Results 231 to 240 of about 2,447 (252)

A nonlinear dynamic model for characterizing downhole motions of drill-string in a deviated well

Journal of Natural Gas Science and Engineering, 2017
Yongsheng Liu
exaly  

The visualization of rub-impact characteristics of drill string on casing

Journal of Petroleum Science and Engineering, 2019
Feifei Hu
exaly  

Dynamics of a distributed drill string system: Characteristic parameters and stability maps

Journal of Sound and Vibration, 2018
Ulf Jakob Flø Aarsnes, Nathan Van De Wouw   +1 more
exaly  

Drilling system with drill string valves

2012
DOLMAN LEE F, JEFFRYES BENJAMIN P, JOHNSON ASHLEY B, CLARK BRIAN, MCCULLAGH JOHN A   +4 more
openaire   +1 more source

Axial and torsional self-excited vibrations of a distributed drill-string

Journal of Sound and Vibration, 2019
Ulf Jakob Flø Aarsnes, Nathan Van De Wouw   +1 more
exaly  

The transient impact of the resonant flexible drill string of a sonic drill on rock

International Journal of Mechanical Sciences, 2017
Peida Hu
exaly  

Drilling wellbores with optimal physical drill string conditions

2006
BALLANTYNE RAY, NEUBERT MICHAEL, MATHISZIK HOLGER   +2 more
openaire   +2 more sources

Device for steering a drilling tool and/or drill string

1990
COLTMAN TREVELLYN M, FLETCHER ALFRED E W, PREVEDEL BERNHARD   +2 more
openaire   +1 more source

Drill string stabilizer

1989
openaire   +1 more source

Steering drill string

1982
openaire   +1 more source