Research on Working Mechanism of Drilling Pipe for Geological Drilling of Coalmine Gas

详细信息   

• 责任者：Ma Shenqi （Xi’an Branch of China Coal Research Institute ; Xi’an 710054 ; China） ; Wang Yun
• 刊名：Exploration Engineering
• 出版年：2008
• 卷期：35(9)
• 关键词：钻杆 ; drill rod
• 页码：p.11-15
• 图表：2 illus., 5 tables
• 分类号：2000
• issnNo：ISSN1672-7428
• isbnNo：CN11-5063/TD

摘要

Good progress has been made in the drilling work under unbalanced conditions by designing and producing different drilling pipes on the basic of different gas geological conditions. This paper expounds the slag discharging mechanism, the scope of application, as well as the attentions and technological parameters of different drilling pipes.