WO2016085348A1 - Arrangement for supporting a wellhead - Google Patents
Arrangement for supporting a wellhead Download PDFInfo
- Publication number
- WO2016085348A1 WO2016085348A1 PCT/NO2015/050222 NO2015050222W WO2016085348A1 WO 2016085348 A1 WO2016085348 A1 WO 2016085348A1 NO 2015050222 W NO2015050222 W NO 2015050222W WO 2016085348 A1 WO2016085348 A1 WO 2016085348A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wellhead
- casing
- supporting frame
- bending moment
- wellhead casing
- Prior art date
Links
- 230000008093 supporting effect Effects 0.000 title claims abstract description 56
- 238000005452 bending Methods 0.000 claims abstract description 31
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 description 8
- 206010016256 fatigue Diseases 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000004020 conductor Substances 0.000 description 6
- 238000005553 drilling Methods 0.000 description 4
- 230000000284 resting effect Effects 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 241000191291 Abies alba Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/035—Well heads; Setting-up thereof specially adapted for underwater installations
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
- E21B33/043—Casing heads; Suspending casings or tubings in well heads specially adapted for underwater 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
- E21B43/02—Subsoil filtering
- E21B43/10—Setting of casings, screens, liners or the like in wells
- E21B43/101—Setting of casings, screens, liners or the like in wells for underwater installations
Definitions
- the invention relates to a device for reducing the strain on a wellhead casing from a bending moment generated by a horizontal load component from a well element arranged over a wellhead.
- BOP blowout preventer
- a suction anchor enclosing an upper portion of a conductor casing and parts of a wellhead is known.
- a frame is connected, arranged to carry a swivel device for the horizontal connection of a riser et cetera, the frame resting on separate suction anchors placed at a distance from the former suction anchor.
- a stabilizing device for a wellhead with the upper portion of a wellhead casing projecting up above a seabed in which a wellhead valve which projects up from the upper portion of the wellhead casing is completely or partially supported on the suction foundation by several supporting elements being arranged between the wellhead valve and the suction foundation.
- US2006162933A1 discloses a system and a method of establishing a subsea exploration and production system, in which a well casing, projecting up from a seabed where a well is to be stab- lished, is provided with a buoyancy body arranged at a distance above the seabed.
- the buoyancy body is stabilized by means of adjustable stabilizing elements, which are anchored to the seabed at a distance from the well casing.
- the dimension of the wellhead casing has gradually been increased, the diameter having increased from 30 inches to 36 inches and further to 42 inches, with a wall thickness that has increased from 1 inch all the way up to 2 inches.
- wellhead valve covers both a blowout preventer (BOP) alone and also a combination of a blowout preventer and other valve types (for example production valves), and other valve types or combinations of valve types alone, said wellhead valve being arranged on a wellhead on an end portion of a wellhead casing projecting above a seabed.
- BOP blowout preventer
- other valve types for example production valves
- the invention has for its object to remedy or reduce at least one of the drawbacks of the prior art or at least provide a useful alternative to the prior art.
- the invention provides a method and a device for reducing the risk of fatigue in a wellhead without increasing the pipe dimension, that is to say the pipe-wall thickness, the pipe diameter or the material quality, of the wellhead casing projecting up above the seabed and forming the wellhead, and without intervening in valves and so on mounted on the wellhead.
- the invention involves having a supporting frame, which, at a distance from the well centre, is supported on a foundation that rests on a seabed, rigidly connected to the wellhead casing to absorb a substantial portion of a bending moment applied to the wellhead casing by a horizontal load component.
- the invention relates, more specifically, to a device for reducing the strain on a wellhead casing from a bending moment generated by a horizontal load component from a well element arranged over a wellhead, characterized by a supporting frame being connected to an upper portion of the wellhead casing and projecting outwards from the centre axis of the wellhead casing and being provided with abutments resting in a supporting manner on a base at a radial distance from the wellhead casing, the supporting frame being arranged to absorb a portion of said bending moment.
