Results 241 to 250 of about 4,494 (274)

Analysis of the Influences of Drilling Fluid Flow Velocity inside and outside the Drilling String on Drilling String Lateral Vibration Frequency

Advanced Materials Research, 2013
Drilling string lateral vibration is a severe damage,which is influenced by many complex factors. This paper makes a theoretical analysis of the drilling string lateral vibration frequency caused by drilling fluid flow velocity inside and outside the drilling string, which supplies some evidence for calculating rotation speed of rotary table and ...
Tie Yan, Li Wang, Xiao Feng Sun, Jun Bo Qu   +3 more
openaire   +1 more source

Analysis of the Influences of Drilling Fluid Flow Velocity inside and outside the Drilling String on Drilling String Lateral Vibration Frequency

Advanced Materials Research, 2014
Drilling string lateral vibration is a severe damage,which is influenced by many complex factors. This paper makes a theoretical analysis of the drilling string lateral vibration frequency caused by drilling fluid flow velocity inside and outside the drilling string, which supplies some evidence for calculating rotation speed of rotary table and ...
De Da Hou, Qing Bin Zhang, Yun Hua Cui, Cheng Dong Zhang   +3 more
openaire   +1 more source

Computer modelling of drill string of an oilwell drilling rig

2018 14th International Conference on Advanced Trends in Radioelecrtronics, Telecommunications and Computer Engineering (TCSET), 2018
The article considers the questions of construction and computer realization of the mathematical model of drill string of a drilling rig. An approximation model is proposed in the form of systems of ordinary differential equations. Built on their basis, the computer model of the drill string has several important properties: allows you to reproduce the
Andriy Verlan, Volodymyr Fedorchuk
openaire   +1 more source

A telegrapher equation for electric - telemetering in drill strings

IEEE Transactions on Geoscience and Remote Sensing, 2002
A reliable method of transmitting downhole information to the surface while drilling is essential to improve drilling applications. We have designed a numerical algorithm for simulation of electric-signal transmission through the drill string, based on the telegrapher equation (a circuit model).
José M. Carcione, Flavio Poletto
openaire   +1 more source

Ground Measurement of Noise Characteristics in Drill String During Drilling

SSRN Electronic Journal, 2022
Liu Yongwang, Lin Guojun, Du Binbin, Guan Zhichuan, Zhao Guoshan   +4 more
openaire   +1 more source

Nonlinear dynamic characteristics of the drill-string for deep-water and ultra-deep water drilling

Journal of Petroleum Science and Engineering, 2022
Qinfeng Di, Wenchang Wang, Feng Chen
exaly  

drill string

2014
openaire   +2 more sources

Analysis of the Influence of Downhole Drill String Vibration on Wellbore Stability

Machines, 2023
Qilong Xue
exaly  

Nonlinear dynamics of lump mass model of drill-string in horizontal well

International Journal of Mechanical Sciences, 2020
Dou Xie, Zhiqiang Huang, Lifeng Ma
exaly  

Seal for drill string

Sealing Technology, 2009
openaire   +1 more source