US20190323325A1 - A flow base system for subsea wells - Google Patents

A flow base system for subsea wells Download PDF

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Publication number
US20190323325A1
US20190323325A1 US16/472,580 US201716472580A US2019323325A1 US 20190323325 A1 US20190323325 A1 US 20190323325A1 US 201716472580 A US201716472580 A US 201716472580A US 2019323325 A1 US2019323325 A1 US 2019323325A1
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US
United States
Prior art keywords
flow base
base system
flow
header pipe
well
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US16/472,580
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English (en)
Inventor
Steinar Lindermann HESTETUN
Kare TOLO
Craig Wilson JOHNSTONE
Paul William WHITE
Mohammad Hasan ALI
Tor Alexander FJELDLY
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vetco Gray Scandinavia AS
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Vetco Gray Scandinavia AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Vetco Gray Scandinavia AS filed Critical Vetco Gray Scandinavia AS
Publication of US20190323325A1 publication Critical patent/US20190323325A1/en
Assigned to VETCO GRAY SCANDINAVIA AS reassignment VETCO GRAY SCANDINAVIA AS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JOHNSTONE, Craig Wilson, Ali, Mohammed Hasan, WHITE, PAUL WILLIAM, FJELDLY, TOR ALEXANDER, HESTETUN, Steinar Lindermann, TOLO, Kare
Abandoned legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK 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
    • E21B41/04—Manipulators for underwater operations, e.g. temporarily connected to well heads
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK 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
    • E21B41/08—Underwater guide bases, e.g. drilling templates; Levelling thereof
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
    • E21B43/017—Production satellite stations, i.e. underwater installations comprising a plurality of satellite well heads connected to a central station