- the supporting frame may include a well-casing extension adapted for connection to the wellhead casing.
- the ratio of the maximum bending moment absorbed by the supporting frame to the bending moment applied to the wellhead casing may be at least 1 :2, alternatively at least 3:4, alternatively at least 9:10.
- connection between the supporting frame and the wellhead casing, possibly between the supporting frame and the well-casing extension may be formed as a zero-clearance connection.
- the supporting frame may include a coupling formed as a sleeve enclosing a portion of the well- head casing, possibly the well-casing extension, by a press fit.
- the sleeve may have been shrunk around a portion of the wellhead casing, possibly the well-casing extension.
- the base may be a seabed or a wellhead foundation.
- the advantage of this is that the supporting frame may be placed on the type of base that is the most suitable in each situation.
- Figure 1 shows a principle drawing of a wellhead provided with a supporting frame directly connected to an upper portion of a wellhead casing
- Figure 2 shows, in a highly simplified manner, the elements that absorb load when a wellhead is subjected to a bending moment from a horizontal load component
- Figure 3 shows a principle drawing of a wellhead provided with a supporting frame connected to an upper portion of a wellhead casing via a well-casing extension integrated in the supporting frame.
- a subsea well 1 extends downwards in an underground 4 under a water mass 5.
- a wellhead 1 1 is arranged immediately above a seabed 41 , an upper portion 12a of a wellhead casing 12 projecting up from the seabed and forming the wellhead 1 1 in which one or more wellhead elements 2 are arranged, at least a Christmas tree including a blowout preventer (also referred to as a BOP).
- a blowout preventer also referred to as a BOP
- From the wellhead element 2 at least a marine riser 3 extends up through the water mass 5 to a surface installation (not shown).
- the riser 3 is shown as being deflected in order to indicate a situation in which the wellhead 1 1 is subjected to a horizontal load component L h which subjects the wellhead casing 12 to a bending moment M w .
- the deflection of the riser 3 may be due to currents in the water mass 5 or the position of the surface installation not shown. Currents in the water mass 5 may also subject the wellhead element 2 to a horizontal load component L h , and skewed distribution of the mass of the wellhead element 2 will also subject the wellhead 1 1 to a horizontal load component L h .
- the wellhead casing 12 is shown here as a casing 122 extending up through a so-called conductor casing 121 which bounds the well 1 in a manner known per se towards the unconsolidated masses in the upper part of the base 4.
- the base 13 may be any wellhead foundation, for example a suction foundation or a well frame which provides a sufficiently large degree of stability and ability to absorb a load L v which is transmitted through the supporting frame 6.
- the wellhead casing 12 and the supporting frame 6 are connected to each other in a way that makes it possible for the supporting frame 6 to absorb a bending moment M f as a reaction to the horizontal load component L h from the wellhead element 2 subjecting the wellhead casing 12 to said bending moment M w .
- a coupling 62 may be arranged in such a way that the wellhead casing 12 is allowed a certain deflection before hitting the supporting frame 6 and the further load being substantially absorbed by the supporting frame 6.
- the design of the coupling 62 and the dimensioning of the supporting frame 6 can thereby be used to control how great a load the wellhead casing 12 may be subjected to. Calculations carried out by the applicant and other instances have shown that the supporting frame 6 may absorb 75 to 95 % of the strain caused by said horizontal load component L h .
- the coupling 62 is advantageously formed as a sleeve 621 surrounding a portion of the wellhead casing 12 without radial clearance. This is advantageously achieved by shrinking the sleeve 621 .
- the supporting frame 6 according to figure 1 is suitable for permanent installation on the wellhead 1 1 .
- FIG 3 in which the supporting frame 6 is provided with a well-casing extension 63 which is adapted for insertion between the wellhead casing 12 and the wellhead element 2. Thereby the supporting frame 6 can be installed without any intervention into the wellhead casing 12.
