RECOMMENDED PRACTICE FOR DRILL STEM DESIGN AND OPERATING LIMITS
American Petroleum Institute
1 SCOPE
1.1 Coverage
1.2 Section Coverage
2 REFERENCES
3 DEFINITIONS
4 PROPERTIES OF DRILL PIPE AND TOOL JOINTS
5 PROPERTIES OF DRILL COLLARS
6 PROPERTIES OF KELLYS
7 DESIGN CALCULATIONS
7.1 Design Parameters
7.2 Special Design Parameters
7.3 Supplemental Drill Stem Members
7.4 Tension Loading
7.5 Collapse Due to External Fluid Pressure
7.6 Internal Pressure
7.7 Torsional Strength
7.8 Example Calculation of a Typical Drill String Design -
Based on Margin of Overpull
7.9 Drill Pipe Bending Resulting From Tonging Operations
8 LIMITATIONS RELATED TO HOLE DEVIATION
8.1 Fatigue Damage
8.2 Remedial Action to Reduce Fatigue
8.3 Estimation of Cumulative Fatigue Damage
8.4 Identification of Fatigued Joints
8.5 Wear of Tool Joints and Drill Pipe
8.6 Heat Checking of Tool Joints
9 LIMITATIONS RELATED TO FLOATING VESSELS
10 DRILL STEM CORROSION AND SULFIDE STRESS CRACKING
10.1 Corrosion
10.2 Sulfide Stress Cracking
10.3 Drilling Fluids Containing Oil
11 COMPRESSIVE SERVICE LIMITS FOR DRILL PIPE
11.1 Compressive Service Applications
11.2 Drill Pipe Buckling in Straight, Inclined Well Bores
11.3 Critical Buckling Force for Curved Boreholes
11.4 Bending Stresses on Compressively Loaded Drill Pipe in
Curved Boreholes
11.5 Fatigue Limits for API Drill Pipe
11.6 Estimating Cumulative Fatigue Damage
11.7 Bending Stresses on Buckled Drill Pipe
12 SPECIAL SERVICE PROBLEMS
12.1 Severe Downhole Vibration
12.2 Transition from Drill Pipe to Drill Collars
12.3 Pulling on Stuck Pipe
12.4 Jarring
12.5 Torque in Washover Operations
12.6 Allowable Hookload and Torque Combinations
12.7 Biaxial Loading of Drill Pipe
12.8 Formulas and Physical Constants
12.9 Transition from Elastic to Plastic Collapse
12.10 Effect of Tensile Load on Collapse Resistance
12.11 Example Calculation of Biaxial Loading
14 SPECIAL PROCESSES
14.1 Drill Stem Special Processes
14.2 Connection Break-In
15 DYNAMIC LOADING OF DRILL PIPE
16 CLASSIFICATION SIZE AND MAKE-UP TORQUE FOR ROCK BITS
APPENDIX A - STRENGTH AND DESIGN FORMULAS
APPENDIX B - ARTICLES AND TECHNICAL PAPERS
Gives recommendations for the design and selection of drill string members and includes considerations of hole angle control, drilling fluids, weight and rotary speed and other operational procedures.
| Document Type | Standard |
| Status | Current |
| Publisher | American Petroleum Institute |
| ProductNote | Reconfirmed 2010 |
