Results 151 to 160 of about 6,935 (243)

Stick-Slip Vibration Suppression in Drill String Using Observer-Based LQG Controller. [PDF]

Sensors (Basel), 2022
Riane R, Doghmane MZ, Kidouche M, Tee KF, Djezzar S.   +4 more
europepmc   +1 more source

Cosmic necklaces in string theory and field theory

, 2010
PhDIn this thesis we investigate astrophysical phenomena which arise in models with compact extra dimensions, focussing on the cosmological consequences of strings which wrap cycles in the internal space. Embedding our strings in the Klebanov-Strassler
Lake, Matthew James
core  

Analysis of the effect of stabilizer configuration on reamer vibration suppression. [PDF]

Sci Prog
Yu F, Kuang Y, Li B.
europepmc   +1 more source

A Temperature Compensation Method for the Bit Parameter Recorder in High-Temperature Deep Wells Based on Thermo-Mechanical Coupling. [PDF]

Sensors (Basel)
Zhang H, Yi Z, Li Z, Li Y, Zhu Y.
europepmc   +1 more source

An equivalent circulating density prediction model for extended-reach horizontal wells considering drill strings sinusoidal buckling. [PDF]

Sci Rep
Huang Z, Li Y, Jiang K, Ge J, Gu Y, Hu Z.   +5 more
europepmc   +1 more source

A comprehensive model of drill-string dynamics using Cosserat rod theory

, 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  

Recent Advances in Thermally Insulated Drilling Pipes: Materials, Design Strategies, and Future Directions. [PDF]

Polymers (Basel)
Ali I, Khan MA, Ding Y, Liu C, Li MC.
europepmc   +1 more source

Intelligent Interface Detection of Frozen Rock Masses Using Measurement While Drilling Data and Change-Point Analysis. [PDF]

Sensors (Basel)
Gao F, Chen H, Wu X, Zhai H, Mu Y.
europepmc   +1 more source

Drill String Modeling and Stress Analysis

, 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  

Multiphase Transient Flow in Wellbore during Shallow Hydrate Reservoir Drilling in Deep Water. [PDF]

ACS Omega
Yin B, Chen C, Feng K, Liu S, Ren M, Wang Z, Sun B.   +6 more
europepmc   +1 more source