in the operation of the multilayer oil.

It is known that simultaneously separate operation of the two reservoirs, one well may be accompanied by their unequal development. The reservoir with high pressure and productivity can significantly reduce the drainage of fluid from the reservoir with a lower pressure. In particular, conditions can be created complete cessation of flow of fluid from the reservoir with a lower pressure due to the high dynamic fluid level in the well created by the reservoir with high pressure.

To ensure the independence of the work of the layers and the required output of the known device for simultaneously dual completion wells [1, 2]. They allow for the pumping of liquids two pumps for the Autonomous transport channels.

The disadvantage of the devices is the complexity of the equipment, the need for drilling larger diameter, large energozatrat to drive the two pumps.

Closest to the invention to the technical essence and the achieved result is the method of operation with the use of jet pump [3]. The jet pump substantially hydrocarbon which increases the lifting height of the oil, pumped by centrifugal pump. However, the known method does not allow to simultaneously separate operation of two reservoirs one centrifugal pump.

Task to be solved by the present invention is directed, is the intensification of development of the reservoir with a small pressure and productivity in the extraction of oil from two layers of one well.

This is achieved in that in the method of operation of a downhole jet unit when operating multilayer deposits, namely, that in a well set ESP and fixed in the well with the packers to the jet pump, which body has a Central nozzle and there are openings for the entrance of fluid, overlapping each locking elements and the radial channels, the jet pump installed in the interval between the upper and lower oil reservoir, the packers have so that the upper oil layer was located between them, and the lower oil reservoir is located below the lower packer, when the lower layer has a large reservoir pressure and productivity of the reservoir fluid is the bottom of the object of development, as an active medium is delivered to the Central nozzle of the jet pump, through passive movement of fluid from the upper oil reservoir, and in the case when the upper layer region which gives a large reservoir pressure and productivity compared with the lower layer liquid of the upper layer, being already active medium, through the open radial channels enters the Central nozzle, and the liquid from the bottom of the reservoir, being already a passive environment, with the outer sides of the radial channels ejectives active medium into the jet pump.

Figure 1 shows the diagram of the downhole jet unit when the lower layer has a high pressure and productivity. Figure 2 presents the diagram of the downhole jet unit, when the upper layer has a high pressure and productivity.

Downhole jet installation includes the well 1, electrical submersible pump 2 for pumping fluid, the housing 3 jet pump, mounted in the well with the help of packers 4 and 5, the jet pump 6 with a Central nozzle 7, the holes 8, 9, 10, 11, 12 for the entrance of fluid, overlapping each locking elements (shown conventionally), radial channels 13, 14. The upper oil layer 15 is located between the packers 4 and 5, and the lower oil reservoir 16 is located below the lower packer 5. Packers 4 and 5 allow us to divide the layers 15 and 16.

Method of downhole jet unit allows to simultaneously separate operation of two oil reservoirs.

Method of downhole jet unit as follows. Figure 1 illustrates the case in which the lower layer 16 has a greater reservoir of the new energy and productivity. The reservoir fluid is the bottom of the object of development is in this case, the active medium and enters the Central nozzle 7 through the open hole 12 and getting into the jet pump 6, involves passive movement of fluid from the upper reservoir 15 through the receiving apertures 8 and 9. Holes 10 and 11 are thus blocked. Thus, the flow of fluid from the lower reservoir 16 contributes to the drainage of the upper reservoir 15 through ejection, created by the fluid flow of the lower layer.

Figure 2 shows the downhole jet unit, where in contrast, the top layer 15 has more energy and productivity in comparison with the lower layer 16. In this case, the active medium of the upper layer through openings 10 and 11 and the radial channels 13 and 14 enters the Central nozzle 7 devices. Holes 8, 9 and 12 remain closed. Fluid from the lower reservoir 16, as already passive environment, with the outer sides of the radial channels 13 and 14 are absorbed by the active medium in the jet pump 6. Then all the liquid is supplied to the receiving ESP.

Thus, both options allow you to due to a larger reservoir pressure and productivity one of the reservoirs to drain the fluid from the reservoir to a lower reservoir pressure and to introduce oil in the dual development.

