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1
STATUS REPORTISO/TC 67/SC 4/WG 6
“SUBSEA EQUIPMENT”
Presentation San Francisco 22.06.07
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STATUS REPORTISO/TC 67/SC 4/WG 6 “SUBSEA EQUIPMENT”
• Terminology and definitions ISO 15926 N-172 rev 2 2006-08-29 NB! Summary doc. comments?
• Next amendment drilling loads including fatigue loads• New issues as subsea data management facilitating
“integrated” operation / subsea processing / Subsea to beach
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STATUS REPORTISO/TC 67/SC 4/WG 6 “SUBSEA EQUIPMENT”
• DIS comments resolved DIS ballot pending
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STATUS REPORTISO/TC 67/SC 4/WG 6 “SUBSEA EQUIPMENT”
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STATUS REPORTISO/TC 67/SC 4/WG 6 “SUBSEA EQUIPMENT”
• DIS ballot closed Feb. 2007 • Comments resolved • Amendment identified to stage “revision” in order
to progress the doc.
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STATUS REPORTISO/TC 67/SC 4/WG 6 “SUBSEA EQUIPMENT”
• Forwarded to SC 4 for further processing to DIS
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STATUS REPORTISO/TC 67/SC 4/WG 6 “SUBSEA EQUIPMENT”
• Preparing rev proposal will interface with IWOCS proposal to be forwarded. Ref. -7 and listed -14
• Control system will increase in importance in the future
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STATUS REPORTISO/TC 67/SC 4/WG 6 “SUBSEA EQUIPMENT”
• Revise with separate annex on IWOCX. This will require a task group including project leader and controls & operational expertise. Will interface with BOP controls document and -6
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STATUS REPORTISO/TC 67/SC 4/WG 6 “SUBSEA EQUIPMENT”
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STATUS REPORTISO/TC 67/SC 4/WG 6 “SUBSEA EQUIPMENT”
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STATUS REPORTISO/TC 67/SC 4/WG 6 “SUBSEA EQUIPMENT”
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STATUS REPORTISO/TC 67/SC 4/WG 6 “SUBSEA EQUIPMENT”
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STATUS REPORTISO/TC 67/SC 4/WG 6 “SUBSEA EQUIPMENT”
• Been struggling with accept criteria (different philosophy GOM & Europe)
• Have held several meetings to resolve issues and progress the document
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STATUS REPORTISO/TC 67/SC 4/WG 6 “SUBSEA EQUIPMENT”
• CD confirmed for late Nov. 2007• Awaiting input from GOM / API• Resource re-evaluation in August have had changes in
task group funding OK• Grey areas between documents has been identified and
will be clarified (Pig launch/service hubs and connectors)
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STATUS REPORTISO/TC 67/SC 4/WG 6 “SUBSEA EQUIPMENT”
• Proposed as annex for 13628-7
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STATUS REPORTISO/TC 67/SC 4/WG 6 “SUBSEA EQUIPMENT”
• New project leader being confirmed (delayed by Statoil/Hydro merger) previous project leader moved to a different company
• DNV will produce the first WD and funding for this is in place
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STATUS REPORTISO/TC 67/SC 4/WG 6 “SUBSEA EQUIPMENT”
• Parts of meeting Tuesday next week will address this issue • Large overlap between the current proposal and ISO 20815• Uncertainty as to potentially having two documents with large overlap in the
ISO suit of documents guidance asked from SC 4 on this. Should a NWI be raised?
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STATUS REPORTISO/TC 67/SC 4/WG 6 “SUBSEA EQUIPMENT”
Materials issue in different documents
• Information as to the mandate for the WG and interfacing with existing groups that have material requirements in their documents was queried in the combined WG 6 and SC 17 meeting in Feb. 2007
• The 13628 series has material requirements in several documents and the hierarchy described is that substandard requirement s take priority if in conflict with 13628-1 “system”document.
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STATUS REPORTISO/TC 67/SC 4/WG 6 “SUBSEA EQUIPMENT”
Well integrity issues “well foundation”
• Several wells have been abandoned due to problems with well integrity (probable and confirmed fatigue problems)
• Revised drilling loads is worked by DNV to be updated in NORSOK U 001. These are planned to be proposed for amendment of 13628-1
• Reason for fatigue load inclusion is extended periods with rig on wells due to longer and more complex wells as well as increased intervention frequencies
• Result is an increasing deviation between surface and subsea equipment affected by these industry development
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STATUS REPORTISO/TC 67/SC 4/WG 6 “SUBSEA EQUIPMENT”
Well integrity issues “well foundation” Wave Motions
Vessel Offset
Surface Pressure Pump
Draw Works, Tension and StrokeSurface Equipment
Slick Joint
Tensioner SheavesTensioner Tension and Stroke
Tension Joint
Wave and Current Forces
Gravity
Outside Diameter
Riser Joints
Effective Tension
Bending Stiffness
External Pressure
Stress Joint
Subsea Equipment
Soil restraint
Bottom hole assy
Conducto
Downstrea
Exc
itatio
n zo
ne
Shea
r zo
ne
Crest Through (-Current Velocity
Dam
ping
zon
e
Upstream
Drill Floor
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Typical Riser Load on Wellhead
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Factors affecting ”bending” of normally critical riser sections and affecting permanent equipment
• Seabed conditions (bending below above seabed) casing cementing, temperature gradients
• Riser and BOP/LMR sizes & weights
• Flex joints stiffness (top/bottom)
• Tension & Vessel position• Vessel RAO data & Station
keeping• Environmental conditions
LOWERRISER
UPPERRISER
SoftSoil
Casing
Conductor
BOP
LMRP
LowerFlex-Joint
FirmSoil
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STATUS REPORTISO/TC 67/SC 4/WG 6 “SUBSEA EQUIPMENT”
Resent changes / extensions of earlier practices within the subsea sector of the industry
• Subsea processing being implemented & this has raised issues of what std’s and norms should be used for such systems/equipment?
• More frequent intervention on wells and “new” ways of intervening are maturing
• This put new requirements on permanent equipment to better facilitate such intervention
• Impact on the 13628 series of documents has to be reviewed • Safety authorities are focusing safety issues and he requirements
are different on the different continental shelves e. vessel requirements for well intervention vessels.
• Interfaces between the 13628 series and other WG’s and SC’sdocuments will increase in importance in the future as functionality increase in the subsea systems and intervention associated with these systems diversifies
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STATUS REPORTISO/TC 67/SC 4/WG 6 “SUBSEA EQUIPMENT”
Working Mode in the different groups• Some groups use teleconference and net
meetings with great success • Some issues are difficult to resolve without
working meetings where we discuss and resolve issues face to face (body language is said to be 80% of communication)
• More teleconference is expected to be used according to some of the of the project leaders.