Dynamic Failure Analysis and Lifetime Estimation of Tool-string in Rotary Drilling System under Torsional-Axial Coupled Vibrations

2022 ◽  
pp. 106037
Author(s):  
Idir Kessai ◽  
Samir Benammar ◽  
M.Z. Doghmane
Keyword(s):  
Failure Analysis ◽  
Dynamic Failure ◽  
Lifetime Estimation ◽  
Rotary Drilling ◽  
Coupled Vibrations ◽  
Drilling System

Test Circuit Conditioning for Soft Defect Localization

2014 ◽  
Author(s):  
Kristopher D. Staller ◽  
Corey Goodrich
Keyword(s):  
Laser Beam ◽  
Failure Analysis ◽  
Signal Frequency ◽  
Dynamic Failure ◽  
The Third ◽  
Analysis Technique ◽  
Test Circuit ◽  
Defect Localization ◽  
Manual Input ◽  
Fast Dynamic

Abstract Soft Defect Localization (SDL) is a dynamic laser-based failure analysis technique that can detect circuit upsets (or cause a malfunctioning circuit to recover) by generation of localized heat or photons from a rastered laser beam. SDL is the third and seldom used method on the LSM tool. Most failure analysis LSM sessions use the endo-thermic mode (TIVA, XIVA, OBIRCH), followed by the photo-injection mode (LIVA) to isolate most of their failures. SDL is seldom used or attempted, unless there is a unique and obvious failure mode that can benefit from the application. Many failure analysts, with a creative approach to the analysis, can employ SDL. They will benefit by rapidly finding the location of the failure mechanism and forgoing weeks of nodal probing and isolation. This paper will cover circuit signal conditioning to allow for fast dynamic failure isolation using an LSM for laser stimulation. Discussions of several cases will demonstrate how the laser can be employed for triggering across a pass/fail boundary as defined by voltage levels, supply currents, signal frequency, or digital flags. A technique for manual input of the LSM trigger is also discussed.

Dynamic Failure Analysis of Earthmoving Equipment

1969 ◽  
Author(s):  
Jack W. Martz ◽  
James E. Sherlock ◽  
Jason R. Lemon
Keyword(s):  
Failure Analysis ◽  
Dynamic Failure ◽  
Earthmoving Equipment

scholarly journals A nonsmooth approach for the modelling of a mechanical rotary drilling system with friction

2020 ◽  
Vol 9 (4) ◽  
pp. 915-934
Author(s):  
Samir Adly ◽  
◽  
Daniel Goeleven ◽  
Keyword(s):  
Rotary Drilling ◽  
Drilling System

scholarly journals Full-scale experimental investigation of the performance of a jet-assisted rotary drilling system in crystalline rock

2019 ◽  
Vol 115 ◽  
pp. 87-98 ◽  
Author(s):  
Thomas Stoxreiter ◽  
Gary Portwood ◽  
Laurent Gerbaud ◽  
Olivier Seibel ◽  
Stefan Essl ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Crystalline Rock ◽  
Full Scale ◽  
Rotary Drilling ◽  
Drilling System

scholarly journals SPH modeling of fluid–solid interaction for dynamic failure analysis of fluid-filled thin shells

2013 ◽  
Vol 39 ◽  
pp. 126-153 ◽  
Author(s):  
F. Caleyron ◽  
A. Combescure ◽  
V. Faucher ◽  
S. Potapov
Keyword(s):  
Failure Analysis ◽  
Thin Shells ◽  
Dynamic Failure ◽  
Fluid Solid Interaction

Trajectory Tracking Control for Rotary Drilling Systems Via Integral Sliding Mode Control Approach

2020 ◽  
Vol 1 (3) ◽  
Author(s):  
Chien-Chih Weng ◽  
Mansour Karkoub ◽  
Wen-Shyong Yu ◽  
Ming-Guo Her ◽  
Hsuan-Yi Chen
Keyword(s):  
Sliding Mode Control ◽  
Trajectory Tracking ◽  
Sliding Mode ◽  
Drill String ◽  
Rotary Table ◽  
Rotary Drilling ◽  
Integral Sliding Mode Control ◽  
Integral Sliding Mode ◽  
Mode Control ◽  
Drilling System

Abstract Active and passive control techniques have been devised over the years to mitigate the effect of vibrations on drill-string life with varying degrees of success. Here, it is proposed to design a robust trajectory tracking controller, which ultimately forces the rotary table and the drill-bit to move with the same speed (speed synchronization), hence reducing/eliminating torsional vibrations from the drill pipes. A model of the rotary drilling system, which includes torsional stick-slip, is first developed; then, an integral sliding mode control with time-varying exponent (ISMC-TVE) scheme is developed such that the bit motion tracks that of the rotary table to mitigate the effects of the induced vibrations. The ISMC-TVE is able to control the transient stage of the drill-string system’s response, maintain the system in the sliding state even under abrupt or existing external disturbances, and guarantee asymptotic stability of the rotary drilling system. The Lyapunov stability theorem is used here to analyze the performance of the closed-loop system, and the simulation results showed that the ISMC-TVE law is capable of accurately synchronizing the bit and rotary table speeds.

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