1. ENGI 8926: Mechanical Design Project II
Downhole Turbine for Drilling
Research and Conceptual Design
Supervisor: Dr. J. Yang
G5Downhole:
Bret Kenny
Lida Liu
Piek Suan Saw
Chintan Sharma
February 6, 2014
Bret

2. Agenda Drilling 101 Project Overview Design Constraints
Solution Alternatives
Concept Selection
Conclusion
Forward Plan
Bret

3. Drilling Overview
Drill Pipe
Mud Motor
Downhole Tools
Bit
Bret

4. Mud Motors vs. Turbines Rotor Stator Criteria Mud Motor Turbine
High RPM  
High Torque
Tripping Downtime
Market Availability
Sold individually
Sold with services
Bret
*We are designing a downhole turbine assy because they allow the passage of fluid in the event of a stall and

5. Project Overview Client: Advanced Drilling Group
Purpose: Design a downhole turbine-operated assembly to power a variety of downhole drilling tools
Scope:
Turbine Selection
Component Design
Modular Design
Safety/Compliance Tools
Desired Outcome: Final design will incorporate the selection and optimization of existing components
Lida

6. Design Constraints Constraints Description Size Diameter = 6.0”
Length = 6.0’
Output
RPM
Input
Flow rate: gal/min
∆P < 500psi
Strength
Tool strength designed to API drill pipe specs
Operational Conditions
Water-based drilling mud
Modular Design
Couple multiple turbine assemblies
Market Availability
Existing applications
Cost
Minimize
Health, Safety & Environment
Pressure build-up mitigation device, compliance tool
Lida

7. Research & Conceptual Design
Preliminary Design
Design Optimization
Phase 1 - Objectives
Reviewed
- Existing Applications
- Scientific Literature
- Patents
Contacted
- Industry Professionals
- Potential Suppliers
- Faculty Members
Concept Selection
Lida
Mention reversed pumps and turbines

8. Alternative 1: Pumps Centrifugal Pumps Turbine Pumps Axial Flow Pumps
Enclosed impellers are not optimum
Low Efficiencies (~5%)
Unsuitable Blade design
High P or Q needed
Propellers can be
reversed to generate
power
Chintan

9. Alternative 2: Turbines
Impulse
Reaction
Operating Principal
Momentum change of high-velocity jet on turbine runner
Momentum change and lift development on turbine blades
Examples
Pelton wheel
Turgo
Francis
Kaplan
Compressor
Chintan
Pelton Wheel
Kaplan Turbine

10. Concept Selection Criteria Weight(%) Size Compatibility 30
Modular Flexibility 20
Flow Direction Compatibility 15
Efficiency per stage 10
Industrial Application
Operational Conditions 5
Maintenance & Reliability
Fluid Rheology
Chintan

11. Reversed Centrifugal Pump
Conclusion
Concept
Score
Kaplan
4.3
Reversed Axial Pump
3.9
Reversed Centrifugal Pump
3.1
Compressor
2.9
Turgo Turbine
2.7
Francis
1.7
Pelton
1.6
Chintan

12. SolidWorks Model
Chintan

13. Current Project Status
Project Phase
Objectives
Status
Finish Date
Phase 1
Background Research
Completed
Concept Scoring
Concept Selection
SolidWorks Model - Draft 1
Phase 2
Component Selection
End of Week 6
Component Design
End of Week 7
System Analysis
End of Week 8
SolidWorks Model - Draft 2
Phase 3
System Optimization
End of Week 11
SolidWorks Model - Final
San
Completed In-progress To be completed

14. Forward Plans Phase 2: Preliminary Design
Load Estimation (axial, torsional and lateral)
Bearing selection
Drive Shaft Design
Additional Component Selection
Transmission
Pressure Relief Valve
Seals
Generate turbine performance curves
Development of rpm and torque vs. length relationship
Flow testing
San

15. Thank You! Questions? http://g5downhole.weebly.com
San