The harsh downhole conditions of high pressure and high temperature (HPHT) encountered
in geothermal wells make the drilling operation challenging. Drilling in such environments …

The accurate and frequent measurement of the drilling fluid's rheological properties is
essential for proper hydraulic management. It is also important for intelligent drilling …

Early kick detection and blowout prevention is a major concern in any drilling operation.
Usually, conventional well control procedures rely merely on the pit gain and variations in …

Accurate measurement of drilling fluid rheological properties is essential in order to optimize
wellbore construction, and in particular to properly manage hydraulics. It becomes even …

It is common practice when drilling oil and gas wells to assume that the drillstring is placed
concentrically in the annular space with either the open hole or previous casing strings in …

Wellbore strengthening (WBS) offers enabling technology for wells that are drilled in
geological environments with a narrow drilling margin. Through its deployment, costly lost …

A numerical and experimental analysis is conducted on the flow of Newtonian and non-
Newtonian fluids in annuli. A numerical model is presented that accurately estimates the …

结合我国地下新型能源勘探工作的重大需求, 开展了“5000 m 新型能源勘探智能钻探装备与技术
” 的研究, 取得了5000 m 多功能交流变频电动钻机, 多参数孔底自动监测装置 …

Managing drilling margins in challenging wells requires precise prediction of frictional
pressure losses and equivalent circulating density (ECD). Current hydraulic models in the …

A computational fluid dynamics (CFD) analysis is conducted on the flow of Newtonian and
non-Newtonian fluids in annuli including the effect of inner pipe rotation. A practical …