𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Self-excitation of deep-well drill string torsional vibrations

✍ Scribed by V. I. Gulyaev; S. N. Khudolii; O. V. Glushakova

Publisher
Springer
Year
2009
Tongue
English
Weight
171 KB
Volume
41
Category
Article
ISSN
0039-2316

No coin nor oath required. For personal study only.

πŸ“œ SIMILAR VOLUMES

Active damping of self-excited torsional
Active damping of self-excited torsional vibrations in oil well drillstrings
✍ J.D. Jansen; L. van den Steen πŸ“‚ Article πŸ“… 1995 πŸ› Elsevier Science 🌐 English βš– 726 KB

A drillstring used for the drilling of oil or gas wells behaves as a rotating torsional pendulum. The drillstring is rotated at a constant angular velocity by an electric motor, but exhibits superimposed torsional vibrations caused by a non-linear relationship between torque and angular velocity at

Coupled axial/torsional vibrations of dr
Coupled axial/torsional vibrations of drill-strings by means of non-linear model
✍ R. Sampaio; M.T. Piovan; G. Venero Lozano πŸ“‚ Article πŸ“… 2007 πŸ› Elsevier Science 🌐 English βš– 393 KB

In the present work a geometrically non-linear model is presented to study the coupling of axial and torsional vibrations on a drill-string, which is described as a vertical slender beam under axial rotation. It is known that the geometrical nonlinearities play an important role in the stiffening of

Multiple mode analysis of the self-excit
Multiple mode analysis of the self-excited vibrations of rotary drilling systems
✍ Christophe Germay; Vincent DenoΓ«l; Emmanuel Detournay πŸ“‚ Article πŸ“… 2009 πŸ› Elsevier Science 🌐 English βš– 755 KB

This paper extends the analysis of the self-excitated vibrations of a drilling structure presented in an earlier paper [T. Richard, C. Germay, E. Detournay, A simplified model to explore the root cause of stick-slip vibrations in drilling systems with drag bits, Journal of Sound and Vibration 305 (3