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- W77370477 abstract "Maurer Engineering Inc. (MEI) under contract with the Gas Research Institute (GRI), evaluated drilling of deep gas wells to determine future research projects. Three major areas were covered: (1) typical performance figures and procedures for wells exceeding 15,000 ft; (2) capabilities and limitations of alternative drilling mechanisms; and (3) a review of the rock mechanics involved in drilling and wellbore stability. Results of the study showed, that in deep wells seventy percent of the time is spent drilling or tripping due to slow penetration rates and reduced bit life. This is caused by changes in rock properties that are the result of high over burden and drilling fluid pressures. An economic and qualitative analysis evaluated and queued technologies that could increase penetration rates and extend bit life. The candidates providing the best possibility of success and maximum savings are PDC/TSD shear bits, slimhole drilling, roll-cone bits, and downhole motors; of these, improvements in shear bits have the best opportunity for near-term results. The report will serve many readers as a convenient reference for descriptions of deep drilling systems currently used in the U.S., typical performance data, mechanisms of wellbore stability, and descriptions of the entire variety of mechanism used tomore » comminute rock.« less" @default.
- W77370477 created "2016-06-24" @default.
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- W77370477 date "1990-06-01" @default.
- W77370477 modified "2023-09-27" @default.
- W77370477 title "Deep-drilling basic research. Volume 1. Summary report. Final report, November 1988-August 1990" @default.
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