Bundles and towed installation

Bundles and towed installation

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TOWHEAD STRUCTURES

TOWHEADSTRUCTURES

TOWHEAD STRUCTURES

ƒ Britannia bundle towhead ƒ Incorporates two subsea isolation valves (SSIVs) ƒ ~170 tonnes ƒ Temporary buoyancy tanks ƒ Overtrawlable?

If bundles can incorporate other subsea structures or equipment, it can make them more cost- effective. The above picture shows the Britannia towhead containing two subsea isolation valves (SSIVs). It is a gravity-based structure weighing 166 tonnes (183 US tons). It is located near the Britannia platform with a separate umbilical to operate the valves. Although protected by a frame with this intention when launched, the structure really cannot be regarded as being overtrawlable.

TOWHEADMANIFOLD