New Conept Under Test: Arctic Drillship

By Solange Van Derwerff
Monday, April 21, 2014
Solange Van Derwerff

When Ulstein Sea of Solutions (USOS) took part in a concept design competition for an arctic drillship, MARIN was asked to investigate the concept variations.
USOS was asked to participate in a concept design competition for a drillship  capable of operating in arctic conditions for several months a year. Special requirements are posed for the design of such a vessel due to the cold climate and the probability of encountering sea ice during operations.
Instead of making adjustments to a conventional drillship design, USOS developed a completely new concept dedicated specifically to the purpose of the vessel. Each aspect of the design was subject to a sensitivity study in order to assess the impact of particular parameters on the vessel design. Combining these design parameter sensitivities enabled MARIN to draw conclusions for the optimal ship design.
MARIN was involved in the design aspects related to the hull. The goal of the sensitivity study was to give qualitative insight into the station keeping performance of the vessel when considering various concepts. Each concept used a disconnectable turret and had dynamic positioning (DP) capability, but the position of the turret varied between the concepts. Evaluation of the mooring loads, the required thrust and the DP watch circle revealed the best turret positions for a range of environmental conditions.
Ice field in aNySIM
With the aNySIM tool, a time domain simulation was conducted whereby hundreds of particles represented a managed (pre-broken by icebreakers) ice field. A number of parameters were given to describe the severity of the ice conditions, including most importantly, the ice concentration (the fraction of the total area covered by ice) and the average ice floe (particle) size. An algorithm based on Voronoi Tessellation was used to obtain a set of ice particles that exactly complied with the specified parameter values.
All concepts were tested for their capabilities in the specific environmental conditions, evaluating four different vessel orientations with respect to the approaching ice field and for a blackout situation. Based on the results of these simulations, USOS could take an informed decision about the placement of the turret in the drillship. (USOS approved publication of their concept design test.)


The Author
Solange van der Werff is project manager at the Trials & Monitoring department of MARIN, the Maritime Research Institute Netherlands. 
e: [email protected] 
w: www.marin.nl

(As published in the April 2014 edition of Maritime Reporter & Engineering News - http://magazines.marinelink.com/Magazines/MaritimeReporter)

Maritime Reporter February 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Environmental

Congestion is Port of Long Beach’s Toughest Issue

Slangerup’s State of the Port address outlines goals for Energy Island, smarter supply chain   In his first-ever State of the Port address, Port of Long Beach

BOEM Issues Supplemental Environmental Impact Statement

The U.S. Department of the Interior, Bureau of Ocean Energy Management (BOEM), announces the availability of the Draft Supplemental Environmental Impact Statement

European Shipping Week Announces Speakers

Adam Goldstein, President and COO of Royal Caribbean Cruises, Pierfrancesco Vago, Chairman of CLIA Europe and Executive Chairman of MSC Cruises, and Paolo Tonon,

Naval Architecture

Naval EXPO Coming to Washington

For the first time ever, the general public will be admitted free to the Naval Future Force Science and Technology EXPO general exhibit hall Feb. 4-5 where they

Imabari to Build 20,000TEU Containerships

Imabari Shipbuilding Co., Ltd. announced it has secured newbuild orders with the cooperation of Marubeni Corporation for 11 units of 20,000TEU Ultra-Large Container Carriers,

SSI Launches ShipConstructor 2015 R2.1

SSI has today released ShipConstructor 2015 R2.1 software.   The software release comes in response to emerging ship design, engineering and building trends as

Vessels

MMEA Recover Hijacked Tanker

A hijacked Malaysian coastal tanker has been recovered by the prompt actions of the Malaysian Maritime Enforcement Agency (MMEA) off the coast of Malaysia. The

Scorpio Takes Delivery of STI Veneto

Scorpio Tankers Inc. has taken delivery of STI Veneto, an LR2 product tanker from Hyundai Samho Heavy Industries Co., Ltd. This vessel will begin a voyage for 60 days at approximately $32,

Imabari to Build 20,000TEU Containerships

Imabari Shipbuilding Co., Ltd. announced it has secured newbuild orders with the cooperation of Marubeni Corporation for 11 units of 20,000TEU Ultra-Large Container Carriers,

Offshore Energy

Barril Appointed COO of SBM Offshore

SBM Offshore is pleased to announce the appointment of Philippe Barril as Chief Operating Officer (COO) effective March 1, 2015.  Philippe's appointment as a

BOEM Issues Supplemental Environmental Impact Statement

The U.S. Department of the Interior, Bureau of Ocean Energy Management (BOEM), announces the availability of the Draft Supplemental Environmental Impact Statement

Europe's Offshore Wind Capacity Growing

New capacity edges down 5 pct from record 2013; industry body forecasts stable growth over 2015/6. Europe's offshore wind capacity kept up a steady rate of growth

 
 
Maritime Security Naval Architecture Navigation Pipelines Port Authority Salvage Ship Electronics Ship Repair Shipbuilding / Vessel Construction Sonar
rss | archive | history | articles | privacy | terms and conditions | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.2674 sec (4 req/sec)