Olso-listed Songa Offshore says its rig Songa Venus achieved operating efficiency of 100% in May - and the rig is operating for Shell Australia offshore North West Australia.
Songa Offshore added that its Songa Mercur has achieved operating efficiency of 99% in May.
The rig continues its work for Santos offshore North West Australia.
Elsewhere, in its rig update, the company said Songa Saturn achieved operating efficiency of 99% in May.
The rig continues to operate under the Nippon-led consortium contract in Libya, and has started on the third out of four firm consortium wells, this time for Petrobras.
Also performing well was the Songa Delta, which achieved operating efficiency of 99% in May.
It finished its contract working for StatoilHydro at the Tune Field on May 26, and had an immediate start up for Wintershall/ Det norske oljeselskap.
The first well is at the Grosbeak field.
Songa Trym has achieved operating efficiency of 98% in May. The rig continues to operate for StatoilHydro at the Troll Field.
Songa Dee is currently undergoing its vie year SPS (Special Periodic Survey) at the CCB yard outside Bergen.
The rig is undergoing final testing of equipment.