RU2542999C2 - Dowhnole pump unit for simultaneous and separate operation of two formations - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: installation comprises the production string, a packer with cable entry, a hydraulic manifold, a reciprocating pump and electrically operated centrifugal pump with locking and circulating valve connected to the packer by a connecting pipe and a power cable. In the manifold there is the central opening and longitudinal channels in parallel to the central opening as well as radial channels communicated to annular space. In the central opening of the manifold, above radial channels, a reciprocating pump is fixed so that it forms a cavity communicated with longitudinal channels and cavity of the production string. Below radial channels in the manifold central opening there is a bypass group that covers radial channels in the barrel simultaneously below circular cups of the packer isolating the well formations or ejector releasing gas cap from blinded below-packer annular space covering the central opening and fixed in the manifold by expandable collets with their potential removing by means of a rope and installation tool with capture of grabbing head. In the bypass group and ejector below the blind there are radial openings communicating cavity of intermediate pipe with prolonged channels of the manifold.

EFFECT: increased processibility of well operation.

3 cl, 3 dwg

Description

The invention relates to the oil industry, in particular to downhole pumping units, and can be used for simultaneous and separate operation of wells with two layers.

Known pump packer installation for simultaneous and separate operation of well strata, containing a pump lowered into a well on a pipe string, two packers of mechanical or hydraulic action with or without cable entry, one of which is installed above the upper formation, and the other between the layers. The pump is made with a casing and is placed between the packers or above the packer located above the upper layer. The casing is connected to a packer or to packers. Between the casing and the packer there is a bypass assembly or gas separator or jet ejector for bleeding gas. Pump packer installation provides increased reliability and functionality and operational efficiency of a well with multiple reservoirs (Patent RU No. 2296213 C2. Pump packer installation for exploitation of well strata. - IPC: Е21В 43/14. - Published on 03/27/2007).

Known downhole packer installation, including a string of tubing, a packer and a pump. In the cavity of the packer, a gas exhaust device is installed, which consists of two parts with the formation of a narrowing zone for gas exhaust. The lower part is installed in the packer barrel with the formation of a longitudinal bypass channel, the lower end of which is made with a shoulder located below the radial bypass channel of the packer, and is separated from its upper part by the upper radial bypass channel connecting the longitudinal bypass channel to the upper part of the packer cavity (Patent RU No. 2459930 C1. Downhole packer installation and gas removal device for it. - IPC: Е21В 43/00, Е21В 33/10. - Publ. 08.28.2012).

Known packer installation, including a string of tubing, a packer with a cable entry and a pump. The upper and lower radial bypass channels are made in the packer barrel. A pump flushing device is installed in the packer cavity, which contains a cylindrical insert consisting of two hollow parts with the formation of hermetically separated longitudinal forward and reverse channels for flushing the pump (Patent RU No. 2454531 C1. Packer unit (options) and pump flushing device for it (options ). - IPC: Е21В 43/00, Е21В 21/10. - Published on June 27, 2012).

Known pumping unit for simultaneous and separate operation of two layers in one well, containing a column of lift pipes, a packer, a submersible sucker rod pump with a hydraulic nozzle for pumping product from the upper layer, connected by a plunger to a drive rod located in the column of lift pipes, the latter are associated with a cylinder rod pump and are enclosed in a sleeve with a side channel communicating with the inlet channel of the hydraulic nozzle above the packer, and an electric drive submersible pump with an input module for pumping out Recreatives Products from the lower layer, the electric motor which is hermetically connected to the power cable. At the outlet of the electric drive pump, a check valve is installed, which communicates with the annular space through a channel formed between the rod pump cylinder and the sleeve, at the end of which a liner is made (Patent RU No. 2339798 C2. Pump installation for simultaneous and separate operation of two layers in a well. - IPC: ЕВВ 43/14. - Published on November 27, 2008).

