Results 31 to 40 of about 1,054 (134)

Universal response of optimal granular damping devices [PDF]

, 2012
Granular damping devices constitute an emerging technology for the attenuation of vibrations based on the dissipative nature of particle collisions. We show that the performance of such devices is independent of the material properties of the particles ...
Bai, Bannerman, Brilliantov, Chen, Chung, Duan, Duncan, Friend, Gustavo Rosenthal, Kadanoff, Lieber, Liu, Lu, Luis A. Pugnaloni, Marhadi, Martín Sánchez, McNamara, Panossian, Papalou, Pöschel, Saeki, Salueña, Schäfer, Sánchez, Sánchez, Velichkovich, Xia   +26 more
core   +2 more sources

Multiple‐Echo Suppression Modeling and Experimental Verification for Acoustic Transmission along Periodic Drillstring Using Dual Receivers

Shock and Vibration, Volume 2014, Issue 1, 2014., 2014
In the oil industry, the accompanied reverberation is a major constraint in the transmission rate and distance because the drillstring is a heterogeneous assembly. Based on the transient impulse responses in uplink and downlink channels, an improved simplified echo suppression model with two acoustic receivers is presented in consideration of position ...
Li Cheng, Chang Jinfeng, Liu Zhao, Fan Shangchun, Chao Tao   +4 more
wiley   +1 more source

Effect of particle shape and fragmentation on the response of particle dampers [PDF]

, 2013
A particle damper (PD) is a device that can attenuate mechanical vibrations thanks to the dissipative collisions between grains contained in a cavity attached to the vibrating structure.
Carlevaro, Carlos Manuel, Pugnaloni, Luis Ariel, Sánchez, Martín   +2 more
core   +1 more source

The vibration modal characteristics of drillstring in compound drilling

Journal of Physics: Conference Series, 2022
Abstract The compound drilling plays an important role in improving borehole quality. The modal analysis model of drillstring is established to analyze the modal of longitudinal vibration, lateral vibration and torsional vibration, respectively. Compared with longitudinal and torsional vibrations, the intrinsic frequency range of lateral
Heyi Yuan, Guangjian Dong, Yingjie Chen, Qiang Wang, Guangyong Mi   +4 more
openaire   +1 more source

Characteristics Analysis of Joint Acoustic Echo and Noise Suppression in Periodic Drillstring Waveguide

Shock and Vibration, Volume 2014, Issue 1, 2014., 2014
A new method of wireless data telemetry used by oil industry uses compressional acoustic waves to transmit downhole information from the bottom hole to the surface. Unfortunately, acoustic echoes and drilling vibration noises in periodic drillstring are a major issue in transmission performance.
Li Cheng, Chang Jinfeng, Liu Zhao, Fan Shangchun, Ding Tianhuai, Kenneth J. Loh   +5 more
wiley   +1 more source

Analysis of Nonlinear Vibration of Hard Coating Thin Plate by Finite Element Iteration Method

Shock and Vibration, Volume 2014, Issue 1, 2014., 2014
This paper studies nonlinear vibration mechanism of hard coating thin plate based on macroscopic vibration theory and proposes finite element iteration method (FEIM) to theoretically calculate its nature frequency and vibration response. First of all, strain dependent mechanical property of hard coating is briefly introduced and polynomial method is ...
Hui Li, Liu Ying, Wei Sun, Ahmet S. Yigit   +3 more
wiley   +1 more source

Incipient Regimes of Drill Bit Whirlings on Uneven Bottoms of Deep Bore-Holes [PDF]

, 2016
This paper studies the problem of whirl vibrations of rotating drill string bit under conditions of its contact interaction with the bore-hole bottom surface.
Glazunov, Sergiy M., Gulyayev, Valery I., Vashchilina, Olena V.   +2 more
core   +1 more source

Impact Force Magnitude Analysis of an Impact Pendulum Suspended in a Vibrating Structure

Shock and Vibration, Volume 19, Issue 6, Page 1359-1372, 2012., 2012
The purpose of this work is the experimental investigation and the mathematical modeling of the impact force behavior in a vibro‐impact system, where an impact pendulum is mounted on a cart that moves with a prescribed displacement. The dynamics of the system will be evaluated considering different excitation frequencies and changing the impact gap ...
R.R. Aguiar, H.I. Weber
wiley   +1 more source

Investigating Drillstring Vibration and Stability in Coring Drilling

Energies, 2022
Transverse vibration of drillpipe in coring drilling is undesirable. Here, the influence of the core on drillpipe vibration is considered for the first time. Attention is focused on the vibrations of the coring drillpipe as these vibrations lead to contact and collision between drillpipe and core.
Yuchen Sun, Yongsheng Liu, Xing Qin, Zijun Dou, Zibo Feng, Gansheng Yang   +5 more
openaire   +2 more sources

Dynamic analysis of the longitudinal vibration on bottom drilling tools [PDF]

, 2020
With extreme complexity, the drilling process is a dynamic process which is severely influenced by longitudinal vibration. Longitudinal vibration, as one of the most important reason, is directly generated by the fatigue failure of the bottom hole ...
Chunxu Yang, Laiju Han, Qilong Xue, Rui He Wang   +3 more
core   +2 more sources