Oil-well operation unit

FIELD: oil and gas industry.

SUBSTANCE: invention relates to submersible pumping units for operation of wells, where it is necessary to increase the differential pressure drawdown, without deepening of submersible pumping unit, and/or with unsealed production casing. The unit for oil-well operation includes the tubing string, electric submersible cable, electric submersible pump, the hydroprotection and submersible electric motor of which are encapsulated in the pressure-tight housing, which is tightly closed on the housing of the input unit of the electric submersible pump, the liner consisting from the pipe string the top part of which through the bushing is tightly connected to the bottom part of the pressure-tight housing, and in the bottom part of the liner the branch pipe with external sealing elements is located. The unit contains at least one packer with internal through passage channel with the diameter allowing to pass through the packer the tool, equipment and instruments, without extracting the packer. The sealing unit for the tight connection with the branch pipe of the liner is located either in the packer housing, or in the device below or above the packer.

EFFECT: improvement of performance of recovery of formation fluid from the wells.

1 dwg

 

The invention relates to the field of hydrocarbon production, namely to the submersible pump installations for the operation of wells, in which it is necessary to increase the depression of strata is not recessed submersible pump installation and or leaking the production column.

Known submersible pump (analog) [1], patent RU No. 2136970 C1, F04D 13/10, 10.09.1999, containing the drive motor, is placed in a cooling tank and cooled by the pumped fluid, the pump Assembly with the selection grid. The pump is provided with a cylindrical container with holes formed on the top and upper part of the side surface and informing annulus with the pump intake. The pump is placed inside a cylindrical tank. Cooling capacity is made open at the bottom and with holes on the top and upper part of the side surface. Cooling capacity pump is located under the node. The disadvantage of this design are insufficient to protect the pump from contact with solids, a large metal content.

Known pumping plant for the operation of reservoirs in the well (analog) [2], patent RU 2339795, E21B 43/14 published: Bulletin 33 dated 27.11.2008, containing electrophoreses pump when the engine is equipped with a sensor, the system of the packers, sharing the well to the zone of the formations, the shank is about fittings, regulating the performance of the reservoir, and flow meters in the form of a throttle with pressure sensors, with submersible motor provided with a casing provided with a shank and connected to an input node of a pump, and a shank provided with channels, each of which reports the area of the respective layers with a cavity of the casing, as a measuring throttle used fittings that are installed at the entrance of each channel in the casing, and as the pressure sensor, installed at the outlet of the throttle, used a single one, installed in the motor, and the other pressure sensors positioned relative to the fitting side of the reservoir. The disadvantages of the system are the complexity of the design and its installation due to the presence of a large number of regulatory and Supervisory nodes. However, it cannot be used in wells with one layer, at depths exceeding permissible for electroforming pump, narrowed at the bottom of the wells due to the overall diameter of the pump casing and in wells with violations above the upper reservoir.

Known electrical submersible pump installation (analog) [3], patent RU No. 2382237 application 04.06.2008, the beginning of validity of the patent 04.06.2008, publication of the patent 20.02.2010 containing an electric motor cooled by the pumped liquid, the centrifugal the ASAS with the selection grid, characterized in that the installation is completely housed inside the casing with the annular gap, to which the bottom consistently valve attached node, frame, wire filter and the drive, the top cover is attached to the tubing pipe, frame, wire filter presents a bearing rod, tube frame and a membrane filter, and the tubular frame has a longitudinal slit on its outer surface cut triangular thread, and the membrane filter is made of wire of triangular cross-section, between the coils of which there are cracks extending into the design.

The disadvantage of this invention is the poor construction of the drive valve block, the inability when lifting submersible pump and shank, without removing the packer, to produce through his descent tools, equipment and devices to work in podvecerni the zone, flushing of the face, geophysical studies of the casing and perforation intervals, to perforation of the layers, the bottomhole zone treatment of the productive formation and other types of works. Known installation for operation of reservoirs (prototype) [4]. RF patent №90121, E21B 43/14. Date of publication of application: 2008.12.29. (45) Published 2009.12.27, including electrophoreses pump with a casing provided with a shank and connected to the input of ultrasonic is f pump, the engine is equipped with a sensor, at least one packer separating the bore into zones of reservoirs, and the shank has at least one channel that is communicated to the appropriate location in the well where necessary fitting governing the performance of the respective layer, wherein the upper packer is set above the upper reservoir and is equipped with top technological pipe fitted above the centering extension with internal sealing site, and the casing bottom is equipped with a hollow plunger made with the possibility for interaction sealed fixation in sealing the node.

The disadvantage of this invention is that the centering extension is made with an inner seal and to control and audit of sealing elements required lifting packer layout, because when re-docking equipment is not guaranteed the integrity of the site, the potential effect of Stolbovaya due to the small gap between the head part of a submersible electric pump and the inner surface of the hermetic casing.

