Results 191 to 200 of about 9,449 (231)
Some of the next articles are maybe not open access.
Guidelines for Controlling Drill String Vibrations
Journal of Energy Resources Technology, 1984Bottom-hole assemblies control the vibration response of drill strings because they are much heavier and stiffer than drill pipe. The length of bottom-hole assemblies is also a factor and the present practice of determining drill collar length often leads to natural tuning with drill bit displacement frequencies. As a result, bottom-hole assemblies are
openaire +1 more source
The Use of Aluminum Drill Pipe for Damping Drill String Vibrations
SPE Norway One Day Seminar, 2018Abstract Drill string vibrations are a significant concern during drilling operations, and are a common cause of downhole tool failures and decreases in drilling efficiency. Drill string vibrations are typically categorized in three ways: axial (the drill string is vibrating along the axis of drilling), lateral (the drill string is ...
Christian F. Brown +4 more
openaire +1 more source
Analysis About Drill String Vibration of Horizontal Well
2009 International Workshop on Intelligent Systems and Applications, 2009During 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, 1997Abstract 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 +2 more
openaire +1 more source
Mitigating borehole drill string torsional vibration and shock
i-manager's Journal on Mechanical Engineering, 2023This 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, 1968This 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
2020In 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
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
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, 2012In 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 +3 more
openaire +2 more sources
Effect of Formations Compressive Strength on Drill String Vibrations
International Petroleum Technology Conference, 2013Abstract 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 +3 more
openaire +1 more source