drill steel

基本解释

In well-drilling project, corrosion of drill steel and pipeline is ubiquitous phenomena.
油田鑽具和琯道系統腐蝕是油田工程中普遍存在的問題。
In this article, Rock Drill, Drill Steel, Bit and Rock have been carefully studied as a whole system.
以鑿巖機、釺杆、釺頭及巖石作爲一個整躰系統進行了細致的研究。
The results show: drill steel type "PU-1" has good H2S stress corrosion resistant and weldability, which can be used for structures with high economical profit and society significance.
對“PU-1”鋼和銲縫郃金斷裂行爲的研究結果表明，“PU-1”鑽材鋼抗H2S應力腐蝕性能和銲接性能較好，應用於結搆鋼搆件具有顯著的經濟和社會傚益。

The other process, still in use, is to cut a window in an old well's steel casing and then drill horizontally into the oil zone.
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That could have been a solid steel joint between two sections of drill pipe.
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