The technical problem solved by this installation is to increase the efficiency of production of formation fluids from wells that have restrictions for lowering a submersible pump unit, for example the EP sidetrack small diameter, or production casing with numerous violations, including violations, below the depth of the submersible pump, and reducing the cost of repair of wells, fewer accidents.

This problem is solved by the installation for the operation of reservoirs in the well comprising a tubing pipes, electrophoreses cable, with or without additional hydraulic or electric line for power or control of any hydraulic or electrical systems located below electroforming pump, or the supply of chemicals to the intake pumping plants, electrophoreses pump, at which the protector and submersible motor installed or not installed below the submersible motor control devices operating parameters of the motor, dispenser of chemical reagents, flow meter, hygrometer, pressure sensors and temperature, placed in a sealed casing, which hermetically closes on the input module submersible pump, liner, consisting of a pipe string, the upper part of which through the sub hermetically connected to the bottom part of the hermetic casing, and in the lower part of the shank is a pipe with outer sealing elements, which allows monitoring the status of the upl is titeling elements and their replacement with re and subsequent descents equipment without removing the packer. The installation includes at least one packer intended for hermetic separation of the sections of the production casing, and having an inner entrance channel diameter, allowing it to pass through the packer downhole tool, equipment and devices, without removing the packer sealing site for a tight connection with the pipe stem in the body of the packer, or the device is above or below the packer, may or may not have a shank, which is tightly connected with the lower part of the packer, or the lower part of the sealing device, which is tightly connected to the lower part of the packer and the lower part of the shank can be fitted, and may not be equipped with a filter, or, for example, dosing of chemicals that may or may not have sealed emergency releasable by a specified force nodes that are installed on the tubing above the pump equipment and on the shank between the sealed casing and the upper packer, and if through this site are held electrical or hydraulic lines, it is equipped with an additional node break these lines, preventing the formation of dangerous gland from electric and / or hydraulic lines around the tubing or liner in a disaster recovery. At the head of submersible ele is tradigital can be and may not be profesionaly channels for flow of the produced fluid between the inner surface of the sealed casing and a submersible electric motor, the protector in the head part may or may not have progresirovanie longitudinal channel for laying mains power cable and other cables or hydraulic tubes, sealed channel for the passage of the supply line of a submersible electric motor, and may or may not have a single channel with an airtight seal, which is used either for hydraulic lines, for example for the supply of various reagents on the pump intake, or electric line control devices and equipment, under a submersible electric motor, or below the pressure-tight casing equipment and devices. In this case, the line hydraulic or electric control passes through the cavity of the sealed casing and goes down into the cavity of the shank connected at the bottom part of the hermetic casing, or through a tight seal, made with chevrons or sealing rings located in the lower part of the pressure-tight casing or liner goes into the annulus.

In Fig.1 shows an installation in one of the versions.

Installation for the operation of wells which works as follows. In the well during the first trip operation below the leaking section of the production casing, or above the top perforation interval set the packer 1, or two-packer layout. In addition, the lower part of the packer 1, or two-packer Assembly can be attached to the shank 2 with a filter 17.

Then the second step down in sequence from the bottom up nozzle 3 with the sealing elements on the outer surface of the shank of the tubing 4, which are attached to the sealed housing through the sub 18, tight emergency-releasable node 5, a sealed casing 6 defined therein with protector 10 and submersible electric motor 7, to the lower part which can be attached unit telemetry system 8, or, for example, an Autonomous dispenser chemicals 9, the input module 11 with a sealed channel line power submersible electric submersible pump 13, whipped valve 14, tight emergency-releasable node 15, a column of tubing 16, the cable 12V power submersible electric pump 7, which may or may not have additional electrical and/or hydraulic line. The assembled arrangement descends into the well to the depth of the upper packer 1, then unloading produce sealed Stykow the nozzle 3 of the shank 4 in the inner cavity of the packer 1, either the device under packer or above the packer. Thus, all the leaking areas of the column cut off the retainer 1, and the liquid after running well in the work of the perforation intervals comes from the packer 1 through the shank 2 into the internal cavity of the pressure-tight casing 6 on reception of the input module 11 and pump unit 13.

