石油钻采工艺2012，Vol.34Issue(1)：19-22,4.
气体钻井岩屑运移破碎研究
Study on gas drilling cuttings breaking during the return process
摘要
Abstract
More cuttings produced during gas drilling due to higher mechanical penetration rate and the cuttings usually tend to be larger in the bottom and smaller uniform in size when back to the wellhead. It is indicating that cuttings should appear successive breaking within the process of migration. According to particle collision broken theories, the successive breaking phenomenon was analyzed, and the calculating method of crash velocity for the occurrence of secondary breaking was given in this paper. Meanwhile, the breaking process matrix and the particle size distribution function were applied to study the re-cracking process of cuttings migration in the whole wellbore. The calculating results show that the cuttings in the wellbore were broken first in the form of the uneven size volumetric fracturing and then progressively turned into the surface fracture of the uniform process, and ultimately was tending towards stable particle size distribution state.关键词
气体钻井/颗粒碰撞/岩屑/破碎/粒度分布Key words
gas drilling/ particle collision/ cuttings/ breaking/ particle size distribution分类
能源科技引用本文复制引用
朱忠喜,柳贡慧,岳达明,蒋记伟..气体钻井岩屑运移破碎研究[J].石油钻采工艺,2012,34(1):19-22,4.基金项目
国家自然科学基金"气体循环钻井动态流动理论及携岩能力研究"(编号:50974021) （编号:50974021）
国家重点基础研究发展计划(973计划)"深井复杂地层安全高效钻井基础研究"(编号:2010CB226704). （973计划）