The closest analogue of the claimed invention is a borehole pumping unit for simultaneous and separate operation of two layers, containing a lift pipe string, a packer, a sleeve with a shank, a submersible pump with a hydraulic nozzle connected to a drive rod located in the lift pipe string, the latter are enclosed in a sleeve with a radial hole communicating with the channel of the hydraulic nozzle above the packer, and an electric drive pump with an input module and a submersible motor. At the outlet of the electric drive pump, a non-return valve is installed, which communicates with the column of elevator pipes through the intermediate pipe, a jet ejector installed in the socket of the docking clutch and located in the shank of the sleeve, and a cavity formed between the cylinder of the rod pump and the sleeve. In the coupling, radial channels are made at the level of the gap between the ends of the shank and the intermediate pipe below the packer. The hydraulic nozzle is installed in the sleeve using cuffs with a stop in the collar with an inner diameter larger than the outer diameter of the jet ejector, and is fixed with an expanding collet with the possibility of removing the rod pump and the jet ejector from the installation. A bypass channel is made in the sleeve, communicating the volume below the sucker rod pump with the annulus above the packer through the cavity between the sucker rod pump cylinder and the sleeve (Patent RU No. 2488689 C1. Downhole pumping unit for simultaneous and separate operation of two layers. - IPC: Е21В 43/14. - Publish. 07.27.2013). This pump unit is adopted as a prototype.

A disadvantage of the known pumping units is the insufficient efficiency of well operation due to the complexity of its technological maintenance, which requires changing the operating mode of the well to dismantle the pumping unit and remove it from the well.

The main task, the invention is aimed at, is to ensure stable operation of the well with the ability to change the operating mode of the well without dismantling the pumping unit and removing it from the well, to quickly change the operating mode.

The technical result is to increase the manufacturability of the well.

The specified technical result is achieved by the fact that in the well-known downhole pumping unit for simultaneous and separate operation of two layers containing a column of elevator pipes, a packer with cable entry, a reciprocating pump with a drive rod for pumping product from the upper layer, and an electric drive centrifugal pump with an inlet a module and a check valve for pumping the product from the lower wellbore, connected by an intermediate pipe to the packer barrel, the electric motor of which is hermetically connected to the cable ektropitaniya from the ground control station, and an ejector for venting gas cap from the annulus below the packer to be fixed in the installation and removal of the expansible collet its rope using the assembly tool with the seizure engagement head formed on the ejector, according to the proposed technical solution,

the installation includes a hydraulic manifold connected on one side to the column of elevator pipes and on the other to the packer barrel, a central hole is made in the collector with an internal groove, longitudinal channels are made parallel to it in the wall, between which radial channels are made symmetrically to the groove, communicating the central hole of the collector with nadpakerny annular space, while in the collector by means of an expanding collet, a reciprocating pump, hermetically installed by the inlet the central hole above the radial channels with the formation in the collector above the seat of the cavity, communicating with the longitudinal channels of the collector, on the one hand, and, on the other, with the cavity of the column of elevator pipes, and below the radial channels of the collector, an ejector or bypass assembly is installed in the central hole, replacing each other under the condition of the presence or absence of a gas cap in the under-packer annular space, made with a plug that hermetically covers the central hole, while the bypass assembly is one it also temporarily closes the radial channels made in the packer’s trunk below the annular cuffs, separating the borehole layers, and below the plugs in the bypass assembly and ejector, there are made radial holes communicating the cavity of the intermediate pipe with the longitudinal channels of the collector; with the help of a rope and a mounting tool, for which the bypass assembly is equipped with a hook head;

it is additionally equipped with a device for washing a centrifugal pump containing a plug that is hermetically installed in the central hole of the collector with the formation of a cavity communicating with the longitudinal channels of the collector, on the one hand, and on the other hand, with the cavity of the column of elevator pipes, and a bushing mated to the plug and hermetically installed in the packer barrel, on the outside of which a groove is made forming a cavity communicating the sub-packer annular space through the radial channels of the packer barrel with radial collector channels, for which a blind hole is made from the bottom end of the plug communicating with the cavity of the bushing, and radial channels and an outer groove are made in the formed wall of the plug, communicating on one side with the cavity of the bushing through the blind hole in the plug, and on the other with nadpakerny annular space through the radial channels of the collector, while the tube is equipped with a hook head with the ability to remove the device from the pump installation with an installation tool using a rope;

as a check valve can be installed shut-off and flush valve circulation type.

