Ключевые слова: bha, bit, bore, borer, carbide, chrystal, cone, construction, cutter, cutting, derrick, drill, drilling, energy, equipment, exploration, fuel, gas, gasoline, hard, hole, industrial, industry, instrument, jet, milling, offshore, oil, oilfield, oilrig, part, pdc, petroleum, pipe, platform, power, production, rig, rock, roller, steel, technological, technology, teeth, tool, tower, tungsten, turning, well,