“Key Technology of New Type Mid-Water Semi Submersible Drilling Unit”

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BT-5000 Mid-water Semi

Magnus Engström M.Sc. Naval Architect & Marine

Engineering

Agenda

• Background • Basis • BT-5000

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Bassoe Technology Brief Introduction

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BT-3500 BassDrill Beta at Papa Terra Helix Q-5000 at seat trial Atlantica Gamma at sea trial

Bassoe Technology - Overview • Engineering company with focus on marine

and offshore engineering – Design of semi’s and ship-shaped units – General marine and offshore engineering

services • Experienced team of engineers with

historical key-roles in a number of 6:th generation and floating production semi’s – Approx. 55 employees – Up to 50 additional consultants

• Located in Gothenburg, Sweden • Owned by CIMC (Yantai Raffles) but

independent and does also work with other clients/yards.

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Bassoe Technology - Timeline

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• Started late 2007 by Erland Bassoe and former management and key engineers with background from GVA-C • Bassoe group wanted to build up an engineering company to

assist in project development related to floating units • Acquired (90%) by CIMC – China International Marine Containers

• Sister company to CIMC Raffels (Yantai) and CIMC Capital • BT to remain independent and free to work with other yards but

when beneficial try to create synergies with sister companies

Stayed with GVA

Joined BassTech

90% CIMC 70% BassInvest

30% Employees

2007

24 Employees

~55 Employees

2013

10% BassInvest (Erland Bassoe)

Timeline/ Ownership

CIMC Offshore • CIMC Raffles

– Three yards in Yantai area – Offshore Engineering

Center – Bassoe Technology

• Main products: – Jack-ups – Semi-submersibles

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Bassoe Technology - Background:

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West Hercules

Visund

Thunder Horse

Atlantis GVA shipyard – Leading builder and designer of semi’s in the 80-ties

• Our heritage is from the GVA shipyard where many of our employees have had key roles in numerous prestigeous semi-submersible projects.

Regalia

• BassDrill Alpha, BT-LTB, Tender Barge - Lamprell – Concept and Basic Design – Operates in West Africa

• BassDrill Beta BT-3500 Tender Semi - DSIC – Delivered Q4-2013 – 1,500 day charter with Petrobras at Papa Terra

• Helix Q5000 DP3 Well-Intervention Semi - Jurong – Concept, Basic and Detail (partly) design – Delivery Q1-2015 from Jurong

• Atlantica Gamma, BT-HTB, Tender Barge - DSIC – Basic Design – Delivery Q4-2015

• BT-UDS drillship for Sigma Drilling - STX – Sigma Drilling (Skeie) contracted 1+4 at STX – Project cancelled due to STX finanical trouble – Basic design approx. 90% complete at termination

• Atlantica Delta, BT-3500 Tender Semi - DSIC – Basic Design completed – Delivery Q3-2015 – 42 months charter with Total for Moho Nord, Congo

• Etesco IX, BT-4000LWO Well-Intervention – DSIC – Design & Fabrication Ongoing – Delivery Q3-2016

Bassoe Technology – Contracted Units

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CIMC Offshore – Track Record: • Jack-ups:10 units delivered + 6 on order

• Semi-submeribles: 10 units delivered + 5 on order

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OEI & YCRO and BT in Yantai

• Objective & Goal (in brief)

– Initially, Strengthen relationship between OEI/YCRO and BT such as: • Over bridge culture differences and improve understanding of work methods. • Improve communications in projects and sales • Identify & Improve common areas of interest • Share Experiences & Resources, Add value to both companies

(Note, two parties with bad English, non native. Body language is 75% of communication)

– Forthcoming, Improve work and market activities • Improve concept work with the aim of a more efficient detail design and fabrication • Improve project work and act as liaison engineers, bidirectionally. • Together and as individual companies increase market window & sales • Investigate possible optimization in methods and tools

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BT-5000 Harsh Environment Mid Water Semi

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Basis & Reason

• Mid Water Semi - Initiated <2013 to renew existing old fleet

• Improve and develop a more effective, safe, environmental friendly solution and tools for the industry

• Concept is driven by low oil price • Competitive with other designs

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BT-5000 – Harsh Midwater Semi • Midwater Semi for harsh

environments – UK Shelf & Worldwide

• Alternative NCS version – Moored with thruster assist

• Self-contained 8-point mooring for waterdepths up to 500/610 m (UK/mild)

• Prepared for future 12-line system • Pre-set moorings up to 1,500 m

• Developed in cooperation with YCRO OEI with funding from CIMC – Intended for construction at YCRO

• YCRO OEI = Yantai CIMC Raffles Offshore Engineering Institute

– Basic design phase 2 ongoing 14

BT-5000 – Drilling Capabilities • Flexibility for Owner preferences for drilling

equipment and layout • Off-critical path preparations

– Off-line stand-building – Dedicated coiled tubing area – Wire-line area

• Base case is single derrick – 1,000 tons hook-load – Drilling depth up to 30,000+ ft – Derrick height 170+ ft (Triples)

