Offshore Structural Engineering to PM
-
Upload
thongchai007 -
Category
Documents
-
view
45 -
download
3
description
Transcript of Offshore Structural Engineering to PM
-
Overview of Offshore Structural Engineering for Project Management
16 August 2011
-
Footer can be customized2
TABLE OF CONTENTS
1. INTRODUCTION
2. PLATFORM TYPES
3. FIELD LAYOUT
4. PLATFORM TERMINOLOGY
5. FIXED OFFSHORE PLATFORM DESIGN
6. INFORMATION FLOW
-
1. INTRODUCTION
Proposed : To support Oil & Gas facilities, i.e., Production, Export of Liquid and Gas, Drilling and Living Quarter.
-
1. INTRODUCTION
Petrochemicals- Methanol- Ammonia- Hydrogen
Onshore &offshore
Steam cracker
(Ethylene)
Associated Gas &
Non Associated Gas
Regional consumers
-Power plant-Fuel gas
Liquefaction
GTL
C5-12
C5-20
Gas Processing Plant
Methane (C1)
Ethane (C2)
C3/C4
Gasoline
Condensate
LPG
Reinjection compressors
Onshore Oil & Gas Field Facilities
Offshore Oil & Gas Field Facilities
CO2 WaterSulphur
-
2. PLATFORM TYPES
Fixed PlatformFloating PlatformSubsea
-
3. FIELD LAYOUT
Fixed Platform Field Layout (Sample)
-
3. FIELD LAYOUT
-
3. FIELD LAYOUT
Floating Platform Field Layout (Sample)
-
3. FIELD LAYOUT
-
10
4. TERMINOLOGY
-
11
4. TERMINOLOGY
Jacket / Sub-structureLegHorizontal framingConductor framingCanKnee bracesSea deck walkway
ConductorsCurvedStraight
PilesThrough legPile cluster / Skirt PileBatter v/s straightGrouted v/s ungrouted
-
12
4. TERMINOLOGYMiscellaneous and Appurtenances
Risers and clampCaissons / casingsBoatlandingBarge bumper / fenderJ-tubeFlooding / grouting tubeLaunch cradleMudmatAnodes
-
5. FIXED OFFSHORE PLATFORM DESIGN
Code and StandardWeight ControlStructural Analysis and DesignStructural Software
-
1Code and StandardStructural Design must comply with the following Code and Standard :
International Code and StandardAmerican Petroleum Institute (API), International Standard Organization (ISO), American Institute of Steel Construction(AISC), American Welding Society (AWS)
Local Government Regulation
Department of Mineral Fuels, (, ) Owner Specification
Chevron (CES), PTTEP (TOTAL and Arthit), etc.
Classification Body Specification, if requiredAmerican Bureau of Shipping (ABS), Det Norske Veritas (DNV), Lloyds Register of Shipping, Bureau Veritas (BV), Germanisher Lloyds
Warranty Surveyor Specification(Insurance Company for Temporary Phase)
-
1Weight ControlPurpose :
For monitoring the weight and centre of gravity (C.O.G) of all component parts of a platform
Platfrom weight and Center of Gravity (CoG) is Critical for:
Fabrication and LadoutCapacity of support foundation during fabrication Loadout reaction to confirm loadout equipment and skid beams
Offshore InstallationCapacity of sea transportation and offshore lifting barge/vessel
Platform Operating ConditionBenchmark of platform weight and CoG for structural integrity check
Estimation of Weight and CoG is usually confirmed through Weighting before Loadout
-
2Weight ControlContingency and Tolerances :
Expressed in terms of a percentage of Base Weight are to allow for weight changes due to the uncertainty of the data, lack of design or final selected vendor data.
Sample of Contingency and Tolerances Percentage
-
3Weight ControlResponsibilities :
Lead Structural EngineerAssign weight control engineer on the projectInterface, co-ordinate and collect weight data from discipline
Weight Control EngineerResponsible for recording and compiling the weight and centre of gravity
information from all disciplines for generating the weight report
Lead Discipline EngineerResponsible for providing all the necessary information including the weight and COG information of items associated with their disciplines
Updating weight and CoG information
-
1Structural Analysis and DesignDesign Loading :
Dead Loads (Gravity)- Self weight (Computer generated)
- Miscellaneous Dead Weight (Hand-Coded)
- Equipment, Piping, Instrument and Electrical Dead Weight
- Internal Flood water
- Buoyancy
Live Loads (Movable or Changeable)- Content in Vessels, Equipments and Piping- Storage- Personnel- Crane Lifting weight- Helicopter- Tender Assisted Drilling Rig- Well Servicing Load
Open Area Live Load
-
2Structural Analysis and DesignDesign Loading :
Operating and Storm Condition
Environmental Loads- Water Depth and Tidal Variation
- Wave
-Current, i.e., Wind Generated and Tidal
- Wind
- Additional Wave Load- On appurtenance item, i.e. anode
- Marine Growth
- Wave slamming
- Snow/Ice
- Earthquake
-
3Structural Analysis and DesignDesign Loading :
Accidental Loads- Boat Impact
- Fire
- Explosion / Blast
- Drop Object
- Accidental Flooding
Pre-Service Loads- Motion Force- Mating Load
-
4Structural Analysis and DesignStructural Analysis :
In-service Conditions- In-place
- Dynamic
- Fatigue
- Non-linear Pushover
- Seismic
Pre-service Conditions- Loadout- Transportation- Lifting- Launch - Floating- Upending- On-bottom Stability- Pile Stick-up & Drivability
-
1Structural Analysis and DesignStructural Software : SACS
Global Response determined from Finite Element Analysis- Usually sufficient with 2-noded beam element
Computer program will automatically- Generate Gravity and Environmental Loads- Consider non-linear pile-soil interaction
- Perform topside and jacket memberand joint code check
- Calculate Pile UC and Safety of Factor
-
2Structural Analysis and DesignStructural Software : USFOS
Non-linear structural analysis, i.e., Pushover, Fire and Blast, Non-linear Seismic Time History
-
3Structural Analysis and DesignStructural Software : MOSES
- Barge Stability
- Transportation
- Floating, Launch and Upending
-
4Structural Analysis and DesignStructural Software : NASTRAN
- General Finite Element Analysis (FEA)
Local Analysis of Connection FEA of Pile Cluster
Structural Software : GRLWEAP- Pile Drivability
-
5Structural Analysis and DesignStructural Software : BOCAD
- 3D Structural model
- 2D drawings
- MTO
- Cutting Plan
-
6Structural Analysis and DesignStructural Software : PDMS
- 3D Structural model
- Clash Check
- Weight Take off and CoG
-
6. FLOW OF INFORMATION
O
f
f
s
h
o
r
e
S
t
r
u
c
t
u
r
a
l
Flow of Information during Execution Stage
DeliverablesRequired Information
ClientCompany SpecificationsCompany Reference/Standard DrawingsSite Environment DataGeotechnical/Soil Data
Internal Information
Piping Plot Plan / Equipment LayoutMechanical Equipment List and weightE&I Equipment List and weightSafety Drop object, Fire and Blast study
Vendor DrawingEquipment Dimension and weight
Drawing
General Note and Standard Drawing Topside DrawingsJacket & Pile DrawingsDemolition DrawingsOffshore Installation Sequence Drawings
3D BOCAD model3D PDMS model
Document and Report
Basis of DesignProject SpecificationWeight Control ReportDesign Calculation Report
Other DocumentsSite Survey ReportMTOBOM
-
www.technip.com
Thank you