RU2557023C2 - Control unit and produced fluid flow meter for multipay well (versions) - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: group of inventions is referred to versions of a control unit and a produced fluid flow meter for a multipay well. According to the first version the unit comprises a body limited from bellow by a docking device with channels for formation fluid flows and from above by a docking device with adjustable valves installed on it in the quantity equal to that of operated formations. In the body there are interconnected cups, which are coupled hermetically by their hollow butt end to the upper docking device, and cylinders installed by the opposite end in the respective channels of the lower docking device thus forming a tubular annulus and to detached longitudinal channels intended for fluid flows from the respective formations at the wellhead. In the cups there is a crossover seat with radial channels in the cup wall along both sides of the seat. Below the crossover seat from the side of the cup end there are radial channels. Above the crossover seat there is a needle valve made as a slide; at the latter there is a gasket, which facilitates the sealed movement of the needle valve in the cup from an electric drive placed in the sealed part of the cup and fixed in the docking device transferring reciprocal motion to the needle valve in regard to the crossover seat. Electric drives of the needle valves are equipped with devices measuring linear movements of the needle valve with Hall sensors. In the longitudinal channels of the cylinders there are instruments coupled functionally by a cable to a telemetry unit and/or well power supply and/or control point placed in the cup wall so that it may transmit control commands to adjustment valves and data on process parameters of the fluid in the well formations through a cable connector. In the second version of the unit in the cup below the crossover seat there is a channel axial to the crossover seat connecting the longitudinal channel to the tubular annulus and the instruments are placed in the wall of each cylinder and interconnected by a cable in the tubular annulus.

EFFECT: improved reliability for the dual operation of the multipay wells.

4 cl, 2 dwg

Description

The group of inventions relates to the field of oil production, in particular to devices that ensure efficient operation of well installations, and can be used for simultaneous and separate operation of multilayer wells.

A known unit for regulating and accounting for fluid production from a multilayer well as part of an intelligent downhole valve control system for extracting fluids from several intervals of a well, comprising at least two annular channels with the possibility of directing flows from different layers into their corresponding concentric channels, and valves made with the ability to control the flow in each of the channels. The valves are located in the casing of the wellbore with the possibility of separate flows through concentric channels and selective mixing of flows in the tubing string. Each channel is associated with an actuated valve. The system may further comprise at least one controller with a sensor for measuring at least one parameter of the produced product, functionally interconnected, with the ability to automatically control at least one valve in accordance with information received from the sensor. The measured parameter can be selected from the group including pressure, temperature, chemical composition, water content, pH, solids content, tendency to form a solid precipitate, and resistivity. The system provides effective selective control of the flow rate from a large number of formations prior to mixing inside the well by means of valves installed inside the well without significant complication and increase in the surface and underground layouts. (Patent RU No. 2320850 C2. Intelligent downhole valve control system for extracting fluids from several intervals of the well and a method for controlling such extraction of fluids. - IPC E21B 34/06, E21B 43/14. - Publish. 03/27/2008).

A known unit for regulating and recording fluid production from a multilayer well as part of a device for simultaneously and separately operating a multilayer well. The unit for controlling and recording fluid production from a multilayer well comprises a housing with openings made opposite each production formation, valve sleeves with spring ring retainers and gripping elements mounted in the housing opposite each of its openings with axial movement, a control mechanism for launching into the well from the day surfaces and movement of valve sleeves to open or close housing openings and packers. Outside the casing, opposite each of its openings, adjustable valves are installed. Each adjustable valve consists of a hollow glass, inside of which a sleeve with a seat is placed, and a ball spring-loaded from top to bottom, placed on the seat of the sleeve. Adjustable valves allow you to operate the corresponding productive formations when the specified pressure values are exceeded by adjusting the ball spring compression force for each adjustable valve separately, while the gripping elements of the valve sleeves are made in the form of their lower ends, and the inner diameter of each of the valve sleeves decreases from top to bottom. (Patent RU No. 2339796 C1 for the invention. Device for simultaneous and separate operation of a multilayer well. - IPC: E21B 43/14, E21B 34/06. - Publish. 11.27.2008).