Definitions

  • the present invention relates to a flow base system for subsea wells.
  • the infrastructure of subsea hydrocarbon production fields typically comprises rigid and flexible piping and manifolds to collect production fluid from subsea wells.
  • Subsea wells can be grouped in template solution, or spread out as standalone satellite wells regularly/irregularly distributed over the field. If wells can be grouped closely together, templates can be used for controlling the spacing between the wells.
  • template wells subsea wells which are closely grouped and guided in a template will be named template wells.
  • a template is a structure which is placed on the seabed to provide guidance and support for other equipment such as drilling and completion equipment, wellheads, Christmas trees (XT), manifolds and pipeline connection equipment.
  • equipment such as drilling and completion equipment, wellheads, Christmas trees (XT), manifolds and pipeline connection equipment.
  • a production well template is a welded structure that supports manifold piping and valves for production fluid from wells which are grouped together at a single seabed location.
  • the number of wells is limited by the size of the well template, which has an individual section or slot for each well connected to the template. Typical sizes include 2, 4, 6 and 8 slot configurations.
  • Template installation typically includes landing of a prefabricated piping deck onto the template.
  • the piping deck typically includes the flowlines and valves necessary to conduct production fluid from the template, as well as the hydraulic lines required to operate the manifold and XT valves. Since maintenance and repairs on deep water equipment requires implementation of ROV-assisted structures, the piping deck, e.g., may be separately retrievable in order to avoid dismantling of the entire production system in case of damage to the piping components.
  • the production structures may be situated in fishery zones, with e.g. trawlers towing trawls on the seabed.
  • trawlers towing trawls on the seabed.
  • the presented flow base system seeks to meet this challenge by arranging production modules that are normally spread out on the seabed into one compact structure.
  • Still other objects include the provision of a versatile flow base system which permits implementation of, e.g., pigging modules and well intervention systems.
  • a flow base system for subsea wells comprising a header pipe for production fluid extended through the flow base system, wherein from opposite sides of the header pipe a set of flow base modules, respectively, is connected for supply of production fluid to the header pipe via individual branch pipes connecting the header pipe with a coupling interface arranged for vertical connection to a Christmas tree (XT) respectively.
  • the flow base system is installed in a frame structure similar to a well template structure, such that a flow base module respectively is inserted into the well slots formed in the frame structure.
  • This flow base system permits protection of the flow base components under a common top cover for the frame structure.
  • This embodiment is also a compact and cost saving solution which combines one singular protection structure with a non-complex piping and instrumentation diagram (P&ID).
  • a flow base system for subsea wells comprises a template structure with a header pipe and a number of flow base structures, each flow base structure comprising a XT interface connectable to a XT and wellhead, a set of flow base structures being arranged on each side of the header pipe, each flow base structure being connected to the header pipe via individual branch pipes, the flow base structures being fixed to the well template structure.
  • the piping of the flow base system is fixed to the template structure.
  • the piping of the flow base system can also be partly fixed to the flow base structures.
  • all valves of the system are removable.
  • the flow base system comprises two or more header pipes.
  • flow base structures facilitates extensive use of standard components in a streamlined building process. This benefits to reduced time for installation and testing and thereby cost savings.
  • the described design also facilitates upscaling or downscaling of the system.
  • each flow base structure comprises a well insert in fixed relation to guiding means arranged for guidance of an XT during landing and installation.
  • the guiding means is realized as guide posts or pillars or as funnel-equipped tubes rising from a flow base support, in which the branch pipes and valves as well as XT interfaces are supported.
  • a singular isolation valve on each branch pipe is controllable for opening the branch pipe for flow of production fluid into the at least one header pipe.
  • coupling means is arranged in one end of the at least one header pipe for connecting to external subsea equipment.
  • the arrangement of coupling means at one end of the header pipe or pipes makes it possible to extend the subsea field through the flow base system. This significantly improves the flexibility in the layout of a subsea field using the described flow base system. By connecting a further production line to the flow base system, a production flow can flow through the flow base system.
  • the coupling means can also be used for coupling of a pig launcher/receiver to the flow base system.
  • an isolation valve in the same end of the header pipe is controllable for through flow of production fluid from connected external equipment.
  • coupling means provides the ability for tying-in standalone satellite wells or interconnected (daisy-chain) wells, and permits connection of another flow base system if appropriate.
  • the embodiment also provides the ability of connecting a pig launcher or receiver in the said end of the header pipe.
  • the flow base modules are essentially identical and the flow base modules on one side of the header pipe are turned 180° in relation to the orientation of the flow base modules on the other side of the header pipe.
  • the flow base modules on a first side of the header pipe may be mirrored layouts of the flow base modules on a second side of the header pipe.
  • the first and second sides of the header pipe can advantageously be opposite sides of the header pipe. The advantage of standardization through the repeated use of identical components can still be enjoyed.
  • Operational control is distributed within the flow base system from an umbilical termination assembly (UTA) associated with the flow base system.
  • UTA umbilical termination assembly
  • This embodiment avoids control tubing since flying leads or cables can be used for distribution of hydraulic fluid and/or electrical power.
  • XT control within the flow base system is distributed from the UTA via hydraulic and electric flying leads/cables.
  • a valve control interface is installed for intervention by a remotely operated vehicle (ROV) or a diver. This feature can provide redundancy in case other operational control fails.
  • ROV remotely operated vehicle
  • the XT control in the system can be distributed within the flow base system from an umbilical termination assembly associated with the flow base system.
  • the XT control can be distributed from the umbilical termination assembly via hydraulic and/or electric flying leads.
  • a well intervention system is installed essentially in parallel with the production fluid pipework.
  • the well intervention system comprises at least one header pipe with branch pipes extended to each flow base structure respectively.
  • the fluid of the well intervention system can be supplied via an umbilical to an umbilical termination assembly associated with the flow base system.
  • the umbilical termination assembly (UTA) can be coupled directly to the XTs on each flow base structure.
  • the well intervention system allows for supply of gas for enhanced lift of production fluid, or for supply of injection chemicals to the well.
  • the flow base module may thus each comprise two vertical connection systems for the production fluid and for gas lift/chemicals respectively.
  • Each flow base module of the flow base system comprises a well insert in fixed relation to guiding means arranged for guidance of an XT during landing and installation.
