MLH－Ⅱ钻井液在大井眼密闭取心中的应用  

MLH-ⅡDrilling Flvid Used in Sealrd Coring in Large Hole

作　　者：秦永宏 张家栋 宋雪艳 

出　　处：《石油钻探技术》1994年第3期30-32,共3页Petroleum Drilling Techniques

摘　　要：介绍了大井眼密闭取心井高检１井所用ＭＬＨ－Ⅱ无机凝胶钻井液的特性、配方和性能。实践证明，这种钻井液具有独特的流变性和极强的剪切稀释能力，在０．１～０．３ｍ／ｓ极低环空返速下确保携岩和净化井眼要求，能有效抑制页岩失稳和抗污染，综合效益好。The property, ingredients and performance of MLH-Ⅱ drilling fluid with inorganic gel usedin coring well Gao Jian Well No. 1 are introduced, and the fluid proves to have unique rheologicalproperty, strong shear thinning capability, annular return velocity of 0.1-0. 3m/s can effectivelyinhibit shate from collapsing and resist contamination and overall benefit is good.

关 键 词：大井眼 高压 密闭取心 钻井泥液 

分 类 号：TE254.4[石油与天然气工程—油气井工程]