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Dongcheng, China

Lin F.,Level 18 of Block B | Wang S.,Level 18 of Block B | Yang P.,Level 18 of Block B
Drilling Fluid and Completion Fluid

Settling of barite has long been a problem in deviated well and extended reach well drilling. A cost effective method for preventing barite settling is developed by combining the methods for barite particle size measurement and sedimentation stability testing. Experiments showed that by adding a certain amount of ultra-fine barite into commonly used drilling fluid barite improved the sedimentation stability, especially the dynamic sedimentation, of the barite, the dynamic density difference decreased from 0.436 g/cm3 for conventional barite only, to 0.011 g/cm3 for the mixed barite, greatly improving the sedimentation stability of barite. ©, 2014, North China Petroleum Administration Drilling Technology Research Institute. All right reserved. Source

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