Results 231 to 240 of about 69,267 (280)

Glomar Challenger Drillings: The Magnetic Field Produced by the Drill and Drill String

, 1979
openaire   +1 more source

Some of the next articles are maybe not open access.

Related searches:

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

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

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 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

Performance of Drill String Hardfacings

Journal of Energy Resources Technology, 1984
Drill string hardfacings are composites of steel and tungsten carbide applied by welding techniques. This paper discusses the important variables involved and gives experimental results for casing wear and abrasive wear resistance.
J. S. Williamson, J. Bolton
openaire   +1 more source

Experimental Evaluations of Drill Bit and Drill String Dynamics

Proceedings of SPE Annual Technical Conference and Exhibition, 1994
Abstract Laboratory and field experiments were performed to investigate the dynamics of the drill bit and drill string. Laboratory results for Anti-whirl and conventional polycrystalline diamond compact (PDC) bits showed that vibrations of the former were an order of magnitude less than those of the latter.
M.W. Dykstra, D.C.-K. Chen, T.M. Warren
openaire   +2 more sources

Designing and Qualifying Drill Strings for Extended Reach Drilling

SPE Drilling & Completion, 1996
Summary Extended reach (ER) drill string design involves selecting from a variety of available drill string components, those best suited to drill an ER well. In a typical ER well, torsion loads will be higher and tension loads will be lower than for a vertical well of the same measured depth.
T.H. Hill, G.J. Guild, M.A. Summers
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