Fluid injection device

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

 

The invention relates to the oil and gas industries, in particular to the downhole equipment of oil and gas fields, and can be used to bypass fluid from the lower reservoir in the upstream.

A device for injection of fluid into the reservoir, including mounted on tubing with a thread of the hollow body with outlet channels (p-t RF # 2198288, IPC 7 E 21 In 43/20, publ. 10.02.03,).

A disadvantage of the known device is that it cannot be used to bypass fluid from the lower reservoir in the upstream.

The objective of the proposed technical solution is the provision of bypass fluid from the lower reservoir in the upstream.

The problem is solved due to the fact that the device for injection of fluid into the reservoir, including mounted on tubing with a thread of the hollow body with the outlet channels, the enclosure is equipped with a cover with holes and a packing nut, the annular gap between the casing and the casing is placed is installed between the lower and upper bearing spring washers mounted between the upper support plate and the tab on the valve casing, and a removable cap attached to the housing with the push nut within the housing between the tabs and coaxially he posted sleeve with holes and with the possibility her shift instrument cable technology for combination or separation of the holes of the sleeve and casing with the outlet channels of the body.

The drawing shows a device for injection of fluid. Device for injection of fluid comprises a hollow body 1 with outlet channels 2 and mounting threads 3 and 4. The body 1 is provided with a casing 5 with holes 6 and a packing nut 7. In the casing 5 may be from 4 to 6 holes. In the annular gap between the housing 1 and the casing 5 posted: spring 8 mounted between the lower support plate 9 and the upper bearing washer 10, the valve 11 with the seal 12 is mounted between the upper support washer 10 and the protrusion 13 on the casing 5, a removable nozzle 14 mounted on the casing 5 a packing nut 7 with the seal 16. Replaceable nozzle 14 is designed to adjust the flow rate of the injected fluid due to the possibility of changing the area of the annular gap 15. Spring 8 and the annular valve 11 preclude reverse flow of fluid after downtime, prevent accidental ejection of fluid in the event of failure of x-Mas tree, provide the opportunity for exploration and plugging of wells direct circulation. Inside the housing 1 coaxially him between the projections 17 and 18 on the housing 1 is placed a sliding sleeve 19 with holes 20 and seals 21. In the sliding sleeve 19 can be from 4 to 6 holes, it is controlled instrument cable technology and is designed for sealing annular spaces.

Device for discharge of the working fluid is AET as follows.

To bypass fluid from the lower layer in overlying before descending into the well, the device is attached to the upper pipe lower section and the lower tube upper section of tubing with mounting threads 3 and 4. Tubing down to the underlying layer with high reservoir pressure. In the well between the two layers set the packer, which should be between the operating string and the tubing. The device for injection of fluid is placed above the overlying layer. The device is closed when the sleeve 19 is in its upper position and rests on the ledge 17 of the housing 1. The orifices 20 of the sleeve 19 are shifted upward relative to the exhaust channel 2 of the housing 1, and the holes 6 of the casing 5 is blocked by the valve 11. When should I start the bypass fluid from the lower layer in overlying, instrument cable technology shift the sliding sleeve 19 down to the ledge 18 on the housing 1. Thus the combined openings 20 of the sleeve 19 with the outlet channels 2 of the housing 1. After increasing the pressure in the internal cavity of the tubing (0.2-0.4 MPa) valve 11 against the force of spring 8, is placed between the supporting washers 9 and 10, opens the opening 6 of the casing 5 and the pressurized fluid through the openings 20 and outlet ports 2 and also through the annular gap 15 in a removable nozzle 14 and the opening 6 of the casing 5 enters the ring about transto between the tubing and the production column and then in the overlying layer. A removable cap 14 provides adjustable preset flow of fluid, so it changes the cross-sectional area of the annular gap 15 between the casing 1 and the casing 5. After cessation of fluid and alignment (decrease) the pressure inside the tubing by the force of the spring 8 ring valve 11 closes the opening 6 of the casing 5, the insulating annular space between the tubing and the production column and the overlying layer.

The proposed device for injection of fluid into the reservoir allows you to provide a bypass of fluid from the lower layer in overlying at high adjustable bandwidth, to prevent reverse flow of fluid after stopping hole, to enable the development of (killing) wells direct circulation and sealing of annular spaces, to prevent accidental ejection of fluid in the event of failure of x-Mas tree.

Device for injection of fluid into the reservoir, including mounted on tubing with a thread of the hollow body with outlet channels, wherein the enclosure is equipped with a cover with holes and a packing nut, the annular gap between the casing and the casing is placed is installed between the lower and upper bearing spring washers mounted between the upper support plate and the tab on the valve casing, and a removable NASA is ka, fixed to the casing with the push nut within the housing between the tabs and coaxially he posted sleeve with holes, with the possibility of shifting tool cable techniques for combining or uncoupling of the holes of the sleeve and casing with the outlet channels of the body.



 

Same patents:

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

The invention relates to pumping units for separate operation of several reservoirs

The invention relates to borehole development and operation of multilayer deposits of hydrocarbons

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

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

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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 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

FIELD: oil production, particularly to produce watered oil and produced water utilization.

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EFFECT: increased efficiency due to surface-driven screw pump usage.

3 dwg

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