A known unit for regulating and recording fluid production from a multilayer well as part of an installation for simultaneous and separate operation of a multilayer well with a telemechanical system. Control and metering units for fluid production from a multilayer well are installed in cross-fluid couplings of wells and contain control valves made in glasses with a bypass saddle and control and measuring devices, the latter are located above and / or below the control valve, interconnected by a geophysical cable placed in the channel made in the wall of the glass. At the same time, the control and flow control units are interconnected by geophysical cables and connected to the well control point by a telemechanical transmission system of control commands to the control valves from the control point and control information about the technological parameters of the fluid in the well strata from the control and measuring devices in the opposite direction with signal separation, through geophysical and power cables through a cable connector and adapter. The blocks of regulation and accounting of the flow rate of the seams are made with the possibility of alternating landing them from the wellhead into the nests of the respective couplings and dismantling during repair and maintenance. Geophysical cables in the sections between the support flange and the formation flow control and accounting units are placed in telescopic tubes equipped with compression springs, with the possibility of changing the distance between the control and production flow control units during the dismantling and their alternate placement in the corresponding fluid cross-couplers. An electric drive locking needle is installed in the glass cavity from the open end side, interacting with the overflow seat, the electric drive of which, upon command from the control point, informs the locking needle of the reciprocating movement with the possibility of regulating fluid flow from the corresponding formation through the radial channels of the coupling and the glass cavity into the body cavity through windows made in the wall of the glass on both sides of the bypass saddle. Fluid cross-flow couplings are made with a nozzle in which control and measuring instruments are located, at least a fluid flow meter of the corresponding well formation. The telemechanical control system for the units for controlling and accounting for the flow rate of the formations is equipped with an interface for transmitting control commands to the control valves from the well control point and information from the instrumentation in the opposite direction through the GPRS communication system. (Patent No. 2512228 C1 for the invention “Installation for simultaneous and separate operation of a multilayer well with a telemechanical system.” - IPC: E21B 43/14, E21B 47/12. - 10.04.2014). This invention is taken as a prototype.

A known unit for controlling and recording fluid production from a multilayer well as part of a well production rate control system is connected by a housing from below to the outlet of tubular elements of the central and annular channels for directing fluid flows from different layers of the well by means of a docking unit, and above by means of a nozzle with an electric drive of a centrifugal pump. In the housing of the control unit and metering fluid production in each channel, adjustable valves are installed in the form of slide valves with electric actuators, located in separate channels communicating with the central and annular channels of tubular elements through the locking seats of the adjustable valves of the docking unit. In the wall of each separate channel, windows are made for communicating them with the casing cavity for further selective mixing of fluid flows from all channels. In the unit for regulating and recording fluid production, there is a processor for automatic control of adjustable valves, connected by a communication cable placed in the pipe, through a power cable to the power point of the centrifugal pump and to control the well. A telemetry unit is placed in the pipe, connected by a communication cable, on the one hand, to a power supply and well control cable, and, on the other hand, to an automatic control processor of adjustable valves. (Patent RU No. 2482267 C2 for the invention “System for controlling the flow rate of a well.” - IPC: E21B 43/12. - 05/20/2013). This invention is taken as a prototype.

A disadvantage of the known technical solutions adopted for the prototype is the low reliability of the adjustable valves, which reduces the management efficiency of simultaneous and separate operation of a multilayer well.

The main task to be solved by the claimed invention is aimed at improving the reliability of multilayer wells with the ability to quickly change the operating mode of each formation in the well in real time and monitor the actual changes in the parameters of the fluid of the well product, including flow rate, pressure, temperature, chemical composition, pH , water and particulate matter, a tendency to form gravel and sand packing, and resistivity.

The technical result is to increase the reliability of simultaneous and separate operation of the well with optimal control of the phase composition of the fluid from the wellbore in real time.