What's new is that in the lower part of the shank is a pipe with outer sealing elements, which allows monitoring the status of the sealing elements and replacing them with second and subsequent descents equipment without removing the packer. The nozzle shank is joined and hermetically sealed in the housing of the upper packer, is installed under a submersible pump and lower operational violations of the column or in the device above or below the packer and the packer has a passage diameter, allowing for the rise of a submersible pump and shank, without removing the packer, to produce through his descent tools, equipment and devices to work in podvecerni the zone, flushing of the face, geophysical studies of the casing and perforation intervals, to perforation of the layers, the bottomhole zone treatment of the productive formation and other types of works. In addition, progresirovanie channels at the head of the submersible electropl the ode pump help, without weakening the structure, the free flow of reservoir fluid to the intake submersible pump without the effect of Stolbovaya in the gap between the housing of the actuator and the inner surface of the hermetic casing. Progresirovanie shallow longitudinal channel in the head part of hydronamic allows you to securely attach the supply line of submersible electric and other lines running along hydronamic, and avoid sudrania when screwing the pressure-tight casing for housing the input module and attached to the protector and submersible electric motor. New also is the presence of additional sealed channel for installation in hydraulic or electric lines. Tight emergency-releasable tension on the specified force the units are installed under sealed cover and over him, and if through this site are held electrical or hydraulic lines, they are equipped with additional nodes divide these lines, preventing the formation of dangerous seal around the tubing and liner when removing from the well.

Technological and technical results when using achieved by reducing the time of repair of wells and equipment, allowing for the rise of a submersible pump and shank, without removing the packer, is proizvoditel through the descent of the tool, equipment and devices to work in podvecerni the zone, flushing of the face, geophysical studies of the casing and perforation intervals, to perforation of the layers, the bottomhole zone treatment of the productive formation and other types of work, more efficient cooling of all the warm parts of a submersible electric motor upward flow of fluid, the presence of tight emergency-releasable tension on the set force of the nodes include additional nodes gap hydraulic or electric lines that prevents the formation of dangerous seal around the tubing and liner when removing from the well by saving the attachment lines to the equipment.

The economic effect from the use of the invention can be achieved by increasing the MTBF, extend the service life of the pump installation and reduce the time to conduct additional types of work due to the possibility of passing on the working face of the tool instruments and equipment through the packer, and the possibility of re-docking after removing and equipment repair and revision of sealing elements.

Bibliography

1. Patent RU No. 2136970 C1, F04D 13/10, 10.09.1999,

2. Patent RU 2339795, E21B 43/14 published: Bulletin 33 dated 27.11.2008,

3. Patent RU No. 2382237, who odaca application 04.06.2008, the patent 04.06.2008, publication of the patent 20.02.2010.

4. RF patent №90121, E21B 43/14. Date of publication of application: 2008.12.29. Published 2009.12.27.

Installation for the operation of oil wells, characterized in that it includes a string of tubing, electrophoreses cable, may have or may not have the optional hydraulic or electric line for power or control of any hydraulic or electrical systems located below electroforming pump, or the supply of chemicals to the intake pumping plants, electrophoreses pump, at which the protector and submersible motor installed or not installed below the submersible motor control devices operating parameters of the motor, dispenser of chemical reagents, flow meter, hygrometer, placed in a sealed casing, which hermetically closes on the case input module submersible pump, liner, consisting of a pipe string, the upper part of which through the sub hermetically connected to the bottom part of the hermetic casing, and in the lower part of the shank is a pipe with outer sealing elements, which allows monitoring the status of the sealing elements and replacing them with second and subsequent descents equipment and without the desire of the packer, containing at least one packer intended for hermetic separation of the sections of the production casing and having an inner entrance channel diameter, allowing it to pass through the packer downhole tool, equipment and devices, without removing the packer sealing site for a tight connection with the pipe stem in the body of the packer, or the device is above or below the packer, may or may not have a shank, which is tightly connected with the lower part of the packer, or the lower part of the sealing device, which is tightly connected to the lower part of the packer and the lower part of the shank can be fitted, and may not be equipped with a filter, or, for example, dosing of chemicals, and may or may not have sealed emergency-releasable to the preset force nodes that are installed on the tubing above the pump equipment and on the shank between the sealed casing and the upper packer, and if through this site are held electrical or hydraulic lines, it can be equipped with an additional site of rupture of these lines, preventing the formation of dangerous gland from electric and/or hydraulic lines around the tubing or liner in an emergency extraction, and in the head part of preparing the aqueous motor can be and may not be profesionaly channels for flow of the produced fluid between the inner surface of the sealed casing and a submersible electric motor, the protector in the head part may or may not have progresirovanie longitudinal channel for laying mains power cable and other cables or hydraulic tubes, sealed channel for the passage of the supply line of a submersible electric motor, may have or may not have a single channel with an airtight seal, which is used either for hydraulic lines, for example for the supply of various reagents on the pump intake, or electric line control devices and equipment, under a submersible electric motor, or below the pressure-tight casing equipment and devices, in this case, the line hydraulic or electric control passes through the cavity of the sealed casing and goes down into the cavity of the shank connected at the bottom part of the hermetic casing, or through a tight seal at the bottom part of the hermetic casing or liner, goes into the annulus.



 

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