Determining Method of the Optimal Drilling Fluid Pressure in Gas Drainage Drilling
GU Shuan-cheng
FAN Qi
Abstract：Application of elastic theory analysis of horizontal gas drainage drilling in the original stress and drilling fluid under pressure from a common drill hole wall stress field. With coulomb strength criterion and the maximum normal stress theory as the drill hole wall shear failure and tensile crack criteria. Collapse pressure and fracture pressure calculation formula is derived under different lateral pressure coefficient. Combined with engineering examples are applicable to different strata proposed optimal drilling horizontal gas drainage drilling fluid pressure method. This method will be horizontal gas drainage drilling project to provide more reliable and more practical reference.
Keywords：gas drainagehorizontal drillinghole-wall stabilityoptimal drilling fluid pressurelateral pressure coefficient
Publication Date：2014-11-09
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 14-17 )