Results 31 to 40 of about 568,250 (204)

Analysis on Drill String Vibration Signal of Stick Slip and Bit Bouncing [PDF]

, 2014
In drilling engineering, drill string premature damage are frequently observed, resulting in drilling cost and cycle prolonged. Researches show that, the common phenomenon of drill string vibration is the main cause of premature damage, thus more and ...
Huaigang, FU, Weiqing, QIU, Peili, LI
core   +1 more source

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

Study on Drill String Stick-slip Vibration Pattern Under Bit-Rock Interaction

Shiyou jixie, 2023
Stick-slip vibration leads to high-frequency shear stress on drill string and premature fatigue of drill string.Therefor,the torsional vibration model of drill string system considering bit-rock interaction was built by coupling the bit-rock interaction ...
Xing Xuesong, Pang Zhaoyu, Wu Zhiqiang, Gan Lunke, Mao Liangjie   +4 more
doaj  

Research on BHA Load Transfer Considering Drill String Transverse Vibration [PDF]

, 2013
With increasing difficulty of reservoir development and harsh geological conditions, higher drilling technology meets lots of challenges, especially in the large displacement wells and ultra-deep wells.
Peng, WANG, Tie, YAN, Qian, Zhang
core   +1 more source

Research on a Model of Nonlinear Coupled-vibration of Directional Well Drill String [PDF]

, 2015
Drill string vibrations are inevitable movement patterns during drilling process, the drill string vibrations form including longitudinal, lateral and torsional are recognized by most scholars.
YAN, Tie, YU, Xiaowen, WANG, Yufen, ZHANG, Nan, LIU, Shanshan, BI, Xueliang   +5 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  

The Review and Development of Devices with an Increasing Rate of Penetration (ROP) in Deep Formation Drilling Based on Drill String Vibration

Energies, 2022
The oil and gas resources stored in deep strata are an important replacement field of the petroleum industry. Accelerating the exploration and development of deep oil and gas is of great significance to the security of energy strategy.
Yongwang Liu, Yixiang Niu, Zhichuan Guan, Shuquan Lyu   +3 more
doaj   +1 more source

Analysis of Drill String Whirling Characteristics Based on Near-Bit Measurement Data

Shiyou jixie
The displacement signal of drill string vibration is difficult to be obtained in the actual drilling process. To further understand the vibration characteristics of drill string when whirling motion occurs in wellbore during drilling process， first， the ...
Zhang Tao, Yang Zhenpeng, Li Jun, Wang Miaorui, Wang Mengfan, Guo Zixian   +5 more
doaj   +3 more sources

Suppression of Stick-Slip Vibration of Drill String by Fractional-Order PID Control

Shiyou jixie, 2020
Stick-slip vibration of drill string is one of the important reasons leading to accelerated wear and premature damage of drilling equipment, reduced drilling safety and reduced drilling efficiency.
Zhang Qizhi, Xu Shuai
doaj  

Mitochondria and Neuromast Tagging With Fluorescent Gallium‐Triapine Analogues: In Cellulo MP FLIM and Zebrafish Live Imaging

Advanced Science, EarlyView.
Fluorescent BODIPY‐conjugated thiosemicarbazone ligands and their Ga(III), In(III), and Fe(III) complexes, inspired by Triapine, are developed as theranostic agents. Multiphoton FLIM and confocal microscopy in cancer cells and zebrafish reveal real‐time uptake, mitochondrial localisation, and whilst spectroscopic assays indicated preserved complex ...
Megan J. Green, Michael W. Jones, Merissa Saleem, Haobo Ge, Melita Tvardauskaite, Julia Dudzic, Fernando Cortezon‐Tamarit, Rory L. Arrowsmith, Charareh Pourzand, Gabriele Kociock‐Kohn, Nicholas H. Rees, Jonathan R. Dilworth, Stephen Faulkner, Stanley W. Botchway, David Gurevich, Sofia I. Pascu   +15 more
wiley   +1 more source