AUTOMATED MSE-BASED DRILLING APPARATUS AND METHODS

摘要

Methods and apparatus for mechanical specific energy-based drilling opera tion and/or optimization, compnsing detecting mechanical specific energy par ameters, utilizing the mechanical specific energy parameters to determine me chanical specific energy, and automatically adjusting drilling operational p arameters as a function of the determined mechanical specific energy. A dril l string includes interconnected sections of drill pipe, a bottom hole assem bly, and a drill bit. The bottom hole assembly may include measurement-while -drilling or wireline conveyed instruments. Downhole measurement-while-drill ing or wireline conveyed instruments may be configured for the evaluation of physical properties such as weight-on-bit. While drilling, weight-on-bit an d calculate mechanical specific energy data are used to determine subsequent mechanical specific energy