US20050121190A1 - Segregated deployment of downhole valves for monitoring and control of multilateral wells - Google Patents
Segregated deployment of downhole valves for monitoring and control of multilateral wells Download PDFInfo
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- US20050121190A1 US20050121190A1 US10/730,470 US73047003A US2005121190A1 US 20050121190 A1 US20050121190 A1 US 20050121190A1 US 73047003 A US73047003 A US 73047003A US 2005121190 A1 US2005121190 A1 US 2005121190A1
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- Prior art keywords
- wellbore
- tubular string
- lines
- line
- wellbores
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0035—Apparatus or methods for multilateral well technology, e.g. for the completion of or workover on wells with one or more lateral branches
Definitions
- the present invention relates generally to operations performed and equipment utilized in conjunction with a subterranean well and, in an embodiment described herein, more particularly provides a well completion, system and method for controlling and monitoring fluid flow in multilateral wells.
- a flow control device/sensor used to control/monitor production from a lower portion of the main wellbore may be positioned a relatively large distance from a zone in which the production originates, for example, when the flow control device/sensor is positioned above an intersection between the main and branch wellbores. Flow between a wellbore and a zone intersected by the wellbore is more conveniently and accurately monitored and controlled when a device used to monitor/control such flow is positioned in the wellbore in closer proximity to the zone.
- Lines such as hydraulic, electric, fiber optic, etc. lines, which are used to remotely operate and communicate with the flow control devices and sensors may be attached to a tubing string on which the flow control devices and sensors are conveyed into a well. If flow control devices and sensors are to be positioned in branch wellbores as well as in the main wellbore, there exists a need to conveniently and reliably provide for the lines extending into the branch wellbore(s), without requiring interruptions (breaks or disconnections) in the lines or requiring lines to be “wet” connected while downhole.
- a well completion system in another aspect of the invention, includes two or more tubular strings.
- One of the tubular strings extends in a wellbore, and another tubular string extends in another wellbore intersecting the first wellbore.
- Lines are attached to the tubular strings. At least one of the lines extends with the first tubular string in the first wellbore, and at least one of the lines extends with the other tubular string in the other wellbore.
- a method of completing a well including intersecting wellbores includes the steps of: conveying at least one line into each of the wellbores; and performing the conveying step without making any connections in the line in the well.
- FIG. 1 is a partially cross-sectional schematic view of an initial configuration of a well completion system embodying principles of the present invention
- FIG. 2 is a partially cross-sectional view of a final configuration of the well completion system of FIG. 1 ;
- a tubular string 12 such as a production tubing string, is being used to convey two other tubular strings 14 , 16 into a parent or main wellbore 18 .
- the main wellbore 18 may be lined with protective casing or liner 20 , or any portion of the wellbore may be completed open hole, if desired.
- branch wellbore 22 intersects the main wellbore 18 at an intersection 24 .
- the branch wellbore 22 may be lined with a liner 26 , or any portion of the branch wellbore may be completed open hole, if desired.
- a whipstock or deflector 28 is positioned in the main wellbore 18 adjacent and just below the intersection 24 .
- the term “below” means relatively farther along a wellbore from the earth's surface. Conversely, the term “above” means relatively closer to the earth's surface along a wellbore. Thus, the terms “above” and “below” may accurately describe a relative position in a wellbore, even if the wellbore is horizontal.
- the deflector 28 may have been used to drill the branch wellbore 22 , or it may have been positioned in the main wellbore 18 after drilling the branch wellbore.
- the deflector 28 includes a bore 30 extending longitudinally therethrough.
- An upper inclined surface 32 of the deflector 28 is oriented so that it faces toward the branch wellbore 22 .
- each of the tubular strings 14 , 16 is a flow control device 44 , such as a valve or choke, etc., and a sensor 58 .
- the flow control devices 44 are remotely controlled, for example, via one or more lines 46 extending to a remote location, such as the earth's surface or another position in the well.
- the sensors 58 also communicate with the remote location via the lines 46 .
- the lines 46 may be hydraulic, electric, fiber optic, or another type of line.
- the flow control devices 44 and/or sensors 58 may be controlled and/or monitored remotely via telemetry without use of the lines 46 .
- the flow control devices 44 and sensors 58 could be controlled and/or monitored remotely using acoustic, pressure pulse, electromagnetic, or any other type of telemetry.
- the flow control devices 44 may be Interval Control Valves commercially available from WellDynamics, Inc. of Spring, Tex. These Interval Control Valves not only control flow between a tubular string and a zone intersected by a wellbore, they may also include the ability to monitor certain well parameters. For example, an optical fiber in one of the lines 46 connected to the flow control devices 44 may be used in distributed temperature sensing.
- the sensors 58 may include pressure, temperature, flow rate, resistivity, fluid identification, water cut, or any other type of sensors. As with the flow control devices 44 , the relative position of the sensors 58 in the tubular strings 14 , 16 may be changed, if desired. The sensors 58 may be positioned internal or external to the tubular strings 14 , 16 , and may detect properties of substances internal or external to the tubular strings.
- a junction 48 is provided between the tubular strings 12 , 14 , 16 . Via the junction 48 , each of the tubular strings 12 , 14 , 16 is in communication with each of the other tubular strings. This is similar in many respects to the Isolated Tie-Back System commercially available from Halliburton Energy Services, Inc. of Houston, Tex. However, it should be clearly understood that such communication between the tubular strings 12 , 14 , 16 is not necessary in keeping with the principles of the invention.
- the tubular string 14 includes a bull nose 50 at a lower end thereof, in order to deflect the tubular string into the branch wellbore 22 . That is, the deflector 28 is configured so that it is selective, deflecting the tubular string 14 off of the surface 32 into the branch wellbore 22 , but permitting the tubular string 16 to pass through the bore 30 and into a lower portion 52 of the main wellbore 18 .
