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Push-and-Twist Drillstring Assemblies [PDF]
Earth and Space 2016, 2017 Deep drilling using a rigid drillstring requires the assembly and disassembly of multiple drill pipes. The interfaces between these pipes provide a challenge for automation because they must transmit large drilling forces and movements while, at the same
Firstbrook, David G. +5 more
core +3 more sources
An efficient model of drillstring dynamics [PDF]
Journal of Sound and Vibration, 2015 This is the author accepted manuscript. The final version is available from Elsevier via http://dx.doi.org/10.1016/j.jsv.2015.06.033High amplitude vibration regimes can cause significant damage to oilwell drillstrings: torsional stick-slip oscillation ...
Butlin, T, Langley, RS
core +4 more sources
Effects of axial impact load on the dynamics of an oilwell drillstring
Advances in Mechanical Engineering, 2019 This article studies the dynamics of oilwell drillstring under large and small axial impact loads. For the case of large impact load, the drillstring is regarded as a continuous bar under the impact load of a falling mass, and the energy conservation ...
Liping Tang, Xiaohua Zhu
exaly +2 more sources
Advances in Mechanical Engineering, 2015 This article models the contact between the drillstring with large slenderness ratio and the extending rigid wellbore based on the multibody dynamics method. The drillstring is modeled as absolute nodal coordinate formulation beams with contact detection
Jianliang Zhou, Gexue Ren
exaly +2 more sources
Stick–slip vibrations in oil well drillstring: A review
Journal of Low Frequency Noise Vibration and Active Control, 2020 A survey of the literature related to theoretical and experimental studies on stick–slip vibration in oilwell drillstring is carried out in this study. It aims to explain key concepts and present the existing methods for studying this phenomenon.
Liping Tang +2 more
exaly +2 more sources
Flow Field and Pressure Loss Characteristics at Rotary Drillstring Joints
Geofluids, 2023 A thorough understanding and accurate calculation of the annulus pressure losses are paramount to drilling design and construction. However, due to the influence of the drillstring rotation and the abrupt dimensional variation at the joint, it is ...
Minghu Nie +5 more
doaj +1 more source
Nonlinear Drillstring Dynamics Analysis [PDF]
SIAM Journal on Applied Dynamical Systems, 2009 This paper studies the dynamical response of a rotary drilling system with a drag bit, using a lumped parameter model that takes into consideration the axial and torsional vibration modes of the bit. These vibrations are coupled through a bit-rock interaction law.
Germay, Christophe +3 more
openaire +1 more source
Drillstring Failure: Analytical and Experimental Approach [PDF]
MATEC Web of Conferences, 2019 Drilling is one of the costliest activities in oil and gas industry due to the complexity of interactions with downhole rock formation. Under such conditions, the uncertainty of drillstring behaviour increase and hence it becomes difficult to predict the
Hassan Edris +3 more
doaj +1 more source
Finite Element Modeling of Drillstrings [PDF]
Mathematical and Computational Applications, 1996 A finite element model is presented for investigating dynamic behavior of drillstrings used in oil and gas wells. A Timoshenko beam element is used to model axial and transverse vibrations. The effect of axial load, gravity, the constraints due to stabilizers are considered.
A. Yigit, M. Al-Ansary, M. Khalid
openaire +2 more sources
Drillstring Oscillations: The Influence of Fluid Loading and Stabilizer Effects
Shock and Vibration, 2021 Drillstring vibrations can be undesirable for drilling operations. Here, attention is focused on vibrations of the upper portion of a drillstring as these vibrations can cause drillpipe wear and casing wear.
Yongsheng Liu +4 more
doaj +1 more source