Well Profiles and Terminology

A simple build/hold/drop well profile, known as an "S" well, is shown inFigure 2-1. The kickoff point (KOP) is the beginning of the build section. Abuild section is frequently designed at a constant buildup rate (BUR) untilthe desired hole angle or end-of-build (EOB) target location is achieved. BURis normally expressed in terms of degrees per hundred feet (/100 ft), whichis simply the measured change in angle divided by the measured depth (MD)drilled.