  • the guiding means can be realized as guide posts/pillars or as funnel-equipped tubes rising from a flow base support, in which the branch pipes and valves as well as the XT interfaces are supported.
  • the flow base structure may comprise an extension for connecting to an external supply of production fluid via a jumper pipe. This configuration extends substantially the possibility of tying-in external singular or daisy-chain wells in an existing production field architecture.
  • FIG. 1 is a schematic view illustrating the flow base system.
  • FIG. 2 is a first perspective view of a subsea well template in which the flow base system is integrated.
  • FIG. 3 is a second perspective view of the subsea well template in which the flow base system is integrated
  • FIG. 4 is a partially broken away perspective view corresponding to FIG. 2 , showing details of the flow base system installed in the subsea well template.
  • a flow base system 1 comprises a set of flow base modules 2 arranged on opposite sides of a header pipe 3 for production fluid.
  • the header pipe 3 extends through the flow base system from a first or upstream end 4 to a second or downstream end 5 as seen in the direction of flow F through the header pipe.
  • the first end 4 is optionally connectable to external equipment for transport via the header pipe 3 .
  • the second end is the discharge end from which production fluid is discharged downstream.
  • a header isolation valve 6 is arranged in the first end of the header pipe, which also in the same end carries coupling means 7 for connecting to an external supplier of production fluid or to other subsea equipment.
  • These external units can be another flow base system, a standalone satellite well or interconnected daisy-chain wells, or a pigging launcher/receiver e.g.
  • the header pipe carries coupling means 8 , such as a flange coupling e.g., arranged for connecting the flow base system to a pipeline, a jumper pipe or to other downstream equipment for fluid transport.
  • the header pipe 3 further comprises a number of pipe joints 9 , especially T-couplings 9 through which the flow base modules 2 are connected to the header pipe 3 at mutually spaced locations along the header pipe.
  • Each flow base module 2 comprises a branch pipe 10 connecting the header pipe with an XT tree interface 11 .
  • An isolation valve 12 on the branch pipe is controllable for opening the branch pipe for flow of production fluid into the header pipe.
  • the isolation valves 6 and 12 are on/off valves, and can be realized as gate valves e.g.
  • the isolation valves 6 , 12 are releasably connected to the pipe joints or T-branches 9 and branch pipes 10 . If necessary, the isolation valves 6 , 12 can be removed and replaced.
  • the piping of the flow base system and surrounding structures is permanent and will not be removable. This is possible, since all valves are retrievable.
  • the XT interface 11 is supported on a flow base support 13 which also carries a well insert 14 in fixed relation to an array of guides 15 , the guides 15 are arranged for guidance of an XT when lowered to the flow base module during installation.
  • the XT interface 11 faces upwards for vertical or upright connection to the XT.
  • the XT itself is not part of the invention and is omitted from the drawings for reasons of clarity.
  • the flow base modules 2 on one side of the header pipe 3 are turned horizontally through 180° in relation to the orientation of the flow base modules 2 on the other side of the header pipe 3 .
  • the flow base module is supplementary equipped with an extension and on/off valve for tying-in an external well and supplier of production fluid.
  • a satellite well can e.g. be connected directly to the XT interface 11 , if appropriate.
  • the flow base system 1 is integrated in a frame structure 18 arranged to be lowered for connecting with a foundation (not shown) that is anchored in the seabed.
  • the frame structure 18 comprises two side-bays 19 and 20 interconnected through a mid-section 21 .
  • Guide funnels 22 in the ends of the side-bays provide guidance for mating with the foundation, particularly in case piling is required for anchoring of the frame structure 18 .
  • Each side bay 19 , 20 is a rectangular structure composed of longitudinal beams 23 and transverse beams 24 .
  • the beams 23 and 24 define the individual slots S 1 -S 4 , which are four in the shown embodiment, and in which a flow base module 2 , respectively, is arranged to ensure that the well insert 14 is placed in register with a corresponding well.
  • the branch pipes 10 In mounted position the branch pipes 10 reach into the mid-section for connecting with the header pipe 3 , which is suspended in the mid-section 21 to extend substantially through the frame structure 18 .
  • the frame structure 18 is essentially similar to a production well template and can be referred to as such.
  • the flow base system 1 is protected under a top cover 25 which is supported by a superstructure comprising horizontal or lying beams 26 and vertical or upright struts 27 .
  • the top cover 25 comprises hatches 28 respectively which are installed above each slot after installation of the XTs.
  • the flow base components in the mid-section 21 are covered and protected below a portion of the top cover comprising a valve control interface 29 .
  • the valve control interface 29 is supported by a separate superstructure 30 , this way building an integrated part of the top cover 25 .
  • the valve control interface 29 comprises handles and connections 31 for manual control of the valves of the flow base system by means of an ROV or a diver.
  • XTs are monitored and controlled from topside management via an umbilical 32 connecting to the XTs via an umbilical termination assembly (UTA) 33 .
  • the UTA 33 distributes the control of the XTs via hydraulic and electric flying leads/cables.
  • the UTA 33 further distributes well intervention fluid via a well intervention pipework 35 .
  • the well intervention pipework 35 comprises a header pipe 36 from which a branch pipe 37 respectively extends to each flow base module 2 for termination in a second XT interface 38 , likewise arranged for connection to the XT. In the shown embodiment, there is a vertical or upright connection to the XT. Isolation valves 39 on the branch pipes 37 are controllable for regulating the supply of well intervention fluid to the wells.
  • the well intervention pipework 35 can be used for supply of all kinds of well intervention fluid as is commonly known in the art and used in hydrocarbon production from subsea wells, such as gas for enhanced lift of the production fluid, injection water, or chemical products for wax and hydrate prevention, etc.
  • An isolation valve 40 may be arranged in the downstream end of the header pipe 36 to permit supply of injection water to the well intervention pipework from external source, such as from a subsea water well, if appropriate.
  • the flow base system as disclosed provides a compact, cost-effective and fabrication friendly solution.
  • the main features of the flow base modules i.e. the flow base support, XT interfaces and pipework, permits the use of a standard satellite XT into a template system. In other words, the same XT can be used both as satellite and template XT.
  • the system also permits connecting a step-out well from a well slot in case that is required.
  • the tolerance loop between the manifold piping and XT is significantly simplified by the present flow base system since the pipework can be non-retrievable. Thus, no fabrication jigs or precision welding will be required, all tolerances can be taken care of by machining of a limited number of components in the XT flow base.
  • the present flow base system uses diver replaceable valves instead of fully retrievable manifold modules.
  • the pipework is simplified as all control tubing is removed and replaced by hydraulic flying leads (HFL) and electric flying leads (EFL) which are connected directly from UTA, or via a subsea distribution unit (SDU) if appropriate.
  • HFL hydraulic flying leads
  • ETL electric flying leads
  • SDU subsea distribution unit

