There are three phases of a Wellbore: drilling, casing, and tubing

Production of oil or gas is a complex, time- and cost-intensive undertaking, but in principle, every wellbore goes through three phases: Drilling with drill pipes, lining with casing pipe and production with tubing. 1. Drilling with drill pipes Drill pipes are durable steel pipes that conduct the force to the drill bit. In many cases the drill pipe turns…