The specified technical result is achieved by the fact that in the known unit for regulating and accounting for fluid production from a multilayer well containing a housing with separate longitudinal channels in an amount equal to the number of exploited well strata, limited from below by a docking unit with return channels for fluid flows from the well strata, from above the body limited by a docking unit with adjustable valves mounted on it, made in glasses, the electric drive of which tells the locking needle reciprocating movement relative to the overflow seat with the possibility of regulating fluid flow from the corresponding formation through radial channels in the wall of the cup on both sides of the overflow seat, with adjustable valves placed in each separate longitudinal channel of the body, the walls of which are made windows for communication with the annular cavity of the well, and instrumentations located below and / or above the adjustable valve and functionally connected by cable to the telemetry unit and / or control center and power supply wells located in the channel made in the wall of the glass, with the possibility of transmitting control commands to the control valves and control information about the technological parameters of the fluid in the reservoir from the control devices through the cable connector, according to the proposed technical solution,

the electric drives of the locking needles are placed in the sealed cavities of the glasses, for which the glasses with a hollow end are hermetically connected to the upper docking unit, and the locking needles are made in the form of a spool on which an oil seal is installed, by means of which the locking needle is hermetically moved in the glass, while the cylinders are additionally placed in the housing in an amount equal to the number of exploited well strata that are connected with the top of the corresponding adjustable valve to the upper end and installed in the channels neither the bottom of the docking unit, forming separate longitudinal channels with fluid flows from the corresponding well strata into the bypass saddles of the adjustable valves and together with the body form annular spaces communicating with the annular cavity of the well through windows in the body wall, and the above instrumentation is placed in the cavity of each cylinder and attached to the end of the glass, for which the radial channels in the glass below the bypass saddle are made from the side of the end of the glass;

electric drives of locking needles are equipped with devices for measuring linear movements of the locking needle, for example, with a Hall sensor.

The specified technical result is achieved by the fact that, in the known unit for regulating and accounting for fluid production from a multilayer well, comprising a housing with separate longitudinal channels in an amount equal to the number of exploited well strata, limited from below by a docking unit with return channels for fluid flows from the well strata, from above the casing is limited by a docking unit with adjustable valves mounted on it, made in glasses, the electric drive of which tells the locking needle back and forth movement relative to the overflow seat with the possibility of regulating fluid flow from the corresponding formation through radial channels in the wall of the cup on both sides of the overflow seat, with adjustable valves placed in each separate longitudinal channel of the body, the walls of which are made windows for communication with the annular cavity of the well, and control and measuring devices located below and / or above the adjustable valve and functionally connected by cable to the telemetry unit and / or control center and electrical anija wells placed in the channel formed in the wall of the cup, to transmit control commands to the adjusting valve and the control information about the process parameters of the fluid in the formations from the borehole instrumentation via a cable connector according to the proposed technical solution,

the electric drives of the locking needles are placed in the sealed cavities of the glasses, for which the glasses with a hollow end are hermetically connected to the upper docking unit, and the locking needles are made in the form of a spool on which an oil seal is installed, by means of which the locking needle is hermetically moved in the glass, while the cylinders are additionally placed in the housing in an amount equal to the number of exploited well strata that are connected with the top of the corresponding adjustable valve to the upper end and installed in the channels neither the bottom of the docking unit, forming separate longitudinal channels with fluid flows from the corresponding well strata into the bypass seats of the adjustable valves and together with the body form annular spaces communicating with the annular cavity of the well through windows in the body wall, while the channel below the bypass seat is made axial with the bypass seat an adjustable valve communicating the cylinder cavity with the annular space, and the above instrumentation is installed in the wall of each cylinder pa and associated cable on the outside of the cylinder;

electric drives of locking needles are equipped with devices for measuring linear movements of the locking needle, for example, with a Hall sensor.

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 that are identical to all the features of the claimed options for the control unit and metering fluid production from a multilayer well. 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 claimed group of technical solutions have shown that they do not explicitly follow 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 solutions meet the condition of patentability "inventive step".

The claimed technical solutions can be implemented at any engineering enterprise from well-known materials and accepted technology and used in downhole oil and gas production facilities. Therefore, the claimed group of technical solutions meets the condition of patentability "industrial applicability".

