Gas Volume Requirements for Underbalanced Drilling: Deviated HolesThis concise technical handbook, written to aid drilling engineers and drilling supervisors in underbalanced drilling (UBD) operations, includes detailed calculations. In fact, readers can easily code the mathematical models presented in this book and build their own UBD simulators in spreadsheet programs. Guo and Ghalambor cover much needed information on the applications for drilling water wells, mine boreholes, geotechnical boreholes, and oil and gas recovery wells by providing illustrative examples throughout the text. Further, they include a complete set of engineering charts with a thorough description of theory and principles. Contents: Underbalanced drilling basics Air, gas, mist, and unstable foam drilling Stable foam drilling Aerated liquid drilling Selecting compressor units Field applications Appendices (Required air flow rates for air drilling vertical holes; required gas flow rates for gas drilling vertical holes; required air flow rates for air drilling deviated holes). |
Contents
Chapter | 1 |
Limitations of Underbalanced Drilling | 8 |
References | 17 |
Copyright | |
10 other sections not shown
Common terms and phrases
90 ft/hr ROP aerated liquid drilling Air and Gas air drilling Air Flow Rate air injection rate Annulus cross-sectional area Annulus pressure bbl/hr bit nozzles Borehole bottom-hole pressure calculated collar top cuttings transport density determining the minimum drill bit drilling fluid Drillpipe Flow Rate drillstring flow path Flow Rate scf/min foam quality index foam velocity friction factor frictional pressure component ft/hr ROP 30 ft³/min ft³/sec gas drilling gas flow rate gas injection rate Geothermal gradient Hydraulic diameter hydrostatic pressure ideal gas law lb/ft² Minimum Required 0.6 Minimum Required Air minimum required volumetric Mud Flow Rate particles Pfr2 Pfr3 pressure by Eq psia Required 0.6 S.G. Required Air Flow reverse circulation ROP 0 ft/hr ROP 60 ft/hr S.G. Gas Flow specific gravity specific weight stable foam drilling Substituting equation temperature turbulent flow underbalanced drilling volumetric flow rate volumetric gas flow wellbore