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Grout-pipe drill mounting
| Diamond Glossary (алмазы и бриллианты - глоссарий терминологии) |
A drill mounted on a framework clamped or attached to a grout pipe.
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H bit, английский
A core bit manufactured and used in canada having set inside and outside diameters of 2.875 and 3.875 inches, respectively. the matching reaming shell has a set outside diameter of 3.906 inches. hbp. letter name designating a noncoring bit the set outside diameter of which is 3% inches. the matching reaming-shell set outside diameter is 35%4 inches.
Gravity bar, английский
A 5-foot length of heavy half-round rod forming the link between the wedge-orienting coupling and the drill-rod swivel coupling on an assembled thompson retrievable borehole-deflecting wedge.
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