List of used sources

1. CENTURIES Ledovskaya and other Topic of the effectiveness of dual method of operation of wells in the oil fields of Bashkortostan. Trebucheeeeeet, W, 1972, s-373.

2. Emiliou. On the relationship of the method of operation of wells with the system parameters of the oil field development. Trebucheeeeeet, V, 1974, p.59-65.

3. Amorous. The study wells in conjunction dual completion wells. In the book: The calculations in the oil. M., Nedra, 1969. s-102.

Method of downhole jet unit when operating multilayer deposits, namely, that in a well set ESP and fixed by means of packers the jet pump, which body has a Central nozzle holes for intake of the fluid and the radial channels, characterized in that the openings for entry of the liquid jet pump overlap each locking elements, the jet pump installed in the interval between the upper and lower oil reservoir, the packers have so that the upper oil layer was located between them, and the lower oil reservoir is located below the lower packer, when the lower layer has a large reservoir pressure and productivity, the reservoir fluid is the bottom of the object of development, as an active medium, comes into the Central nozzle of the jet pump, engages in the passive movement of fluid from the upper oil reservoir, and in the case when the upper layer has a large reservoir pressure and productivity compared with the lower layer, the upper liquid layer, being already active medium, through the open radial channels enters the Central nozzle, and the liquid from the bottom of the reservoir, being already a passive environment, with the outer sides of the radial channels ejectives active medium into the jet pump.



 

Same patents:

FIELD: oil industry.

SUBSTANCE: method comprises assembling pipe column and running the assembly into the well. The packer is set above the roof of the intermediate bed. The sealing unit is set in the step through passage of the jet pump. The logging instrument is run with the use of the logging rope passing through the sealing unit and is set in the zone of productive bed. During the run, the background values of physical fields of the rock along the well are recorded. .

EFFECT: enhanced efficiency and reliability.

2 cl, 3 dwg

FIELD: lifting liquid media from wells.

SUBSTANCE: proposed pumping unit includes tubing string with upper and lower packers. Upper packer is installed higher than top of upper productive stratum, and lower packer is arranged between upper and lower productive strate. Fitted on tubing string is support with bypass ports and seat for mounting detachable jet pump. Nozzle of jet pump, being installed on seat from side of inlet, communicates with inner space of tubing string lower than jet pump and from side of outlet at outer side communicates with upper productive stratum. Unit has valve unit and check valve installed in tandem from top to bottom between jet pump and lower packer. Centrifugal pump is connected to lower end of tubing string. Lower packer is arranged maximum 10m lower than surface of upper productive stratum, and upper packer, maximum 10 m higher than its top. Support of jet pump permits mounting of locking insert.

EFFECT: improved efficiency of pumping out media at variable operating conditions of upper and lower productive strata with possibility of intensification of influx rate of medium pumped out of upper productive stratum.

2 dwg

FIELD: petroleum processing.

