Title: Air and Gas Drilling Field Guide
Subjects: Petroleum engineering, Gas well drilling, Oil well drilling, Air drilling (Petroleum engineering), Gas drilling (Petroleum engineering), Forage à l'air (Technique du pétrole), Forage au gaz (Technique du pétrole), Petroleum, Engineering (general), Mining, Professional, career & trade -> engineering -> general engineering, Trades & technology -> power resources -> petroleum, Trades & technology -> technology & engineering -> mining