- This embodiment is well suited for temporary installation, for example while drilling is in progress, indicated here by a drill string 7 extending from a surface installation not shown and through the wellhead 1 1 .
- the well-casing extension 63 also works as a protection of the wellhead 1 1 during the temporary installation of wellhead elements 2 or the insertion or withdrawal of drilling equipment.
- Figure 2 shows the statics of the supporting frame 6 in principle. Solid, oblique connecting lines between horizontal and vertical lines indicate that the connection is rigid. Broken, oblique connecting lines indicate that the connection can allow a restricted relative movement, as is described for the coupling 62 above.
- the supporting frame 6 When the supporting frame 6 is mounted on the wellhead 1 1 and the wellhead 1 1 is subjected to a bending moment M w generated by a horizontal load component L n from above-lying elements 2, 3, the supporting frame 6 is subjected to a vertical load L v which is transmitted to the seabed 41 at a distance from the centre axis of the wellhead casing 12 through the abutment of the supporting frame 6 against the base.
- the portion of the applied bending moment M w absorbed by the supporting frame that is to say M f /M w , M f being the bending moment absorbed by the supporting frame 6, will vary. Calculations show that it is quite possible to dimension the sup- porting frame 6 to enable absorption of at least 9/10 of the bending moment M w applied.
Landscapes
- 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)
- Excavating Of Shafts Or Tunnels (AREA)
- Earth Drilling (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/522,518 US10287840B2 (en) | 2014-11-27 | 2015-11-25 | Arrangement for supporting a wellhead |
BR112017009723-0A BR112017009723B1 (en) | 2014-11-27 | 2015-11-25 | Device for reducing the load on an underwater wellhead housing |
AU2015354871A AU2015354871C1 (en) | 2014-11-27 | 2015-11-25 | Arrangement for supporting a wellhead |
MX2017006540A MX2017006540A (en) | 2014-11-27 | 2015-11-25 | Arrangement for supporting a wellhead. |
CA2966484A CA2966484C (en) | 2014-11-27 | 2015-11-25 | Arrangement for supporting a wellhead |
GB1706604.4A GB2549003B (en) | 2014-11-27 | 2015-11-25 | Arrangement for supporting a wellhead |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO20141427 | 2014-11-27 | ||
NO20141427A NO340947B1 (en) | 2014-11-27 | 2014-11-27 | Device at wellhead |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016085348A1 true WO2016085348A1 (en) | 2016-06-02 |
Family
ID=56074750
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NO2015/050222 WO2016085348A1 (en) | 2014-11-27 | 2015-11-25 | Arrangement for supporting a wellhead |
Country Status (8)
Country | Link |
---|---|
US (1) | US10287840B2 (en) |
AU (1) | AU2015354871C1 (en) |
BR (1) | BR112017009723B1 (en) |
CA (1) | CA2966484C (en) |
GB (2) | GB2585602B8 (en) |
MX (1) | MX2017006540A (en) |
NO (1) | NO340947B1 (en) |
WO (1) | WO2016085348A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018146571A1 (en) | 2017-02-07 | 2018-08-16 | Neodrill A.S. | Wellbore cement management system |
US20190128084A1 (en) * | 2016-03-08 | 2019-05-02 | Equinor Energy As | Subsea wellhead assembly |
WO2019083378A1 (en) * | 2017-10-26 | 2019-05-02 | Equinor Energy As | Wellhead assembly installation |
