Results 11 to 20 of about 22,977 (217)
On physical models in V.I. Gulyayev's three papers on drill string whirling and torsional vibrations
Petroleum, 2020 This paper introduces physical models of drill string whirling and torsional vibrations and analyses the physical models in V.I. Gulyayev's three papers on drill string whirling and torsional vibrations: “V.I. Gulyayev, L.V.
Zifeng Li, Chaoyue Zhang, Guangming Song
doaj +1 more source
Stick–Slip Vibration Characteristics Study of the Drill String Based on PID Controller
Energies, 2023 In order to address the issue of drill string stick–slip vibration, which leads to drill bit wear and reduces the drilling velocity, we conducted a study on the characteristics of stick–slip vibration using a proportional-integral-derivative (PID ...
Baoyong Yan +3 more
doaj +1 more source
Journal of Advanced Computational Intelligence and Intelligent Informatics, 2023 During the drilling process, horizontal drill strings are often subject to stick-slip and back-pressure phenomena, which undermine drilling safety and affect drilling costs.
Jie Hu +6 more
semanticscholar +1 more source
Energy Reports, 2023 Large amplitude and high frequency WOB (weight on bit) fluctuation will lead to problems such as low rock breaking efficiency, short service life and slow drilling speed. This problem is particularly prominent in hard and difficult to drill formation and
Liu Yongwang +5 more
doaj +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
A brief discussion on the choice of a model to simulate drill-string dynamics
Proceeding Series of the Brazilian Society of Computational and Applied Mathematics, 2023 . A comparison of the dynamics obtained using two different models of a drill-string is made. A structure that is 1200 m long is analysed. In the first model, a two degrees-of-freedom (DOF) approach is used, where 1-axial DOF and 1-torsional DOF are ...
H. Goicoechea +3 more
semanticscholar +1 more source
Non-Linear Dynamic Analysis of Drill String System with Fluid-Structure Interaction
Applied Sciences, 2021 In this research, the non-linear dynamics of the drill string system model, considering the influence of fluid—structure coupling and the effect of support stiffness, are investigated. Using Galerkin’s method, the equation of motion is discretized into a
Rongpeng Wang +3 more
doaj +1 more source
Modelling of drill string nonlinear dynamics with a drilling fluid flow
Вестник КазНУ. Серия математика, механика, информатика, 2018 In this work the development of mathematical models of drill string dynamics under the influence of internal drilling fluid flow, which is of great importance for ensuring fast, cost-effective and safe process of oil and gas well drilling, is conducted.
Askar K. Kudaibergenov, L. A. Khajiyeva
doaj +1 more source
Applied Sciences, 2021 In downhole drilling systems, self-excited torsional vibrations caused by the bit-rock interactions can affect the drilling process and lead to the premature failure of components.
Vincent Kulke +3 more
doaj +1 more source
Nonlinear Model and Qualitative Analysis for Coupled Axial/Torsional Vibrations of Drill String
Shock and Vibration, 2016 A nonlinear dynamics model and qualitative analysis are presented to study the key effective factors for coupled axial/torsional vibrations of a drill string, which is described as a simplified, equivalent, flexible shell under axial rotation.
Fushen Ren +4 more
doaj +1 more source