- the bull nose 50 may have a larger outer diameter than an inner diameter of the bore 30 , the bull nose may be shaped in a manner otherwise preventing it from passing into the bore, etc.
- the system 10 is representatively illustrated in a configuration in which the tubular string 14 has been deflected into the branch wellbore 22 , and the tubular string 16 has passed through the bore 30 into the lower portion 52 of the main wellbore 18 .
- the sealing devices 42 on the tubular strings 14 , 16 have sealingly engaged the respective bores 38 of the assemblies 36 in the branch wellbore 22 and in the lower portion 52 of the main wellbore 18 .
- the sealing devices 42 could sealingly engage other structures in the wellbores 18 , 22 , for example, the sealing devices could be packers or liner hangers which sealingly engage the casing 18 and liner 26 , without use of the assemblies 34 , 36 .
- the flow control devices 44 are positioned in close proximity to the respective zones 54 , 56 , enhancing the proper and accurate operation of the flow control devices to achieve a desired rate or quantity of flow therethrough. Monitoring parameters of the well completion using the sensors 58 is also performed in close proximity to the zones 54 , 56 , thereby enhancing the accuracy of these measurements.
- the ability to remotely control the flow control devices 44 and monitor the sensors 58 via the lines 46 coupled with the enhanced accuracy provided by the positioning of the flow control devices and sensors, permits precise control and monitoring of production and/or injection operations in the well.
- the lines 46 attached to the tubular strings 12 , 14 , 16 are installed in a manner that does not require interruptions in the lines and does not require any “wet” connections between lines while downhole. Instead, the lines 46 continue to be operably connected to the flow control devices 44 and sensors 58 , and extend unbroken to the remote location, during the installation of the tubular strings.
- FIG. 3 another multilateral well completion system 60 is representatively illustrated.
- the system 60 is similar in many respects to the system 10 described above, and so elements of the system 60 which are similar to elements of the system 10 described above are indicated in FIG. 3 using the same reference numbers.
- the tubular strings 12 , 14 , 16 are being conveyed into the main or parent wellbore 18 , similar to the system 10 as shown in FIG. 1 .
- another branch wellbore 62 intersects the main wellbore 18 at an intersection 64 .
- a deflector 66 has been positioned just below the intersection 64 , and has been oriented so that an upper inclined deflection surface 68 faces toward the branch wellbore 62 .
- the deflector 66 has a bore 70 extending therethrough which is large enough for the tubular strings 14 , 16 to pass through side-by-side. Thus, as the tubular strings 12 , 14 , 16 are further lowered in the main wellbore 18 , the tubular strings 14 , 16 will both enter the bore 70 and pass through the deflector 66 .
- the system 60 is depicted in a configuration in which the tubular strings 14 , 16 have passed through the deflector 66 .
- Further conveyance of the tubular strings 12 , 14 , 16 into the main wellbore 18 causes the tubular string 14 to deflect off of the deflector surface 32 and into the branch wellbore 22 , as described above for the system 10 .
- Still further conveyance of the tubular strings 12 , 14 , 16 into the main wellbore 18 causes the tubular string 16 to enter the bore 30 of the deflector 28 , also as described above for the system 10 .
- tubular string 72 is connected to the tubular string 12 by means of another junction 48 .
- the tubular string 72 is similar to the tubular string 14 , in that it includes a sealing device 42 , a flow control device 44 and a sensor 58 .
- the lines 46 extend to the flow control device 44 and sensor 58 on the tubular string 72 .
- the junction 48 provides communication between the tubular strings 12 , 72 and another tubular string 74 connected thereabove and extending to a remote location.
- the tubular string 74 is, thus, used to convey the other tubular strings 12 , 14 , 16 , 72 into the main wellbore 18 .
- tubular string 74 conveys the other tubular strings 12 , 14 , 16 , 72 into the main wellbore 18 , the tubular strings 14 , 16 pass through the deflector 66 , as described above.
- the tubular string 12 also enters the bore 70 of the deflector 66 after the lower junction 48 enters the bore 70 .
- the tubular string 12 is already in the bore 70 .
- the tubular string 72 includes a bull plug 76 or other device at its lower end which prevents the tubular string 72 from entering the bore 70 while the tubular string 12 is in the bore.
- the bull plug 76 may be sized or otherwise configured so that it cannot fit into the bore 70 while the tubular string 12 is in the bore. Instead, the tubular string 72 is deflected by the surface 68 into the branch wellbore 62 .
- the tubular string 72 may be deflected into the branch wellbore 62 at about the same time as the tubular string 14 is deflected into the branch wellbore 22 .
- the tubular string 72 may be deflected into the branch wellbore 62 before or after the tubular string 14 is deflected into the branch wellbore 22 .
- the sealing devices 42 are set or otherwise sealingly engaged in the respective wellbores 18 , 22 , 62 .
- the sealing device 42 on the tubular string 14 is sealingly engaged with the liner 26
- the sealing device 42 on the tubular string 16 is sealingly engaged in the bore 30
- the sealing device 42 on the tubular string 72 is sealingly engaged in a liner 78 in the branch wellbore 62
- a sealing device 42 on the tubular string 12 is sealingly engaged in the bore 70 .
- the sealing devices 42 may be otherwise positioned in the wellbores 18 , 22 , 62 , and may be otherwise sealingly engaged in the wellbores, in keeping with the principles of the invention.
- the flow control device 44 on the tubular string 14 can now control fluid flow from the zone 54
- the flow control device 44 on the tubular string 16 can now control flow from the zone 56
- the flow control device 44 on the tubular string 72 can now control fluid flow from a formation or zone 80 intersected by the wellbore 62 .
- the sensors 58 can be used to monitor these respective fluid flows, or to detect other parameters in the well.
