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Drilling Technology for Zhunye Well-4 in Jimusaer County of Xinjiang

XIONG Hu-lin;ZHANG Fei;No.9 Geological Brigade,Xinjiang Geology and Mineral Resources Exploration and Development Bureau;  
Based on the drilling engineering of Zhunye well-4 in Jimusaer County of Xinjiang,this paper introduces drilling rig construction technological processes of shale gas parameter well in aspects of wellbore structure,drilling tool assembly,mud technology,coring technology and well deviation control. In view of the problems encountered in the construction process,such as the overburden layer of large-sized boulders,super-long open hole section drilling and lost circulation,through optimizing drilling tool structure,adjusting mud viscous shearing and lubrication performances,using bridge slurry plugging and other technical measures,the project was smoothly completed and the technical indicators meet the design requirements. The practice experience is summarized,which can provide reference for the large diameter drilling construction in this area.
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