Results 251 to 260 of about 643,401 (321)

Nonlinear vibrations of composite drill strings considering drill string–wellbore contact and bit–rock interaction

Archive of Applied Mechanics, 2022
Maziar Mohammadzadeh, Mohammadreza Arbabtafti, Majid Shahgholi, Jianming Yang   +3 more
openaire   +2 more sources

Electric drill-string telemetry

Journal of Computational Physics, 2003
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Carcione, José M., Poletto, Flavio
openaire   +1 more source

Study On Directional Drilling Coupling Dynamics Based On Drill String Rotary Controller

Journal of Computational and Nonlinear Dynamics, 2023
In the process of long horizontal directional well drilling, the contact between drill string and borehole wall leads to serious dragging pressure. Therefore, a Drill String Rotary Controller(DSC) for directional well is proposed, and the function test
Jialin Tian, Lanhui Mao, Yinglin Yang, Haolin Song, Jun Song   +4 more
semanticscholar   +1 more source

Experimental Verification of Vibration Mitigation Through a Viscous Damping System Along the Drill String

Day 1 Tue, March 07, 2023, 2023
Achieving optimal performance during drilling of complex well trajectories is often hindered by downhole drill-string vibrations and stick-slip. These can lead to drill bit and downhole tool damage, drill-string wear possibly leading to a twist-off, or
Andrew Holsaeter, A. Ambrus, E. Cayeux, Rodica Mihai, S. Moi   +4 more
semanticscholar   +1 more source

Drill String Management to Reduce Drilling Risks

IADC/SPE Drilling Conference, 1998
Abstract Increases in recent and projected rig activity are putting tremendous strains on current inventories of drilling tools and on the industry supply chain attempting to bolster those inventories. Additionally, while much of the new activity is centered in established oil provinces and using established ...
M.A. Summers, S.R. Crabtree
openaire   +1 more source

Drilling String Corrosion - A Major Drilling Problem

Journal of Canadian Petroleum Technology, 1967
Abstract The sources of drilling string corrosion are discussed, together with an economic estimate of the magnitude of this problem in our drilling industry. Problems associated with measuring the corrosion rate in drilling fluids under field conditions are reviewed.
A.S. Murray, W.E. Holman
openaire   +1 more source

A Method for Applying the Use of a Smart 4 Controller for the Assessment of Drill String Bottom-Part Vibrations and Shock Loads

Vibration
Optimization of drilling processes for oil and gas and geothermal wells requires the effective use of mechanical energy for the destruction of rocks.
Serhii Landar, A. Velychkovych, L. Ropyak, Andriy Andrusyak   +3 more
semanticscholar   +1 more source

Nonlinear Stochastic Drill-String Vibrations

Journal of Vibration and Acoustics, 2002
Lateral vibrations of drill-strings used in oil well operations are considered. A finite elements based discretization procedure leads to a nonlinear dynamic system which is used to represent the drill-string inertia and stiffness characteristics, as well as the elasticity of the wall of the well.
P. D. Spanos, A. M. Chevallier, N. P. Politis   +2 more
openaire   +1 more source

Continuous Circulation Drill String Sub

IADC/SPE Drilling Conference and Exhibition, 2012
Abstract There is an increasing need to drill difficult reservoirs in a cost effective way. Over the past few years Managed Pressure Drilling (MPD) has made it possible to drill reservoirs which have a narrow window between pore and fracture pressure gradients.
J. Weir, R. Goodwin, R. Macmillan
openaire   +1 more source

Modeling and Control of Drill-String System With Stick-Slip Vibrations Using LPV Technique

IEEE Transactions on Control Systems Technology, 2021
In this article, a systematic linear parameter-varying (LPV) model and a gain-scheduled control methodology for drill-string systems are proposed to analyze drill-string dynamics and suppress stick-slip vibrations, finally achieving efficient drilling ...
Jun Cheng, Min Wu, Fen Wu, Chengda Lu, Xin Chen, Weihua Cao   +5 more
semanticscholar   +1 more source