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UK technology used in Chinese pipeline survey

27th November 2012

Sonardyne’s technology to be applied in Liwan 3-1 gas project for pipeline survey in South China Sea

UK technology used in Chinese pipeline survey
Liwan 3-1 is located in the South China Sea, 350 kilometres south-east of Hong Kong in an average water depth of 1,300 metres

A UK subsea technology provider will see its tools used in a pipeline survey in the South China Sea, as the country edges on the “best available technology” from the West to develop its energy sector.

Sonardyne will supply its GyroUSBL transceiver and two Ranger 2 underwater tracking systems to the Chinese arm of Dutch multinational company  Fugro N.V., China Offshore Fugro Geosolutions Co. Ltd (COFG), the UK company announced on Monday.

The move follows the pre-installation phase for the development  of the Liwan 3-1 gas field, in the South China Sea. The Chinese firm will be using Sondardyne’s Ranger GyroUSBL systems to conduct route surveys of the proposed 260 km gas pipeline using ROVs.

Ranger 2 calculates the position of a subsea target by measuring the range and bearing from a vessel-mounted Ultra-Short BaseLine (USBL) transceiver to an acoustic transponder on the target. The GyroUSBL to be supplied to COFG has a built-in Lodestar attitude and heading reference sensor which, Sonardyne claims, only requires the vessel to perform a simple ‘spin-test’ before subsea operations can begin.

“The Liwan 3-1 gas project is a challenging project requiring 260 kilometres of pipeline to be laid. In order to conduct the most precise survey with high accuracy results, we knew we needed the best available technology,” Qu YanDa, general manager at COFG said.

Liwan 3-1, discovered in 2006, is located in the South China Sea, 350 kilometres south-east of Hong Kong in an average water depth of 1,300 metres. First gas production is expected in late 2013.

 

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