Results 1 to 10 of about 130 (95)
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 ...
Xiaohua Zhu, Liping Tang
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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
Gexue Ren, Jianliang Zhou
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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.
Xiaohua Zhu, Yun-Lai Zhou, Liping Tang
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
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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
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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
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Analysis of the Effect of Whirl on Drillstring Fatigue
Shock and Vibration, 2021 There are many kinds of vibration forms of drillstring in petroleum drilling. Whirl is one of the main vibration modes when drilling tools are drilling, and it is also the main reason of fatigue failure of the drillstring.
Chong Wang +4 more
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IEEE Access, 2023 A detailed methodology to develop a digital twin has many useful applications in the era of technology 4.0. This study provides a framework to develop a digital twin for vibration prediction and fatigue life prognosis of a vertical oil well drillstring ...
Mihiran Galagedarage Don, Geoff Rideout
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Analysis on the lateral vibration of drill string by mass effect of drilling fluid [PDF]
Mechanical Sciences, 2019 It is well known that the influence of the internal and external drilling fluid on the lateral vibration characteristics of drillstring cannot be ignored. In this paper, experiment apparatus for simulating drillstring vibration was established. Hammering
C. Yang +4 more
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Shock and Vibration, 2021 High-frequency measurements can provide much more new insights for drillstring dynamics compared to traditional instruments, leading to a new realm of understanding of drillstring behaviors in great detail than before.
Lixin Li +6 more
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