Results 11 to 20 of about 69,267 (280)
Energy Reports, 2023 Large amplitude and high frequency WOB (weight on bit) fluctuation will lead to problems such as low rock breaking efficiency, short service life and slow drilling speed. This problem is particularly prominent in hard and difficult to drill formation and
Liu Yongwang +5 more
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Helical Buckling of Drill-Strings [PDF]
MATEC Web of Conferences, 2018 This paper presents experimental and numerical investigations of the complex drill-string vibration, with particular attention to the helical buckling of drill-strings and its influence on the system dynamics. The analysis is conducted using a novel experimental drilling rig, capable of exhibiting of all major types of drill-string vibration, including
Kapitaniak, Marcin +2 more
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On physical models in V.I. Gulyayev's three papers on drill string whirling and torsional vibrations
Petroleum, 2020 This paper introduces physical models of drill string whirling and torsional vibrations and analyses the physical models in V.I. Gulyayev's three papers on drill string whirling and torsional vibrations: “V.I. Gulyayev, L.V.
Zifeng Li, Chaoyue Zhang, Guangming Song
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DRILL COLLAR STRING DESIGN AND ITS EFFECT ON DRILLING M.E.R. [PDF]
Proceedings of Drilling and Rock Mechanics Symposium, 1963 The problem of obtaining a Maximum Economic Rate of drilling is the main task of engineers, tool pushers, superintendents, field drilling foremen and people involved in drilling research problems. A rig drilling at its Maximum Economic Rate will always make hole at a rate less than the maximum rate of penetration.
Fred K. Fox, Nadim Nasir
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Effect of Annular Gas-Liquid Two-Phase Flow on Dynamic Characteristics of Drill String
Shock and Vibration, 2021 Natural gas hydrate (NGH) is a kind of new type green energy source with giant reserves which has been thought of highly by energy explorers in the world.
Baojin Wang +3 more
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THE EFFECT OF THE ANISOTROPY DRILLING INDEX ON THE DEVIATION OF THE WELL AXIS FROM THE DESIGN PROFILE [PDF]
, 2017 Analytical studies of the interaction of the load on the bottom and the bottom hole assembly of the drill string with the bottom itself and the wall of the well during drilling tilted formations have been carried out.
Dobrutsky, R. L. +2 more
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Vibration and Control Characteristics of Downhole Drill String System
Shiyou jixie, 2022 Stick slip vibration seriously affects the life of drill string system,prolongs the drilling cycle,and endangers the safety of staff.In order to solve the problem of stick slip vibration caused by linear torque load and friction load in drilling ...
Ma Sunan +6 more
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Shiyou jixie, 2022 In deepwater riserless drilling system,drill string in seawater is affected by external ocean load,torque of top rotary table and bottom bit-formation force,so it is prone to vibrate in the three directions of longitudinal,transverse,and torsional,making
Liu Jun +3 more
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Drilling String Vibration: Modelling and Simulation
Volume 11A: Honoring Symposium for Professor Carlos Guedes Soares on Marine Technology and Ocean Engineering, 2018 The offshore industry has a significant impact on the global economy and it is expected to grow over the next 4 years. A crucial part of an offshore structure is the drill string. Drill strings can be seriously damaged by vibration during drilling operations. The control of vibrations in drill strings is essential.
Amat, Sergio +2 more
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Shock and Vibration, 2016 Comparative analysis whether considering the lateral inertia or not, aiming at the longitudinal vibration of the drill string in drilling progress, is proposed.
Jialin Tian +5 more
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