Not a drop of oil was spilled when the crane which capsized on a barge at Milford Sound last Wednesday was successfully brought back upright this morning, and the oil spill response has been stood down.

Two sorbent booms are being left in place around the barge as a precaution, but Environment Southland's oil spill response team will bring the other booms and skimmers back to Invercargill today, Regional On-Scene Commander Dallas Bradley said.

"The boom was cut off the crane yesterday. Today, the crane was brought back to the position it was in before it tipped over on Wednesday, and it will stay on the barge to be repaired," he said.

Mr Bradley praised the well planned and executed operation which saw the crane righted without any oil leaking. The crane contained 200 litres of diesel and 24 litres of engine oil, with another 1600 litres of hydraulic oil in a power pack on the barge.

"The Milford Development Authority and Smith Crane and Construction Ltd have done a great job salvaging the crane, and we received complete cooperation from both of them," Mr Bradley said.