- the lower junction 48 commingles the flows from the tubular strings 14 , 16 into the tubular string 12 .
- the upper junction 48 commingles the flows from the tubular strings 12 , 72 into the tubular string 74 for production to the surface. For an injection well, these flow directions may be reversed.
- the lines 46 are extended into multiple branch wellbores 22 , 62 , while also extending in the main wellbore 18 .
- This positioning of the lines 46 is accomplished in the system 60 without interruptions in the lines and without requiring any “wet” connections between lines downhole. Instead, the lines 46 extend continuously from the sensors 58 and flow control devices 44 to the remote location. This enhances the reliability and performance of the lines 46 , while reducing the complexity of the completion operation.
- the lines 46 extend through the sealing device 42 on the tubular string 12 .
- This configuration may be accomplished at the surface using “dry” connections (i.e., connections made between lines while at the surface) at upper and lower ends of the sealing device 42 , without compromising the reliability or performance of the lines when installed.
- branch wellbores 22 , 62 are depicted in FIGS. 3 & 4 , it will be readily appreciated that any increased number of branch wellbores may be provided for by increasing the number of tubular strings deflected into the respective branch wellbores, and increasing the number of deflectors, junctions, flow control devices, sensors, etc., as needed.
- the lines 46 can extend into any number of branch wellbores to any number of flow control devices, sensors, etc., without interruptions in the lines and without requiring any “wet” connections between lines downhole.
- FIG. 5 another well completion system go is representatively illustrated.
- the system go is similar in many respects to the systems 10 , 60 described above, and so elements of the system go which are similar to elements of the systems 10 , 60 described above are indicated in FIG. 5 using the same reference numbers.
- a tubular string 92 is deflected off of the inclined surface 32 of the deflector 28 and into the branch wellbore 22 .
- the tubular string 92 is connected to another tubular string 94 via a junction or wye block 96 .
- the wye block 96 permits access to each of the tubular strings 92 , 94 , and flow through each of the tubular strings is commingled in the wye block.
- the tubular string 94 is sealingly engaged in the bore 30 of the deflector 28 .
- Attached below the deflector 28 is another tubular string 98 positioned in the lower portion 52 of the main wellbore 18 .
- the tubular string 98 is installed with the deflector 28 and anchoring device 40 prior to conveying the tubular strings 92 , 94 into the well using the tubular string 12 .
- the tubular string 98 has the flow control device 44 , lines 46 and sensor 58 interconnected therein when it is installed.
- a “wet” connection 100 is made when the tubular string 94 is engaged with the deflector 28 .
- one connector may be attached to the deflector 28 and operably coupled to the lines 46 on the tubular string 98
- another connector may be attached to the tubular string 94 and operably coupled to the lines on the tubular string 94 .
- the connectors mate to form the connection 100 .
- the system go does include the “wet” connection 100 , it is positioned in the main wellbore 18 where it is more conveniently accessible in the event of a malfunction. Note that the lines 46 on the tubular string 92 extending into the branch wellbore 22 extend continuously from the flow control device 44 and sensor 58 to the remote location, without requiring any “wet” connections to be made downhole.
- FIG. 6 another well completion system 110 is representatively illustrated.
- the system 110 is similar in many respects to the systems 10 , 60 , go described above, and so elements of the system 110 which are similar to elements of the systems 10 , 60 , go described above are indicated in FIG. 6 using the same reference numbers.
- a tubular string 112 is deflected off of the inclined surface 32 of the deflector 28 and into the branch wellbore 22 .
- the sealing device 42 carried on a lower end of the tubular string 112 sealingly engages the assembly 36 previously positioned in the branch wellbore 22 , for example, by sealingly engaging the anchoring device 40 .
- An upper end of the tubular string 112 remains in the main wellbore 18 and is connected to a junction 114 secured in the main wellbore by an anchoring device 116 , such as a packer.
- the junction 114 has an inner passage 118 which provides fluid communication between the tubular string 112 and an annulus 120 formed between the tubular string 12 and the main wellbore 18 above the junction.
- An opening 122 in the tubular string 12 permits fluid communication between the annulus 120 and the interior of the tubular string.
- Another tubular string 124 extends downwardly from the junction 114 and is sealingly engaged in the bore 30 of the deflector 28 . Similar to the system 90 depicted in FIG. 5 , the tubular string 98 is connected below the deflector 28 and is installed in the main wellbore 18 prior to running the junction 114 and tubular strings 112 , 124 into the well. The “wet” connection 100 is made between the lines 46 connected to the tubular string 98 and the lines connected to the tubular string 124 when the tubular string 124 engages the deflector 28 .
- the tubular string 124 is in fluid communication with another passage 126 formed through the junction 114 .
- the passage 126 is, in turn, in fluid communication with the tubular string 12 .
- fluids from the tubular strings 124 , 112 are commingled in the tubular string 12 .
- the tubular string 12 is sealingly engaged with the junction 114 by means of seals 128 carried on the tubular string, which are inserted into the passage 126 , or into a seal bore at an upper end of the passage.
- connection 100 is formed between the lines 46 attached to the tubular string 12 and the lines 46 attached to the junction 114 .
- the connection between the lines 46 attached to the tubular string 12 and the lines 46 attached to the junction 114 is made in the main wellbore 18 where it is most conveniently accessible in case of a malfunction.
- the lines 46 extending into the branch wellbore 22 do not require a “wet” connection in the branch wellbore or at the intersection 24 . Furthermore, it is not necessary for the connection 100 between the lines 46 attached to the tubular string 12 and the lines 46 attached to the junction 114 to be made in the wellbore 18 , since the junction 114 and the tubular strings 112 , 124 could be conveyed together into the well, instead of installing the junction and tubular strings 112 , 124 in the well prior to running in the tubular string 12 .
