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 …

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

The control of multibody drill-string systems is not easy and designing such systems is
considered challenging because of the difficulty in the dynamic analysis of its nonlinear …

This study investigated the design of a drill bit stick–slip vibration and active disturbance
rejection controller under the influence of an uncertain load at the bottom of a drill hole …

A controller for electromechanical drive systems according to the structure of an output
neuron is proposed. Unlike the synthesis of a traditional neural network of a neurocontroller …

Stick–slip vibration (SV) of drill string systems is the main cause of fatigue failure of PDC bits
under complex drilling conditions. Exploring its mechanism is helpful for identifying the …

Drilling operations are associated with severe vibrations that lead to an inefficient process.
Stick–slip vibration presents one of the major problems in the drilling industry and affects the …

This article introduces a novel setpoint weighted PI-FOPD (SWPI-FOPD) cascade controller
with a prefilter. It further describes a four-stage design strategy that sequentially enhances …

Eliminating the excessive stick–slip torsional vibrations of drill strings by utilizing an effective
controller can significantly increase penetration rates and reduce drilling operation costs …

During the drilling process, stick-slip vibration of the drill string is mainly caused by the
nonlinear friction generated by the contact between the drill bit and the rock. To eliminate the …