History: First MODU to Use Subsea Well Control
In 1955, the Western Explorer, owned by Chevron, is introduced in the Santa Barbara Channel as the first floating drilling MODU to use subsea well control. The unit, built by the CUSS group (Continental, Union, Shell, and Superior Oil (now Global Santa Fe)), measured 260 feet and had a 48-foot beam. It was retired in 1972.