- junction 114 includes another passage 130 which provides access from the passage 126 to the passage 118 when a sleeve 132 is retrieved from, or shifted in, the junction.
- access to the lower main wellbore 52 is available via the tubular string 12 , the passage 126 , the tubular string 124 and the tubular string 98 .
- Access to the branch wellbore 22 may be obtained by retrieving or shifting the sleeve 132 and installing a deflector (not shown) in the passage 126 to deflect tools, equipment, etc. from the passage 126 , through the passage 130 into the passage 118 , and then through the tubular string 112 .
Abstract
Segregated deployment of downhole valves for monitoring and control of multilateral wells. In a described embodiment, a well completion system includes at least two tubular strings. One tubular string includes a flow control device and sensor controlling and monitoring fluid flow into the tubular string from a zone intersected by a wellbore. Another tubular string with another flow control device and sensor controls and monitors fluid flow into that tubular string from another zone intersected by another wellbore. The two wellbores intersect. Each of the flow control devices is positioned in a respective one of the wellbores and has at least one line connected to the flow control device. The lines are installed in the wellbores without interruptions in the lines and without requiring connections to be made in the lines downhole.
Description
- The present invention relates generally to operations performed and equipment utilized in conjunction with a subterranean well and, in an embodiment described herein, more particularly provides a well completion, system and method for controlling and monitoring fluid flow in multilateral wells.
- It is typical practice when controlling and/or monitoring production flow from a lateral or branch wellbore, and from a portion of a main or parent wellbore below an intersection between the main and branch wellbores, to use one or more flow control devices and/or sensors positioned in the main wellbore. Unfortunately, this means that a flow control device/sensor used to control/monitor production from the branch wellbore may be positioned a relatively large distance from a zone in which the production originates.
- Even a flow control device/sensor used to control/monitor production from a lower portion of the main wellbore may be positioned a relatively large distance from a zone in which the production originates, for example, when the flow control device/sensor is positioned above an intersection between the main and branch wellbores. Flow between a wellbore and a zone intersected by the wellbore is more conveniently and accurately monitored and controlled when a device used to monitor/control such flow is positioned in the wellbore in closer proximity to the zone.
- Lines, such as hydraulic, electric, fiber optic, etc. lines, which are used to remotely operate and communicate with the flow control devices and sensors may be attached to a tubing string on which the flow control devices and sensors are conveyed into a well. If flow control devices and sensors are to be positioned in branch wellbores as well as in the main wellbore, there exists a need to conveniently and reliably provide for the lines extending into the branch wellbore(s), without requiring interruptions (breaks or disconnections) in the lines or requiring lines to be “wet” connected while downhole.
- Therefore, it will be readily appreciated that there exists a need for improved well completions, systems and methods to address these problems and/or other problems in the art of completing multilateral wells. These improvements will also be useful in other applications.
- In carrying out the principles of the present invention, in accordance with an embodiment thereof, a well completion, completion system and method are provided which alleviate the above problems in the art.
- In one aspect of the invention, a well completion system is provided. The well completion system includes at least one line extending to a remote location and into at least first and second intersecting wellbores. The line is positioned in the first and second wellbores without making a connection in the line downhole.
- In another aspect of the invention, a well completion system includes two or more tubular strings. One of the tubular strings extends in a wellbore, and another tubular string extends in another wellbore intersecting the first wellbore. Lines are attached to the tubular strings. At least one of the lines extends with the first tubular string in the first wellbore, and at least one of the lines extends with the other tubular string in the other wellbore.
- In yet another aspect of the invention, a method of completing a well including intersecting wellbores is provided. The method includes the steps of: conveying at least one line into each of the wellbores; and performing the conveying step without making any connections in the line in the well.
- These and other features, advantages, benefits and objects of the present invention will become apparent to one of ordinary skill in the art upon careful consideration of the detailed description of representative embodiments of the invention hereinbelow and the accompanying drawings.
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FIG. 1 is a partially cross-sectional schematic view of an initial configuration of a well completion system embodying principles of the present invention; -
FIG. 2 is a partially cross-sectional view of a final configuration of the well completion system ofFIG. 1 ; -
FIG. 3 is a partially cross-sectional schematic view of an initial configuration of another well completion system embodying principles of the present invention; -
FIG. 4 is a partially cross-sectional view of a final configuration of the well completion system ofFIG. 3 ; -
FIG. 5 is a schematic partially cross-sectional view of a third well completion system embodying principles of the invention; and -
FIG. 6 is a schematic partially cross-sectional view of a fourth well completion system embodying principles of the invention. - Representatively illustrated in
FIG. 1 is a multilateralwell completion system 10 which embodies principles of the present invention. In the following description of thesystem 10 and other apparatus and methods described herein, directional terms, such as “above”, “below”, “upper”, “lower”, etc., are used for convenience in referring to the accompanying drawings. Additionally, it is to be understood that the various embodiments of the present invention described herein may be utilized in various orientations, such as inclined, inverted, horizontal, vertical, etc., and in various configurations, without departing from the principles of the present invention. - As depicted in
FIG. 1 , atubular string 12, such as a production tubing string, is being used to convey two othertubular strings main wellbore 18, Themain wellbore 18 may be lined with protective casing orliner 20, or any portion of the wellbore may be completed open hole, if desired. - Another branch or
