88 Energy said it had started drilling its Winx-1 oil well in Alaska on Friday.
The well was drilled to 600 feet after which the company pulled out of hole to pick up a bottom-hole assembly, with logging while drilling tools attached.
At 11:45 on 17 February (AK time), Nordic Rig#3 was drilling ahead at 880 feet, the company said.
The forward plan was to deepen the hole to about 2,500 feet before setting surface casing.
Winx-1 would target gross best estimate prospective oil resource of 400m barrels of oil, representing a net 144m barrels to 88 Energy, the company said last week.
Other shareholders in the well include Red Emperor Resources and Pantheon Resources.
At 8:00am: (LON:88E) 88 Energy Ltd share price was +0.01p at 1.09p