• Conventional riser tensioners • BOP and X-mas tree handling flexibility

– Optional storage of second BOP stack – X-mas tree and subsea equipment handling

• Triple segregated mud-system • ROV areas integrated in deck-box

– Guidewires for launching/recovery 15

Slick-/Wire- Line area

Well-test area

Pipe-racks

Riser storgae

Coiled tubing area

X-mas tree handling

BT-5000 – Typical Drilling Equipment

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Sack store Exhaust pipes

X-mas tree handling

• 2,000,000 lbs derrick – Crown mounted compensator – One pipe-handling system – Off-line stand-building

• 1,000 sh tons topdrive – 60½” rotary

• 6,000 Hp drawworks • 8 x 200 kips wire-line tensioners • 4 x 2,200Hp 7,500psi mud-pumps

– Triple segregated mud system • BOP handling for 6-ram BOP-stack

– 450 tonnes SWL BOP trolley – BOP Overhead crane 2 x 225 tonnes

• Optional X-mas tree handling – Skidding system/ Overhead crane/ Fork-lift

• Riser gantry crane

BT-5000 - Characteristics

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• Midwater semi – Extremely good motions

characteristics – Good transit speed – CFD optimized hull with low current

loads • Moored with optional thruster assist

– DNV POSMOOR ATA / ABS TAM, Circle P,

– Up to 12 x 84 mm x 1,750 m R5 chain • 5,000 tonnes variable deck-load in

operation/survival – 49,500/44,100 tonnes displacement

• 160 persons accommodation

• 4 x 5,300 kW diesel generators • 4 x 3,500 kW @4.6 m thrusters

– Fixed pitch variable speed drive • High voltage power system

– 11kV/690V/440V/230V – 60 Hz • Optional DP2 (“light weather”) • 4 double (triple) windlasses • 4 x 85 men life boats • AW101 helideck • 2 platform cranes,

– 2 x 100 tonnes conventional cranes or 2 x 100 tonnes knuckle-boom cranes

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BT- 5000 – Typical Marine Equipment

Mud room ROV rooms

BT-5000 - Payload • The BT-5000 will have the

following payloads: Operation/Survival Norway Deck and Column Payload 5,000 tonnes Total Payload 12,000+ tonnes Transit Total Payload 4,000 tonnes (Based on 2,350 tonnes chain onboard, not included in the 4,000 tonnes).

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BT-5000 Motions and Workability

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Motions and Workability • BT has performed hull-form optimization for the BT-

5000 to provide excellent motion performance – Long term workability in harsh environments – Sufficient natural period for operations in areas with

presence of long swells • Workability analysis has been performed:

– Åsgard (Haltenbanken) wave scatter – Statoil motion limits for various critical operations – Water depth, 500 m – Reference units included for comparison

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Workability Comparison

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3.5% 13 days

BT-5000 Resistance/Drag

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Transit Speed/Resistance • Majority of semi-submersible

pontoon designs are without basic consideration of transit speed – Gusto DSS/Ocean series & F&G EXD –

Rectangular ends w/rounded corners – BT, GVA & Moss – Elliptical ends (w/wo

flat part) • BT has over the last year performed

external and in-house CFD (Computational Fluid Dynamics) studies to optimize pontoon geometry, which has resulted in significant resistance reduction.

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CFD of pontoon with elliptical ends

CFD of pontoon with optimized end

Transit Speed – CFD study • By selecting a correct pontoon

shape, a significant reduction in power and improvement in transit speed can be achieved

• A new pontoon end has been developed that has resulted in significant reduction in propulsion power over comparable semi’s: – 50% of original BT hull – 20% of GM-4000 – 60% of Ocean 500

• Further, with a trim by stern the resistance is additionally reduced.

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BT-New vs. BT Old

BT-New vs. Ocean 500

BT-New

BTOld

BT-New

Ocean 500

Current Load • The BT-5000 has been arranged

with rounded pontoon corners with large radius around the pontoons

• Although the drag reduction due to rounded corners is well-known, many modern semi are with sharp corners at the pontoon deck and small column corners – Gusto, Moss, GVA

• Due to the rounded corners at pontoon and column the BT-5000 will have similar current load as much smaller competing designs

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API RP2SK

BT-5000 Abt. 40%

Pontoon Drag – Incresae of radius

-13%

-40%

Pontoon Drag – 0, 1 and 2 radius

Contact details: Bassoe Technology AB

PO Box 11130, SE-404 23 Gothenburg, Sweden

Visiting address: Östra Hamngatan 17 Phone: +46 31 855 800

www.basstech.se mail@basstech.se

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