Spectral Analysis of the Infinite-Dimensional Sonic Drillstring Dynamics
Mathematics, 2023 By deploying sonic drilling for soil structure fracturing in the presence of consolidated/ unconsolidated formations, this technique greatly reduces the friction on the drillstring and bit by using energetic resonance, a bit-bouncing high-frequency axial
Kaïs Ammari, Lotfi Beji
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Fault diagnosis of downhole drilling incidents using adaptive observers and statistical change detection [PDF]
, 2015 Downhole abnormal incidents during oil and gas drilling cause costly delays, and may also potentially lead to dangerous scenarios. Different incidents will cause changes to different parts of the physics of the process. Estimating the changes in physical
Blanke, Mogens +3 more
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Nonlinear Dynamics in Drilling Engineering
, 2021 Shock and Vibration, Volume 2021, Issue 1, 2021.
Qilong Xue +3 more
wiley +1 more source
Characteristics of Metal Magnetic Memory Testing of 35CrMo Steel during Fatigue Loading
Metals, 2018 The fatigue fracture of a drillstring could cause drilling disturbances and some negative impacts (e.g., economic loss) will be brought when restoring the drillstring to functionality.
Zhibin Hu +4 more
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Journal of Earth Energy Engineering, 2021 Drillstrings often vibrate severely and tend to twist off during hard rock drilling. Therefore, dynamic testing is crucial in the design of drilling systems. Designers tend to employ the most powerful analytical tools, using the most elaborate electronic
Mejbahul Sarker
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Predicting remaining lifetime of drill pipes basing upon the fatigue crack kinetics within a pre-critical period [PDF]
, 2019 Purpose is to determine regularities of the development of corrosive fatigue cracks in terms of high-strength drill pipes. Methods. Basing upon the approaches of the material failure mechanics, the crack has been characterized by the area that is the ...
Moisyshyn, V, Tyrlych, V
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Reduced basis method for managed pressure drilling based on a model with local nonlinearities
International Journal for Numerical Methods in Engineering, Volume 121, Issue 23, Page 5178-5199, 15 December 2020., 2020 Abstract To circumvent restrictions of conventional drilling methods, such as slow control actions and inability to drill depleted reservoirs, a drilling method called managed pressure drilling (MPD) has been developed. In MPD, single‐phase flow processes can be modeled as a feedback interconnection of a high‐order linear system and a low‐order ...
Mohammad Hossein Abbasi +4 more
wiley +1 more source
Dynamic Analysis of a Drillstring-Riser System Drilling in Deep Water
MATEC Web of Conferences, 2018 A mathematical model of a drillstring-riser system is developed to analyze the system dynamics when drilling in deep water. For the proposed model, a riser and a drillstring are combined as a pipe-in-pipe structure, along which the interactions between ...
Liao Maolin +4 more
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A multibody dynamic model of the drilling system with drilling fluid
Advances in Mechanical Engineering, 2016 This article is intended to present a multibody dynamic model of the drilling system, consisting of drillstring and drilling fluid. The drillstring is a complex rigid–flexible coupling system, including rigid bodies, Euler–Bernoulli beam elements ...
Yanhui Ma +4 more
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State Dependent Delayed Drill-string Vibration : Theory, Experiments and New Model [PDF]
, 2017 L.J. Pei would like to acknowledge NNSF of China (No.
Kapitaniak, Marcin Tomasz +4 more
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