DNV GL Awards CMHI AIPs For Two New Offshore Designs

Classification society DNV GL has presented China Merchants Heavy Industry (CMHI) with Approval in Principle (AiP) certificates for two new offshore units: an arctic single column drilling unit and a wind turbine shuttle. The certificates confirm that DNV GL has assessed each of the two designs according to class rules and found no significant obstacles exist to prevent the concept from being realized.

SCDU_Design
Image Credits: dnvgl.com

DNV GL’s Head of Technical Centre China Falk Rothe handed over the two certificates to Dr. Lixin Xu from China Merchants Offshore Technology and Research Center (CM-OTRC). The management team and project members from CM-OTRC also joined the ceremony.

“CMHI and DNV GL have been partners in strategic cooperation for many years. Together, we both aim to not only set industry standards in ship and offshore unit designs, but contribute to safer and more environmental-friendly operation,” said Norbert Kray, DNV GL’s Regional Manager Greater China. “We are very grateful that CMHI have made us their first choice for classification services for these two projects and we look forward to strengthening our cooperation in the future.”

The arctic single column drilling unit (SCDU) consists of a round floater with an upper and a lower hull, an enclosed deckhouse, and a round footing. It is designed for well work-over, exploration, and development drilling operations in water depths up to 700m in moderate environments, including Arctic and sub-Arctic areas (open water and up to 1.5m ice thickness), moored by a 16-point mooring system.

WTS-small
Image Credits: dnvgl.com

The round conical shape of the strengthened hull structure is designed to deflect and break the ice, protecting the drilling riser and other equipment in the moonpool against level ice. DNV GL assessed the design according to a high-spec class notation string: 1A Cylindrical Drilling Unit(N) Crane-offshore(N) DRILL(N) E0 POSMOOR Non-self-propelled HELDK (S, H, N) DAT (-40) Ice(L) PC(5) Winterized(Polar, -45°C) BIS BWM(T) Clean(Design).

The wind turbine shuttle (WTS) was developed to install offshore wind turbines (OWT) at wind farms. Unlike other installation vessels, the WTS has a small waterplane area twin hull (SWATH) design. This results in very low resistance at the design draught (16m) and excellent seakeeping performance, good motion behaviour characteristics, and high transit speed of 14 knots.

Capable of transporting and installing two fully assembled wind turbines or two wind turbine foundations, the vessel has a highly redundant dynamic positioning system installed and the wind turbine hoist tackles are equipped with an active system to compensate for the heave motion of the vessel. The WTS can provide a “one-piece” installation service for OWT, as well as jacket foundations, piles, and other components. The design was assessed according to the class notations: 1A Column-stabilised Wind turbine installation unit Crane-offshore DYNPOS(AUTRO) E0.

Reference: dnvgl.com

Disclaimer :
The information contained in this website is for general information purposes only. While we endeavour to keep the information up to date and correct, we make no representations or warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability or availability with respect to the website or the information, products, services, or related graphics contained on the website for any purpose. Any reliance you place on such information is therefore strictly at your own risk.

In no event will we be liable for any loss or damage including without limitation, indirect or consequential loss or damage, or any loss or damage whatsoever arising from loss of data or profits arising out of, or in connection with, the use of this website.

Do you have info to share with us ? Suggest a correction

About Author

Marine Insight News Network is a premier source for up-to-date, comprehensive, and insightful coverage of the maritime industry. Dedicated to offering the latest news, trends, and analyses in shipping, marine technology, regulations, and global maritime affairs, Marine Insight News Network prides itself on delivering accurate, engaging, and relevant information.

Subscribe To Our Newsletters

By subscribing, you agree to our Privacy Policy and may receive occasional deal communications; you can unsubscribe anytime.

Web Stories

Leave a Reply

Your email address will not be published. Required fields are marked *