Results 101 to 110 of about 801 (206)

Research on Stick-slip Vibration Level Estimation of Drillstring Based on SVM

Shiyou jixie, 2019
To evaluate the severity of stick-slip vibration of drill string, a risk assessment method based on factor analysis (FA) and support vector machine (SVM) is proposed.
Chen Chong, Zhang Shimin, Peng He, Cui Can, Liu Yang   +4 more
doaj  

Nonlinear vibration analysis of directional drill string considering effect of drilling mud and weight on bit [PDF]

, 2016
In this paper a nonlinear dynamic model for drill string in inclined well drilling is developed. Effects of drilling mud flow rate, weight on bit, angular velocity along with viscous damping on stability and vibration of the drill string are studied ...
Farshad Taheran, Esmaeil Abedi, Saeed Daneshmand, Vahid Monfared   +3 more
core  

Dynamic Model and Stick-slip Reduction Characteristics of a New Torsional Vibration Tool

工程科学与技术, 2020
In the process of oil and gas exploitation, with the increase of drilling depth, the rock hardness is increased, and the downhole friction resistance is larger, the drill string system is prone to stick-slip vibration, which may lead to premature ...
Jialin TIAN, Hongzhi HE, Lin YANG, Yinglin YANG, Qianjin CHENG, Genyin LI, Shuhui HU   +6 more
doaj  

A review of vertical drill-string mathematical modelling

Applications in Engineering Science
This work aims to elucidate the fundamental concepts and approaches for modelling the vertical rotary drilling system and analysing drill string vibrations through a comprehensive literature review.
Jasem M. Kamel, Asan G.A. Muthalif, Abdulazim H. Falah   +2 more
doaj   +1 more source

Poster Sessions

HemaSphere, Volume 10, Issue S1, June 2026.
wiley   +1 more source

An Analytical–Numerical Model for Determining “Drill String–Wellbore” Frictional Interaction Forces

Energies
Currently, drilling of directional oil and gas wells under complex technical-technological and mining-geological conditions requires the use of drill pipes made of various materials.
Michał Bembenek, Yaroslav Grydzhuk, Bożena Gajdzik, Liubomyr Ropyak, Mykhaylo Pashechko, Orest Slabyi, Ahmed Al-Tanakchi, Tetiana Pryhorovska   +7 more
doaj   +1 more source

Publication Only

HemaSphere, Volume 10, Issue S1, June 2026.
wiley   +1 more source

Downhole vibration causing a drill collar failure and solutions

, 2017
In large borehole drilling of some blocks or formations, due to serious downhole vibration, fatigue failure of a drill collar occurs frequently and most washouts and fractures are in thread root.
Zongming Zou, Jiaxiang Xia, Bing Huang, Linhu Ma, Quanta Zhu   +4 more
core   +1 more source

Analysis of drilling vibration characteristics of anchoring system in coal mine. [PDF]

Sci Rep, 2023
Xie M, Li Y, Zhang H, Yang Z, Ren Z, Nie R.   +5 more
europepmc   +1 more source

ON DRILL-STRING NATURAL TORSIONAL VIBRATIONS

Oil and Gas Business, 2014
A.G. Khakimov, E.I. Satyev
openaire   +2 more sources