Rig: Nanhai V

Name Nanhai V
Owner China Oilfield Services Limited (COSL)
Manager China Oilfield Services Limited (COSL)
Rig Type Semisub
Sub Type Midwater Floater
Jackup Type --
Max Water Depth (ft) 1500
Max Drill Depth (ft) 25000
Dimensions (ft) 239 x 203 x 110
Leg Length (ft) --
Competitive Yes

Current Location

Country China (PRC)
Region East Asia

Drilling Equipment

Drawworks Type National Oilwell Varco ADS 30Q
Drawworks HP 3000
Mud Pumps Type National Oilwell Varco 12-P-160 Triplex
Top Drive National Oilwell Varco TDS-4S
Hookload Capacity (lbs) 1200000

Rig Construction Details

Rig Design Friede & Goldman
Rig Model L-945
Year Built 1983
Country of Build Norway
Yard Name Framnæs shipyard
Group Yard Name A/S Framnæs mek Værksted

Rig Contract Details

Operating Status Ready Stacked
Operator --


21 Jan 2016

COSL Completed a High-quality Workover Integrated Operation with a Semi-submersible Rig

China Oilfield Services Limited (“COSL” or the “Company”), has smoothly completed its first workover integrated operation with a semi-submersible rig, NH5 of the Company, in South China Sea waters. There were huge challenges for this workover operation stemming from the swinging trunk of the semi-submersible rig due to the winter monsoon in South China Sea. Guided by excellent environmental protection concepts, NH5 developed appropriate measures and cooperated closely with the partners and tackled difficulties in precision positioning of the equipment and seamless matching of the operation procedures. NH5 completed this workover operation smoothly, thereby established a solid foundation for the timely resumption of production of the well for the client. With this outstanding operation, NH5 has not only helped COSL generate revenue, but also won full recognition and endorsement with relevant praise from the client.

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