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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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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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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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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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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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Feasibility study of a hand guided robotic drill for cochleostomy [PDF]
, 2014 The concept of a hand guided robotic drill has been inspired by an automated, arm supported robotic drill recently applied in clinical practice to produce cochleostomies without penetrating the endosteum ready for inserting cochlear electrodes. The smart
Reid, Andrew +11 more
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Analysis of Drill String Coupled Vibration and Drilling Fluid Pressure in Downhole Section
Shiyou jixie, 2021 To address the problem of nonlinear coupled vibration of the drill string in the axial, lateral and torsional direction in the downhole section of deepwater drilling, a mathematical model of nonlinear coupled vibration of the drill string in the downhole
Liu Jing +5 more
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Inverse problems in drill-string torsional vibration [PDF]
, 2021 In this study, a method is developed to better model drill-string torsional vibration by using data to calibrate a Partial Differential Equation (PDE) based model.
Alrasheed, Abdulmalik
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Petroleum Exploration and Development, 2018 Drill string will sustain large uplift force during the shut-in period after gas overflow in an ultra-deep well, and in serious case, it will run out of the wellhead.
Hu YIN +4 more
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