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The driller replaced the worn drag bit with a tungsten-carbide-tipped model to improve penetration through the sandy clay.
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The driller replaced the worn drag bit with a tungsten-carbide-tipped model to improve penetration through the sandy clay.
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Related words
drag bit
Noun
Japanese Meaning
砂、粘土、または軟らかい岩石などの軟質地層で使用されるドリルビット。ドリルパイプのコネクタにブレードが取り付けられており、特に水井戸の掘削に用いられる。切削部はタングステンカーバイドで強化されている。
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