lateral wellbore 22 intersects themain wellbore 18 at anintersection 24. Thebranch wellbore 22 may be lined with aliner 26, or any portion of the branch wellbore may be completed open hole, if desired. - A whipstock or
deflector 28 is positioned in themain wellbore 18 adjacent and just below theintersection 24. As used herein, the term “below” means relatively farther along a wellbore from the earth's surface. Conversely, the term “above” means relatively closer to the earth's surface along a wellbore. Thus, the terms “above” and “below” may accurately describe a relative position in a wellbore, even if the wellbore is horizontal. - The
deflector 28 may have been used to drill thebranch wellbore 22, or it may have been positioned in themain wellbore 18 after drilling the branch wellbore. Thedeflector 28 includes abore 30 extending longitudinally therethrough. An upperinclined surface 32 of thedeflector 28 is oriented so that it faces toward thebranch wellbore 22. - An
assembly 34 is positioned in themain wellbore 18 below thedeflector 28, and asimilar assembly 36 is positioned in thebranch wellbore 22. Each of theassemblies seal bore 38 attached to, or otherwise associated with, a sealing andanchoring device 40, such as a packer or liner hanger, etc. - Each of the
tubular strings sealing device 42, such as seals, packing, etc., for sealing engagement in a respective one of theseal bores 38. Alternatively, thesealing device 42 on thetubular string 16 could sealingly engage thebore 30 of thedeflector 28. Any manner or location of sealing engagement between thetubular strings wellbores - Also included in each of the
tubular strings flow control device 44, such as a valve or choke, etc., and asensor 58. Preferably, theflow control devices 44 are remotely controlled, for example, via one ormore lines 46 extending to a remote location, such as the earth's surface or another position in the well. Thesensors 58 also communicate with the remote location via thelines 46. - The
lines 46 may be hydraulic, electric, fiber optic, or another type of line. Alternatively, or in addition, theflow control devices 44 and/orsensors 58 may be controlled and/or monitored remotely via telemetry without use of thelines 46. For example, theflow control devices 44 andsensors 58 could be controlled and/or monitored remotely using acoustic, pressure pulse, electromagnetic, or any other type of telemetry. - The
flow control devices 44 may be Interval Control Valves commercially available from WellDynamics, Inc. of Spring, Tex. These Interval Control Valves not only control flow between a tubular string and a zone intersected by a wellbore, they may also include the ability to monitor certain well parameters. For example, an optical fiber in one of thelines 46 connected to theflow control devices 44 may be used in distributed temperature sensing. - If desired, the relative longitudinal positions of the
flow control devices 44 andsealing devices 42 as depicted inFIG. 1 may be reversed in thetubular strings flow control devices 44 may control flow through a longitudinal passage formed through each device, or through a sidewall of each device, in keeping with the principles of the invention. - The
sensors 58 may include pressure, temperature, flow rate, resistivity, fluid identification, water cut, or any other type of sensors. As with theflow control devices 44, the relative position of thesensors 58 in thetubular strings sensors 58 may be positioned internal or external to thetubular strings - A
junction 48 is provided between thetubular strings junction 48, each of thetubular strings tubular strings - The
tubular string 14 includes abull nose 50 at a lower end thereof, in order to deflect the tubular string into thebranch wellbore 22. That is, thedeflector 28 is configured so that it is selective, deflecting thetubular string 14 off of thesurface 32 into the branch wellbore 22, but permitting thetubular string 16 to pass through thebore 30 and into alower portion 52 of themain wellbore 18. For example, thebull nose 50 may have a larger outer diameter than an inner diameter of thebore 30, the bull nose may be shaped in a manner otherwise preventing it from passing into the bore, etc. - Alternatively, the
tubular string 16 could be longer than thetubular string 14, so that thetubular string 16 enters thebore 30 first. Then, as thetubular string 12 is lowered further, the presence of thetubular string 16 in thebore 30 prevents thetubular string 14 from entering the bore, and so thetubular string 14 is deflected by thesurface 32 into thebranch wellbore 22. An illustration of this alternative is provided inFIGS. 3 & 4 , and is described in further detail below. - Referring additionally now to
FIG. 2 , thesystem 10 is representatively illustrated in a configuration in which thetubular string 14 has been deflected into the branch wellbore 22, and thetubular string 16 has passed through thebore 30 into thelower portion 52 of themain wellbore 18. The sealingdevices 42 on thetubular strings respective bores 38 of theassemblies 36 in the branch wellbore 22 and in thelower portion 52 of themain wellbore 18. Alternatively, the sealingdevices 42 could sealingly engage other structures in thewellbores casing 18 andliner 26, without use of theassemblies - The
flow control devices 44 on thetubular strings lower portion 52 of themain wellbore 18. Theflow control device 44 on thetubular string 14 may now be used to control flow (production or injection) between the tubular string and a formation orzone 54 intersected by the branch wellbore 22, and the flow control device on thetubular string 16 may now be used to control flow (production or injection) between thetubular string 16 and a formation orzone 56 intersected by thelower portion 52 of themain wellbore 18. Note that thezones tubular strings - Note that the
flow control devices 44 are positioned in close proximity to therespective zones sensors 58 is also performed in close proximity to thezones flow control devices 44 and monitor thesensors 58 via thelines 46, coupled with the enhanced accuracy provided by the positioning of the flow control devices and sensors, permits precise control and monitoring of production and/or injection operations in the well. - Furthermore, note that the
lines 46 attached to thetubular strings lines 46 continue to be operably connected to theflow control devices 44 andsensors 58, and extend unbroken to the remote location, during the installation of the tubular strings. - Referring additionally now to
FIG. 3 , another multilateralwell completion system 60 is representatively illustrated. Thesystem 60 is similar in many respects to thesystem 10 described above, and so elements of thesystem 60 which are similar to elements of thesystem 10 described above are indicated inFIG. 3 using the same reference numbers. - As depicted in
