Hehe, it's called a non-disclosure agreement, and must be signed by all employees working on the drilling. Not really worth losing a job that pays $50/hour to leak information, knowing that you have guaranteed employment for the next 3 years in this area.

My wife used to work at Lakefiled Research, an assay company near Peterborough that used to work for SPQ. They had a lot of constraints on what they could see, with only one manager at the plant who had full visual.