Presentation on theme: "FPSOs : NO TWO ALIKE F P S O P AST I SSUES AND T YPICAL C LAIMS Houston Marine Insurance Seminar - September 2012 Ted Miller, Charles Taylor Adjusting."— Presentation transcript:
FPSOs : NO TWO ALIKE F P S O P AST I SSUES AND T YPICAL C LAIMS Houston Marine Insurance Seminar - September 2012 Ted Miller, Charles Taylor Adjusting – Houston EJM 21 Aug 1022
Review and Discussion Points 1. The early days (80s): FPSOs local conversions from existing tanker hulls 2. The condition of some early FPSO Tanker hulls and hull prospects 3. US GOM Fleet 4. Manufacturing issues 5. Mooring line issues 6. Umbilical Issues 7. Flexible Riser issues 8. Hull Issues 9. Topside process system issues 10. Loss of station keeping - major event 11. Repair and remediation costs 12. Wrap up
Zafiro Producer Early FPSO Conversion in Galveston and Portugal Major ballast tank, bottom and steelwork repairs. Operated Offshore Equatorial Guinea 1996
Jamestown – FPSO Early Production System - Kewit South Texas Minimal hull repairs, built 1957 41,500 dwt.– heavy scantlings. Early Production Vessel
Condition of tanker hulls for conversion
Condition of Tanker as FPSO conversion candidate is Critical
Extract :Australian Transport Safety Bureau Findings The Kirki carried all necessary statutory safety certificates. Safety surveys had been carried out within the schedules required by the relevant international safety conventions. The scheduling of the Kirki's special five-year survey at 22 years, rather than at 20 years, was consistent with the ship's survey program and within the rules covering the frequency of special surveys. The defects in the life-saving appliances, fire-fighting equipment, cargo equipment and the condition of engine room equipment were so numerous and of such a nature that the Inspector cannot accept that they all developed over a short period of time. The patching with canvas and the camouflaging of No7 tank lids was a deliberate attempt to mislead any person undertaking a load line survey. It is not possible to determine when the lids were patched, and it might not have been done with the knowledge of the owners or those on board the Kirki on 21 July 1991. Significant defects should have been observed during surveys by Classification Society; inspections by the Oil Major Vetting and the Vessel managers and operators; and inspections by the Port State Maritime Safety Authority. The Classification Society was responsible for the issue of statutory certificates on behalf of the Hellenic Republic of Greece. The procedures adopted by the Society during structural surveys failed to identify the areas of localised corrosion. The condition of ballast tanks 13 and 14 together with the number and nature of deficiencies in safety equipment, indicates that a number of surveys over a period of time, including surveys that were conducted under international safety conventions, were not performed effectively.
U S GULF OF MEXICO FLEET U. S. GULF OF MEXICO FPSO FLEET Single FPSO Unit Multiple moored FPUs
US Gulf of Mexico HELIX PRODUCER 1 Converted Ferry – Croatia in 2008 Ship Shaped Floating Production Unit FPU Topsides installed Corpus Christi Texas 2009 Disconnectable Transfer System - DTS Operating Water depth 2,100ft Deployed at Green Canyon 237 Phoenix Field (Ex Typhoon)
US Gulf of Mexico BW Pioneer Converted in China and Singapore in 2010 Originally Double Hull 1992 Tanker First FPSO – Disconnectable Operating Water depth 8,200 – Ultra Deepwater) Deployed at Walker Ridge 249 Cascade and Chinook Fields
World Record Polyester Mooring Depth 12 (11+1 spare) lengths x 2.5km long x 800 tonne MBL Polyester Tethers. This is a new world record for continuous lengths of polyester mooring tether.
MANUFACTURING ISSUES Modern analytical tools – get design / specifications right Reliant on manufacturers to produce to spec. and codes Operators however rely on QA-QC of manufacturers and suppliers Onsite inspections by operator essential Reliance on 3 rd party Inspectors Small issues – catastrophic events
MOORING LINE ISSUES Many different designs, layouts and materials More incidents likely as FPSO systems age Chain lines – Steel Wire Rope lines – Steel Synthetic fiber rope lines – Polyester Shackles, Links and Jewelry - Steel Relatively few manufacturers of large diameter mooring components worldwide.