FIG. 3 , thetubular strings parent wellbore 18, similar to thesystem 10 as shown inFIG. 1 . However, another branch wellbore 62 intersects themain wellbore 18 at anintersection 64. Adeflector 66 has been positioned just below theintersection 64, and has been oriented so that an upperinclined deflection surface 68 faces toward thebranch wellbore 62. - The
deflector 66 has abore 70 extending therethrough which is large enough for thetubular strings tubular strings main wellbore 18, thetubular strings bore 70 and pass through thedeflector 66. - Referring additionally now to
FIG. 4 , thesystem 60 is depicted in a configuration in which thetubular strings deflector 66. Further conveyance of thetubular strings main wellbore 18 causes thetubular string 14 to deflect off of thedeflector surface 32 and into the branch wellbore 22, as described above for thesystem 10. Still further conveyance of thetubular strings main wellbore 18 causes thetubular string 16 to enter thebore 30 of thedeflector 28, also as described above for thesystem 10. - Another
tubular string 72 is connected to thetubular string 12 by means of anotherjunction 48. Thetubular string 72 is similar to thetubular string 14, in that it includes a sealingdevice 42, aflow control device 44 and asensor 58. Thelines 46 extend to theflow control device 44 andsensor 58 on thetubular string 72. - The
junction 48 provides communication between thetubular strings tubular string 74 connected thereabove and extending to a remote location. Thetubular string 74 is, thus, used to convey the othertubular strings main wellbore 18. - As the
tubular string 74 conveys the othertubular strings main wellbore 18, thetubular strings deflector 66, as described above. Thetubular string 12 also enters thebore 70 of thedeflector 66 after thelower junction 48 enters thebore 70. Thus, when the lower end of thetubular string 72 reaches thedeflector 66, thetubular string 12 is already in thebore 70. - The
tubular string 72 includes abull plug 76 or other device at its lower end which prevents thetubular string 72 from entering thebore 70 while thetubular string 12 is in the bore. For example, thebull plug 76 may be sized or otherwise configured so that it cannot fit into thebore 70 while thetubular string 12 is in the bore. Instead, thetubular string 72 is deflected by thesurface 68 into thebranch wellbore 62. - The
tubular string 72 may be deflected into the branch wellbore 62 at about the same time as thetubular string 14 is deflected into thebranch wellbore 22. Of course, depending upon the relative lengths of thetubular strings deflectors tubular string 72 may be deflected into the branch wellbore 62 before or after thetubular string 14 is deflected into thebranch wellbore 22. - With the
tubular strings FIG. 4 , the sealingdevices 42 are set or otherwise sealingly engaged in therespective wellbores FIG. 4 , the sealingdevice 42 on thetubular string 14 is sealingly engaged with theliner 26, the sealingdevice 42 on thetubular string 16 is sealingly engaged in thebore 30, the sealingdevice 42 on thetubular string 72 is sealingly engaged in aliner 78 in the branch wellbore 62, and asealing device 42 on thetubular string 12 is sealingly engaged in thebore 70. Of course, the sealingdevices 42 may be otherwise positioned in thewellbores - In a producing well, the
flow control device 44 on thetubular string 14 can now control fluid flow from thezone 54, theflow control device 44 on thetubular string 16 can now control flow from thezone 56, and theflow control device 44 on thetubular string 72 can now control fluid flow from a formation orzone 80 intersected by thewellbore 62. Thesensors 58 can be used to monitor these respective fluid flows, or to detect other parameters in the well. - The
lower junction 48 commingles the flows from thetubular strings tubular string 12. Theupper junction 48 commingles the flows from thetubular strings tubular string 74 for production to the surface. For an injection well, these flow directions may be reversed. - Note that, in the
system 60, thelines 46 are extended intomultiple branch wellbores main wellbore 18. This positioning of thelines 46 is accomplished in thesystem 60 without interruptions in the lines and without requiring any “wet” connections between lines downhole. Instead, thelines 46 extend continuously from thesensors 58 andflow control devices 44 to the remote location. This enhances the reliability and performance of thelines 46, while reducing the complexity of the completion operation. - In
FIG. 4 , thelines 46 extend through the sealingdevice 42 on thetubular string 12. This configuration may be accomplished at the surface using “dry” connections (i.e., connections made between lines while at the surface) at upper and lower ends of the sealingdevice 42, without compromising the reliability or performance of the lines when installed. - Although only two
branch wellbores FIGS. 3 & 4 , it will be readily appreciated that any increased number of branch wellbores may be provided for by increasing the number of tubular strings deflected into the respective branch wellbores, and increasing the number of deflectors, junctions, flow control devices, sensors, etc., as needed. Thelines 46 can extend into any number of branch wellbores to any number of flow control devices, sensors, etc., without interruptions in the lines and without requiring any “wet” connections between lines downhole. - Referring additionally now to
FIG. 5 , another well completion system go is representatively illustrated. The system go is similar in many respects to thesystems systems FIG. 5 using the same reference numbers. - As depicted in
FIG. 5 , atubular string 92 is deflected off of theinclined surface 32 of thedeflector 28 and into thebranch wellbore 22. Thetubular string 92 is connected to anothertubular string 94 via a junction orwye block 96. Thewye block 96 permits access to each of thetubular strings - The
tubular string 94 is sealingly engaged in thebore 30 of thedeflector 28. Attached below thedeflector 28 is anothertubular string 98 positioned in thelower portion 52 of themain wellbore 18. Thetubular string 98 is installed with thedeflector 28 and anchoringdevice 40 prior to conveying thetubular strings tubular string 12. - The
tubular string 98 has theflow control device 44,lines 46 andsensor 58 interconnected therein when it is installed. In order to connect thelines 46 on thetubular string 98 to thelines 46 on thetubular string 94, a “wet”connection 100 is made when thetubular string 94 is engaged with thedeflector 28. For example, one connector may be attached to thedeflector 28 and operably coupled to thelines 46 on thetubular string 98, while another connector may be attached to thetubular string 94 and operably coupled to the lines on thetubular string 94. When thetubular string 94 is inserted into thebore 30, the connectors mate to form theconnection 100. - Although the system go does include the “wet”
