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TENSION-LEG PLATFOR
(TLP)
CET- 648 DESIGN OF FIXED AND FLOATING OFFSHORE STRUC
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LT Sirapol Rungratanubol
Presented By
Mr.Wisit Kawayapanik ID:55070700954
Mr.Nattapon Chaipromma ID:56070700904
Mr.Prasong Suramai ID:56070700906
Mr.Wichan Bootdee ID:56070700908
Mr.Suttiwat Limjirawatana ID:56070700912
Tension-leg platform (TLP)
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History
Component
◦ Installation sequence
◦ Platform Installation
Structural Design and Design Criteria
P-61 TLP New platform
Tension-leg platform (TLP)
Content
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.
Tension-leg platform (TLP)
History
1500 to 7000 Ft
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First offshore in Gulf of Mexico, USA 1947. (Kerr-McGee)
Kermac Rig No. 16
TLPs have been in use since the early 1980s.
leg platform was built for Conoco's Hutton field
Day Tree, Water Depth 482feet,
Tension-leg platform (TLP)
History
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1989 First Wellhead TLP Jolliet, Gulf of Maxico, USA
Day Tree, Water Depth 1,759feet,
Tension-leg platform (TLP)
History
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1995 BIGGEST TLP Heidrun, Norwegian Sea, NORWAY
Day/Wet Tree, Water Depth 1,132feet,
Tension-leg platform (TLP)
History
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1998 First mini-TLP Morpeth, Gulf of Maxico, USA
Wet Tree, Water Depth 1,699feet,
Tension-leg platform (TLP)
History
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Tension-leg platform (TLP)
History
2005 Deepest TLP Mannolia, Gulf of Maxico, USA
Day Tree, Water Depth 4,674feet,
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Tension-leg platform (TLP)
History
2014 Lastly TLP P-61 Tension Leg Wellhead Platform (TLWP)
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Tension-leg platform (TLP)
History
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Tension-leg platform (TLP)
History
25
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Tension leg platform (TLP) is one of the most widely installed floaproduction system (FPS) for offshore deepwater oil and gas dev
TLP is particularly suitable for water depth between 300 m to 160
Tension-leg platform (TLP)
Component
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Tension leg platform (TLP) are three type;
Full-size TLPs
Mini TLPs
Wellhead TLPs
Tension-leg platform (TLP)
Component
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Unlike the semi-submersible Permanently site production
Hull is to provide buoyancy, both for support of weight and to provide tendon tens
Ballast is provide to even loading between tendon and also to offset unused paylo
Function and stability for support both, wet-tree and dry-tree
Allow for small Heave, Roll, Pitch
Tension-leg platform (TLP)
Component
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TLP is one of the two floaters which can support dry tree production syscomparison with the wet tree production system. The advantages ;
1. Higher production reliability.
2. Lower drilling and operation cost.
3. Less flow assurance risk and potentially higher recovery.
4. Direct vertical access for well intervention activity.
5. Minimal offshore construction.
Tension-leg platform (TLP)
Component
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Tension-leg platform (TLP)
Component
Topside
Hull system
Tendons
Riser
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Tension-leg platform (TLP)
Component
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Tension-leg platform (TLP)
Component
( )
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1.Erect 1st segment (bottom segment)
Tension-leg platform (TLP)
Component : Installation sequence
T i l l f (TLP)
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2. Hang-off on installation vessel side
3. Pick-up and Erect next segment (main body segment)
Tension-leg platform (TLP)
Component : Installation sequence
T i l l tf (TLP)
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4. Make-up connection between 1st and 2nd segment
5. Lower and hang-off
Tension-leg platform (TLP)
Component : Installation sequence
Merlin connectors Make-up tool
T i l l tf (TLP)
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6. Repeat until top segment is connected
7. Installation temporary buoyancy module (TBM)
Tension-leg platform (TLP)
Component : Installation sequence
6
7
T i l l tf (TLP)
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8. Hook-up tether to bottom receptacle on foundation
9. Fill TBM with air
Tension-leg platform (TLP)
Component : Installation sequence
T i l l tf (TLP)
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1. Position platform
2. Hook-up temporary wire to top of
tethers
Tension-leg platform (TLP)
Component : Platform Installation
Tension leg platform (TLP)
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3. Ballast down platform while pulling in
on winches
4. Guide the length adjustment joint into
the tether porches
5. At correct draught, level platform and
lock-off
6. De-ballast platform until proper pre-
tension is achieved
Tension-leg platform (TLP)
Component : Platform Installation
Tension leg platform (TLP)
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7. Remove the TBM and other auxiliary
equipment
Tension-leg platform (TLP)
Component : Platform Installation
Tension leg platform (TLP)
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Tension-leg platform (TLP)
Component
Tension leg platform (TLP)
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Tension-leg platform (TLP)
Component
Tension-leg platform (TLP)
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Tension-leg platform (TLP)
Component
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Tension-leg platform (TLP)
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Tension leg platform (TLP)
Structural Design and Design Criteria : Code & Standard
Tension-leg platform (TLP)
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Tension leg platform (TLP)
Structural Design and Design Criteria : Code & Standard
Tension-leg platform (TLP)
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•General
•Operational requirement
•Stability requirement
•Environmental criteria
•Design case
Tension leg platform (TLP)
Design criteria
Tension-leg platform (TLP)
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General
This requires that each phase of construction,
transportation, installation, and operation be
coupled with design environmental events
and associated allowable stresses and/or
safety factors.
