@inproceedings{231c6d2d240247928e4f40c2bf3e568c,
title = "The significance of using geological and geomechanical data in selection of optimal bits",
abstract = "Selection of an optimal bit is a critical issue in drilling engineering. Specific energy (SE) and Cost per Foot (CPF) are the most common methods for evaluation of bit efficiency and optimal bit selection. The major shortfall of both methods is that they do not directly account for geological and geomechanical parameters of formations being drilling. In this paper, results of using the two foregoing methods are compared using Formation Drillability (FD) method, which directly accounts for geological and geomechanical parameters of a formation. This method combines various geological and geomechanical parameters and yields a dimensionless parameter indicating the formation drilling hardness (drillability). Results of this study show that the amount of energy, cost and time spent for drilling a unit volume/length of an identical formation may vary in different wells. This is due to the fact that geological and geomechanical characteristics of a formation may vary among wells and even within short intervals of a single well. Therefore, an optimal bit may not be appropriately selected, if drilling and economical parameters are the only factors considered and the formation geological and geomechanical specifications are ignored.",
keywords = "Bit Selection, Cost per Foot, Formation Drillability, Geomechanical and Geological Characteristics, Specific Energy",
author = "D. Javani and A. Hashempour",
note = "Publisher Copyright: {\textcopyright} 2015 by the Canadian Institute of Mining, Metallurgy \& Petroleum.; 13th ISRM International Congress of Rock Mechanics 2015 ; Conference date: 10-05-2015 Through 13-05-2015",
year = "2015",
month = jan,
day = "1",
language = "English",
series = "13th ISRM International Congress of Rock Mechanics",
publisher = "International Society for Rock Mechanics",
editor = "Hassani and Hadjigeorgiou and Archibald",
booktitle = "13th ISRM International Congress of Rock Mechanics",
}