Optimal design and nonlinear dynamic characteristics of titanium /steel drill pipe composite drill string for ultra-deep drilling [PDF]
Scientific Reports, 2023 Titanium drill pipe have promising application prospects in ultra-deep drilling, but the nonlinear dynamic characteristics of composite drill strings are very complex.
Qiang Liu +9 more
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Design and Exploitation Problems of Drill String in Directional Drilling [PDF]
Acta Montanistica Slovaca, 2004 Drill string design for directional drilling requires accounting for a number of factors. First, types and expected values of loads should be determined.
Bednarz Stanislaw
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Research of the pulsating flow of drilling fluid in the drill string
Technology audit and production reserves, 2022 The object of research is the pulsating flow of drilling fluid in the drill string. One of the most problematic places is pressure loss due to friction forces distributed along the length of the flow and concentrated in its nodes (threaded joints and pipe bends).
Viktor Svitlytskyi, Irina Boshkova
openaire +4 more sources
On “Lump mass torsional vibration model” and helical deformation of drill string
Petroleum, 2021 This paper analyses the physical models in “Kapitaniak M, Hamaneh VV, Chávez JP, Nandakumar K, Wiercigroch M. Unveiling complexity of drill–string vibrations: experiments and modelling. International Journal of Mechanical Sciences 2015; 101–102: 324–327”.
Zifeng Li
doaj +1 more source
The technology improvement and development of the new design-engineering principles of pilot bore directional drilling [PDF]
, 2007 This paper addresses the effectiveness of impact energy use in pilot bore directional drilling at pipe driving. We establish and develop new design-engineering principles for this method.
Bartsch, Stefan +8 more
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Vibration of Periodic Drill-Strings with Local Sources of Resonance
Vibration, 2021 A new class of drill-strings is proposed for attenuating undesirable vibrations to ensure effective operation. The drill-string is provided with passive periodic inserts, which are integrated with sources of local resonance (LR).
Wael Akl +3 more
doaj +1 more source
Study on dynamic characteristics of drill string in deep-water riserless drilling
Advances in Mechanical Engineering, 2023 The cost and security of ocean drilling are directly related to the efficient exploration and development of ocean resources. The riserless drilling system is usually adopted in the ocean drilling.
Fangfei Huang +4 more
doaj +1 more source
An impedance approach to reduce the contact-instability whilst drilling with active heave compensation [PDF]
, 2012 The bit-bounce, or contact-instability, phenomenon which occurs in the drill string suspended from a floating vessel with an active drill string compensator to maintain a steady weight on the drill bit is investigated.
Dunnigan, Mathew Walter, Hatleskog, Jan
core +1 more source
Energies, 2021 The longitudinal vibration of the drill pipe contains considerable energy which can be used to improve the rock-breaking efficiency during drilling. It is very important to the development of drilling speed-up tools to have a comprehensive understanding ...
Yuqiang Xu +2 more
doaj +1 more source
The impact of vibration mechanism’ installation place on the process of retrieving stuck drill pipe [PDF]
, 2016 Purpose. The present paper studies the dependence of the dynamic oscillatory movements in the area of drill string sticking on the parameters of vibrating mechanism and place of its installation in the heavy weight drill pipe.
Levchuk, K, Moisyshyn, V
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