Tension leg platform (TLP)
Design criteria
Tension-leg platform (TLP)
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Operational requirement
Design criteria dictated by operational
requirements should be reviewed during each
iteration of the design spiral.
Examples of such requirements
•Simultaneous drilling and production.
•Maintenance procedures and frequency.
Tension leg platform (TLP)
Design criteria
Tension-leg platform (TLP)
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Stability requirement
•Free floating condition
•Inplace condition
•Intact condition
•Damaged condition
•Weight and center of gravity determination
Tension leg platform (TLP)
Design criteria
Tension-leg platform (TLP)
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Environmental criteria
•Environmental criteria should be associated with
a recurrence interval of the response of the
structure
•Selection of the actual data needed should be
made only after consultation with both the
platform designer and
meteorological/oceanographic specialists
g p ( )
Design criteria
Tension-leg platform (TLP)
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Environmental criteria
•Mathematical models should be utilized to
develop the description of normal and extreme
environmental conditions
•All data used should be documented. The quality
and the source of all data should be recorded,
and the methods employed in developing data
into the desired environmental values
g p ( )
Design criteria
Tension-leg platform (TLP)
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Design case
•Project phase.
•System condition.
•Environment.
•Safety criteria
g p ( )
Design criteria
Tension-leg platform (TLP)
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Load type
•Dead load
•Live load
•Environmental load
•Inertial load
•Construction load
•Hydrostatic load
g p ( )
Design criteria
Tension-leg platform (TLP)
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g
Design criteria
Dead load (Approximate)
•Top side facility 5800 tons
•Deck structure 3400 tons
•Riser load 2400 tons
Tension-leg platform (TLP)
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Wind force
Design criteria
Steady wind fluctuating velocity
Tension-leg platform (TLP)
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Current force
Design criteria
Tension-leg platform (TLP)
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Wave force
Design criteria
Tension-leg platform (TLP)
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Drag coefficient
CD drag coefficient = 0.6 – 1.2
Mass coefficient
Design criteria
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Tension-leg platform (TLP)
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Structural Design and Design Criteria
Structural Design
Global Design Platform Design Tendon DesignFoundation
Design
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Structural Design and Design Criteria : Global Design and Ana
Tension-leg platform (TLP)
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Structural Design and Design Criteria
Flexible
Surge
Sway
Yaw
Rigid
Roll
Pitch
Heave
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Structural Design and Design Criteria
Tension-leg platform (TLP)
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Structural Design and Design Criteria : Environmental parame
to response
Tension-leg platform (TLP)
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The TLP hull structure is a stiffened plate structure with internal longitudina
girders, web frames, bulkheads and flats. Its major components usually inc
node, pontoon and tendon porches.
Structural Design and Design Criteria : Structural Design
Tension-leg platform (TLP)
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Structural Design and Design Criteria : Structural Design
Global structural strength analysis
The global structural strength analysis ishydrodynamic and structural analysis. The stren
includes static loads , quasi- static loads contrib
platform offset and dynamic loads.
Global structural fatigue analysis
Fatigue calculations involve statistical
data,structural modeling,stress response
Tension-leg platform (TLP)
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Structural Design and Design Criteria : Structural Design
Hull to topside connection and upper column frame an
Control load cases for the TOC(the top of colu
and UCF(Upper column frames) connections are iden
screening for all
• waves
• phases to maximize high stresses from global stren
Strength analysis and buckling checks are then pe
the detailed local model
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Structural Design and Design Criteria : Structural Design
Pontoon to column connection analysis
In general, conventional TLP structure has large
column spacing in order to satisfy the stability re
Pry/squeeze loads are typically the dominating lo
conventional TLP platform due to large column s
column height. The connections between pontoo
are heavily dominated by dynamic load and gove
strength and fatigue.
