Premier Oil has resumed drilling at the Isobel Deep prospect off the Falkland Islands after it was temporarily shutdown following a problem with the rigs blowout preventer.
Last month the UK independent said work on the well would be suspended while the blowout preventer was brought to surface for inspection and repairs.
The decision was made after the successful setting of the casing at a depth of 1273.9metres.
The rig was utilised in the interim period to drill the top-hole sections and set the conductor on the Chatham and Jayne East locations.
Falkland Oil & Gas previously said the changes have had no financial impact on the company.