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Drilling procedure used in testing experimental bits
Diamonds used in experimental bits
12 per carat actual operating conditions air at 80 alloy asso AX-size beryllium beryllium-copper matrix bevel-wall bit crowns bit mold bits cast-set Bits in test bits included Bureau of Mines Congo diamonds core barrel coring bits crystal form crystallographic Cubic feet diamond bits Diamond loss diamonds oriented dodecahedrons drill rods drilled per bit drilling tests involving epidote experimental bits Feet drilled foot drilled granite greenstone group are summarized group of bits hard vector directions hole included in series James Boyd loss per bit loss per foot Macles Mining Research Branch Mount Weather Experimental Number of bits Number of stones Octahedron ORIENTATION IN DIAMOND oriented in hard produced at Mount Quartz latite rate of penetration Report of Investigations resettable stones saussuritized dacite porphyry schist set in soft setters setting plate soft vector stones oriented summarized in table suritized dacite porphyry Test Series three-way classification Trisoctahedron UOO feed gear vacuum vector orientations