An Alternative Formulation for Modeling Self-Excited Vibrations of Drillstring With Polycrystalline Diamond Compact Bits

Keyphrases

• 2DOF 33%
• Alternative Formulations 100%
• Bit Design 33%
• Bottomhole 33%
• Computational Efficiency 33%
• Coupled Axial-torsional Vibrations 33%
• Coupled Ordinary Differential Equations 33%
• Cutters Layout 33%
• Drill String 100%
• Equations of Motion 33%
• Galerkin Method 33%
• Hole Surface 33%
• Linear Stability Analysis 33%
• Nonlinear Coupled System 33%
• Nonlinear State 33%
• Number of States 33%
• Ordinary Differential Equations 66%
• Original System 33%
• Partial Differential Equation Systems 33%
• Partial Differential Equations 66%
• Polycrystalline Diamond Compact Bit 100%
• Realistic Representation 33%
• Regeneration 33%
• Regenerative Effect 33%
• Self-excited Vibration 100%
• Solution Strategies 33%
• Stability Boundary 33%
• State System 33%
• State-dependent Delay 66%
• State-dependent Delay Differential Equations 66%
• Time-domain Simulation 33%

Engineering

• Computational Efficiency 33%
• Coupled System 33%
• Differential Delay 66%
• Excited Vibration 100%
• Hole Bottom 33%
• Linear Stability Analysis 33%
• Partial Differential Equation 100%
• Polycrystalline Diamond 100%
• Stability Boundary 33%
• Surface Hole 33%
• Time Domain 33%
• Torsional Vibration 33%