| 单词 | percussion drilling |
| 释义 | percussion drilling in the Oil and Gas Industry (pərkʌʃən drɪlɪŋ) noun (Extractive engineering: Field development, Drilling) drilling Percussion drilling is a drilling method which involves lifting and dropping heavy tools to break rock, and uses steel casing tubes to stop the borehole from collapsing. Percussion drilling is carried out by breaking up the formation by repeated blows of a heavy bit or achisel inside a casing pipe. Percussion drilling is accomplished by crushing the rock with heavy blows delivered by a heavy chisel-shapedbit suspended on a cable. Percussion drilling is a drilling method which involves lifting and dropping heavy tools to break rock,and uses steel casing tubes to stop the borehole from collapsing. |
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