Drilling Rigs - Semi-Submersible
A Semi-submersible platform or rig, is a mobile structure used for drilling for oil and natural gas in offshore environments. Their superstructures are supported by columns sitting on hulls or pontoons which are ballasted below the water surface. They provide excellent stability in rough, deep seas. Semi-submersible rigs can be moved from place to place; and can be ballasted up or down by altering the amount of flooding in buoyancy tanks; they are generally anchored by cable anchors during drilling operations, though they can also be kept in place by dynamic positioning. Semi-submersibles can be used in depths from 600 up to 35,000 feet (180 to more than 10,600 m).
Discharging a heavy lift at Ninian South from Maersk Forwarder
Heavy lift being sent up to Ninian South from Maersk Forwarder
Ninian Northern pic taken from Maersk Forwarder on 15/07/2016
Crew change on the Janice A pic taken from Maersk Forwarder on the 21/07/2016
Ninian Southern pic taken on 15/07/2016 from Maersk Forwarder
Janice A with the dive ship Seven Pelican. Pic taken from the Maersk Forwarder 29/07/2016
Janice A deballasted on the 05/08/2016. Pic taken from Maersk Forwarder
Ninian Central flare boom. Pic taken on the 15/07/2016 from Maersk Forwarder
Ninian Central on a nice calm day. Pic taken on 16/07/2016 from Maersk Forwarder
North Sea Pioneer off Takoradi (Ghana) picture taken from Maersk Assester Feb 2010
Siem Louisa (PSV) discharging riser to the Transocean Marianas. Offshore Ghana Feb 2012.
Floatel Victory in Singapore. Picture taken from Maersk Logger October 2013.