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Conductor Stabilization Solution (CSS)
Oceaneering Presentation Template - Rev 21.02.2011
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Challenge:
Wave induced damage
Presentation of CSS
Conductor & Caisson Damage
Conductor Guide Fracturing
Conductor Guide Fatigue
Decreased Guide Stability
Offshore installation, North Sea 2007
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Challenge:
Wave induced damage
Presentation of CSS
Safety Concerns
Production Stop
Vibrations migrating to structure
Costly repair
Oseberg feltsenter 2006
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4 CSS INSTALLED TOPSIDE
New and better solution:
Conductor Stabilization
SolutionCSS
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New & Better Solution
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Presentation of CSS
CSS
A elastic and stress-absorbing compound calledElasturan is cast
into the entire length and
diameter of the conductor/caisson guide.CSS entirely replace the
traditional need forcentering and chocking solutions.
CSS extend the life of conductors & caissons.
CSS allow vertical movement ofconductor/caisson
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Traditional vs. CSS
Traditional Methods
Steel against steel solutions
Need to perfectly align centering guide
Chocking solution
Require maintenance
CSS
Steel against stress-absorbent material No need for centering
guide
Do not require maintenance
Easy, efficient and safe installation
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Presentation of CSS
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Traditional vs. CSS
Traditional Methods
Not applied to entire conductor guide
Requires corrosion protection
Customized solution
CSS
Uses 100% of conductor guide
Applicable material data & specifications
Adaptable & scalable solution
Eliminating point stress loads.
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Presentation of CSS
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First installed in 1999, at the Sleipner platform. No
maintenance has beenrequired on this CSS installation.
Easy & safe installation. Equipment for installation can be
used in classified
areas. Dynamic loads are reduced,
Stress loads are distributed over a wider area, thus point
stress loads areeliminated.
Installation is performed with use of rope access technique, no
need forscaffold.
Subsea application available. Performed 100 % with ROV. No
divers.
Presentation of CSS
Advantages with the CSS:
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Topside installation of CSS are performed with rope access
technique,hence no scaffold is required. The Oceaneering personnel
have thenecessary experience and knowledge for anchor point rigging
and settingbarriers.
Removal of steel centralizers are performed by experienced rope
accesstechnicians.
Presentation of CSS
3 step installation process
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1. Lower conductor tube
Wax the lower part of the guide Mount the waxed cast form Fill
up the cast with Elasturan
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2. Middle conductor tube
Fill the middle with Elasturan Remove the steel centering
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3. Top conductor tube
Wax the upper part of the guide Fill the top with Elasturan
Remove the cast form
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CSS Subsea
Presentation of CSS
CSS packed and seafastened on ROVvessel, during transport to
offshoreinstallation
8 x CSS element subsea basket
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CSS Subsea
Presentation of CSS
CSS being installed in subsea with ROV
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CSS Subsea
Presentation of CSS
CSS installed and locking mechanisms engaged
TAG plate
Locking mechanisms
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CSS Subsea
Presentation of CSS
CSS installed in subsea guide CSS installed in subsea guide
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First CSS installed on Statoil installation in the North Sea
Performed in y.1999
Presentation of method for Hydro Performed in y.2006
Test of material at sub-supplier in Sweden Performed in
y.2006
MSDS and chemicals in CSS approved for use Performed in
y.2006
Building full scale conductor/guide mock-up Performed in
y.2006
Full scale test on CSS in conductor/guide mock-up Performed in
y.2006
BP Valhall Casting of 9 conductor guides Per fo rmed in
y.2009
Statoil Grane Casting of 19 conductor guides Per fo rmed in
y.2010
Statoil Oseberg East Casting of 30 conductor guides Per fo rmed
in y.2010
Statoil Oseberg C Casting of 11 conductor guides Per fo rmed in
y.2010
BP Valhall - Casting of 15 conductor guides Performed in
y.2011
Statoil Oseberg Felt Senter Casting of 80 conductor guides Per
fo rmed in y.2011/12/13
Statoil Brage Installation of 2 x Subsea CSS Per fo rmed in
y.2011
Statoil Grane - Installation of 37 x Subsea CSS Per fo rmed in
y.2012
Statoil Grane Casting of 12 conductor guides Per fo rmed in
y.2012
Presentation of CSS
References
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www.css.no
http://www.youtube.com/watch?v=tSQx2tri180
http://www.youtube.com/watch?v=UHHHDDa_bZE
Presentation of CSS
Further reading and info:
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http://www.css.no/http://www.youtube.com/watch?v=tSQx2tri180http://www.youtube.com/watch?v=tSQx2tri180http://www.youtube.com/watch?v=UHHHDDa_bZEhttp://www.youtube.com/watch?v=UHHHDDa_bZEhttp://www.youtube.com/watch?v=UHHHDDa_bZEhttp://www.youtube.com/watch?v=tSQx2tri180http://www.youtube.com/watch?v=tSQx2tri180http://www.youtube.com/watch?v=tSQx2tri180http://www.youtube.com/watch?v=tSQx2tri180http://www.css.no/
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Oceaneering Asset Integrity AS - Norway
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Kjell Bjrnar Strksen
Dep. Manager Video Inspection and CSS
[email protected]
Mobile: +47 95 24 27 12
mailto:[email protected]:[email protected]
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Thank You for Your Attention!