SUBSTANCE: method consists in distillation of petroleum feedstock on rectification column to produce bottom residue, distillate vapors, and at least one side-cut distillate. Circulating reflux liquid is likewise withdrawn from rectification column below side-cut distillate exit level, which is cooled and returned into rectification column above its exit level. Tapped side-cut distillate is passed to stripping column, from bottom part of which liquid fraction of side-cut distillate is discharged and, from top part thereof, side-cut distillate are withdrawn to be then ejected and returned into rectification column. Circulating reflux is fed as ejecting medium into liquid-gas jet apparatus, by means of which side-cut distillate fraction vapors are pumped out of stripping column and then condensed in liquid-gas jet apparatus. Mixture formed therein is directed to rectification column as circulating reflux liquid below side-cut distillate exit level. Installation for production of petroleum fraction comprises rectification column provided with petroleum feed supply lines and lines for withdrawal of vapors from top part of rectification column, withdrawal of bottom residue, withdrawal of circulating reflux liquid, supply of circulating reflux liquid into rectification column, and at least of one line to withdraw side-cut distillate. In addition, installation comprises stripping column, pump, and heat exchanger/cooler. Pump entry is connected to line for taking off circulating reflux liquid from rectification column and circulating reflux liquid supply line is connected to rectification column above aforesaid circulating reflux liquid takeoff line and below side-cut distillate withdrawal line. The latter is linked to stripping column provided with conduit to withdraw liquid fraction of side-cut distillate and conduit to withdraw vapors of light fractions of side-cut distillate. Installation is further provided with liquid-gas jet apparatus. Pump exit communicates with liquid medium inlet in liquid-gas jet apparatus through heat exchanger/cooler. Conduit for withdrawal of light fractions of side-cut distillate from stripping column is linked to gas inlet in liquid-gas jet apparatus, which, through mixture exit, communicates with circulating reflux liquid supply line or with rectification column below side-cut distillate discharge line. In another embodiment of installation, pump entry is connected to line for taking off circulating reflux liquid from rectification column. In this case, installation is also provided with liquid-gas jet apparatus, pump to supply ejecting medium, and vessel. Conduit to withdraw vapors of light fractions of side-cut distillate from stripping column is connected to gas inlet of liquid-gas jet apparatus, which, through liquid medium inlet, is connected to ejecting medium supply pump and, through mixture outlet, to vessel, which communicates with circulating reflux liquid supply line or with rectification column below side-cut distillate discharge line. Ejecting medium supply pump entry is connected to vessel and pump exit communicates through heat exchanger/cooler with liquid medium inlet in vessel and/or with ejecting medium supply pump entry.

EFFECT: reduced power consumption and improved quality of petroleum products from rectification column side-cut distillates.

6 cl, 2 dwg

FIELD: oil production, particularly to produce oil from well characterized with high and ultrahigh gas factor.

SUBSTANCE: method involves pumping-out product from formation to well; partially separating free gas from liquid; supplying gas-liquid mix containing residual gas to pump and injecting thereof to jet device nozzle; ejecting part of well product by jet device from hole annuity into tubing string; supplying part of gas in hole annuity; elevating product to day surface and regulating pressure in hole annuity. Gas-liquid mix containing residual gas is dispersed before gas-liquid mix supplying into pump. During gas-liquid mix supplying into jet device pump gas-liquid mix jet is shaped to prevent acoustic nozzle chocking. Device comprises pump and jet device connected to tubing string and lowered in well. Gas-separation and dispersion unit is installed at pump inlet. The jet device is provided with nozzle of diaphragm type.

EFFECT: increased efficiency and extended field of application for pumping-ejector oil production by elimination of hazardous residual gas influence on pump operation and prevention of acoustic jet device nozzle chocking during gas-liquid mixture injection.

8 cl, 5 dwg

FIELD: oil producing industry; pumping facilities.

SUBSTANCE: according to proposed method, jet pump with stepped passage channel in its housing and packer of pump with thorough passage channel and stem with inlet funnel are lowered into well on tubing string. Releasing of packer is carried out with packer installed higher than producing formation. Locking insert with central through channel is installed in stepped through channel and hydraulic fracturing fluid is pumped into producing formation. Then locking insert is lifted to surface and flexible pipe is lowered into well through tubing string passing it through sealing unit with possibility of displacement relative to sealing unit. Lower end of flexible pipe is set lower than or at level of lower perforated zone of producing formation. In process of lowering, sealing unit is installed in through channel of jet pump. Liquid working medium is fed into nozzle of jet pump along well annulus, and draining of producing formation is carried out by creating depression in under-packer space of well. Washing fluid for washing well bottom is delivered into well simultaneously or after building of stable depression on producing formation, and ratio between value of pressure in flexible pipe and pressure of liquid medium in medium in well annulus is maintained less or equal to 0.98. After pumping out of fluid from producing formation in amount equal to not less than two amounts on hydraulic fracturing fluid pumped into producing formation, delivery of washing fluid into flexible pipe is stopped. Then not earlier than in 5 min, delivery of working fluid into nozzle of jet pump is stopped, flexible pipe with sealing unit are taken out of well and, using jet pump investigation of producing formation for estimation its productivity is done. The well is put into service.

