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Improved CCS Method for Bit Selection by Andrianus Bimo is a document available to read on EtoBox.

This paper presents a new methodology for calculating confined compressive strength (CCS) to improve bit selection and performance prediction. The current standard of using unconfined compressive strength (UCS) is problematic because it does not account for the confining pressures on rock from mud weight. The new CCS method is based on rock mechanics principles, requires little calibration, and provides a more realistic measure of rock strength experienced by drill bits. Field and lab data are presented tha

Author

Andrianus Bimo

Language

EN