Results 181 to 190 of about 9,104 (217)

Analysis About Drill String Vibration of Horizontal Well

2009 International Workshop on Intelligent Systems and Applications, 2009
During the engineering of horizontal well, drill string is in the complicated moving state, strong vibration is the main reason that induces drill string failure. Drill string vibrations usually have axial vibration, lateral vibration, torsional vibration and coupling vibration, the drill string near the bottom of well usually vibrates strongly.
Chunjie Han, Tie Yan
openaire   +1 more source

Drill String Vibration: How to Identify and Suppress

Proceedings of Latin American and Caribbean Petroleum Engineering Conference, 1997
Abstract Drill string vibrations can diminish the life of the pipe by accelerating the process of fatigue. Also excessive vibration can cause pipe failure, wash-outs and decrease in the penetration rate. This work describes the first experience in Brazil on identification and suppression of vibrations of the pipe ...
Gabriel P.G. Sotomayor, Joao Carlos Placido, J.C. Cunha   +2 more
openaire   +1 more source

Mitigating borehole drill string torsional vibration and shock

i-manager's Journal on Mechanical Engineering, 2023
This paper provides an analysis of one of the dysfunctions in borehole drill strings, which is torsional vibration. Additionally, an analysis of mitigation through systematic adjustment of the key parameters of Weight on the Bit (WOB) and Rotations per Minute (RPM) is conducted.
openaire   +1 more source

Longitudinal and Angular Drill-String Vibrations With Damping

Journal of Engineering for Industry, 1968
This paper discusses longitudinal and angular drill-string vibrations and supporting field measurements taken with a special downhole recording instrument. Computer programs based on the theory are used to calculate longitudinal and angular vibrations (caused by periodic bit motions) along the drill string; field measurements made during actual ...
D. W. Dareing, B. J. Livesay
openaire   +1 more source

Inverse problems in drill-string torsional vibration

2020
In this study, a method is developed to better model drill-string torsional vibration by using data to calibrate a Partial Differential Equation (PDE) based model. Drill-string vibration is a complex phenomenon that is widely studied with several approaches to model the complexities encountered in real life.
openaire   +2 more sources

Step Change Drilling Technology Modifies Drill String Dynamics and Results in Reduced Drilling Vibrations

SPE Annual Technical Conference and Exhibition, 2013
Abstract Through the years, significant advancements have been achieved with respect to well design, depths drilled, and overall drilling efficiencies. However, in spite of all of these advancements, one major consistent challenge facing the drilling community is the prevalence of downhole vibrations, with specific emphasis on lateral ...
M. Gaines, RD. Morrison, D. Herrington
openaire   +1 more source

Drill-string vibration analysis using non-smooth dynamics approach

Nonlinear Dynamics, 2012
In this work, we model and analyse drill-string vibrations. A special attention is paid to stick-slip and bit-bounce behaviours that are normally treated as the non-smooth dynamics. A two degrees-of-freedom lumped parameters model is employed to account for axial and torsional vibrations based on the model proposed by Christoforou and Yigit (J.
Sandor Divenyi, Marcelo A. Savi, Marian Wiercigroch, Ekaterina Pavlovskaia   +3 more
openaire   +2 more sources

PASSIVE VIBRATION CONTROL OF PERIODIC DRILL STRING

2017
In this dissertation, the stop and pass bands (i.e. the band gaps) characteristics are determined for gyroscopic systems by developing an approach which is compatible with such class of systems which is based on the concept of Bloch wave propagation in periodic structures.
openaire   +2 more sources

Effect of Formations Compressive Strength on Drill String Vibrations

International Petroleum Technology Conference, 2013
Abstract Vibrations are known as destructive loads and thus are leading to downhole fatigue failures, severe bottom hole assembly and bit wear and may cause wellbore instabilities. Downhole measurement of vibrations, however, can provide valuable information about downhole conditions and characteristics of the ...
Abdolali Esmaeili, Behzad Elahifar, Rudolf K. Fruhwirth, Gerhard Thonhauser   +3 more
openaire   +1 more source

About Multi-parametric Analysis of Drill String Vibrations

2014
Coupled flexural-torsional vibrations of drill strings are subject to multi-parametric analysis. A drill string is modelled as a thin elastic beam taking into account the effect of primary static deformation induced by the prescribed compressional force and twisting moment.
Almaz Sergaliyev, Julius Kaplunov, Lelya Khajiyeva   +2 more
openaire   +1 more source