EFFECT: intensification of investigation, testing and preparation of well for operation with increased reliability of data stating readiness of well for operation under working conditions.

2 dwg

FIELD: fluidics.

SUBSTANCE: method comprises supplying a portion of the cooled fluid flow to the system of heat supply and a portion of water equivalent to that supplied to the consumer to the inlet of the fluidic apparatus from the system of water supply. The plant is provided with the accumulating tank that is connected with the water supply system and to the heat-consuming device from the side of supplying heated fluid to the device and from the side of discharging cooled fluid flow from it to permit the flow of the heated fluid to the accumulating tank, mixing it with the cold water from the water supply system, and discharging the mixture produced from the accumulating tank to the system of hot water supply.

EFFECT: expanded functional capabilities.

1 dwg

FIELD: borehole jet plants, particularly for gas production.

SUBSTANCE: method involves mounting inlet funnel, packer and jet pump having body with inlet channels for gaseous medium and medium to be pumped, as well as through-pass channel with seat arranged between stages; lowering above assembly into well so that inlet funnel is arranged above perforation roof of productive formation; removing packer; lowering well-logging device suspended to borehole cable in productive formation zone through through-pass channel, wherein the well-logging device is lowered along with sealing unit preliminary connected to borehole cable; installing sealing unit on seat in through-pass channel of jet pump so that borehole cable may reciprocate through the sealing unit; recording geophysical parameters of production formation within interval defined between inlet funnel and well bottom; creating differential pressure drawdown by supplying high-pressure gaseous medium in active nozzle through hole annuity; draining well within 4-10 hours along with liquid medium pumping out from the well bottom; recording geophysical parameters within interval defined by well bottom and inlet funnel when jet pump is in its working state; lifting well-logging device and borehole cable from the well; lowering rock drill or device, which applies acoustic action on the formation, connected to borehole cable into production formation interval and secondarily penetrating in the formation or cleaning well bore zone by applying acoustic action in drawdown mode or by providing hydraulic action on formation in which drawdown is alternated with overbalance when jet pump is in its working state; removing rock drill or device which applies acoustic action on the formation along with removing borehole cable and installing insert for recording change of formation pressure buildup having independent manometer and channel for medium to be produced from the well, wherein the channel is provided with check valve; creating differential pressure drawdown by supplying gaseous medium into active nozzle of jet pump; stopping gaseous medium supply into the active nozzle after formation drainage termination to separate well spaces above and under the packer by closing check valve of the insert; recording change of formation pressure buildup in well space under the packer by manometer; removing the insert and manometer from the well; isolating pipe string interior from hole annuity by installing blocking insert with through-pass channel in through-pass channel and bringing the well into flush operation mode through jet pump. The described method is used in the case of well yield reduction.

EFFECT: increased operational reliability and output from gas-condensate wells.

FIELD: oil producing industry.

