Field applications show that this technique can effectively prevent coal beds sloughing and decrease hole problems and drillingaccidents.
现场应用表明，该技术能有效地防止煤层坍塌，减少井下复杂情况及事故。
2
Borehole problems and drillingaccidents are liable to occur while drilling in western blocks in Tuha Oilfield, which is rich in salt lime beds.
吐哈油田西部各区块富含盐膏、膏质泥岩层，钻井时易发生复杂情况与事故。
3
Oil spills and underwater drillingaccidents are common, and despite the media hype it is too soon to tell whether this one will prove to be the biggest yet.