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Pipeline Systems (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
US16/472,580 2016-12-22 2017-12-21 A flow base system for subsea wells Abandoned US20190323325A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NO20162048A NO344888B1 (en) 2016-12-22 2016-12-22 A flow base system for subsea wells
NO20162048 2016-12-22
PCT/EP2017/084213 WO2018115347A1 (fr) 2016-12-22 2017-12-21 Système de base d'écoulement pour puits sous-marins

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US20190323325A1 true US20190323325A1 (en) 2019-10-24

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US16/472,580 Abandoned US20190323325A1 (en) 2016-12-22 2017-12-21 A flow base system for subsea wells

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US (1) US20190323325A1 (fr)
EP (1) EP3559402B1 (fr)
AU (1) AU2017381942B2 (fr)
NO (1) NO344888B1 (fr)
WO (1) WO2018115347A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2593464A (en) * 2020-03-23 2021-09-29 Aker Solutions As Modular subsea manifold system
US11346185B2 (en) * 2018-01-04 2022-05-31 Subsea 7 Norway As Integrating wells in towable subsea units
NO20210289A1 (en) * 2021-03-04 2022-09-05 Horisont Energi As Subsea Template for Injecting Fluid for Long Term Storage in a Subterranean Void and Method of Controlling a Subsea Template
US20220403715A1 (en) * 2019-11-13 2022-12-22 Fmc Kongsberg Subsea As A Module, A System and A Method for Daisy Chaining of Satellite Wells
US20230135913A1 (en) * 2020-04-15 2023-05-04 J. Ray Mcdermott, S.A. Non-metallic subsea skid apparatus and methods

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO343829B1 (en) * 2017-10-17 2019-06-17 Fmc Kongsberg Subsea As Subsea system and method of installing a subsea system
NO20210350A1 (en) * 2018-08-20 2021-03-18 Csub As Well protection assembly