SUBSTANCE: according to proposed method, intake funnel, liner, packer, two-section with bypass ports in upper section and axial two-step through channel with seat in each section are installed on tubing string. Said assembly is lowered into well and releasing of packer is carried out. Complex geophysical instrument is lowered on logging cable. When lowering complex geophysical instrument, background values of physical fields in well and parameters of well for tying formation perforation internal are measured. Then complex geophysical instrument is lifted from well, and device for secondary formation tailing-in is lowered on logging cable into well. Secondary formation tailing-in device includes perforator and gas generator module containing at least two chambers with powder charges. Ejecting device with replaceable nozzles and diffusers is installed for movement over formation tailing-in device. Formation tailing-in device is installed opposite to chosen formation interval, and ejecting device is set on seat in upper section of support and, using ejecting device, preset drawdown is created and perforating of formation is carried out. Then powder charges are kindled and powder gas pressure acts through perforation channels onto formation to form vertical cracks. Logging cable with remnants of perforator and ejecting device is lifted device is lifted and complex geophysical instrument with ejecting device movably installed over complex geophysical instrument is lowered into well. Ejecting device is installed in support on seat in upper section, and records of fields is carried out when lowering complex geophysical instrument. Using ejecting device, draining of well is carried out by delivering working agent to nozzle of ejecting device for 4-10 hours. When stable depression is attained, well production rate and bottom hole pressure are measured. With ejecting device operating, records of fields and composition of fluid are taken at moving of complex geophysical instrument. Delivery of working agent is stopped and logging cable, complex geophysical instrument and ejecting device are taken out. Blocking insert is installed on seat in upper section of support to close bypass ports of support. Hydraulic fracturing liquid is pumped into formation through blocking insert, then insert is taken out and complex geophysical instrument with ejecting device is lowered on logging cable into well. Ejecting device is set on seat in upper section, and records of fields are carried out using complex geophysical instrument. Complex geophysical instrument is lifted to intake funnel and draining of formation is done by ejecting device until hydraulic fracturing liquid with reaction products and formation medium in amount equal to two-fold volume of hydraulic fracturing liquid pumped into formation is pumped out. Record of bottom-hole pressure and well production rate are taken periodically. Samples of media are taken. With ejecting device operating, records of fields and composition of fluid are taken by complex geophysical instrument. Higher depression is built on formation and records of fields and composition of formation media along well are taken when lifting complex geophysical instrument. Then delivery of working agent to nozzle of ejecting device is stopped, and logging cable, complex geophysical instrument and ejecting device are taken out. Insert with self-contained pressure gauge and sampler are installed on seat in lower section of support, and ejecting device with channel to supply pumped out medium stopped in upper part is installed in upper section of support. Working agent is supplied to nozzle of ejecting device, draining of well is carried out, and delivery of working agent is stopped and records of pressure build-up curves in underpacker space of well are taken at completion of which ejecting device and insert with self-contained pressure gauge and sampler are taken out and operations for setting well in service are carried out.

EFFECT: enlarged operating capabilities, increased capacity of plant.

3 cl, 4 dwg

FIELD: continuous operation ejection installations.

SUBSTANCE: ejection installation can be used for destroying arms provided with chemical poisoning matters, namely poisoning gases. Installation has system for storing and feeding neutralizing solutions, system for supplying matter to be processed, ejector provided with mixing chamber, diffuser and branches for supplying main working stream and matter to be processed, flow-through reactor connected in series with diffuser, container for storing products of reaction and gas cleaning system. Installation is provided with system for supplying matters under pressure to reactor, namely, neutral gas, and system for checking seal-proof of connections. System for supplying neutral gas to flow-through reactor has at least one nozzle apparatus and lock-adjusting and control equipment which are connected together and with source of neutral gas under pressure. Systems for supplying and storing neutralizing solutions and feeding processed matter are connected with branches for supplying main working flow and processed matter of ejector. Flow-through reactor is made in form of pipeline with at least one axial turbine mixer, disposed inside reactor, for activating chemical reactions. Nozzle apparatus of system for supplying neutral gas into flow-through reactor is mounted in front of axial turbine mixer. System of checking connections for seal-tightness is made in form of at least one ring-shaped chamber embracing item to be inspected, aids for creating excess pressure of inert medium and test equipment. All the units of system are connected together and are filled with inert medium. Conditions of processes of chemical conversion of poisoning matters in ejector are improved and level of inspection of parameters of operation is increased.

EFFECT: improved ecological cleanness; improved safety of detoxication process.

4 cl, 3 dwg

FIELD: oil producing industry; testing facilities.

SUBSTANCE: invention relates to pumping facilities. Proposed ejector multifunctional formation tester has mechanical or hydromechanical packer installed on tubing string for fixed positioning in released state in well at preset depth, jet pump accommodating nozzle and mixing chamber with diffuser in its housing, and stepped through channel is made with possibility of fitting functional inserts, for instance, functional insert for recording pressure built up curve. Jet pump is located in casing string over well producing formations, self-contained logging complex is installed lower than packer on tubing string for measuring, for instance, specific electric resistance of rock or for action onto formation by physical fields, for instance, acoustic fields, and second additional packer is installed being made of elastic material in form of open-top cup with conical side wall. Cup bottom is hermetically secured on tubing string, and ring is arranged on rubbing string lower than additional packer for centering packer in casing string, distance between packers being not less than outer diameter of tubing string in place of mounting of additional packer. Thanks to it intensification of investigation and testing of wells with open or cased hole, primarily crooked or horizontal ones, optimization of arrangement of packers at their operation together with jet pump and self-contained logging complex are provided.

