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MEK 4450Marine OperationsKværner ASA / DNV, Fall 2012

Various Types of Platforms

Floating or bottom fixed

Living quarters, storage, drilling, processing etc

Foundation + topside

Installation

Prepare for transportLoad-out, dry towTransfer to floating condition, wet tow

Tow to fieldDesign of towing fleet

InstallationTransfer to “installation mode”Positioning (horizontal and vertical)Hook-up to mooring, set- down on sea floor etc.

Installation of topside

Jacket fabrication

Bilder

Load-out

Bilder

Load-out

Bilder

Transportation

Bilder

Some challenges during launch and upending

Position and size of temporary buoyancy tanks

Maximum forces at rocker beamMaximum depth during launch

Structural loads due to hydrostatic pressureBottom clearance

Floating condition after launchAccess to lifting arrangement

UpendingStructural loadsCrane loadBottom clearances

Proper upright positionBallasting of side legs

Jacket installation: crane lift

Jacket installation,- final phases

Jacket in upright position?Ballast in jacket legs

Transit to set-down point. Several 100 meters

Further ballasting and lowering by crane

Landing

Release crane

On-bottom stability in temporary phase?

Piling

Topside

Bilder av Loadout og floatoverSkidding or trailers

Topside

Float-over

Topside

Bilde av Dry tow-out

GBS

Bilder at GBS utslep og installasjon

Jack- up

Jack-up footings

Tension Leg Platform (TLP)

Platform with buoyant sub-structure

Vertical strong and stiff mooring, high pre-tension

Vertical motion arrested

Large horizontal motions

TLP installation

Lowering and piling of foundations

Tendon installation

Tow-out of platform

Hook-up and pre-tensioning

Types of floaters

Installation of mooring system

Tow-out and installation of floater

Tow-out and installation of floater

Tow-out and installation of floater

Mooring hook-up

Mooring hook-up

Skisser