Discussion on Application of Casing Drilling Technology in Complex Formation of Coal Mine
详细信息
- 责任者：Kong Wei (Chongqing Research Institute ; China Coal Technology & Engineering Group Corp. ; Chongqing 400037 ; China)
- 刊名：Exploration Engineering
- 出版年：2011
- 卷期：38(11)
- 关键词：套管 ; casing ; 钻进 ; drilling
- 页码：p.21-23
- 图表：2 illus., 5 refs.
- 分类号：2000
- issnNo：ISSN1672-7428
- isbnNo：CN11-5063/TD
摘要
The geological conditions and coal seam characteristics have many differences in China. Casing drilling technology is adopted to replace the traditional drill pipe for borehole gas extraction, the work efficiency and gas extraction rate are improved. It also can prevent many accidents, such as sticking and hole collapsing, and remove the bottom tool assembly without pulling the drill pipe out. Casing strength and bottom tool assembly are introduced and the application prospect of casing drilling technology in complex formation of coal mine is discussed.