EFFECT: improved reliability of operation of well jet plant.

2 cl, 1 dwg

FIELD: oil and gas production industry, particularly methods or apparatus for obtaining oil, gas, water and other materials from multizone wells.

SUBSTANCE: device comprises packer with flow blocking means formed as hollow body with orifices located over and under sealing member of the packer. Pipe is arranged inside the body so that the pipe is concentric to body axis. Lower pipe end is connected to the body, upper part thereof cooperates with annular bush over outer pipe surface. Annular bush may move in axial direction and is provided with annular sealing means and with shear pins, which fixes the bush inside the body. After pin cutting annular bush moves downwards and closes body orifices located over sealing packer member to cut-off flow leaving orifices below sealing packer member.

EFFECT: extended water-free oil well operation period, increased oil recovery and reduced oil production costs due to elimination of water lifting charges and prevention of well bore zone contamination.

4 dwg

FIELD: oil and gas industry, particularly downhole equipment to be installed in oil and gas reservoirs.

SUBSTANCE: device comprises hollow body with discharge channels threadedly connected to flow string. The body is provided with shell having orifices and pressure nut. Spring, valve and replaceable head are arranged in annular gap between the body and the shell. The spring is installed between upper and lower support washers. The valve is located between upper support washer and shell ledge. The replaceable head is secured to the shell by means of pressure nut. Sleeve with orifices is coaxially installed inside the body between body extensions so that the sleeve may be displaced by wire-line equipment tool to misalign or align sleeve and shell orifices with discharge body channels.

EFFECT: provision of fluid flow from underlying reservoir to overlaying one.

2 cl

FIELD: oil field development, particularly obtaining oil from a deposit by flooding.

SUBSTANCE: method involves drilling injection and production wells; injecting liquid in wells and extracting product. Wells are drilled along with local valleys and projections investigating. Natural formation water directions are assigned as water flow direction from projections to valleys. Then formation permeability anisotropies created by above flow are determined. Peripheral and line injection wells are located in correspondence with natural formation water flow direction, namely at outer oil-bearing contour from natural formation water flow entering side. Intracontour well rows are additionally arranged substantially transversally to natural formation water flow direction. Production wells are drilled substantially transversally to natural formation water flow direction.

EFFECT: increased oil output due to improved high-permeable formation injectivity and decreased number of injection wells.

1 ex, 2 dwg

FIELD: oil field development, particularly to obtain oil from a multiple-zone well.

SUBSTANCE: method involves drilling vertical and horizontal wells, injecting displacing agent and recovering product. Production horizontal and vertical wells and/or branched horizontal wells are drilled in zones having lesser average number of permeable intervals and greater reservoir part values and in formation junction zones of field to be developed. Injection wells present in above zone are used for oil production. Some production wells arranged along above zone border are used as injection ones along with previous highly-viscous liquid plug injection into high-porous formations to direct main liquid flow, namely oil and displacing agent, to horizontal wells.

EFFECT: increased oil recovery due to enlarged effective well bore length and due to increased inflow of oil displaceable from zones characterized by increased average number of permeable intervals to zones with high reservoir part values.

1 ex, 2 dwg

FIELD: oil industry.

