Installation for simultaneously separate operation of two reservoirs
The invention relates to pumping units for separate operation of several reservoirs. Provides simplification of the device and improving the reliability of his work. The inventive device includes a column lift pipes, pump rod, the retainer and the shank. Pump rod is provided with an additional suction valve. It is placed on the side wall of the cylinder and divides the cylinder along the length into two parts, proportional to the capacity of the reservoirs. The facility provides the opportunity to enter the pump cylinder during the movement of the plunger up first production of low-pressure reservoir, and after passing the additional plunger valve products high-pressure reservoir. 2 Il. The invention relates to the oil industry, in particular to a downhole pump installations.Known pump installation for separate operation of two reservoirs containing two pump and packer, the upper pump pumps the fluid from both layers (see R. A. Maksutov, B. E. Dobroskok, Y. C. hares. Simultaneous separate operation of multireservoir oil fields. - M.: Nedra, 1974, page 84).The disadvantage is the complexity Candlemas installation for separate operation of two reservoirs, containing packer and one pump (see page 104), which in front of the suction valve installed fittings, connected through the appropriate channels with different layers.Disadvantages installation are the design complexity, and unreliability of regulation capacity in reservoirs.The aim of the invention is to simplify the design and increase the reliability of its work.This goal is achieved by the fact that in the known installation for separate simultaneous operation of two reservoirs, including the column lift pipes, pump rod, packer and liner, the pump is provided with an additional suction valve located on the side wall of the cylinder, and the point of placement of the additional valve divides the cylinder into two parts, proportional to the capacity of the reservoir.The invention consists in that the proposed installation layers separated by a packer, and the additional suction valve located on the side of the cylinder provided with high-pressure reservoir. Therefore, when the upward movement of the plunger in the cylinder, first comes the production of low-pressure reservoir, and then, when the plunger pass valve through the low-pressure, the main suction valve, is in communication with the low pressure reservoir will be closed by differential pressure. Therefore, during the remaining stroke of the plunger in the cylinder is supplied products only high-pressure reservoir.Usually separately exploit it different pressure layers, because in the case of joint operation of the high pressure reservoir "crush" low-pressure reservoir and in fact is the operation of a single reservoir with its flow rate.In Fig.1 shows a pump unit for separate operation of the two layers of Fig.2 - installation design for the case when high-pressure is the lower layer.The installation includes a column lift pipes 1, is attached to the cylinder 2 pump with the main 3 and 4 suction valves. Inside the cylinder 2 is a piston 5 with the discharge valve 6. To the lower end of the cylinder 2 is attached to the shank 7 with packer 8, installed in the production string 9 in the interval between 10 high-pressure and low-pressure 11 productive formations.In Fig.2 additional valve 4 reported by channel 12 with the cavity of the shank 7, and the suction valve 3 - channel 13 with the annular space above the packer 8.Setup works as follows.When d is operating channels in the production string 9 under the action of hydrostatic pressure P1enters the cylinder chamber 2 of the pump, with additional side suction valve 4 is blocked by the plunger 5 is above or plunger and is still closed by the differential pressure. After passing through the plunger valve 4 last offer, because downhole pressure P2>R1and valve 3 under the action of the same pressure differential is closed. Upon further movement of the plunger 5 up in the cylinder chamber 2 enters the liquid only from the high-pressure reservoir 10. Upon reaching the top point of the plunger 5 changes its direction of motion, the fluid flows through the discharge valve 6 from podprumerny cavity of the cylinder in mudplugger. After the plunger 5 to the low point of the cycle is repeated.However due to the fact that the additional intake valve 4 is placed at the point which divides the cylinder 2 in length in proportion to the set flow rates of the layers, and the diameter of the pump is selected so to ensure that these flow rates, the pump produces the sum of the given flow rates. The flow rates define the optimal results of the split test operation of each of the layers.If more high-pressure is the lower layer, the design of the installation is slightly different (Fig.2). And the setup works exactly the same, ka is asenapine layer, each in its optimal mode without using any stutzeri device and to provide at the outlet of the pump total optimal flow rate of the two layers. Each layer operates in its mode, without affecting the other.Perform the installation without fittings simplifies its design and provides a clear and reliable operation.
ClaimsInstallation for simultaneously separate operation of two reservoirs, including the column lift pipes, pump rod, the retainer and the shank, wherein the pump rod is provided with an additional suction valve located on the side wall of its cylinder and dividing the cylinder along the length into two parts, proportional to the capacity of the reservoir, while the plant provides the opportunity to enter the cylinder rod of the pump, when the movement of the plunger up, first production of low-pressure reservoir, and after passing the additional plunger valve products high-pressure reservoir.
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.
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.
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.
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.
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.
FIELD: oil production, particularly to produce watered oil and produced water utilization.
SUBSTANCE: pumping plant comprises pumps, which may be serially installed in well and provided with inlet and outlet means, drives and packer. Packer may be located inside well between beds. One bed is filled with oil-water mixture, another bed, namely lower one, is adapted for water receiving. Plant comprises screw pumps with drives installed on surface and polished shaft with gasket to connect worm shaft of upper pump with that of lower one. Lower screw pump has inlet means with radial orifices to receive water phase separated from oil-water mixture, as well as with slots. Lower pump comprises case, which defines channel for water injection into lower bed via above channel and through slots made in inlet means of lower pump during the same auger shaft rotation.
EFFECT: increased efficiency due to surface-driven screw pump usage.