Analysis on Deep-Hole Geological Core Drilling
详细信息
- 责任者：Zhang Peifeng (Beijing Institute of Exploration Engineering ; Beijing 100083 ; China)
- 刊名：Exploration Engineering
- 出版年：2011
- 卷期：38(8)
- 关键词：深孔 ; deep hole ; 取心钻进 ; core drilling
- 页码：p.6-11
- 图表：2 illus., 10 refs.
- 分类号：2000
- issnNo：ISSN1672-7428
- isbnNo：CN11-5063/TD
摘要
The accurate prediction of formation pore pressure, in-situ stress state, formation collapses pressure and fracture pressure before drilling are vital to conduct core drilling. These are the design basis of the hole-wall structure, casing program and strength, density and rheological properties of drilling fluids. Based on the hole-wall stability, the discussion is made on the existing problems of hole-wall structure, casing program, drilling tool assembly, drilling equipment in deep-hole geological core drilling and suggestions are put forward for the improvement.