DNV GL to Class New Decommissioning Units Built by CMHI

China Merchants Heavy Industry (CMHI) and DNV GL have signed a Letter of Intent (LoI) for the classification of two multi-activity jack-up units.

Ordered by OOS Energy, affiliated with Netherlands-based Overdulve Offshore Services (OOS), these 96 m long units will be purpose-built for the decommissioning market.

Construction is scheduled to start later this year, the company noted.

“We are very pleased that OOS Energy and China Merchants Heavy Industry (CMHI) have chosen DNV GL as the classification partner for this project. We welcome OOS as a new customer for classification and highly value their trust in DNV GL. This project with CMHI marks the continuation of a very fruitful relationship, and we look forward to undertaking many more projects with CMHI in the future,” said Ernst Meyer, director of Offshore Classification at DNV GL – Maritime.

“We appreciate DNV GL’s solutions orientated approach and that their experts are service-minded, while never compromising on quality. Through this project, our relationship will become even closer and stronger. We look forward to working with DNV GL in the future, with more comprehensive cooperation for other ship type segments,”  Yao Rulin, general manager of CMHI (Jiangsu) added.

The two identical 4-legged, self-elevating multi-activity units (MAUs) will be used in decommissioning operations.

“This means that the MAUs will be equipped for light drilling operations to close wells. In addition, they can deconstruct the topside of an oil rig’s structure, and remove the jacket structure which goes right down to the sea floor,” explained Bas Veerman, business development manager Benelux at DNV GL – Maritime.

Two cranes, one with a maximum hook height of 92 m and one with a maximum hook height of 122 m above deck and a combined lifting capacity of 2,400 tons, can work in tandem to dismantle decommissioned offshore structures, lifting parts onto the MAU’s own deck, before transporting them back to shore.

The units will be self-propelled by four steerable thrusters, and are also equipped with a dynamic positioning system (DP2 system), ensuring safe positioning near the platform.