hole drilling
61bottom hole — The lowest part of a drilled hole where the drilling bit cuts into the rock [16] …
62dry hole agreement — A support agreement in which the contributing party agrees to make a cash contribution in exchange for geological or drilling information, if a dry hole is drilled …
63dry hole clause — A provision in an oil and gas lease specifying what a lessee must do to maintain the lease for the remainder of the primary term after drilling an unproductive well. A dry hole clause is intended to make clear that the lease may be maintained by… …
64dry hole agreement — A support agreement in which the contributing party agrees to make a cash contribution in exchange for geological or drilling information, if a dry hole is drilled …
65dry hole clause — A provision in an oil and gas lease specifying what a lessee must do to maintain the lease for the remainder of the primary term after drilling an unproductive well. A dry hole clause is intended to make clear that the lease may be maintained by… …
66pilot hole — When using a large drill bit, it is sometimes hard for the drill to cut through the metal and do it evenly in a straight line. A pilot hole is first made with a small bit. Then, when you use the large bit, the drilling is much easier …
67Mo|hole — «MOH hohl», noun. an experimental drilling project to bore into the earth s mantle to obtain geological specimens and to verify the Mohorovicic discontinuity. The project was financed by the United States government and ended by Congress in 1966 …
68self-drilling screw — noun A fastener that taps and drills its own hole during application …
69Dry hole charge — The charge off to expense of a previously capitalized cost upon the conclusion of an unsuccessful drilling effort. U.S. Dept. of Energy, Energy Information Administration s Energy Glossary …
70Drill bit — For the fictional character, see Drill Bit (Transformers). For the cancelled skyscraper nicknamed Drill bit, see Chicago Spire. For the types used in drilling wells, see Well drilling. From top to bottom: Spade, lip and spur (brad point), masonry …
