The advancement of downhole sensor technology in the past twenty years has led to the
discovery of the phenomenon of high frequency torsional oscillations (HFTOs), which has …

When drilling ultra-deep wells with polycrystalline diamond compact (PDC) bits, the
drillstring suffered from severe vibrations that were responsible for the premature failure of …

The main objective of this paper is the development of overlap** decomposition strategy
for controller design of rotary drilling systems based on the state feedback technique. The …

Directional drilling techniques require real-time sensing of the drill bit direction and the
downhole environment from the measurement-while-drilling (MWD) sensor module …

Drilling is essential to extract subsurface hydrocarbons and geothermal energy, or store
waste fluids/gases underground. Drilling efficiency directly affects the economics of well …

The safety and efficiency of drilling engineering are greatly impeded by destructive
vibrations of drill string in air drilling, such as stick-slip, bit-bounce and their coupled …

Uncertainty quantification (UQ) is an increasingly important area of research. As
components and systems become more efficient and optimized, the impact of uncertain …

Rotary drilling systems are widely used in petroleum engineering to drill oil and gas wells.
Control of drilling process is a very important topic because it allows industrials to optimize …

Drilling is an essential operation for subsurface hydrocarbon/geothermal energy extraction
or underground waste fluid/gas storage. Efficient drilling is the key to an economically viable …

A coupled drill string dynamics model presents an opportunity to understand, replicate and
potentially control the vibrations occurring along a drill string in a deep well. This paper …