This 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).
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