The worker was injured in Wednesday's blowout at a
One worker died at the scene while another three were airlifted on Wednesday to hospitals in
The condition of the other injured worker was not immediately known.
No identities have been released, but Pennoyer said the four were employed by contractors who were replacing drilling hardware on the well.
A blowout is an eruption of oil or gas from the wellhead that can erupt in flames if there is an ignition source, such as a spark.
The cause of the incident remains under investigation, Pennoyer said.
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