In FIG. 1 schematically shows a control and accounting unit for fluid production from a multilayer well, option 1; in FIG. 2 - the same, option 2.

According to the first embodiment, the control and accounting unit for fluid production from a multilayer well comprises a housing 1 bounded below by a docking unit 2 with channels 3 and above by a docking unit 4 with adjustable valves installed on it in an amount equal to the number of well strata operated. In the housing 1 there are placed mating glasses 5, which are hollow end hermetically mated with the upper docking unit 4, and cylinders 6, the latter with the opposite end mounted in the corresponding channels 3 of the lower docking unit 2, forming the annular space 7 and separate longitudinal channels 8 for fluid flows from the corresponding strata at the wellhead. In the cups 5, a bypass saddle 9 is made with radial channels 10 and 11 in the wall of the cup 5 on both sides of the bypass saddle 9, communicating longitudinal channels 8 with the annular cavity of the well through the annulus 7 and the windows 12 made in the wall of the housing 1. Radial channels 10 in the glass 5 below the bypass seat 9 is made from the end face of the glass 5. Above the bypass seat 9, a locking needle 13 is installed in the base of the glass 5, made in the form of a spool, on which the gland 14 is located, by means of which the locking needle 13 is hermetically sealed is sealed in the cup 5 from the electric drive 15, placed in the sealed cavity 16 of the cup 5 and fixed in the docking unit 4, which informs the shut-off needle 13 of the reciprocating motion relative to the bypass seat 9 with the possibility of regulating the fluid flow from the corresponding formation through the channels 3 of the docking unit 2 at the mouth wells. The actuators 15 of the locking needles 13 are equipped with devices for measuring the linear movements of the locking needles 13 with Hall sensors. Below the nozzle 5 in the longitudinal channels 8 are measuring instruments 17, functionally connected by a cable 18 with a telemetry unit and / or a well control and power supply unit (not shown conditionally), located in the channel made in the nozzle wall 5, with the possibility of transmitting control commands control valves and control information about the technological parameters of the fluid in the well strata from the control instruments 17 through a cable connector 19 located in the column of elevator pipes 20. Measured parameters m They can be selected from the group consisting of flow rate, pressure, temperature, chemical composition, water content, pH, solids content, tendency to form a solid precipitate, and resistivity. (Fig. 1).

In the second version of the control unit and metering fluid production from a multilayer well in a nozzle 5 below the bypass saddle, a channel 21 is made, axial to the bypass saddle 9, which communicates the longitudinal channel 8 with the annular space 7, and the instrumentation 22 is installed in the wall of each cylinder 6 and connected cable 23 in the annulus 7. (Fig. 2).

The proposed blocks of regulation and accounting of fluid production from a multilayer well work as follows.

After the installation of the well installation, containing the control unit and metering fluid production from a multilayer well, connected by a cable 18 to the telemetry unit and / or the control unit and the power supply of the well, the well installation is switched on and the fluid of different layers begins to separately enter the annular cavity of the well through channels 3 docking unit 2. Through cables 18 and 23 through the cable connector 19, power is supplied to the measuring instruments 17 or 22 and control signals to the electric drives 15 of the locking needles 13. Also by the cables 18 and 23 in the opposite direction transmit information about the measured parameters of the formation fluids and the degree of opening in the bypass seats 9 with locking needles 13 in the cups 5. When regulating the opening of the bypass seats 9 with locking needles 13, the formation fluids rise along separate longitudinal channels 8 in the cylinders 6, washing instrumentation 17 or 22, through radial channels 10 or axial channel 21 through the bypass saddle 9, radial channels 11, annulus 7, windows 12 in the wall of the housing 1 into the annular cavity of the wells other. The ability of the unit to work in the mode of regulation and accounting for fluid production from different layers of the well separately allows each layer to be examined separately, i.e. determine flow rate, pressure, temperature, chemical composition, pH, water and solids content, a tendency to form solid sediment and resistivity, and arrange periodic maintenance pumping of formation fluid from each formation with different technological parameters and with different cycles by the ground support staff, without stopping the operation of the well as a whole, with the possibility of selective mixing of fluid flows from all operating well strata.

