Available Existing Standards: API RP2 Series

Sean VerretPrincipal Engineer

Energo Engineering

Offshore Wind Energy Workshop Washington DCMarch 25, 2010

Existing Standards:API RP2 Series

Sean Verret - Offshore Wind Energy Workshop - Washington DC – March 25, 2010

Key Points

2

API Standards Background

Example Applications

Lessons Learned

Conclusion

Offshore Oil and Gas Caisson Structure

Offshore Wind Energy Caisson Structure

Existing Standards:API RP2 Series

Sean Verret - Offshore Wind Energy Workshop - Washington DC – March 25, 2010

API RP2 Series Primary Documents

3

Over 40 Years Experience

Primary Structural Standards

RP2A – Fixed (22nd Edition)

RP2T – Tension Leg

RP2FPS – Floating Production

First Offshore Platform

Deepwater Fixed Platform

Deepwater Floating Platform

Existing Standards:API RP2 Series

Sean Verret - Offshore Wind Energy Workshop - Washington DC – March 25, 2010

API RP2 Series Support Documents

4

Support Standards

2GEN (Pending) - General

2MET – Metocean

2EQ – Earthquake

2GEO - Geotechnical

2SIM – Structural Integrity Management

Special

2INT DG – Design Guide

2INT EX – Assessment of Existing

2HINS – Post Hurricane Inspection

Others

Existing Standards:API RP2 Series

Sean Verret - Offshore Wind Energy Workshop - Washington DC – March 25, 2010

Example Applications - Fixed

5

Fixed Structures Designed to RP2A

Versatile Design Approach

Loading

Metocean

Earthquake

Steel Design

Foundation

Material

Fabrication

Installation

Structural Integrity Management

Inspection

Assessment

Small Single Caisson

Big 4-pile Platform

Bigger 8-pile Platform

Existing Standards:API RP2 Series

Sean Verret - Offshore Wind Energy Workshop - Washington DC – March 25, 2010

Example Applications - Floating

6

Floating Structures Designed to RP 2T and RP 2FPS

Versatile Design

Loading

Metocean

Motions

Mooring Systems

Mooring Lines

Anchors

SPAR

TLP

FPS

Existing Standards:API RP2 Series

Sean Verret - Offshore Wind Energy Workshop - Washington DC – March 25, 2010

Lessons Learned

7

Hurricanes Ivan, Katrina, Rita, & Ike

Metocean

Hmax increase 70’ to 90’

Structural Damage

Details matter

Foundations

Caisson pile tip rotation

Wave In Deck Damage

Broken Connection Cracked Joint

Leaning Caisson

Existing Standards:API RP2 Series

Sean Verret - Offshore Wind Energy Workshop - Washington DC – March 25, 2010

Conclusion

8

40 Years of Experience - 22 Editions

Design

Foundation

Fabrication

Installation

SIM

Lessons Learned

Hurricanes

SIM 40 years in service, 1000’s of platforms

Full Suite

Fixed Structures

Floating Structures

Good reference basis for US Offshore Wind Energy Projects