Results 11 to 20 of about 3,333 (268)
Stick–slip vibrations in oil well drillstring: A review [PDF]
A survey of the literature related to theoretical and experimental studies on stick–slip vibration in oilwell drillstring is carried out in this study. It aims to explain key concepts and present the existing methods for studying this phenomenon.
Liping Tang +4 more
doaj +2 more sources
On the formation of limit cycle of the friction-induced stick-slip vibration in oilwell drillstring
In this paper, the stick-slip vibration in oilwell drillstring is studied. The drilling system is modelled as a lumped-parameter torsional pendulum and the interaction between the drill bit and the rock is treated as Coulomb friction.
Xiaohua Zhu, Liping Tang
doaj +2 more sources
Investigation of Stick-Slip Vibration in a Commercial Vehicle Brake Assembly
There are several types of disc brake instabilities associated with the brake systems; however, they are usually classified into two main categories depending on the frequency range: brake groan 0-300 Hz and brake squeal 1- 16 kHz. The groan is associated with the stick-slip motion while the squeal is associated with the modal coupling.
Ashraf, N. +2 more
openaire +3 more sources
In drilling field, drill-strings stick-slip vibration is a common phenomenon and may lead to a series of drilling accidents. In order to improve drilling efficiency, this paper commits to study a new control system to suppress the undesired stick-slip ...
doaj +3 more sources
Fractional-order controllers for stick-slip vibration mitigation in oil well drill-strings [PDF]
Drillstring–borehole interaction can produce severely damaging vibrations. An example is stick–slip vibration, which negatively affects drilling performance, tool integrity and completion time, and costs.
Massinissa Derbal +4 more
doaj +2 more sources
Stick⁃slip vibration is one of the main vibration forms in the process of horizontal well drilling, and usually leads to adverse consequences such as reduction of bit cutting efficiency and failure of drilling tools.
Li Wenzhe +5 more
doaj +2 more sources
Exploration of oil or gas wells is usually carried out by using drilling system. When the kilometers of drilling system is externally disturbed, the drilling system is prone to undesired stick-slip vibration of the drill-string.
doaj +2 more sources
The inhibition mechanism of ultrasonic vibration on stick-slip phenomenon of sliding friction pair [PDF]
Frictional vibration often occurs during sliding, commonly referred to as the stick-slip phenomenon. It is more likely to occur in the range of the Stribeck curve, where friction and velocity have negative gradient characteristics.
Lingjie Luo +6 more
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Friction-induced vibration and stick-slip waves
This paper presents a short review and new results about the self-excited responses under the form of stick-slip regimes. First, the Van-der Pol oscillator with one degree of freedom is considered. Then it is shown that it is possible to build semi-analytical and numerical (by the FEM.) solutions of stick-slip-separation waves for a brake-like system ...
Abdelbacet Oueslati +1 more
openaire +3 more sources
Experimental investigation into friction reduction induced by normal vibration from frequency dependence to unified vibration velocity amplitude [PDF]
Vibration is recognized as an effective method for reducing friction. However, the underlying mechanisms governing friction reduction at different frequencies remains to be investigated.
Jiandong Lu +3 more
doaj +2 more sources

