DeepOcean MSV Volantis completes projects offshore China

Offshore staff

DARLINGTON, UKDeepOcean UK, a subsidiary of DeepOcean Group Holding BV, has completed Liwan 3-1 project work offshore China.

Liwan 3-1 is part of the Liwan gas project, located 300 km (186 mi) southeast of the Hong Kong Special Administrative Region, which also includes the Liuhua 34-2 and Liuhua 29-1 fields. All three fields share a subsea production system, subsea pipeline transportation, and onshore gas processing infrastructure.

DeepOcean began works on the project for COOEC Subsea in March 2012. Its MSV Volantis and UT-1, a free-flying jet trencher, conducted trenching and survey operations over 160 km (99 mi) of the 30-in. Liwan Pipeline that connects the Liwan Central Platform (CEP) in 200 m (656 ft) of water to the shore at China National Offshore Oil Corp.'s (CNOOC’s) Gaolan gas plant.

Prior to trenching, activities included construction work involving crossings along the pipeline route using WROVs and technicians onboard the Volantis to deploy over 100 mattresses along the pipeline in preparation for the lay campaign. Trenching activities with the UT-1 and dedicated crew achieved burial depths along the route to 2.5 m (8 ft) below the seabed for the large-diameter pipeline.

Upon completion of trenching in August 2013 in the shallow-water section of the project for COOEC Subsea, the Volantis was contracted by Saipem to perform subsea field development activities in the deepwater section of the Liwan 3-1 field, operating ROVs in excess of 1,400 m (4,593 ft) of water depth.  



Did You Like this Article? Get All the Energy Industry News Delivered to Your Inbox

Subscribe to an email newsletter today at no cost and receive the latest news and information.

 Subscribe Now


Logistics Risk Management in the Transformer Industry

Transformers often are shipped thousands of miles, involving multiple handoffs,and more than a do...

Secrets of Barco UniSee Mount Revealed

Last year Barco introduced UniSee, a revolutionary large-scale visualization platform designed to...

The Time is Right for Optimum Reliability: Capital-Intensive Industries and Asset Performance Management

Imagine a plant that is no longer at risk of a random shutdown. Imagine not worrying about losing...

Going Digital: The New Normal in Oil & Gas

In this whitepaper you will learn how Keystone Engineering, ONGC, and Saipem are using software t...