WO2019103625A1 (en) * | 2017-11-27 | 2019-05-31 | Equinor Energy As | Wellhead load relief device |
EP3597854A1 (en) | 2018-07-20 | 2020-01-22 | Neodrill AS | Arrangement for supporting a wellhead |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO342443B1 (en) | 2015-11-25 | 2018-05-22 | Neodrill As | Well head foundations system |
GB2584656B (en) * | 2019-06-07 | 2021-11-17 | Equinor Energy As | Well assembly monitoring |
NO20190875A1 (en) * | 2019-07-11 | 2021-01-12 | Neodrill As | Riser stabilization system |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4260289A (en) * | 1978-06-21 | 1981-04-07 | Societe Nationale Elf Aquitaine (Production) | Connection-disconnection device between tubing and underwater wellhead for use with articulated production installations |
US4558973A (en) * | 1984-06-21 | 1985-12-17 | Seahorse Equipment Corporation | Subsea wellhead protector |
US20100212916A1 (en) * | 2009-02-26 | 2010-08-26 | Jim Rice | Stabilizing structure for wellhead equipment |
WO2011162616A1 (en) * | 2010-06-22 | 2011-12-29 | Neodrill As | Device and method for stablization of a wellhead, and also use of a suction substructure for support of a wellhead |
WO2014210017A2 (en) * | 2013-06-24 | 2014-12-31 | Bp Corporation North America, Inc. | Systems and methods for bracing subsea wellheads to enhance the fatigue resistance of subsea wellheads and primary conductors |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
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NO305179B1 (en) * | 1996-08-27 | 1999-04-12 | Norske Stats Oljeselskap | Underwater well device |
FR2760813B1 (en) * | 1997-03-14 | 1999-04-09 | Coflexip | DEVICE FOR CURVING A FLEXIBLE PIPE |
NO313340B1 (en) | 2000-02-29 | 2002-09-16 | Harald Strand | Procedure for piling guide tubes into a water bottom |
US20060162933A1 (en) * | 2004-09-01 | 2006-07-27 | Millheim Keith K | System and method of installing and maintaining an offshore exploration and production system having an adjustable buoyancy chamber |
NO328634B1 (en) * | 2008-02-13 | 2010-04-12 | Fmc Kongsberg Subsea As | Joints for use in conjunction with a riser, riser with such a joint and method for reducing the buoyancy moments in a riser |
US9388642B2 (en) * | 2008-03-05 | 2016-07-12 | Schlumberger Technology Corporation | Flexible pipe fatigue monitoring below the bend stiffener of a flexible riser |
WO2011018120A1 (en) * | 2009-08-14 | 2011-02-17 | Statoil Asa | Subsea well head structure |
NO333482B1 (en) * | 2010-10-15 | 2013-06-24 | Aker Subsea As | A well head assembly |
NO334839B1 (en) * | 2010-11-16 | 2014-06-16 | Aker Subsea As | Wellhead system and locking device for blowout protection |
AR083372A1 (en) * | 2011-10-11 | 2013-02-21 | Hot Hed S A | TRANSITORY SUPPORT DEVICE FOR PIPES OF OIL WELLS AND METHOD OF USE OF SUCH DEVICE |
WO2014210035A2 (en) * | 2013-06-24 | 2014-12-31 | Bp Corporation North America, Inc. | Systems and methods for tethering subsea wellheads to enhance the fatigue resistance of subsea wellheads and primary conductors |
-
2014
- 2014-11-27 NO NO20141427A patent/NO340947B1/en active IP Right Review Request
-
2015
- 2015-11-25 AU AU2015354871A patent/AU2015354871C1/en active Active
- 2015-11-25 MX MX2017006540A patent/MX2017006540A/en unknown
- 2015-11-25 GB GB2014821.9A patent/GB2585602B8/en active Active
- 2015-11-25 US US15/522,518 patent/US10287840B2/en active Active
