Results 21 to 30 of about 69,267 (280)

Incipient Regimes of Drill Bit Whirlings on Uneven Bottoms of Deep Bore-Holes [PDF]

, 2016
This paper studies the problem of whirl vibrations of rotating drill string bit under conditions of its contact interaction with the bore-hole bottom surface.
Glazunov, Sergiy M., Gulyayev, Valery I., Vashchilina, Olena V.   +2 more
core   +1 more source

Use of the energy of parametric oscillations to improve drilling indices [PDF]

, 2011
Purpose. Increase of the efficiency of using energy of parametric oscillations within the assembly of drilling string bottom by means of solving nonlinear-parametric equations of a “bit – drive motor – drilled-out rock” system to improve drilling indices.
Bakenov, Chernin, Depouhon, Eren, Ghasemloonia, Ghasemloonia, Gibbs, Heisig, Khajiyeva, Parsian, Patil, Saldivar   +11 more
core   +2 more sources

Analysis of Drill String Coupled Vibration and Drilling Fluid Pressure in Downhole Section

Shiyou jixie, 2021
To address the problem of nonlinear coupled vibration of the drill string in the axial, lateral and torsional direction in the downhole section of deepwater drilling, a mathematical model of nonlinear coupled vibration of the drill string in the downhole
Liu Jing, Wang Chuan, Hao Chen, Du Qingyun, Wang Tao, Zhang Cheng   +5 more
doaj  

Mechanical Modelling of Drill‐Strings [PDF]

PAMM, 2003
AbstractVibrations in long torsional strings result in spatio‐temporal dynamics. These vibrations disturb the accuracy of the drilling process and may cause damage due to fatigue. The high costs of drillings are the main motivation for the suppression of vibrations of the drill–string. In this paper a model for the drill string is proposed. In order to
E. Kreuzer, H. Struck
openaire   +1 more source

Mechanism and prevention method of drill string uplift during shut-in after overflow in an ultra-deep well

Petroleum Exploration and Development, 2018
Drill string will sustain large uplift force during the shut-in period after gas overflow in an ultra-deep well, and in serious case, it will run out of the wellhead.
Hu YIN, Menghan SI, Qian LI, Hongwei JANG, Liming DAI   +4 more
doaj   +1 more source

Stability Analysis and Visual Application of Drill String Drag and Torque Test Device

Shiyou jixie, 2021
The nonlinear buckling of the drill string during drilling affects the safe and stable operation of the drag and torque test device. For the horizontal well drag and torque test device, based on the dynamic software ADAMS, combined with the force balance
Wu Zebing, Zhang Wenchao, Huang Hai, Zhou Kefei, Zhao Haichao, Zheng Weixin   +5 more
doaj  

State Dependent Delayed Drill-string Vibration : Theory, Experiments and New Model [PDF]

, 2017
L.J. Pei would like to acknowledge NNSF of China (No.
Kapitaniak, Marcin Tomasz, Krishnan, Nandakumar, Pei, Lijun, Vaziri, Vahid, Wiercigroch, Marian   +4 more
core   +1 more source

Research on Mechanism of Stick-Slip Vibration Induced by Friction between Drill String and Borehole Wall in Horizontal Well

Shiyou jixie, 2021
The stick-slip vibration of the horizontal well drill string system seriously threatens the safety of downhole drill strings and tools, reduces the drilling efficiency of the horizontal section, making the drill bit fail prematurely.
Zhu Jieran, Zou Deyong, Li Guangquan, Yang Ningning, Yang Quanjin, Lin Wei   +5 more
doaj  

Drill string dynamic characteristics simulation for the ultra-deep well drilling on the south margins of Junggar Basin

Petroleum, 2023
Improper drilling parameters may cause severe vibration of drill string which leads to reduce the rate of penetration and drilling tool premature failure accidents in the drilling process of ultra-deep well.
Yuan Li, Jianggang Shi, Minghu Nie, Chi Peng, Yingjie Wang   +4 more
doaj   +1 more source

Sites M0001–M0004 [PDF]

, 2006
Operations Mobilization of Vidar Viking, Aberdeen, ScotlandThe Vidar Viking came under contract on 22 July 2004, when mobilization began in Aberdeen, Scotland.
Backman, J., Brinkhuis, H.K., Clemens, S., Cronin, T., Dickens, G.R., Eynaud, F., Gattacceca, J., Jakobsson, M., Jordan, R.W., Kaminski, M., King, J., Koç, N., Martinez, N.C., Matthiessen, J., McInroy, D., Moore, T.C., Moran, K., O'Regan, M., Onodera, J., Pälike, H., Rea, B.R., Rio, D., Sakamoto, T., Smith, D.C., St. John, K.E.K., Stein, R., Suto, I., Suzuki, N., Takahashi, K., Watanabe, M., Yamamoto, M.   +30 more
core   +1 more source