Results 81 to 90 of about 875 (185)
Open EngineeringTorsional vibrations in lumped drill strings pose a significant challenge in oil and natural gas exploration drilling, often leading to detrimental phenomena such as stick-slip.
Tuama Dina Hameed +3 more
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Axial-torsional nonlinear vibration of bottom hole assembly in the air drilling technology
PetroleumThe safety and efficiency of drilling engineering are greatly impeded by destructive vibrations of drill string in air drilling, such as stick-slip, bit-bounce and their coupled vibrations. To avoid or suppress these vibrations improving the stability of
Shujie Ding +7 more
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A comprehensive model of drill-string dynamics using Cosserat rod theory [PDF]
, 2011 The drill-strings used in drilling operate under extreme condi-tions, therefore, an accurate understanding of their dynamics is necessary and has attracted much interest.
Silveira, Marcos
core
Drill String Modeling and Stress Analysis [PDF]
, 2012 The unsupported deflection of drill strings which are subjected to increasing gravitational loading and distortion, with borehole depth and twisting, is considered.
Abdul-Ameer, A.
core
Investigation of drill string dynamics using probabilistic methods
Technology audit and production reservesThe object of research is a drill string. The work is directed to the study of the drill string dynamics and its influence on the rock, which is drilled using probabilistic methods. It is shown that the nature of the vibrations of the top of the drill string and the downhole signals are different and have a stationary random character.
Viktor Svitlytskyi +2 more
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Study on Dynamic Characteristics of drill String-drill Bit-rock System
Shiyou jixie, 2017 Drill bit, drill string and rock system as a whole, has coupled and interacted dynamic characteristics, which is neglected in most of researches. In view of this, considering the coupling of axial and lateral torsion of the lower drilling tool and the ...
Hu Zhiqiang +3 more
doaj
Optimal bit selection for large-diameter wellbore drilling in an ultra-deep well
Petroleum Exploration and DevelopmentTo optimize the bit selection for large-diameter wellbore in the upper section of an ultra-deep well S-1, a full-well dynamic model integrating drill string vibration and bit rock-breaking was established and then verified using measured vibration data ...
Lili CHEN +7 more
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Buckling and dynamic analysis of drill strings for core sampling [PDF]
, 1996 This supporting document presents buckling and dynamic stability analyses of the drill strings used for core sampling. The results of the drill string analyses provide limiting operating axial loads and rotational speeds to prevent drill string failure, instability and drill bit overheating during core sampling. The recommended loads and speeds provide
openaire +2 more sources
Design Method of Adaptive Drilling Stick-Slip Vibration Downhole Control Tool
Shiyou jixieThere are few reports on the design method for downhole stick-slip vibration adaptive prevention and control tool， and the key parameter design models and methods are not yet perfect.
Zhou Bo +5 more
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Frontiers in Mechanical EngineeringThis review presents a structured synthesis of recent advances in condition monitoring, fault diagnosis, and control of industrial drilling systems, with emphasis on rotary and rotary-percussive drilling.
Satyam Paul, Magnus Löfstrand
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