Download - Offshore access gangway

Visit Shell E&P to Ampelmann

Rotterdam, August 24th 2009

AMPELMANNOffshore access as easy as crossing the street

July 2002

• Conference on wind energy

• A presentation on access

• Design something better• Design something better

• An invention needs a codename: Ampelmann

“Offshore access, as easy as crossing the street”

The problem

The solution

Demonstrator phase

• 2 meter stroke cylinders

• Offshore proof

• Design for safety

• Test in offshore environment

• Design:

Hs = 2.5m, 50m vessel à no motions

The Ampelmann

Offshore testing

Transfer succeeded!

Operational experience: P14-A

• Removal

• Operator: Wintershall

• Client: SMIT Marine Projects

• Vessel: Taklift 4• Vessel: Taklift 4

• Dutch HSE demand:

“Use safe gangway!”

P14 removal

As easy as crossing the street…

Topside lift on 5th of June

P14 statistics

• Maximum transfer wave height (visual): Hs = 2.8m

• Maximum wind speed: 7 Bft

• Transfers: 750• Transfers: 750

• Landings: 170

Brunei Shell Petroleum - Operations

As easy as crossing the street…

Brunei Shell Petroleum - Evacuation

•Gangway stays outside vessel

•Speed up transfers

•Access crew via stair on wheels

•Onshore induction:

•68 pax in 18 minutes

Evacuation drill: 45 people in 10 min

Brunei Shell Petroleum - Operations

• Maximum transfer wave height : Hs = 1.2m Hmax = 1.8

• Evacuation drill: 45 people in 10 minutes

• Access within 15 minutes of choosing the landing zone

• Transfers: 730

• Landings: 85

• Locations: 3

Access testing Oil & Gas

Mobilization 3 weeks ago

• Jumbo Javelin

• Turbine installation

Last week: trial in UK

Safety & Certification

Safety

• Core mission: fail-safe and hazardous free design

• Extensive applied safety management systems: - Failure Mode Effect Analysis- Hazard Identification (HAZID)*

Certification

• Fabrication survey: Lloyd’s Register

• Load test: Lloyd’s Register

• Design Appraisal: Lloyd’s Register

*In cooperation with: Shell, Lloyd's, Staatstoezicht op de Mijnen & Smit

FMEA

• Component level “what if”

• Reduction to basics

• Redundant units where critical:

• Hoses• Hoses

• Valves

• Computers

• Power packs

• Sensors

ASMS

• Ampelmann Safety Management System

• Failures: green, yellow, orange, red

• No warning to crew à continue

• Use traffic light

Alarm

• RELAX

• On tip: step off

• On gangway:• On gangway:

• Stand + hold on

• Wait for the operator’s orders

Transfer safety

• No connection à pressure outward (200kg on structure)

• All hydraulics à free floating

• Possible disconnecting from main power

Landing options (10 different structures)

Free floating

Cylinder designMechanical design:

• Worst case safety factor > 2.8

• No lock-up: hinged connections

Cylinder design

Manufacturing:

• Certified material & manufacturing

• Pressure test: 350 bar

Cylinder design

Operations:

• Redundant actuation: valves, sensors, PLC

• Filters on pilot & pressure oil

Workability on support vessels

Anchor handler25m, Hs = 2.0m, 85%

Multi purpose vessel50m, Hs = 2.5m, 93%50m, Hs = 2.5m, 93%

Offshore Supplier 70m, Hs = 3.0m, 97%

In blue the percentage of operability in the Southern North Sea

Installation on vessel

• Installation less than 8 hours

• Welded on deck

• Stand alone system: •

• Own power supply

• Fits on any vessel or barge

Continuous access

• Container top fitting

• Sliding rail

• Pivot and slew

• Ball-bearing on• Ball-bearing onMercedes frame

• Normal gangway (10m)

“Slideway”

“Slideway” on Belait Barakah (center)

DP envelope

Ampelmann II

Grand opening 15 May

Improvements Ampelmann II

• More piping instead of hoses

• Moving hoses on the inside

• New design bottom frame


• Max length increased: 15 à 20m

• Weight reduction: 4t à 2t

• Telescoping cable pulley system


• Redundant control cabinets

• Redundant motion sensor and safety PLC


3m freeboard 3m

5.2m lowest point above sea level 2.4m

13.8m highest point above sea level 14.8m

8.6m total range 12.4m

Solution for fast crew boats

Offshore Wind: O&M

The Ampelmann – Workability on vessel

Workability depending on

• RAO’s of the vessel

• Location of the Ampelmann on the vessel• Location of the Ampelmann on the vessel

• Heading of the vessel

• Sea state

Trial SNS pool

• Operators interested: Total, NAM, Wintershall, BP

• Planning: one week testing in October

• Test objective very clear: we want to cross people onto different platformsdifferent platforms

Offshore access…

As easy as crossing the street