Results 61 to 70 of about 875 (185)

Drill String Drag and Torque Test Device Design

Shiyou jixie, 2019
The existing drag and torque theoretical model has many assumptions, leading to a large difference between the calculated value and the true value, which seriously restricts the study of the mechanical behavior of the drill string and the optimization of
吴泽兵, 吕澜涛, 郭龙龙, 王文娟, 张帅   +4 more
doaj  

Vibration wave characteristics in Conventional and Periodic Drill string models [PDF]

, 2016
Drill string models are of two major types- Conventional and Periodic. Conventional drill string models are widely used due to their simplicity in manufacturing and dynamics analysis.
Sassi, Sadok, Sadok Sassi, Fesmi Abdul Majeed, Abdul Majeed, Fesmi   +3 more
core   +1 more source

Combining Formation Seismic Velocities while Drilling and a PDE-ODE observer to improve the Drill-String Dynamics Estimation [PDF]

, 2020
International audienceIn this paper we consider the axial motion of a drill-string and the interaction of the drill-bit with the formation. We design an observer that estimates, in real time, the axial speed and force along the drill-string and at the ...
Auriol, Jean, Shor, Roman, Nasser Kazemi, Innanen, Kristopher, Kristopher Innanen, Roman J. Shor, Kazemi, Nasser, Jean Auriol   +7 more
core   +1 more source

The effect of high-frequency torsional impacts on the dynamic response of a drill string in a stick state

Advances in Mechanical Engineering, 2019
Stick–slip vibration is common in the oil well drilling process and is detrimental to down-hole equipment and drilling efficiency. In recent years, a new type of drilling technology, torsional impact drilling, has been developed to mitigate the stick ...
Liping Tang, Wei He, Xiaohua Zhu
doaj   +1 more source

Using Targeted Energy Transfer to Stabilize Drill-string Systems [PDF]

, 2007
Torsional vibration of the drill strings used in drilling oil and gas wells arises from a complex interaction of the dynamics of the drilling structure with speed-dependent effective rock-cutting forces.
Golinval, J.C., Bergman, L.A., Vakakis, AF, Vakakis, A.F., Vakakis, Alexander F., Golinval, JC, Viguie, R., Viguié, Régis, McFarland, DM, Wouw, van de, N., Kerschen, G., Viguie, R, Kerschen, G, Van De Wouw, N, Bergman, LA, McFarland, D.M., Bergman, Lawrence A., Kerschen, Gaëtan, van de Wouw, N., Golinval, Jean-Claude   +19 more
core  

Study on Nonlinear Dynamics Collision of Drill String and Rock Based on ANSYS/LS-DYNA [PDF]

, 2011
In the process of drilling well, the kinematics of drill string is quite complicated. The drill string not only vibrates in longitudinal, transverse and torsional direction, but also random impacts and contacts well wall.
Shang Yu Yang, Xiu Juan Yang, Xiang Zhen Yan   +2 more
core   +1 more source

Drill-String Torsional Vibration Suppression Using GA Optimized Controllers [PDF]

, 2009
Failure of drill-strings is very costly in terms of money and time and occurs more frequently than oil companies would like to see. There are many reasons for drill-string failure, such as vibration, fatigue, and buckling.
Y.L. Abdel-Magid, M. Karkoub, B. Balachandran   +2 more
core   +1 more source

Fluid–Structure Interaction Study in Unconventional Energy Horizontal Wells Driven by Recursive Algorithm and MPS Method

Applied Sciences
With the unconventional energy sector (e.g., shale gas) increasingly focused on precision drilling and cost-effective extraction, slim-hole horizontal well technology is gaining prominence.
Xikun Gao, Dajun Zhao, Yi Zhang, Yong Chen, Zhanzhao Gao, Xiaojiao Zhang, Shengda Wang   +6 more
doaj   +1 more source

CFD Analysis of Pressure Losses and Deposition Velocities in Horizontal Annuli

International Journal of Chemical Engineering, 2019
Estimation of pressure losses and deposition velocities is vital in the hydraulic design of annular drill holes in the petroleum industry. The present study investigates the effects of fluid velocity, fluid type, particle size, particle concentration ...
Rasel A. Sultan, Mohammad Azizur Rahman, Sayeed Rushd, Sohrab Zendehboudi, Vassilios C. Kelessidis   +4 more
doaj   +1 more source

Nonlinear Dynamics of a Rotary Drill-String Immersed in a 3D Geometry Well [PDF]

, 2018
10th International Conference on Rotor Dynamics, Rio de Janeiro, BRAZIL, SEP 23-27, 2018International audienceOil or geothermic rotary drilling is composed with a very slenderness drill-string which is subjected in particular to the tool-bit excitations.
Regis Dufour, Tran, Quang Thinh, Lionel Manin, K.-L. Nguyen, Menand, Stéphane, Andrianoely, Marie-Ange, M.-A. Andrianoely, Dufour, Régis, Nguyen, Khac-Long, Q.-T. Tran, Stephane Menand, Baguet, Sébastien, Sebastien Baguet, Manin, Lionel   +13 more
core   +1 more source