Results 21 to 30 of about 643,401 (321)
Helical Buckling of Drill-Strings [PDF]
MATEC Web of Conferences, 2018 This paper presents experimental and numerical investigations of the complex drill-string vibration, with particular attention to the helical buckling of drill-strings and its influence on the system dynamics. The analysis is conducted using a novel experimental drilling rig, capable of exhibiting of all major types of drill-string vibration, including
Kapitaniak, Marcin +2 more
openaire +3 more sources
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
Effect of Annular Gas-Liquid Two-Phase Flow on Dynamic Characteristics of Drill String
Shock and Vibration, 2021 Natural gas hydrate (NGH) is a kind of new type green energy source with giant reserves which has been thought of highly by energy explorers in the world.
Baojin Wang +3 more
doaj +1 more source
Mechanical Modelling of Drill‐Strings [PDF]
PAMM, 2003 AbstractVibrations in long torsional strings result in spatio‐temporal dynamics. These vibrations disturb the accuracy of the drilling process and may cause damage due to fatigue. The high costs of drillings are the main motivation for the suppression of vibrations of the drill–string. In this paper a model for the drill string is proposed. In order to
E. Kreuzer, H. Struck
openaire +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
, 2006 Operations Mobilization of Vidar Viking, Aberdeen, ScotlandThe Vidar Viking came under contract on 22 July 2004, when mobilization began in Aberdeen, Scotland.
Backman, J. +30 more
core +1 more source
Vibration and Control Characteristics of Downhole Drill String System
Shiyou jixie, 2022 Stick slip vibration seriously affects the life of drill string system,prolongs the drilling cycle,and endangers the safety of staff.In order to solve the problem of stick slip vibration caused by linear torque load and friction load in drilling ...
Ma Sunan +6 more
doaj
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. +2 more
core +1 more source
Effect of vibration dampers on the dynamic state of a drill string
Technology audit and production reserves, 2023 The object of research is the drill string bottom structure using the correcting devices of drilling modes to control the dynamics of the drill string. The work is aimed at the study of longitudinal, torsional and transverse oscillations when adjusting ...
Viktor Svitlytskyi +2 more
semanticscholar +1 more source
Shiyou jixie, 2022 In deepwater riserless drilling system,drill string in seawater is affected by external ocean load,torque of top rotary table and bottom bit-formation force,so it is prone to vibrate in the three directions of longitudinal,transverse,and torsional,making
Liu Jun +3 more
doaj