connection 100, it is positioned in themain wellbore 18 where it is more conveniently accessible in the event of a malfunction. Note that thelines 46 on thetubular string 92 extending into the branch wellbore 22 extend continuously from theflow control device 44 andsensor 58 to the remote location, without requiring any “wet” connections to be made downhole. - Referring additionally now to
FIG. 6 , anotherwell completion system 110 is representatively illustrated. Thesystem 110 is similar in many respects to thesystems system 110 which are similar to elements of thesystems FIG. 6 using the same reference numbers. - As depicted in
FIG. 6 , atubular string 112 is deflected off of theinclined surface 32 of thedeflector 28 and into thebranch wellbore 22. The sealingdevice 42 carried on a lower end of thetubular string 112 sealingly engages theassembly 36 previously positioned in the branch wellbore 22, for example, by sealingly engaging theanchoring device 40. - An upper end of the
tubular string 112 remains in themain wellbore 18 and is connected to ajunction 114 secured in the main wellbore by ananchoring device 116, such as a packer. Thejunction 114 has aninner passage 118 which provides fluid communication between thetubular string 112 and anannulus 120 formed between thetubular string 12 and themain wellbore 18 above the junction. Anopening 122 in thetubular string 12 permits fluid communication between theannulus 120 and the interior of the tubular string. - Another
tubular string 124 extends downwardly from thejunction 114 and is sealingly engaged in thebore 30 of thedeflector 28. Similar to thesystem 90 depicted inFIG. 5 , thetubular string 98 is connected below thedeflector 28 and is installed in themain wellbore 18 prior to running thejunction 114 andtubular strings connection 100 is made between thelines 46 connected to thetubular string 98 and the lines connected to thetubular string 124 when thetubular string 124 engages thedeflector 28. - The
tubular string 124 is in fluid communication with anotherpassage 126 formed through thejunction 114. Thepassage 126 is, in turn, in fluid communication with thetubular string 12. Thus, fluids from thetubular strings tubular string 12. Thetubular string 12 is sealingly engaged with thejunction 114 by means ofseals 128 carried on the tubular string, which are inserted into thepassage 126, or into a seal bore at an upper end of the passage. - When the
tubular string 12 engages thejunction 114, another “wet”connection 100 is formed between thelines 46 attached to thetubular string 12 and thelines 46 attached to thejunction 114. As with theconnection 100 between thelines 46 attached to thetubular string 124 and thelines 46 attached to thedeflector 28, the connection between thelines 46 attached to thetubular string 12 and thelines 46 attached to thejunction 114 is made in themain wellbore 18 where it is most conveniently accessible in case of a malfunction. - Note that the
lines 46 extending into the branch wellbore 22 do not require a “wet” connection in the branch wellbore or at theintersection 24. Furthermore, it is not necessary for theconnection 100 between thelines 46 attached to thetubular string 12 and thelines 46 attached to thejunction 114 to be made in thewellbore 18, since thejunction 114 and thetubular strings tubular strings tubular string 12. - One advantage to using the
junction 114 is that it includes anotherpassage 130 which provides access from thepassage 126 to thepassage 118 when asleeve 132 is retrieved from, or shifted in, the junction. As depicted inFIG. 6 , access to the lowermain wellbore 52 is available via thetubular string 12, thepassage 126, thetubular string 124 and thetubular string 98. Access to the branch wellbore 22 may be obtained by retrieving or shifting thesleeve 132 and installing a deflector (not shown) in thepassage 126 to deflect tools, equipment, etc. from thepassage 126, through thepassage 130 into thepassage 118, and then through thetubular string 112. - Of course, a person skilled in the art would, upon a careful consideration of the above description of representative embodiments of the invention, readily appreciate that many modifications, additions, substitutions, deletions, and other changes may be made to these specific embodiments, and such changes are contemplated by the principles of the present invention. Accordingly, the foregoing detailed description is to be clearly understood as being given by way of illustration and example only, the spirit and scope of the present invention being limited solely by the appended claims and their equivalents.
Claims (34)
1. A well completion system comprising:
at least one line extending to a remote location and into at least first and second intersecting wellbores, the at least one line being positioned in the first and second wellbores without making a connection in the line downhole.
2. The system according to claim 1 , wherein there are multiple lines, a first at least one of the lines being attached to a first tubular string positioned in the first wellbore, and a second at least one of the lines being attached to a second tubular string positioned in the second wellbore.
3. The system according to claim 2 , wherein the first tubular string provides access to the first wellbore below an intersection between the first and second wellbores, and wherein the second tubular string provides access to the second wellbore from the first wellbore above the intersection.
4. The system according to claim 2 , wherein the first line is connected to a first sensor of the first tubular string, and wherein the second line is connected to a second sensor of the second tubular string.
5. The system according to claim 2 , wherein the first line is connected to a first flow control device of the first tubular string, and wherein the second line is connected to a second flow control device of the second tubular string.
6. The system according to claim 5 , wherein the first flow control device is positioned in the first wellbore below an intersection between the first and second wellbores, and wherein the second flow control device is positioned in the second wellbore.
7. The system according to claim 1 , wherein the line is positioned in the first and second wellbores without any interruptions in the line.
8. The system according to claim 1 , wherein the line further extends into a third wellbore which intersects the first wellbore, without making a connection in the line downhole.
9. The system according to claim 8 , wherein the line is positioned in the first, second and third wellbores without any interruptions in the line.
10. The system according to claim 1 , wherein the line is attached to a first tubular string extending into a deflector positioned in the first wellbore.
11. The system according to claim 10 , wherein there are multiple lines, and wherein at least one of the lines is attached to a second tubular string deflected by the deflector into the second wellbore.
12. The system according to claim 11 , wherein the first tubular string is positioned in the deflector when the second tubular string is deflected by the deflector into the second wellbore.