The analysis of the prior art cited by the applicant made it possible to establish that there are no analogues that are characterized by sets of features identical to all the features of the claimed borehole pumping unit for simultaneous and separate operation of two formations. Therefore, the claimed technical solution meets the condition of patentability "novelty."

The search results for known solutions in the art in order to identify features that match the distinctive features of the prototype of the features of the claimed technical solution have shown that they do not follow explicitly from the prior art. From the prior art determined by the applicant, the influence of the transformations provided for by the essential features of the claimed technical solution on the achievement of the specified technical result is not revealed. Therefore, the claimed technical solution meets the condition of patentability "inventive step".

The claimed technical solution can be implemented at any engineering company from well-known materials and effectively used in the oil and gas industry. Therefore, the claimed technical solution meets the condition of patentability "industrial applicability".

Figure 1 presents the layout of the downhole pumping unit for simultaneous and separate operation of two layers with a bypass node; figure 2 is the same, with an ejector for bleeding the gas cap; figure 3 is the same, with a device for flushing a centrifugal pump.

A downhole pump installation for simultaneous and separate operation of two layers contains a column of lift pipes 1, a packer 2 with a cable entry, a reciprocating pump 3 with a drive rod 4 for pumping the product from the upper layer I, and an electric drive centrifugal pump 5 with an input module 6 for pumping product from the lower layer II of the well, connected to the packer 2 by an intermediate pipe 7. The electric motor 8 of the centrifugal pump 5 is hermetically connected to the power cable 9 from a ground control station (not shown conventionally). At the outlet of the centrifugal pump 5, a circulation-type shut-off and flushing valve 10 is installed, connected by an intermediate pipe 7 to the packer barrel 2. Between the column of elevator pipes 1 and the packer barrel 2, a hydraulic manifold 11 is installed, in which a central hole 12 with an internal groove is made. In the wall of the manifold 11 parallel to the central hole 12, longitudinal channels 13 are made, between which the radial channels 14 are made symmetrically to the inner groove, communicating the central hole 12 of the collector 11 with an overpack annular space 15. In the collector 11, a reciprocating pump 3 is fixed, the last hermetically installed by the inlet in the Central hole 12 above the radial channels 14 by means of cuffs with the formation in the manifold 11 above the seat of the cavity 17, communicating with pr one channel 13 of the collector 11 on the one hand and on the other hand with the cavity of the column of elevator pipes 1. In the trunk of the packer 2 below the annular cuffs separating the layers I and II of the well, radial channels 18 are made, communicating with the under-tube annular space 19.

Depending on the volumes of gas emitted together with the liquid from the lower formation II of the well and the formation of a gas cap 20 in the under-packer annular space 19 of the pumping unit, substituting each other or a bypass assembly 21 for direct-flow pumping of the fluid by a centrifugal pump 5 from the lower formation II, or an ejector 22 for simultaneous pumping of the fluid by a centrifugal pump 5 from the lower reservoir II and bleeding of the gas cap 20 from the sub-packer annular space 19.

In the absence or presence of a gas cap 20 in the sub-packer annular space 19 in the pump installation, a bypass assembly 21 is installed below the radial channels 14 of the manifold 11, blocking the radial channels 18 in the packer barrel 2 by cuffs installed on the bypass assembly 21 on both sides of the radial channels 18 The bypass assembly 21 is provided with a plug 23, outside of which, symmetrically to the inner groove in the central hole 12 of the manifold 11, a groove is made, which seals the central part by means of cuffs the hole 12, together with the reciprocating pump 3, forms a cavity communicating via radial channels 14 with an overpack annular space 15. In the bypass assembly 21 below the plug 23 there are radial holes 24 communicating the cavity of the intermediate pipe 7 with the longitudinal channels 13 of the manifold 11 through the bypass cavity node 21, the latter is fixed in the collector 11 with a expanding collet 25 with the possibility of removing it with a rope 26 using the mounting tool 27 with a gripping hook head 28, made on the plug 23 of the through passage Ulki 21 (Figure 1).

