Results 21 to 30 of about 584,502 (236)
Sound&Vibration, 2023 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.
Kanhua Su +5 more
semanticscholar +1 more source
Shock and Vibration, 2016 Comparative analysis whether considering the lateral inertia or not, aiming at the longitudinal vibration of the drill string in drilling progress, is proposed.
Jialin Tian +5 more
doaj +1 more source
DRILL COLLAR STRING DESIGN AND ITS EFFECT ON DRILLING M.E.R. [PDF]
Proceedings of Drilling and Rock Mechanics Symposium, 1963 The problem of obtaining a Maximum Economic Rate of drilling is the main task of engineers, tool pushers, superintendents, field drilling foremen and people involved in drilling research problems. A rig drilling at its Maximum Economic Rate will always make hole at a rate less than the maximum rate of penetration.
Fred K. Fox, Nadim Nasir
openaire +1 more source
Modeling of drill string dynamics in directional wells for real-time simulation
International Conference on Advances in System Simulation, 2023 Simple and computationally efficient drill string models running real-time describing motion in all axes in directional wells are important for the implementation of closed-loop control and assisted monitoring during drilling operations.
N. Tengesdal +3 more
semanticscholar +1 more source
ABC for model selection and parameter estimation of drill-string bit-rock interaction models and stochastic stability [PDF]
Journal of Sound and Vibration, 2022 The bit-rock interaction considerably affects the dynamics of a drill string. One critical condition is the stick-slip oscillations, where torsional vibrations are high; the bit angular speed varies from zero to about two times (or more) the top drive ...
D. Castello, T. Ritto
semanticscholar +1 more source
Analysis of Drill String Coupled Vibration and Drilling Fluid Pressure in Downhole Section
Shiyou jixie, 2021 To address the problem of nonlinear coupled vibration of the drill string in the axial, lateral and torsional direction in the downhole section of deepwater drilling, a mathematical model of nonlinear coupled vibration of the drill string in the downhole
Liu Jing +5 more
doaj
Petroleum Exploration and Development, 2018 Drill string will sustain large uplift force during the shut-in period after gas overflow in an ultra-deep well, and in serious case, it will run out of the wellhead.
Hu YIN +4 more
doaj +1 more source
Stability Analysis and Visual Application of Drill String Drag and Torque Test Device
Shiyou jixie, 2021 The nonlinear buckling of the drill string during drilling affects the safe and stable operation of the drag and torque test device. For the horizontal well drag and torque test device, based on the dynamic software ADAMS, combined with the force balance
Wu Zebing +5 more
doaj
Scientific ReportsStick–slip vibration is a common phenomenon in ultra-deep drilling that significantly impacts the failure of both drill bits and drill tools. The most direct and efficacious approach to alleviating the stick–slip vibration of the drill string in the ...
Hongshan Zhao, Wenchang Wang, Kaixian An
semanticscholar +1 more source
Angewandte Chemie, EarlyView.A data‐driven discovery engine—exhaustive enumeration of carbazole‐containing polycyclic aromatic hydrocarbons (Cz‐PAHs) followed by machine learning—identifies boron‐free, narrowband blue thermally activated delayed fluorescence emitters for organic light‐emitting diodes (OLEDs).
Masaya Hagai +6 more
wiley +2 more sources