13. A well completion system, comprising:
first and second tubular strings, the first tubular string extending in a first wellbore, and the second tubular string extending in a second wellbore intersecting the first wellbore; and
lines attached to each of the first and second tubular strings, at least one of the lines extending with the first tubular string in the first wellbore, and at least one of the lines extending with the second tubular string in the second wellbore.
14. The system according to claim 13 , wherein at least one of the lines extends between a remote location and a first flow control device interconnected in the first tubular string and positioned in the first wellbore.
15. The system according to claim 14 , wherein at least one of the lines extends between the remote location and a second flow control device interconnected in the second tubular string and positioned in the second wellbore.
16. The system according to claim 13 , wherein at least one of the lines extends between a remote location and a first sensor interconnected in the first tubular string and positioned in the first wellbore.
17. The system according to claim 16 , wherein at least one of the lines extends between the remote location and a second sensor interconnected in the second tubular string and positioned in the second wellbore.
18. The system according to claim 13 , further comprising a deflector positioned in the first wellbore, and wherein the first tubular string and at least one of the lines extend through the deflector.
19. The system according to claim 18 , wherein the deflector deflects the second tubular string from the first wellbore into the second wellbore.
20. The system according to claim 13 , wherein a third tubular string extends in a third wellbore intersecting the first wellbore, and wherein at least one of the lines extends with the third tubular string in the third wellbore.
21. The system according to claim 13 , wherein the lines are positioned in the first and second wellbores without making a connection in the line downhole.
22. The system according to claim 13 , wherein the lines are positioned in the first and second wellbores without any interruptions in the lines.
23. The system according to claim 13 , wherein a connection is made in the first wellbore in the lines extending with the first tubular string.
24. The system according to claim 13 , wherein a connection is made in the first wellbore in the lines extending with the second tubular string.
25. The system according to claim 13 , wherein the first tubular string provides access to the first wellbore below an intersection between the first and second wellbores.
26. The system according to claim 13 , wherein the second tubular string provides access to the second wellbore below an intersection between the first and second wellbores.
27. A method of completing a well including intersecting first and second wellbores, the method comprising the steps of:
conveying at least one line into the first and second wellbores; and
performing the conveying step without making any connections in the line in the well.
28. The method according to claim 27 , wherein the conveying step further comprises conveying each of first and second tubular strings into a respective one of the first and second wellbores.
29. The method according to claim 28 , further comprising the step of interconnecting a first line to a first flow control device in the first tubular string, and wherein the conveying step further comprises positioning the first flow control device in the first wellbore.
30. The method according to claim 29 , further comprising the step of interconnecting a second line to a second flow control device in the second tubular string, and wherein the conveying step further comprises positioning the second flow control device in the second wellbore.
31. The method according to claim 28 , further comprising the step of interconnecting a first line to a first sensor in the first tubular string, and wherein the conveying step further comprises positioning the first sensor in the first wellbore.
32. The method according to claim 31 , further comprising the step of interconnecting a second line to a second sensor in the second tubular string, and wherein the conveying step further comprises positioning the second sensor in the second wellbore.
33. The method according to claim 28 , wherein the conveying step further comprises passing the first tubular string through a deflector bore.
34. The method according to claim 27 , wherein the conveying step further comprises conveying the at least one line into a third wellbore intersecting the first wellbore.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US10/730,470 US20050121190A1 (en) | 2003-12-08 | 2003-12-08 | Segregated deployment of downhole valves for monitoring and control of multilateral wells |
NO20045269A NO20045269L (en) | 2003-12-08 | 2004-12-01 | Isolated deployment of downhole valves for monitoring and control of multi-lateral wells |
BR0405464-4A BRPI0405464A (en) | 2003-12-08 | 2004-12-02 | System and method of segregated underground bore valve installation for multilateral well monitoring and control |
GB0426817A GB2408988A (en) | 2003-12-08 | 2004-12-07 | Control lines without wet connection |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/730,470 US20050121190A1 (en) | 2003-12-08 | 2003-12-08 | Segregated deployment of downhole valves for monitoring and control of multilateral wells |
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US20050121190A1 true US20050121190A1 (en) | 2005-06-09 |
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US10/730,470 Abandoned US20050121190A1 (en) | 2003-12-08 | 2003-12-08 | Segregated deployment of downhole valves for monitoring and control of multilateral wells |
Country Status (4)
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US (1) | US20050121190A1 (en) |
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GB (1) | GB2408988A (en) |
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US11326423B2 (en) * | 2019-05-16 | 2022-05-10 | Saudi Arabian Oil Company | Automated production optimization technique for smart well completions using real-time nodal analysis including recommending changes to downhole settings |
US11441395B2 (en) | 2019-05-16 | 2022-09-13 | Saudi Arabian Oil Company | Automated production optimization technique for smart well completions using real-time nodal analysis including real-time modeling |
US11499423B2 (en) | 2019-05-16 | 2022-11-15 | Saudi Arabian Oil Company | Automated production optimization technique for smart well completions using real-time nodal analysis including comingled production calibration |
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US11326423B2 (en) * | 2019-05-16 | 2022-05-10 | Saudi Arabian Oil Company | Automated production optimization technique for smart well completions using real-time nodal analysis including recommending changes to downhole settings |
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USD975107S1 (en) | 2019-05-16 | 2023-01-10 | Saudi Arabian Oil Company | Portion of a display screen with graphical user interface |
US11821289B2 (en) | 2019-11-18 | 2023-11-21 | Saudi Arabian Oil Company | Automated production optimization technique for smart well completions using real-time nodal analysis |
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Also Published As
Publication number | Publication date |
---|---|
GB0426817D0 (en) | 2005-01-12 |
GB2408988A (en) | 2005-06-15 |
NO20045269L (en) | 2005-06-09 |
BRPI0405464A (en) | 2005-09-20 |
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