If the permissible volume of the gas cap 20 is exceeded in the sub-packer annular space 19 in the central hole 12 below the radial channels 14 of the collector 11, an ejector 22 is installed for bleeding the gas cap 20, which is aligned with the radial channels of the gas supply to the inlet of the mixing chamber with the radial channels 18 in the trunk of the packer 2 The ejector 22 is provided with a plug 23, the outside of which, symmetrically to the internal groove in the central hole 12 of the collector 11, is made a groove. The plug 23 seals the central opening 12 by means of cuffs, together with the reciprocating pump 3, forming a cavity communicating through the radial channels 14 with the overpack annular space 15. In the ejector 22 below the plug 23 there are made radial holes 29 communicating the gas-liquid mixing chamber in the ejector 22 with longitudinal channels 13 of the collector 11. The ejector 22 is fixed in the collector 11 with an expanding collet 30 and the possibility of removing it with a rope 26 using an installation tool 27 with a gripping hook 28 made on the ejector 22. (Figure 2).

The downhole pumping unit is further provided with a centrifugal pump flushing device comprising a plug 31 sealed in the central hole 12 of the manifold 11 to form a bypass channel 32 in the manifold 11 above the seat of the bypass channel 32, which communicates with the longitudinal channels 13 of the manifold 11, on the one hand, and on the other , - with the cavity of the column of elevator pipes 1, and the bushing 33, interfaced with the plug 31 and hermetically mounted in the barrel of the packer 2 by means of cuffs located below the radial channels 18. the bushing 33 is provided with a groove, which together with the collector 11 and the packer barrel 2 has a cavity 34, which communicates the sub-packer annular space 19 through the radial channels 18 of the packer barrel 2 with the longitudinal channels 13 of the manifold 11. A blind hole 35 is made from the lower end of the tube 31, communicating with cavity of the passage sleeve 33. In the formed wall of the tube 31, radial channels 36 and an external groove are made, communicating on one side with the cavity of the passage sleeve 33 through a blind hole 35 in the tube 31, and on the other, with an overpack molecular annulus 15 through the radial channels 14 reservoir 11. The plug 31 is provided with the engagement head 28 is removably fit mounting of the pump unit 27 via the tool 26 (Figure 3) of the rope.

Depending on the volume of gas emitted together with the liquid in the lower layer of well II, the downhole pumping unit for simultaneous and separate operation of the two layers works as follows.

The complete pump installation, including an electric drive centrifugal pump 5, connected by an intermediate pipe 7 with a packer 2 made with a cable entry, a manifold 11 and a cable 9, is lowered into a certain interval of the well on the column of elevator pipes 1 and fixed with a packer 2.

In the absence or presence in the permissible volume in the under-packer annular space 19 of the gas cap 20 into the pumping unit through the column of elevator pipes 1 using the rope 26, the mounting tool 27 and the hook head 28 on the plug 23, the bypass assembly 21 is lowered, the latter is installed with a plug 23 in the central hole 12 of the collector 11 below the radial channels 14 and spontaneously fastens in the collector 11 with an expanding collet 25, blocking the radial channels 18 in the packer barrel 2. Then, to the pumping unit through the column of elevator pipes 1 n the drive rod 4 is lowered reciprocating pump 3, the last entry is set in the central opening 12 the reservoir 11 above the radial passages 14 and secured in spontaneously manifold 11 expansible collet 16.

