Finding
The model presented in the paper allowed for the calculation of formation forces and their effects on drilling trajectory changes, with the results indicating which strata were primarily responsible for these changes and allowing for improvements in drilling technology in the region.
Paper
A Model for Calculation of Formation Force and Its Application
Citations: 1
Full text
Semantic ScholarAbstract
The paper presents a model of a rock-bit interaction. The model allows one to calculate formation forces that develop from rock-bit interactions and weight on bit (WOB). The model accounts for the effects of drilling trajectory changes and formation anisotropy and it may eliminate the shortcomings of other models that do not specifically consider these effects. The paper discusses in detail the features and factors that affect formation forces. The model was applied to modify drilling technology in the south region of Daqing, China. Drilling data were collected and the formation forces were calculated. The results showed that the average formation force to WOB ratio was about 0.74%. The results also indicated what strata are primarily responsible for uncontrolled changes of drilling trajectory. This analysis allowed the authors to improve the drilling technology in the region.
Authors
Tie-Yi Yan, Jianqun Zhang
Journal
Spe Drilling & Completion