Results 51 to 60 of about 1,054 (134)
Design And Application Of A Drill Pipe Fatigue Test Facility [PDF]
, 2004 This paper reports on the design and application of a fatigue testing facility for drill pipes. A reversed bending load is applied using a rotating drill pipe in a four point static bend arrangement with the possibility of applying an additional static ...
Berezovski, A., Veidt, M.
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Nonlinear rotordynamics of a drillstring in curved wells: models and numerical techniques [PDF]
, 2020 International audienceThe drilling operations for oil or geothermic extraction use a slender structure introduced inside the drill well, hanging from a derrick and driven by a rotary table at the surface.
Andrianoely, Marie-Ange +7 more
core +3 more sources
On shock excitation of shake processes in heavy machines [PDF]
, 2014 Представлена математична модель, яка описує динамічні процеси в механізмах важких машин, збуджених співударяннями суміжних ланок у зв’язку з наявністю зазорів та інших елементів з зоною нечутливості або негладкості кінематичних передаточних функцій ...
Lisyuk, D. +5 more
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, 2016 International audienceThis paper presents a robustness result for the use of a previously developed adaptive output-feedback controller designed for a pure wave PDE.
Bresch-Pietri, Delphine +3 more
core +3 more sources
Real-time detection of drilling problems & issues during drilling by listing & using their signs both on the surface and downhole [PDF]
, 2023 Olje- og gassindustrien er allment anerkjent som en av de farligste sektorene globalt. Prosessen med å utvinne hydrokarboner fra underjordiske reservoarer innebærer betydelige risikoer og usikkerheter.
Hafezi, Salar
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Theory of differential inclusions and its application in mechanics
, 2018 The following chapter deals with systems of differential equations with discontinuous right-hand sides. The key question is how to define the solutions of such systems.
A Andronov +61 more
core +1 more source
Комп'ютерне моделювання коливань кружляння доліт бурильних колон у глибоких свердловинах [PDF]
, 2013 У статті розглянуто задачу комп’ютерного моделювання коливань кружляння долота бурильної колони, що обертається, в умовах його фрикційної взаємодії з поверхнею вибою свердловини, проаналізовано механізм можливого чистого кочення без ковзання та обертання
Гайдайчук, В. В. +2 more
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Maximizing the value of information from high-frequency downhole dynamics data [PDF]
, 2017 Downhole drilling dynamics are poorly understood. Neither models nor experiments seem capable of fully describing the movements and forces of the drillstring during drilling. Downhole measurements could potentially hold the key to those missing insights,
Baumgartner, Theresa Helene
core +1 more source
The validation of metaphors [PDF]
, 1998 In this paper we introduce models as metaphors for the description of reality We consider a number of case studies of contemporary research pollution of the NorthSea the ow eld of theWadden Sea drillstring dynamics the use of metaphors in ...
Verhulst, F.
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Hydromechanical method of control of drillstring torsional vibrations
Journal of Physics: Conference Series, 2020 Abstract The article discusses issues related to the vibrations of drillstring (DS). The relevance of the fight against torsional fluctuations DS and the reasons for their occurrence are analyzed. The hydromechanical method of control of torsional oscillations DS and device for its implementation is proposed. This method is characterized
K, A Bashmur +6 more
openaire +2 more sources