Drilling is one of the most costly and risky activities in oil and gas reservoir exploration and
field development. A portion of this high cost is related to unwanted vibrations of the …

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 …

During the drilling operations, optimizing the rate of penetration (ROP) is very crucial,
because it can significantly reduce the overall cost of the drilling process. ROP is defined as …

In this paper, nonlinear static and dynamic behaviors of slightly curved cantilevered pipes
conveying fluid under transverse base excitations are investigated. Incorporating …

Vibrations in mechanical systems are oscillations occurring without being intentionally
provoked. They often have detrimental effects on the system performance and may cause …

Stick-slip torsional vibration raising from bit-formation contact is a catastrophic dynamic
phenomenon occurring in deep-water oil and gas drilling systems. The torsional vibrations …

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 …

Unwanted vibration modes of a drillstring can result in inefficient drilling, and damage to the
drillstring, bit, BHA components, MWD tools and mud motors. Bottom-hole assembly (BHA) …

A survey of the literature related to theoretical and experimental studies on stick–slip
vibration in oilwell drillstring is carried out in this study. It aims to explain key concepts and …