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: s.v.d.werff@marin.nl 
w: www.marin.nl

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

Maritime Today


The Maritime Industry's original and most viewed E-News Service

Maritime Reporter February 2016 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Environmental

Brazil's CEEE to sell stakes in Wind Farms, Dams

Brazil's Companhia Estadual de Energia Elétrica (CEEE), a power utility controlled by the state of Rio Grande do Sul, will sell assets including stakes in wind farms,

Submarine Tourism in Turkey's Waters

The first tourist submarine in Turkey is waiting to be sent on a voyage that will reveal the wonders of the undersea world of the Mediterranea.   The first submarine

Cautious Optimism on Pacific NorthWest LNG Report

Canadian Environmental Assessment Agency (CEAA)  has ruled that Pacific NorthWest LNG’s project in British Columbia would likely harm harbour porpoises and contribute to climate change,

Naval Architecture

BAE Systems Awarded £201m to Advance Successor Sub Design

The U.K. Ministry of Defence (MoD) has awarded BAE Systems £201 million to further the design of a successor to the Royal Navy's Vanguard class submarines.   The

The Next Generation of Hull Performance Management

Hull performance monitoring solutions can offer significant fuel savings potential, a fact that is prompting growing interest from the maritime industry. To spur

GTT, DSME Partner for NO96 Max Development

GTT signs a cooperation agreement with Daewoo Shipbuilding & Marine Engineering aiming at the industrialization of its NO96 Max technology   GTT, a designer of

Vessels

Hapag-Lloyd Enhances Conosur Service

Hapag-Lloyd has informed about its service enhancements on the Conosur Service (South America West Coast to South America East Coast). This is being upgraded by

Submarine Tourism in Turkey's Waters

The first tourist submarine in Turkey is waiting to be sent on a voyage that will reveal the wonders of the undersea world of the Mediterranea.   The first submarine

Nordana Sea Delivered to Symphony Shipping

After successful sea trials, M.V. Nordana Sea was delivered to Symphony Shipping on February 11, 2016. Constructed by builder Ferus-Smit in the Netherlands (yard number 419),

Arctic Operations

Helsinki, Tyumen State Universities to form Arctic station

Within the framework of the international project Reeh, Tyumen State University in cooperation with the University of Helsinki are planning to create a unique Arctic observation stations.

U.S. Okays ConocoPhillips Alaska LNG Exports

The U.S. Department of Energy approved ConocoPhillips' application to export about 40 billion cubic feet of natural gas from its Kenai liquefied natural gas export

IOCs Stress on OSV Fuel Management Performance

Growing insistence by international oil companies (IOCs) that oilfield contract vessels (OSVs) are fitted with fuel monitoring systems has prompted an upsurge in

Offshore Energy

Premier Oil and Rockhopper Abandon Ocean Rig Contract

Two of the major British players in Falkland Islands offshore oil development, Premier Oil and Rockhopper Exploration, cancelled a joint venture contract with Ocean Rig UDW.

US Oil Drillers Cut Rigs to Least in 6 Years

U.S. energy firms this week cut oil rigs for an eighth week in a row to the lowest levels since January 2010, data showed on Friday, as energy firms continue to

Eni, Exxon, Statoil Win Irish Offshore O&G Licences

The Irish government said on Thursday it had awarded oil and gas licences to companies including oil majors Eni, Exxon and Statoil , allowing them to explore for hydrocarbons off the coast of Ireland.

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Standards Naval Architecture Navigation Pipelines Pod Propulsion Port Authority Ship Repair Sonar
rss | archive | history | articles | privacy | 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: 0.1294 sec (8 req/sec)