SUBSTANCE: device has raising pipes column, flow distributor, upper and lower packers, each of which has body and elastic collar. Flow distributor is made in form of sub with longitudinal radial channels. Device has central pipe, connected to lower portion of sub. Channels and pipe connect inter-tubular space above upper packer to well shaft below lower packer. Each packer is provided with drift-bolt and support sleeve, into the latter from which its body enters with possible longitudinal displacement and connected to it by shear elements. Also provided is branch pipe, connected by upper end to supporting sleeve of upper packer, and by lower end - to intermediate pipe or pipes with detachable connection, connecting upper packer to lower one. Branch pipe is made with inner disconnecting ring and above it - with radial channels, connecting inner space of raising pipes through longitudinal channels of sub to well shaft between upper and lower packers. Lower end of central pipe enters disconnecting ring of branch pipe. Also provided is supporting pipe or pipes with filter, connected to supporting sleeve of lower packer.

EFFECT: simplified construction, higher reliability, higher durability.

2 dwg

FIELD: oil industry.

SUBSTANCE: device has body with solid wall in central channel and three rows of radial channels. Moving branch pipe is put on the body with a pin. It interacts with figured groove, placed on the body. Stepped cylinder is connected to the body, which by lower end enters a packer, and by upper end is stopped against a spring. It is mounted between end of cylinder and ring-shaped shelf of moving branch pipe. Dependently on position of moving branch pipe connection of behind-pipe space where pump is positioned, occurs to zone of upper or lower productive bed.

EFFECT: simplified construction, higher efficiency, higher reliability.

2 dwg

FIELD: mining industry.

SUBSTANCE: at least one pipes column is lowered into well with constant or variable diameter with or without plugged end, with at least one packer lowered below upper bed of hydraulic and/or mechanical effect with or without column separator. Below and above packer mounting assemblies are lowered in form of well chamber, or nipples with removable valve for feeding working agent through them respectively into lower and upper beds, mounting packer and pressing it from downwards and/or upwards. Minimal absorption pressure for each bed is determined during pressing. Working agent is pumped from mouth into pipes column hollow at given pressure, directing it into upper and/or lower beds through appropriate detachable valves in mounting assemblies. Total flow of working agent is measured on the surface as well as mouth pressure and/or temperature in pipes column hollow and behind-pipe well space. Face pressure of upper bed is determined as well as pressure in pipes column and behind-column space at depth of detachable valve in mounting assembly above the packer. Flow of working agent pumped into upper bed through detachable well is determined, subtracted from total flow and flow of working agent fed into lower bed is determined. Actual flows of working agent for beds are compared to planned values. In case of differences mouth pressure is changed ad/or detachable valves for one or more beds are extracted from mounting assemblies by rope gears. Their characteristics and/or parameters are determined and altered. After that each detachable valve is mounted again into appropriate mounting assembly by rope gears and pumping of working agent through them into appropriate beds is resumed.

EFFECT: higher efficiency.

25 cl, 11 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: device has operation columns of upper and lower well zones, placed eccentrically one inside the other in upper zone of well, double airlift column, mounted in upper well zone, and double airlift column, connected to operation well of lower well zone, separation column, mounted coaxially to operation column of upper well zone, and cementation pipe. According to invention, in a well with significant power of non-productive zone it is equipped with additional separating column with cleaning channels for lowering drilling tool therein and drilling well to lower well zone with removal of drilling slurry by double airlift column of upper zone through cleaning channels. Additional separating column is combined coaxially with operation column of lower well zone and is rigidly fixed to separation column.

EFFECT: higher efficiency.

1 dwg, 3 cl

The invention relates to the field of the oil industry and can be used for watering operation of oil wells with multi-layer heterogeneous structure of the productive interval

The invention relates to the oil and gas industry

FIELD: oil and gas extractive industry.

SUBSTANCE: device has operation columns of upper and lower well zones, placed eccentrically one inside the other in upper zone of well, double airlift column, mounted in upper well zone, and double airlift column, connected to operation well of lower well zone, separation column, mounted coaxially to operation column of upper well zone, and cementation pipe. According to invention, in a well with significant power of non-productive zone it is equipped with additional separating column with cleaning channels for lowering drilling tool therein and drilling well to lower well zone with removal of drilling slurry by double airlift column of upper zone through cleaning channels. Additional separating column is combined coaxially with operation column of lower well zone and is rigidly fixed to separation column.

EFFECT: higher efficiency.

1 dwg, 3 cl

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