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Structural Design and Design Criteria :
Tension-leg platform (TLP)
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Structural Design and Design Criteria :
Tension-leg platform (TLP)
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Structural Design and Design Criteria :
Tension-leg platform (TLP)
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Structural Design and Design Criteria :
Tension-leg platform (TLP)
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Structural Design and Design Criteria :
Tension-leg platform (TLP)
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Structural Design and Design Criteria :
Tension-leg platform (TLP)
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Structural Design and Design Criteria :
Tension-leg platform (TLP)
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Structural Design and Design Criteria :
Tension-leg platform (TLP)
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Structural Design and Design Criteria : Tendon Design
Tension-leg platform (TLP)
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Structural Design and Design Criteria : Structural Design
Tension-leg platform (TLP)
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Structural Design and Design Criteria : Structural Design
Tension-leg platform (TLP)
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Structural Design and Design Criteria : Tendon Design
Tension-leg platform (TLP)
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Structural Design and Design Criteria : Tendon Design
Tension-leg platform (TLP)
St t l D i d D i C it i T d D i
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Structural Design and Design Criteria : Tendon Design
Tension-leg platform (TLP)
St t l D i d D i C it i T d D i
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Structural Design and Design Criteria : Tendon Design
Note : The Platform was further designed for a maximum lateral offset limited to 7% of
100-year hurricane conditions and to 10% of water depth with 1,000-year conditions
Tension-leg platform (TLP)
F d ti D i
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Type
•Pile & integrated template
•Pile & independent template
•Shallow
Foundation Design
Tension-leg platform (TLP)
Foundation Design
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Analysis pile template structure
•Template modeling
•Soil modeling
•Pile soil interaction
Foundation Design
Tension-leg platform (TLP)
Foundation Design
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Design pile template structure
Axial capacity
Foundation Design
Tension-leg platform (TLP)
Foundation Design
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Analysis shallow foundation
•Mudmat modeling
•Gravity template modeling
Foundation Design
Tension-leg platform (TLP)
Foundation
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Design shallow foundation
Uplift capacity
Foundation
DrainedUndrained
Consider only submerged weight F.S = 1.25
Consider both term F.S = 2
Tension-leg platform (TLP)
Foundation
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Design shallow foundation
Sliding capacity
Foundation
DrainedUndrained
F.S =1.5
Tension-leg platform (TLP)
Structural Design and Design Criteria : Riser Design
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Structural Design and Design Criteria : Riser Design
Riser design requires that the riser response
to the platform motions and the
environmental loads be obtained. Local
forces and moments derived from the
response analysis are then used for thedesign of the individual riser components.
Tension-leg platform (TLP)
Structural Design and Design Criteria : Riser Design
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Structural Design and Design Criteria : Riser Design
Tension-leg platform (TLP)
Structural Design and Design Criteria : Riser Design
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Structural Design and Design Criteria : Riser Design
Riser Design Activities
Structural Design and Design Criteria : Riser Design
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Structural Design and Design Criteria : Riser Design
Riser Design Activities
Structural Design and Design Criteria : Structural Design
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g g g
Tension-leg platform (TLP)
P-61 Tension Leg Wellhead Platform (TLWP)
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g ( )
P-61 TLWP Detail
Oil production capacity: 100,000 barrels/day;
Own capacity for electricity generation: 3 X 2000
External electricity capacity: Up to 35 MW receive
processing cargo;
Water depth: 1,200 m;
Living quarters: 60 people,
Total platform weight: about 23,000 tons.
Design life of 25 years.
Dry-docking
Tension-leg platform (TLP)
P-61 Tension Leg Wellhead Platform (TLWP)
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g ( )
Tendons and pilesTopsides
Engineering by
McDermott (Houston)
Constructed in
Singapore by Keppel
FELS
Fabrication pipe and
tendons by
Mcdermott’s
P-61 TLWP
Hull
Design by FloaTEC
(Houston)
Co
b
Tension-leg platform (TLP)
P-61 TLWP Model test
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Tension-leg platform (TLP)
P-61 Tension Leg Wellhead Platform (TLWP)
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Tendon porch
Tension-leg platform (TLP)
P-61 Tension Leg Wellhead Platform (TLWP)
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Construct
Tension-leg platform (TLP)
P-61 Tension Leg Wellhead Platform (TLWP)
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Topsides i
using th
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Tension-leg platform (TLP)
P-61 Tension Leg Wellhead Platform (TLWP)
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Technology
The combination of oil reservoirs with an API gravity ra
and 17, and being in deep water, makes developing th
one of the most complex projects ever conceived by P
several innovative solutions to be incorporated, includi
The TLWP model resembles a semisubmersible (SS),
vertical tendons to anchor it instead of the standard m
This technology means that the platform has a lower rallowing dry Christmas trees (well control valves), dep
of TLWP, rather than on the seabed, which is the case
FPSOs. The reason for using this alternative is to mak
intervene in the wells by using submerged centrifugal
Tension-leg platform (TLP)
P-61 Tension Leg Wellhead Platform (TLWP)
8/10/2019 Tension-leg Platform (Tlp) for Present
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The McDermott team was instrumental
support and executing the offshore traninstallation of the TLWP offshore Brazil
The project was carried out with signific
by Chevron to the TLWP design, const
Commissioning of the platform continue
the FloaTEC project team.
Derrick Barge 50 (“DB50”), a specialize
vessel, to install the tendons, McDermo
its offshore campaign without a single L
Tension-leg platform (TLP)
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Thank you