How Drilling Works
From rigging up to reaching total depth, a well is drilled in a methodical sequence. Each phase must be completed safely before the next begins.
Mud Weight & Pressure
Hydrostatic pressure, pore pressure, fracture gradient, and the mud weight window explained with real formulas.
Read More →Well Control
Kick recognition, shut-in procedures, and the driller's method vs wait-and-weight kill methods.
Read More →Directional Drilling
How MWD/LWD tools and downhole motors steer a wellbore to a precise target thousands of feet away.
Read More →Casing Design
Why wells are drilled in stages, how casing points are chosen, and what each casing string protects.
Read More →Drilling a Well, Step by Step
Location Preparation
Pad construction, cellar digging, conductor casing set. Offshore: rig towed to location, legs jacked down or anchors set.
Spud & Surface Hole
Drilling begins with a large-diameter bit. Conductor and surface casing set and cemented to protect freshwater zones.
BOP Installation & Test
The blowout preventer stack is installed and function-tested to its rated pressure before drilling resumes.
Intermediate Sections
Drilling continues in stages, each with a smaller bit. At casing points, casing is run, cemented, and drilling continues. See casing design.
Drilling the Reservoir Section
Mud weight is carefully managed within the mud weight window — above pore pressure, below fracture pressure.
Completion or Abandonment
Productive wells are completed for production. Dry wells are plugged and abandoned per regulatory standards.