After installing the pump unit in the well, simultaneously or separately or alternately, the reciprocating pump 3 is started from the ground drive (not shown) by the reciprocating movement of the rod 4 in the column of elevator pipes 1 and the electric drive centrifugal pump 5 by supplying electric power to the electric motor 8 via cable 9 The fluid flow pumped by the electric drive centrifugal pump 5 from the lower reservoir II through the shut-off and flush valve 10 and the intermediate pipe 7, with a pressure passes through the cavity and radial holes 24 p of the transfer unit 21, the longitudinal channels 13 of the collector 11, the cavity 17 between the reciprocating pump 3 and the collector 11, into the cavity of the column of elevator pipes 1. The fluid flow from the upper formation I, passing through the above-pack annular space 15, the radial channels 14 and the cavity in the Central hole 12 of the collector 11, is sucked up by a reciprocating pump 3 and is pumped into the cavity of the column of elevator pipes 1, in the latter, the fluids of the layers I and II are mixed and rise to the surface of the well.

If the permissible volume of the gas cap 20 is exceeded in the under-packer annular space 19, the reciprocating pump 3 is sequentially removed from the installation with the help of the drive rod 4 and the bypass assembly 21 with the help of the rope 26 and the mounting tool 27 with the catch head 28 on the plug 23 of the bypass assembly 21. Then, the ejector 22 is lowered into the pump installation through the column of elevator pipes 1 using a rope 26, an installation tool 27 and a hook head 28 on the plug 23, the latter being installed with a plug 23 in the central hole 12 the manifold 11 below the radial channels 14. The ejector 22 with radial channels for supplying gas to the entrance to the mixing chamber is combined with the radial channels 18 in the barrel of the packer 2 and spontaneously fixed in the manifold 11 with an expanding collet 30. Then, through the column of elevator pipes 1 on the drive rod 4 to the pump installation lower the reciprocating pump 3, the last inlet is installed in the Central hole 12 of the manifold 11 above the radial channels 14 and spontaneously fixed in the manifold 11 expandable collet 16.

After installing the pump unit in the well, simultaneously or separately or alternately, the reciprocating pump 3 is started from the ground drive (not shown) by the reciprocating movement of the rod 4 in the column of elevator pipes 1 and the electric drive centrifugal pump 5 by supplying electric power to the electric motor 8 via cable 9 The fluid flow pumped by the electric drive centrifugal pump 5 from the lower reservoir II through the shut-off and flush valve 10 and the intermediate pipe 7, with a pressure enters the nozzle of the ejector 22. The nozzle of the ejector 22, creating The second vacuum in front of its mixing chamber entrains the separated gas from the gas cap 20 through the radial channels 18 in the barrel of the packer 2, enters the mixing chamber of the ejector 22, where the fluid is mixed with the separated gas, after which the mixture enters through the radial holes 29 in the ejector 22, longitudinal channels 13 in the manifold 11 and the cavity 17 between the reciprocating pump 3 and the manifold 11, into the cavity of the column of elevator pipes 1. The fluid flow from the upper reservoir I, passing through the above-pack annular annular space 15 AvantGo Channels 14 and the cavity 12 in the central opening collector 11 is sucked reciprocating pump 3 and pumped into the column cavity of tubing 1, the last reservoir fluids I and II are mixed and raised to the well surface.

If necessary, rinse the electric drive centrifugal pump 5 of the downhole pump installation from the installation through the column of elevator pipes 1, the reciprocating pump 3 is sequentially removed using the drive rod 4 and the bypass assembly 21 or the ejector 22 using the rope 26 and mounting tool 27 with the hook head 28 plug 23. Then, the electric drive flushing device is lowered into the pumping unit through a column of elevator pipes 1 using a rope 26, an installation tool 27 and a hook head 28 on the plug 31 of the centrifugal pump 5 and the stopper 31 sealingly mounted in the central opening 12 and collector 11 pass in the barrel sleeve 33 of the packer 2 to communicate the bore of the outer sleeve 33 at the entrance to the radial channels 18 in the barrel 2 of the packer.

