Willaroo-1 had reached a depth of 92m before drilling operations were suspended due to repair work on the gearbox of the Ensign Rig 20.
The work is expected to take two or three days.
In April, Orion had to push back drilling of the well to Sunday, May 11, due to rig problems. The well was expected to be spudded on April 24.
Willaroo-1 is the first well in Orion's exploration program in NSW and is targeting 40 million barrels of in-place oil resources in the Jurassic sands and 115 billion cubic feet of gas in-place in the Permian sands.
The Willaroo prospect is immediately north of proven gas reserves near Narrabri in NSW.
Following Willaroo-1, the company's next well is planned to be Nyngynderry-1 in the Darling Basin in northwestern NSW.
