Stick-slip vibration presents one of the main problems in the quality of drilling performance
limiting tool life and productivity. This type of vibration can be suppressed by means of many …

Drilling is one of the most challenging and expensive processes in hydrocarbon extraction
and geothermal well development. Dysfunctions faced during drilling can increase the non …

This paper recommends standardized names and equations for the two most common uses
of mechanical specific energy (MSE) concepts:“total MSE” and “downhole MSE.” These …

Stick-slip is a dysfunction of rotary drilling, characterized by large cyclic variations of the
drive torque and the rotational bit speed. It is recognized as a major source of problems …

Drilling systems are subject to torsional vibrations that are excited by bit-rock or by drillstring
formation interaction forces. These torsional oscillations can be distinguished by mode …

US8214188B2 - Methods and systems for modeling, designing, and conducting drilling
operations that consider vibrations - Google Patents US8214188B2 - Methods and systems …

Despite a significant research effort to understand and mitigate stick-slip in drill-strings, this
problem yet to be solved. In this work, a comprehensive parametric robustness analysis of …

Drilling system applications are subject to torsional vibrations that are induced by self-
excitation mechanisms. A common mechanism is a falling characteristic of contact or cutting …

In this paper, a new model to study drill-string dynamics is developed. Some of the novelties
of the paper are:(1) the use of a new bit-rock interaction relation that does not restrict …

Methods and systems of reducing drilling vibrations include generation a vibration
performance index using at least one frequency-domain model having a velocity-dependent …