Results 171 to 180 of about 568,250 (204)

Drill String Vibration Mitigation During Simultaneous Drilling and Hole Enlargement

SPE/IADC Drilling Conference and Exhibition, 2009
Abstract Drill string vibrations (torsional, axial, and lateral uncontrolled movements) can create issues with equipment, drilling performance and wellbore quality. With respect to equipment, prolonged excessive drill string vibration exposure can lead to fatigue failure such as drill string ‘twist off’, downhole tool breakage, shorter ...
Stefano Mancini, Graham Hitchcock, Jørn Opsahl, Luk Servaes   +3 more
openaire   +1 more source

The Effects of Drilling Mud and Weight Bit on Stability and Vibration of a Drill String

Journal of Vibration and Acoustics, 2011
The main goal of this research is to analyze the effects of drilling mud flow rate, drill string weight, weight on bit and angular velocity on stability and vibration of a drill string. To this end, kinetic and potential energies of a rotating drill string are written while axial and lateral vibrations are considered.
Ali Asghar Jafari, Reza Kazemi, Mohammad Faraji Mahyari   +2 more
openaire   +1 more source

System and method for damping vibration in a drill string

The Journal of the Acoustical Society of America, 2008
A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define a first and a second chamber for holding the fluid.
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, 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

On the formation of the drill string resonance vibrations

Construction of Oil and Gas Wells on Land and Sea, 2022
V.K. Khegai, K.V. Khegai
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

Torsional Vibration of Drill String Induced by Heave Motion in Deepwater Drilling

Journal of Offshore Mechanics and Arctic Engineering
Abstract Understanding drill string dynamics is essential to improving drilling efficiency and preventing accidents. Previous studies have mainly focused on self-excited oscillations due to stick–slip and bit-bounce. However, in deepwater drilling, large weight-on-bit (WOB) fluctuations due to heave motion are a significant concern that ...
Tatsuya Kaneko, Tomoya Inoue, Ryota Wada, Tokihiro Katsui, Hiroyoshi Suzuki   +4 more
openaire   +1 more source

Drill String Vibration Monitoring as an Element of Automatic Control of Drilling

Proceedings of the 5th Workshop for Young Scientists in Computer Science and Software Engineering, 2022
Vladimir Morkun, Natalia Morkun, Vitalii Tron, Alona Haponenko, Iryna Haponenko, Evhen Bobrov   +5 more
openaire   +1 more source

Bending vibration of rotating drill strings

1989
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1989. ; Includes bibliographical references (leaves 129-134). ; by Rong-Juin Shyu. ; Ph.D.
openaire   +1 more source

Active control of a drill string vibration load

Automation, Telemechanization and Communication in Oil Industry, 2021
V.V. Bogachev, K.A. Bashmur, E.A. Petrovsky   +2 more
openaire   +1 more source