buckling of a drilling string
1Extended Reach Drilling — (ERD) describes an extreme form of Directional drilling that achieves horizontal well departures beyond the conventional, or achieves particularly challenging geometries of a well in terms of horizontal versus vertical offsets from the surface… …
2hand tool — any tool or implement designed for manual operation. * * * Introduction any of the implements used by craftsmen in manual operations, such as chopping, chiseling, sawing, filing, or forging. Complementary tools, often needed as auxiliaries to… …
