Drill string vibrations and shocks (V&S) can limit the optimization of drilling performance,
which is a key problem for trajectory optimizing, wellbore design, increasing drill tools life …

Tubular strings in oil and gas wells are the backbone and central nervous system of oil and
gas drilling and production operations. Tubular mechanics in oil and gas wells is the most …

Downhole mud/shale interaction can only be properly understood if rock mechanical, shale
hydration, and fluid transport phenomena are taken into account. This paper presents a …

See application file for complete search history.* cited by examiner Primary Examiner—Elias
Desta (74) Attorney, Agent, or Firm—Conocophillips Company (57) ABSTRACT Systems …

A study consisting of theoretical analysis, numerical modeling, and field experiments has
been conducted to characterize drill string vibration. Particular attention was focused on …

The oil-and-gas industry has become increasingly interested in drilling dynamics and
vibration as causes of drilling inefficiency and reduced drilling performance. Generally …

High‐torque, low‐speed drilling mud motors are typically used to drive rotary‐steerable
systems (RSS) to improve the rate of penetration (ROP) of the RSS bottomhole assemblies …

Laboratory and field experiments were performed to investigate the dynamics of the drill bit
and drill string. Laboratory results for Anti-whirl and conventional polycrystalline diamond …

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

Drillstring dynamics is highly non-linear in nature and its model can only be described by a
set of non-linear differential equations. In addition to this complexity, the drillstring dynamics …