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US3633667A (en) * 1969-12-08 1972-01-11 Deep Oil Technology Inc Subsea wellhead system
US3777812A (en) * 1971-11-26 1973-12-11 Exxon Production Research Co Subsea production system
US3877520A (en) * 1973-08-17 1975-04-15 Paul S Putnam Subsea completion and rework system for deep water oil wells
US4090560A (en) * 1975-08-27 1978-05-23 A/S Akers Mek. Verksted Junction housing for use in undersea oil wells
US4120362A (en) * 1976-11-22 1978-10-17 Societe Nationale Elf Aquitaine (Production) Subsea station
US4192383A (en) * 1978-05-02 1980-03-11 Armco Inc. Offshore multiple well drilling and production apparatus
US4625805A (en) * 1983-11-21 1986-12-02 Societe Nationale Elf Aquitaine (Production) Oil production installation for a subsea station of modular design
US5025865A (en) * 1986-10-04 1991-06-25 The British Petroleum Company P.L.C. Subsea oil production system
US5192167A (en) * 1990-10-12 1993-03-09 Petroleo Brasileiro S.A.-Petrobras Subsea production system
WO2019076580A1 (fr) * 2017-10-17 2019-04-25 Fmc Kongsberg Subsea As Système sous-marin et procédé d'installation d'un système sous-marin

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NO333136B1 (no) * 2009-03-10 2013-03-11 Aker Subsea As Havbunnsbrønnramme med manifoldmottaksrom
NO20111340A1 (no) * 2011-10-03 2013-04-04 Aker Subsea As Undervanns dokkingsstasjon

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US3633667A (en) * 1969-12-08 1972-01-11 Deep Oil Technology Inc Subsea wellhead system
US3777812A (en) * 1971-11-26 1973-12-11 Exxon Production Research Co Subsea production system
US3877520A (en) * 1973-08-17 1975-04-15 Paul S Putnam Subsea completion and rework system for deep water oil wells
US4090560A (en) * 1975-08-27 1978-05-23 A/S Akers Mek. Verksted Junction housing for use in undersea oil wells
US4120362A (en) * 1976-11-22 1978-10-17 Societe Nationale Elf Aquitaine (Production) Subsea station
US4192383A (en) * 1978-05-02 1980-03-11 Armco Inc. Offshore multiple well drilling and production apparatus
US4625805A (en) * 1983-11-21 1986-12-02 Societe Nationale Elf Aquitaine (Production) Oil production installation for a subsea station of modular design
US5025865A (en) * 1986-10-04 1991-06-25 The British Petroleum Company P.L.C. Subsea oil production system
US5192167A (en) * 1990-10-12 1993-03-09 Petroleo Brasileiro S.A.-Petrobras Subsea production system
WO2019076580A1 (fr) * 2017-10-17 2019-04-25 Fmc Kongsberg Subsea As Système sous-marin et procédé d'installation d'un système sous-marin

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11346185B2 (en) * 2018-01-04 2022-05-31 Subsea 7 Norway As Integrating wells in towable subsea units
US20220403715A1 (en) * 2019-11-13 2022-12-22 Fmc Kongsberg Subsea As A Module, A System and A Method for Daisy Chaining of Satellite Wells
US11840907B2 (en) * 2019-11-13 2023-12-12 Fmc Kongsberg Subsea As Module, a system and a method for daisy chaining of satellite wells
GB2593464A (en) * 2020-03-23 2021-09-29 Aker Solutions As Modular subsea manifold system
WO2021194350A1 (fr) * 2020-03-23 2021-09-30 Aker Solutions As Système de collecteur sous-marin modulaire
GB2593464B (en) * 2020-03-23 2022-07-20 Aker Solutions As Modular subsea manifold system
GB2608053A (en) * 2020-03-23 2022-12-21 Aker Solutions As Modular subsea manifold system
GB2608053B (en) * 2020-03-23 2024-03-27 Aker Solutions As Modular subsea manifold system and installation method
US20230135913A1 (en) * 2020-04-15 2023-05-04 J. Ray Mcdermott, S.A. Non-metallic subsea skid apparatus and methods
NO20210289A1 (en) * 2021-03-04 2022-09-05 Horisont Energi As Subsea Template for Injecting Fluid for Long Term Storage in a Subterranean Void and Method of Controlling a Subsea Template
NO346594B1 (en) * 2021-03-04 2022-10-24 Horisont Energi As Subsea Template for Injecting Fluid for Long Term Storage in a Subterranean Void and Method of Controlling a Subsea Template

Also Published As

Publication number Publication date
NO20162048A1 (en) 2018-06-25
AU2017381942B2 (en) 2020-10-22
EP3559402B1 (fr) 2022-08-31
NO344888B1 (en) 2020-06-15
EP3559402A1 (fr) 2019-10-30
WO2018115347A1 (fr) 2018-06-28
AU2017381942A1 (en) 2019-07-11

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