Changes in directional drilling and surveying practices could lead to a reduction in positional errors arising from nonconstant wellbore curvature. Part 1 of this series (OGJ, Oct. 27, 2003, p. 51) ...

Many types and sizes of drilling machines are used in manufacturing. They range in size from a simple bench mounted sensitive drill press to the large multiple-spindle machines able to drive many ...

Drilling is one of the most complex machining processes. The chief characteristic that distinguishes it from other machining operations is the combined cutting and extrusion of metal at the chisel ...