Results 11 to 20 of about 34,534 (295)

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, Jialin Tian, Xianghui Meng, Zhe Zhang   +3 more
doaj   +1 more source

Surface Roughness and Effective Stick-Slip Motion [PDF]

, 2002
The effect of random surface roughness on hydrodynamics of viscous incompressible liquid is discussed. Roughness-driven contributions to hydrodynamic flows, energy dissipation, and friction force are calculated in a wide range of parameters.
A. Carambassis, A. Kundt, A.E. Meyerovich, A.E. Meyerovich, A.L. Demirel, A.L. Demirel, A.L. Weisenhorn, C. Eftimiu, D. Einzel, D. Einzel, D. Einzel, D. Xiu, D.A. Ritchie, D.R. Berard, D.R. Willis, E. Bonaccurso, F. Restagno, G. Reiter, H. Shinto, H. Smith, H.H. Jensen, J. Crassous, J.E. Jaffe, J.F. Nye, J.F. Nye, J.M. Parpia, J.W.G. Tyrrell, K.B. Migler, K.D. Ivanova-Moser, K.M. Jansons, L. Daikhin, L. Daikhin, M. Urbakh, M.G. Rozman, O.I. Vinogradova, O.I. Vinogradova, O.I. Vinogradova, P. Panzer, P. Welander, R. Pit, R.G. Horn, S. Albertoni, S. Richardson, V.S.J. Craig, W.K.-H. Chu, W.K.-H. Chu, Y. Zhu   +46 more
core   +4 more sources

Stick-slip fluctuations in granular drag [PDF]

Physical Review E, 2001
We study fluctuations in the drag force experienced by an object moving through a granular medium. The successive formation and collapse of jammed states give a stick-slip nature to the fluctuations which are periodic at small depths but become "stepped" at large depths, a transition which we interpret as a consequence of the long-range nature of the ...
I, Albert, P, Tegzes, R, Albert, J G, Sample, A, Barabási, T, Vicsek, B, Kahng, P, Schiffer   +7 more
openaire   +3 more sources

Discussion of Stick-Slip Dynamics of 2DOF Sliding Systems Based on Dynamic Vibration Absorbers Analysis

Lubricants, 2022
In this study, we discussed the occurrence condition stick-slip model based on a 2DOF system, in which a 1DOF system model commonly used in stick-slip analysis was attached on an elastic foundation.
Satoru Maegawa, Xiaoxu Liu, Fumihiro Itoigawa   +2 more
doaj   +1 more source

Multiscale Stick-Slip Dynamics of Adhesive Tape Peeling [PDF]

, 2015
Using a high-speed camera, we follow the propagation of the detachment front during the peeling of an adhesive tape from a flat surface. In a given range of peeling velocity, this front displays a multiscale unstable dynamics, entangling two well ...
Ciccotti, Matteo, Cortet, Pierre-Philippe, Dalbe, Marie-Julie, Santucci, Stephane, Vanel, Loic   +4 more
core   +3 more sources

Test on Stick-Slip Vibration of PDC Bit in Horizontal Wells

Shiyou jixie, 2023
Stick-slip vibration can lead to PDC bit damage and downhole instrument failure,while testing is a method commonly used to study the stick-slip vibration of drill string system in horizontal wells.In the paper,a micro PDC bit was designed to conduct rock
Long Wei, Kuang Yuchun, He Jingbin, Lin Wei, Han Yiwei, Zhang Tao, Zhu Guanghui   +6 more
doaj  

Stick-slip vibration behaviors of BHA and its control method in highly-deviated wells

Alexandria Engineering Journal, 2022
Stick-slip vibration is a common phenomenon met in oil gas drilling, especially in the complex trajectory wells such as highly-deviated wells, it will cause the earlier failure of BHA (bottom hole assembly) and lower drilling efficiency.
Weiji Liu, Feilong Yang, Xiaohua Zhu, Xingwu Chen   +3 more
doaj   +1 more source

Role of friction-induced torque in stick-slip motion [PDF]

, 2010
We present a minimal quasistatic 1D model describing the kinematics of the transition from static friction to stick-slip motion of a linear elastic block on a rigid plane.
Bennewitz R., Bhushan B., Burridge R., D. K. Dysthe, J. Scheibert, Johnson K. L., Kanamori H., Persson B. N. J., Persson B. N. J., Rubinstein S. M., Scheibert J., Scheibert J. Debrégeas G. Prevost A., Scholz C.   +12 more
core   +3 more sources

Stick–slip in hand guidance of palletizing robot as collaborative robot

International Journal of Advanced Robotic Systems, 2022
Stick–slip is a challenging problem in palletizing robots and constitutes one of the main problems in precision positioning control. This study analyzed the stick–slip of a four-degree-of-freedom ceiling-mounted hand-guiding collaborative robot in a ...
Yun-Ju Chuang, Ho Chang, Yin-Tung Sun, Tsing-Tshih Tsung   +3 more
doaj   +1 more source

Stick-slip instability for viscous fingering in a gel [PDF]

, 2002
The growth dynamics of an air finger injected in a visco-elastic gel (a PVA/borax aqueous solution) is studied in a linear Hele-Shaw cell. Besides the standard Saffmann-Taylor instability, we observe - with increasing finger velocities - the existence of
C Wagner, D Bonn, D Higgins, G Debrégeas, Garlick M., J.-M. di Meglio, McCloud K. V., N Puff   +7 more
core   +3 more sources