Actinia

Rig:

Transocean Actinia Semi-Sub

Date:

February 1993

Location:

South Con Son Basin, Off Vietnam, South China Sea

Operator:

BP/Statoil

Summary

Built in 1982 by Hitachi Zosen at the Nagasu Shipyard in Japan, the Actinia semi-sub was originally owned by South Africa's Actinia Shipping before being hired out and eventually bought by Sedco Forex in 1997. She worked for BP in Vietnam, followed by service in Malaysia and Thailand for Total and Unocal before being moved to the Mediterranean in 1998.

In February 1993, the well being drilled by the Actinia encountered shallow gas and blew out, damaging the BOP and causing the rig to list by 15 degrees. The slick of ejected liquids measured up to 2 km wide. Reports state that the blowout subsequently killed itself, possibly by bridging.

Sources:

Torma PDF document
Petroleum History Society PDF document

See also:
Actinia blowout video on YouTube.

Photos
1. Canadian Wellsite