West of Shetland pipeline

WOSP is owned collectively by the owners of the Schiehallion, Loyal, Foinaven and East Foinaven fields; each owner company holds divided capacity rights in accordance with its ownership interest. It is operated by BP.

The system consists of a 20-inch (510 mm) trunkline which begins near Schiehallion and has length of 188 kilometres (117 mi).^[2] It has a maximum capacity of 1.8 billion cubic metres (64 billion cubic feet) of gas per year.

Natural gas from the Clair field is delivered into the pipeline at the Clair tee midway along the pipeline 105 kilometres (65 mi) from Sullom Voe.^[2]

Natural gas from WOSP is further transported by East of Shetland Pipeline (EOSP), NLGP and FLAGS/SEGAL systems for the delivery into the UK National Transmission System at St Fergus in the northeast of Scotland, and for the delivery of separated natural gas liquids into either the Shell operated SEGAL system or the onshore section of the BP-operated Forties pipeline system.^[2] The gas delivered from the pipeline is also part of the Magnus oilfield enhanced oil recovery scheme where gas and natural gas liquids are piped to the Magnus platform and injected into the reservoir to increase the recoverable reserves from the development.^[3]