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) ...
Rotary drilling with positive-displacement motors can introduce positional inaccuracies that remain undetected with stationary surveys and lead to potentially mistaken drilling decisions. Part 1 of ...
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