Lost Circulation and Countermeasures in Geological and Mining Exploration Drilling
- 责任者：Mao Hongjiang (606 Battalion of Metallurgy and Geological Exploration Bureau of Sichuan ; Pengzhou 611930 ; China)
- 刊名：Northwestern Geology
- 出版年：2010
- 卷期：43(3)
- 关键词：井漏 ; lost of circulation ; 堵漏材料 ; lost circulation material
- 页码：p.141-146
- 图表：6 illus., 4 tables, 9 refs.
- 分类号：2000
- issnNo：ISSN1009-6248
- isbnNo：CN61-1149/P
By analyzing the geological leakage conditions of the drilling process, the authors propose a hydration expansion composite system and evaluate the ability of expansion, plugging and bridge sealing. The results show that plugging material PAR has highly absorbent properties and can be expanded to several times of the original size, and the quick process helps to form the rapid plugging. The system is composed of the material PAR, paddy and sawn wood and has a very strong plugging rate of more than 70%; the experiment of complex system in plugging pressure measuring devices shows that the composite system can not only block the formation but also bear a certain degree of pressure. The composite system can fully meet the needs of the