Drilling is a critical component in many segments of U.S. industry such as resource recovery (e.g., oil, gas, mining), civil infrastructure systems (e.g., sewers, highway tunnels, subways), environmental remediation, and for scientific purposes. Research undertaken for new and improved drilling systems and processes can have an enormous impact on U.S. productivity. This book provides an examination of the technical and scientific feasibility of substantial advances in drilling and related technologies. Concepts for new mechanical and non-mechanical drilling applications—including advances in knowledge of the tool-rock interaction—are reviewed, research opportunities are identified, and recommendations are made on the scope and direction needed to realize these opportunities for improved methods of drilling.
- Drilling and Excavation Technologies for the Future
- Copyright
- PREFACE
- CONTENTS
- 1 EXECUTIVE SUMMARY
- 2 ADVANCED DRILLING SYSTEMS
- INTRODUCTION
- THE DRILLING SYSTEM
- SMART DRILLING SYSTEMS AND THE SYSTEMS APPROACH
- REFERENCES
- 3 NATIONAL IMPORTANCE OF DRILLING
- INTRODUCTION
- OIL DRILLING
- NATURAL GAS DRILLING
- GEOTHERMAL DRILLING
- ENVIRONMENTAL DRILLING
- SERVICE COMPANIES
- INFRASTRUCTURE, UNDERGROUND EXCAVATION, AND MINING
- DRILLING FOR SCIENTIFIC PURPOSES
- SUMMARY AND RECOMMENDATIONS
- REFERENCES
- 4 DRILLING AND BORING OF ROCK
- INTRODUCTION
- TYPES OF ROCK
- THEORETICAL MODELS FOR THE BEHAVIOR OF ROCKS IN COMPRESSION
- EXPERIMENTAL VERIFICATION OF MODELS
- Two Views of Rock Behavior
- Laboratory Experiments on Clastic Flow and Fracture of Rocks
- Effect of Confining Pressure and Temperature on Strength
- Effect of Pore Fluid
- Effect of Size
- Evolution of Sources of Shear Faulting
- SURFACE-ACTIVE AGENTS IN ROCK FRACTURE
- FRACTURING OF ROCK IN DRILLING
- Phenomenology of Drill-Rock Interaction
- Theoretical "Plasticity" Models for the Faulting of Rocks
- Specific Models for Chip Formation
- Other Applications of Rock Fracture
- PRIORITIES FOR R&D
- REFERENCES
- 5 ROCK EXCAVATION TOOLS
- INTRODUCTION
- STATUS OF THE FIELD
- Novel Drilling Systems
- Combined Novel/Mechanical Systems
- Advanced Downhole Motors
- Advanced Drill Bits
- Advanced TBM Cutters
- High-Pressure Jet Drilling Systems
- Slim-Hole Drilling Tools
- Guided Percussion Drills
- Resonant Sonic Drills
- PRIORITIES FOR R&D
- REFERENCES
- 6 SENSING SYSTEMS
- INTRODUCTION
- STATUS OF THE FIELD
- Bit-Rock Interaction
- Formation Evaluation and Fracture Detection at and Ahead of the Bit
- Stress, Rock Strength, and Pore Pressure
- Drill Pipe-Rock Interaction
- Position and Direction Analysis
- Cuttings and Mud Analysis
- Environmental Logging
- Telemetry
- Data Analysis and Activation Systems
- PRIORITIES FOR R&D
- REFERENCES
- 7 DIRECTIONAL DRILLING AND TUNNELING
- INTRODUCTION
- DIRECTIONAL TUNNELING
- DIRECTIONAL DRILLING OF BOREHOLES
- Reasons for Directional Drilling
- Limitations to Borehole Reach and Turning Radius
- METHODS FOR DIRECTIONAL DRILLING
- Long-Radius Methods
- Medium-Radius Methods
- Short-Radius Methods
- Ultra-Short-Radius Methods
- Methods Using Coiled Tubing
- Directional Drilling in the Near Surface
- PRIORITIES FOR R&D
- 8 BOREHOLE STABILITY
- INTRODUCTION
- PRIORITIES FOR R&D
- REFERENCES
- 9 MATERIALS HANDLING
- INTRODUCTION
- STATUS OF THE FIELD FOR DRILLING WELLS
- STATUS OF THE FIELD FOR MINING AND TUNNELING
- PRIORITIES FOR R&D
- REFERENCES
- 10 CONCLUSIONS
- APPENDIX A STATEMENT OF TASK
- ADVANCED DRILLING TECHNOLOGIES
- APPENDIX B Workshop Attendance
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