Measures of Hole Quality Improvement of Rotating Drilling Rig in Soft Soil Area
详细信息
- 责任者：Wang Wenming (Shanghai Guanglian Construction Development Co. ; Shanghai 200438 ; China)
- 刊名：Exploration Engineering
- 出版年：2013
- 卷期：40(9)
- 关键词：工程钻机 ; engineering drill ; 成井工艺 ; well completion technology
- 页码：p.68-71
- 图表：1 illus., 3 tables, 6 refs.
- 分类号：2000
- issnNo：ISSN1672-7428
- isbnNo：CN11-5063/TD
摘要
According to the collapse,borehole diameter shrinkage,slip of drill bit,large thickness of sediment in the bottom appeared in a viaduct project in soft soil layer with rotating drilling rig,the accident causes were analyzed; and casing lengthening,bit structure improving,drilling process optimizing,borehole cleaning by air-lift reverse circulation and slurry purifying methods,etc. were adopted with good effects. The construction experiences could be reference to the similar projects.