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9. Drillstring & BHA Design 
Habiburrohman abdullah 1
Drill String Design 
• Drill Pipe 
• Pressure Control Equipment 
• Drill String Loads 
• Monitoring Equipment 
2
Bottom-Hole Assembly (BHA) 
Design 
• Purpose 
• Components 
• Assemblies: 
- Slick, Packed, Pendulum, Directional 
• Prop...
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