Results 231 to 240 of about 235,356 (289)

Drill-String Dynamics: Reduced-Order Models and Experimental Studies

Journal of Vibration and Acoustics, Transactions of the ASME, 2011
In this article, reduced-order models of a drill-string system are developed, the predictions of these models are studied, and qualitative comparisons are made with experimental studies.
Balakumar Balachandran, Mansour Karkoub, Chien-Min Liao   +2 more
exaly   +2 more sources

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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

Effects of Drill String Length on Stick–Slip Oscillation of the Oilwell Drill String

Iranian Journal of Science and Technology, Transactions of Mechanical Engineering, 2019
It has been demonstrated by numerous field data that the stick–slip phenomenon tends to appear in deep wells. However, the explanation for this phenomenon has scarcely been studied. Based on a torsional pendulum model, the relationship between stick–slip oscillation and drill string (DS) length is studied in this work.
Liping Tang, Xiaohua Zhu
openaire   +1 more source

Drilling String Vibration: Modelling and Simulation

Volume 11A: Honoring Symposium for Professor Carlos Guedes Soares on Marine Technology and Ocean Engineering, 2018
The offshore industry has a significant impact on the global economy and it is expected to grow over the next 4 years. A crucial part of an offshore structure is the drill string. Drill strings can be seriously damaged by vibration during drilling operations. The control of vibrations in drill strings is essential.
Amat, Sergio, Henríquez Velez, Gustavo E, Légaz, María José   +2 more
openaire   +2 more sources

The Study on Vibration of Drill String of ERW

2008 International Conference on Computer Science and Software Engineering, 2008
During exploitation of extended reach well (ERW) drilling engineer, the problem of drill string failure is very serious; drill string vibrations are main reasons. In this paper drill string of extended reach well of different part is object being studied. The models about various vibrations are set up. Modal vibrations of drill string are studied.
Han Chunjie, Yan Tie
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

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

Fatigue of Drill String Connections

Journal of Offshore Mechanics and Arctic Engineering, 1995
Abstract This paper reports full-scale tests on threaded connections used in drill strings. A concise background is given concerning the in-service environment and loading conditions on the connections. This details some of the reasons particular steels are used in preference to others. Crack growth data is given for ten full-scale axial
openaire   +1 more source

Drill String Failures: Inevitable or Not?

IADC/SPE International Drilling Conference and Exhibition
Abstract The past few years have seen many experienced drilling operations personnel retire. Coincidently, the industry saw an increase in the number of drillstring failures, some of which could have potentially been avoided. These failures can result in non-productive time (NPT) like fishing trips, side tracking, or exorbitant repair ...
G. Plessis, D. Morgan, D. Meinders, C. Wade   +3 more
openaire   +1 more source

Longitudinal Vibrations of a Drill String

The Journal of the Acoustical Society of America, 1965
When drilling an oil well with a rotary drill, the penetration rate often can be substantially increased by superimposing a vibratory motion on the rotating bit. In order to evaluate drilling methods that would include both rotary and vibratory action, a study has been made on the vibrational characteristics of long drill string. The resonant frequency
openaire   +1 more source