Ghost Rig (2001)

A team of environmentalists, lead by publicity-hungry Vincent (Jaason Simons), sneaks aboard a North Atlantic oil rig in an effort to thwart its demolition. Problems arise almost immediately, with the electricity and the radio, but not the least of their troubles is an unseen body-hopping entity that is murdering them in horrific ways one at a time. Or is it one of their own? Wheelchair-bound Crawford (Noel Fitzpatrick) has some ideas, few of them very healthy and most of them regarding a chalk pentangle on a deck below.