Steel Mooring chains and equipment
A chain system is only as good as its weakest link
Catastrophic Failures in Mooring Systems Possibly Put Floating Structures at Risk In early 2011, a single point mooring system for a deepwater Gulf of Mexico (GOM) project failed at the chain. Based on the investigation of this event and a review of historical events, BOEMRE is revising and re-issuing Safety Alert #259. The investigation determined that a 6 ¾- inch diameter, 862-pound chain link in the tether chain had fractured and separated near its butt weld. Analysis of the fracture indicated that the chain link had a weld repair and the fracture initiated in the middle of the weld. Three links of the 24- link tether chain were found to have weld repairs.
Mooring Line Failure - 2 Brittle fracture caused by reversible temper embrittlement (RTE) during shackle heat treatment
Tear in steel wire line sheathing g
FPSO Sheathed steel wire rope Mooring Line Installation vessel deployment line damaged HDPE coating on mooring line, exposing wire Can the cathodic protection reserve cope over life cycle - No Cost Can local repair be carried out – Minimal cost Must the rope to be replaced. – Very expensive repair.
Polyester Mooring Ropes 9 Diameter Polyester outer sheath Main Strands 8 triple 1-1/2 4RH Lay and 4LH Lay Strand Ends being Prepared for Splicing Strand ends being prepared for splicing Eye to Link
Other mooring line Issues Chain to Rope Transition Link misassembly which caused damage to one link and line: Are the other 9 links and lines damaged if their links wrongly assembled? Deepwater and Ultra DW - Lead Time for replacement components Very limited manufactures, propriety information, installation spread availability, unique designs, new engineering for repair procedures, timing and logistics
Damage due to design detail and unexpected delay
Hull Issues External Hull Sacrificial - Anode Loss in Transit Paint peeling on side shell – Damage or Warranty Ship Hull Bilge keel damage Cause under investigation Sterntube seals leaking – Damage or maintenance issue
Topside Industrial Process Systems Gas Turbine Gas generator blade - Accelerated Corrosion Flare Tower insulation loss – manufacturing defect Blade keeper parting FPSO off India – OEM Facility in USA Multiple Gas Turbines to OEM in Houston Compressor module FPSO North Sea - although built and installed as module repairs required entire compression unit to be removed – Massive increase in repair cost
Gas Turbine – Gas generator blade damage Hot corrosion caused by combination of sodium & sulphurHot corrosion caused by combination of sodium & sulphur Sulphur from high sulphur dieselSulphur from high sulphur diesel Sodium from seawater – air intakes ingest spray.Sodium from seawater – air intakes ingest spray. Question on other units :Question on other units : Aggressive deposits form before blade material corrodesAggressive deposits form before blade material corrodes Is contamination damage &/or is dismantling, cleaning, rebuilding & retesting covered ??Is contamination damage &/or is dismantling, cleaning, rebuilding & retesting covered ??
Fire on gas compression module Entire unit has to be removed for repairs
Loss of Station keeping FPSO with central turret / drag chain system FPSO thruster operation is required to maintain heading Multiple risers umbilicals / flowlines Failure of heading / station keeping & mooring systems Brief electrical power failure Excursion beyond dynamic riser & umbilical operating limits
First FPSO Full Field Development Gryphon North Sea 1993
Loss of Station keeping - Major Event Extensive damage to risers, subsea facilities and turret Extended repair period due to specialist equipment FPSO has to be removed to drydock for repairs Field restoration expensive Very large LOPI Claim - well in excess of the Physical Damage
Costs - Construction Examples Costs - Construction Examples Flexible Riser Failure 9,000,000 - 25,000,000Flexible Riser Failure 9,000,000 - 25,000,000 Mooring Line Failures 17,000,000 - 52,000,000Mooring Line Failures 17,000,000 - 52,000,000 Turret Weld Failures 12,000,000Turret Weld Failures 12,000,000 Bilge Keel Cracks 20,000,000Bilge Keel Cracks 20,000,000 Thruster Seal Failure 12,000,000Thruster Seal Failure 12,000,000 Fire Main Leaks 6,000,000Fire Main Leaks 6,000,000 Turbine Corrosion 5,000,000Turbine Corrosion 5,000,000 Anode Failures 10,000,000Anode Failures 10,000,000
Costs - Operating Examples Costs - Operating Examples Loss of Submerged Mooring Buoy 2,000,000Loss of Submerged Mooring Buoy 2,000,000 LOPI 100,000,000 Loss of Station Keeping 300,000,000 Loss of Station Keeping 300,000,000 LOPI 500,000,000 Fire in Gas Compression Module 20,000,000 Fire in Gas Compression Module 20,000,000 LOPI 150,000,000 Failure of Quick Disconnect Turret 25,000,000 Failure of Quick Disconnect Turret 25,000,000 LOPI 250,000,000