- 2015-11-25 CA CA2966484A patent/CA2966484C/en active Active
- 2015-11-25 GB GB1706604.4A patent/GB2549003B/en active Active
- 2015-11-25 BR BR112017009723-0A patent/BR112017009723B1/en active IP Right Grant
- 2015-11-25 WO PCT/NO2015/050222 patent/WO2016085348A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4260289A (en) * | 1978-06-21 | 1981-04-07 | Societe Nationale Elf Aquitaine (Production) | Connection-disconnection device between tubing and underwater wellhead for use with articulated production installations |
US4558973A (en) * | 1984-06-21 | 1985-12-17 | Seahorse Equipment Corporation | Subsea wellhead protector |
US20100212916A1 (en) * | 2009-02-26 | 2010-08-26 | Jim Rice | Stabilizing structure for wellhead equipment |
WO2011162616A1 (en) * | 2010-06-22 | 2011-12-29 | Neodrill As | Device and method for stablization of a wellhead, and also use of a suction substructure for support of a wellhead |
WO2014210017A2 (en) * | 2013-06-24 | 2014-12-31 | Bp Corporation North America, Inc. | Systems and methods for bracing subsea wellheads to enhance the fatigue resistance of subsea wellheads and primary conductors |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10753168B2 (en) * | 2016-03-08 | 2020-08-25 | Equinor Energy As | Subsea wellhead assembly |
US20190128084A1 (en) * | 2016-03-08 | 2019-05-02 | Equinor Energy As | Subsea wellhead assembly |
AU2017231594B2 (en) * | 2016-03-08 | 2022-07-21 | Equinor Energy As | Subsea wellhead assembly |
US11208861B2 (en) | 2016-03-08 | 2021-12-28 | Equinor Energy As | Subsea wellhead assembly |
WO2018146572A1 (en) | 2017-02-07 | 2018-08-16 | Neodrill A.S. | Apparatus and methods for supporting a subsea well |
WO2018146571A1 (en) | 2017-02-07 | 2018-08-16 | Neodrill A.S. | Wellbore cement management system |
CN110226018A (en) * | 2017-02-07 | 2019-09-10 | 新钻探有限公司 | Support the device and method of sub-sea drilled wells |
WO2019083378A1 (en) * | 2017-10-26 | 2019-05-02 | Equinor Energy As | Wellhead assembly installation |
GB2568824B (en) * | 2017-10-26 | 2021-07-14 | Equinor Energy As | Wellhead assembly installation |
US11293248B2 (en) | 2017-10-26 | 2022-04-05 | Equinor Energy As | Wellhead assembly installation |
AU2018355970B2 (en) * | 2017-10-26 | 2024-02-01 | Equinor Energy As | Wellhead assembly installation |
WO2019103625A1 (en) * | 2017-11-27 | 2019-05-31 | Equinor Energy As | Wellhead load relief device |
US11448031B2 (en) | 2017-11-27 | 2022-09-20 | Equinor Energy As | Wellhead load relief device |
EP3597854A1 (en) | 2018-07-20 | 2020-01-22 | Neodrill AS | Arrangement for supporting a wellhead |
Also Published As
Publication number | Publication date |
---|---|
GB2549003B (en) | 2022-01-19 |
MX2017006540A (en) | 2017-08-09 |
CA2966484C (en) | 2023-03-14 |
AU2015354871B2 (en) | 2018-03-01 |
AU2015354871C1 (en) | 2023-03-02 |
NO20141427A1 (en) | 2016-05-30 |
AU2015354871A1 (en) | 2017-06-29 |
US10287840B2 (en) | 2019-05-14 |
NO340947B1 (en) | 2017-07-24 |
GB2585602B (en) | 2022-01-19 |
GB2585602A8 (en) | 2022-09-28 |
GB2549003A (en) | 2017-10-04 |
GB201706604D0 (en) | 2017-06-07 |
GB2585602B8 (en) | 2022-09-28 |
US20170356265A1 (en) | 2017-12-14 |
GB202014821D0 (en) | 2020-11-04 |
BR112017009723A2 (en) | 2018-01-02 |
BR112017009723B1 (en) | 2022-04-19 |
CA2966484A1 (en) | 2016-06-02 |
GB2585602A (en) | 2021-01-13 |
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