line-level: 2" class=MsoNormal>Improvement and Application of Diamond Bit for Drilling in Complex Formation

• 责任者：Ruan Hailong (Beijing Institute of Exploration Engineering ; Beijing 100083 ; China) ; Ji Weijun
• 刊名：Exploration Engineering
• 出版年：2010
• 卷期：37(1)
• 关键词：金刚石钻头 ; diamond bit ; 复杂地层钻进 ; drilling in complicated formation
• 页码：p.67-69
• 图表：4 illus., 5 refs.
• 分类号：2000
• issnNo：ISSN1672-7428
• isbnNo：CN11-5063/TD

The formation structure is usually unstable and broken with soft and hard layers interbedded, which makes the service life of drilling bit very short and the accidents happen frequently. According to these problems, based on diamond wire-line coring drilling technology in current drilling engineering and by design improvement on diamond bit in tests, drilling efficiency and service life of drilling bit were both improved with drilling efficiency significantly increased and drilling accident reduced.