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Rotary bucket drill
| Diamond Glossary (алмазы и бриллианты - глоссарий терминологии) |
A rotary-type drill on which a rotary bucket is fastened to the kelly bar. the bucket is equipped with a hinged bottom, which has straight-edged cutting blades or teeth. when rotated by the kelly bar the bucket loads from the bottom; when filled it is withdrawn from the hole and dumped by unlatching the bottom. holes 12 to 96 inches in diameter can be drilled with this machine in soft, boulder-free ground. also called bucket rig, cesspool digger, dry-hole digger, rat-hole rig. see bucket auger.
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Bucket rig, английский
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Rotary rig, английский
Bucket rig, английский
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