After installing the device for washing the electric drive centrifugal pump 5, the latter is put into operation by supplying electric power to the electric motor 8 via cable 9. In this case, the washing liquid is supplied through the column of elevator pipes 1, which passes through the bypass channel 32 formed between the tube 31 and the collector 11, longitudinal channels 13 in the collector 11, the cavity 34, formed jointly by a groove on the bushing 33 with the collector 11 and the barrel of the packer 2, the radial channels 18 in the barrel of the packer 2 into the under-tube annular space 19. Then the flushing fluid from the under-packer annular space 19 enters the inlet module 6 of the electric drive centrifugal pump 5, the latter pumps the fluid through the shut-off and flushing valve 10 into the intermediate pipe 7, the bushing 33, blind hole 35 and radial channels 36 in the tube 31 and radial channels 14 in the reservoir 11 into the above-pack annular annular space 15 and further to the surface of the well. After washing the electric drive pump 11, the device is removed by gripping the head 28 on the plug 31 with the mounting tool 27 using the rope 26. Thus, the centrifugal pump 5 is flushed without removing the lift pipe string, packer and centrifugal pump 5 with cable 9 during the operation of the well.

Using the proposed borehole pumping unit for simultaneous and separate operation of two layers will significantly increase the efficiency of well operation. The proposed technology for simultaneous and separate production of a product in fields with heterogeneous formations complies with the requirements of the Rules for the Protection of Subsurface Resources approved by the Decree of the Gosgortekhnadzor of the Russian Federation No. 71 of June 06, 2003.

Claims (3)

1. A downhole pump installation for simultaneous and separate operation of two layers, comprising a column of elevator pipes, a packer with cable entry, a reciprocating pump with a drive rod for pumping product from the upper layer and an electric drive centrifugal pump with an inlet module and a check valve for pumping product from the lower layer of the well, connected by an intermediate pipe to the packer barrel, the electric motor of which is hermetically connected to the power cable from the ground control station, and an ejector for pouring the gas cap from the under-packer annular space with the possibility of fixing the installation with a spreading collet and removing it with a rope using an installation tool with a hook head made on an ejector, characterized in that the installation includes a hydraulic manifold connected on one side to the column of elevator pipes, and on the other hand, with a packer barrel, a central hole with an internal groove is made in the collector, longitudinal channels are made parallel to it in the wall, between which the wall is symmetrical radial channels are made about the groove, communicating the central hole of the collector with an over-packer annular space, while a reciprocating pump is fixed in the collector by means of a expanding collet, hermetically installed by the inlet in the central hole above the radial channels with the formation in the collector above the seat of the cavity communicating with the longitudinal channels the collector, on the one hand and on the other, with the cavity of the column of elevator pipes, and below the radial channels of the collector, were installed in the central hole an ejector or a bypass assembly that replace each other under the condition of the presence or absence of a gas cap in the under-packer annular space is made with a plug tightly covering the central hole, while the bypass assembly simultaneously overlaps the radial channels made in the packer trunk below the annular cuffs, separating the layers wells, and below the plug in the bypass assembly and ejector made radial holes communicating the cavity of the intermediate pipe with the longitudinal channels of the collector, in the last repusknoy assembly secured by expansible collet removably via a rope and the insertion tool such that the bypass member is provided with the engagement head. 2. The downhole pump installation according to claim 1, characterized in that it is additionally equipped with a device for flushing a centrifugal pump, comprising a plug tightly installed in the central hole of the collector with the formation of a cavity communicating with the longitudinal channels of the collector on the one hand, and on the other hand cavity of the column of elevator pipes, and a bushing coupled to the plug and hermetically mounted in the packer barrel, on the outside of which a groove is made, forming a cavity that communicates the sub-packer annular space through the radial channels of the packer barrel with the radial channels of the collector, for which a blind hole is made from the bottom end of the tube communicating with the cavity of the bushing, and radial channels and an external groove are made in the formed wall of the tube, communicating on one side with the cavity of the bushing through the blind a hole in the plug, and on the other hand, with an over-pack annular space through the radial channels of the collector, while the plug is equipped with a hook head with the ability to remove the device from us Fitting waist mounting tool using a rope. 3. The downhole pumping unit according to claim 1, characterized in that the circulation-type shut-off and flushing valve can be installed as a check valve.

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