Using the proposed control unit and accounting fluid production from a multilayer well will improve the reliability of simultaneous and separate operation of multilayer wells.

Claims (4)

1. The control and accounting unit for fluid production from a multilayer well, comprising a casing with separate longitudinal channels in an amount equal to the number of exploited well strata, bounded from below by a docking unit with return channels for fluid flows from the strata of the well, and from above the casing is limited by a docking station with mounted on it adjustable valves made in cups, the electric drive of which tells the locking needle the reciprocating movement relative to the overflow seat with the possibility of adjustable the flow of fluid from the corresponding formation through radial channels in the wall of the glass on both sides of the bypass seat, while the adjustable valves are placed in each separate longitudinal channel of the housing, the walls of which are made windows for communication with the annular cavity of the well, and instrumentation located below and / or above the adjustable valve and functionally connected by a cable to the telemetry unit and / or the control and power point of the well, located in the channel made in the glass wall , with the possibility of transmitting control commands to the control valves and control information about the technological parameters of the fluid in the wellbore from the control and measuring devices through a cable connector, characterized in that the electric shut-off needles are placed in the sealed cavities of the glasses, for which the glasses are hollow end hermetically connected to the upper docking knot, and locking needles are made in the form of a spool on which an oil seal is installed, by means of which the locking needle is hermetically moved in a glass, while additionally, cylinders are placed in the housing in an amount equal to the number of exploited well strata, which are connected with the top of the corresponding adjustable valve cup and the opposite end are installed in the channels of the lower docking unit, forming separate longitudinal channels with fluid flows from the corresponding strata of the well into the bypass seats of the adjustable valves, and together with the body form annular spaces communicating with the annular cavity of the well through windows in the wall of the body, and the above These control and measuring devices are placed in the cavity of each cylinder and attached to the end of the cup, for which the radial channels in the cup below the bypass saddle are made from the side of the cup end. 2. The block according to claim 1, characterized in that the electric drives of the locking needles are equipped with devices for measuring the linear movements of the locking needle, for example, with a Hall sensor. 3. The unit for regulation and accounting of fluid production from a multilayer well, comprising a casing with separate longitudinal channels in an amount equal to the number of exploited well strata, bounded from below by a docking unit with return channels for fluid flows from the strata of the well, and from above the casing is limited by a docking station with mounted on it adjustable valves made in cups, the electric drive of which tells the locking needle the reciprocating movement relative to the overflow seat with the possibility of adjustable the flow of fluid from the corresponding formation through radial channels in the wall of the glass on both sides of the bypass seat, while the adjustable valves are placed in each separate longitudinal channel of the housing, the walls of which are made windows for communication with the annular cavity of the well, and instrumentation located below and / or above the adjustable valve and functionally connected by a cable to the telemetry unit and / or the control and power point of the well, located in the channel made in the glass wall , with the possibility of transmitting control commands to the control valves and control information about the technological parameters of the fluid in the wellbore from the control and measuring devices through a cable connector, characterized in that the electric shut-off needles are placed in the sealed cavities of the glasses, for which the glasses are hollow end hermetically connected to the upper docking knot, and locking needles are made in the form of a spool on which an oil seal is installed, by means of which the locking needle is hermetically moved in a glass, while additionally, cylinders are placed in the housing in an amount equal to the number of exploited well strata, which are connected with the top of the corresponding adjustable valve cup and the opposite end are installed in the channels of the lower docking unit, forming separate longitudinal channels with fluid flows from the corresponding strata of the well into the bypass seats of the adjustable valves, and together with the casing they form annular spaces communicating with the annular cavity of the well through windows in the casing wall, while al is formed below the overflow seat axial seat with adjustable overflow valve communicating with the cylinder chamber annulus, and the above measuring instruments installed in the wall of each cylinder and associated cable on the outside of the cylinder. 4. The block according to claim 3, characterized in that the electric drives of the locking needles are equipped with devices for measuring the linear movements of the locking needle, for example, with a Hall sensor.

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