Results 111 to 120 of about 801 (206)

Numerical Investigation of the Nonlinear Drill String Dynamics Under Stick–Slip Vibration

This paper presents a comprehensive analysis of the influence of rotary table velocity, weight-on-bit, and viscous damping on the drill string stick–slip vibration.
Mohammad Javad Moharrami, Hodjat Shiri, Clóvis de Arruda Martins   +2 more
core   +1 more source

Underreamer mechanics

, 2009
In the oil and gas industry, an underreamer is a tool used to extend and enlarge the diameter of a previously-drilled bore. The problem proposed to the Study Group is to obtain appropriate mathematical models of underreamer dynamics, in forms that will ...
Coskun, Erhan, Richardson, Giles, Lorenz, Maike, Jones, Marvin, Barton, David, Hall, Cameron, Lacey, Andrew, Maringer, Johannes, Please, Colin   +8 more
core  

Longitudinal Harmonic Response Analysis of Drill String in Deep Well by Using ANSYS

, 2013
: With energy consumption and the development of exploitation technology of oil and gas underground, the drilling engineering has developed toward the direction of deep well, even ultra-deep well. The problem of fatigue of drill string has a great effect

core  

Study on mechanical characteristics of anchor drilling rig group for rapid excavating. [PDF]

Sci Rep, 2023
Xie M, Zhang HY, Li YQ, Ren Z, Nie RD.
europepmc   +1 more source

Stability Analysis of the Rotary Drill-String

, 2014
Oil and natural gas are major energy sources for modern society. A rotary drilling system is the best known technology to extract them from underground.
Pan, Liangming
core  

Research on Vibration Reduction, Energy Enhancement, and Speed Increase Methods for Drilling String in Deep Heterogeneous Strata

There are a series of problems in the drilling process of deep heterogeneous formations, such as severe drilling string vibration, slow rock-breaking drilling speed, and the short practical working life of drill bits.
Changchang Chen, Puwei Yu, Guodong Ji, Chenchao Bi, Hong Wang, Yunru Huo   +5 more
core   +1 more source

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

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

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

An integrated model for drill-string dynamics

, 1999
The vibrational states experienced by the active components of a drilling assembly such as that found in the oil or gas industry are discussed in the context of an integrated mathematical model. The work is motivated by the need to understand the complex
Wang, Charles, Tucker, Robin
core  

An Improved Model to Characterize Drill-String Vibrations in Rotary Drilling Applications

Fluid Dynamics & Materials Processing, 2022
Yong Wang, Hongjian Ni, Ruihe Wang, Shubin Liu   +3 more
openaire   +1 more source