Results 91 to 100 of about 9,104 (217)
Xibei Gongye Daxue Xuebao, 2019 Exploration of oil or gas wells is usually carried out by using drilling system. When the kilometers of drilling system is externally disturbed, the drilling system is prone to undesired stick-slip vibration of the drill-string.
doaj +1 more source
Самовозбуждение крутильных колебаний колонн глубокого бурения [PDF]
, 2009 Поставлена задача о самовозбуждении упругих волновых крутильных колебаний вращающейся бурильной колонны в результате фрикционного взаимодействия ее долота со скальной породой на дне глубокой скважины.
Гуляев, В.И. +2 more
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Wear resistance of some elements of the drill string during drilling [PDF]
, 2013 The article is concerned with questions of wearing capacity of some elements of the drill string, including the abrasive drilling of hard-alloy insert rolling cutter drilling bits.
Gogol, V. I. +2 more
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, 2014 The present paper is concerned with the formulation of new assembly methods of bi-material tensegrity prisms, and the experimental characterization of the compressive response of such structures.
Amendola, Ada +4 more
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An efficient model of drillstring dynamics [PDF]
, 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
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Maximum, Minimum, and Current Temperature Protocol [PDF]
, 2003 The purpose of this activity is to measure air (and optionally soil) temperature within one hour of solar noon and the maximum and minimum air temperatures for the previous 24 hours. Intended outcomes are that students will learn to read minimum, maximum,
The GLOBE Program, UCAR (University Corporation for Atmospheric Research)
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Identifying the Optimum Zone for Reducing Drill String Vibrations [PDF]
SPE Annual Technical Conference and Exhibition, 2017 Abstract Drilling operators witness significant lost time due to early failure of bottomhole equipment resulting from vibration and shock. This eventually leads to cumulative losses of millions of dollars for the industry. Increase in applied weight on bit (WOB) at low angular velocity (RPM) can trigger instabilities leading to stick ...
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Torsional stick-slip vibrations and multistability in drill-strings
Applied Mathematical Modelling, 2019 El modelo generalizado de parámetros concentrados del sistema de sarta de perforación se estudia en este documento para proporcionar una comprensión fundamental de las vibraciones torsionales de palillo-deslizamiento en la perforación de fondo de pozo.
Yang Liu +3 more
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Axial Vibration Analysis on Drillstring [PDF]
, 2015 The problem of drill string vibration occurs in drilling operations and it will affect the usage life of drill pipe and drill bits. Three types of vibration, which are axial, lateral and torsional vibrations exist in the drill string.
HOW, KEK JIA
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Study on lateral vibration characteristics of BHA with double-span drill collar
Advances in Mechanical EngineeringThe severe vibration of BHA directly affect the drilling efficiency, borehole trajectory, and wellbore quality. Therefore, it is crucial for developing dynamic mechanics of drill string system by studying the mechanical behavior of BHA.
Zuwen Tao +7 more
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