API 7G : 1998

Table of Contents

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

Abstract

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.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	American Petroleum Institute
ProductNote	Reconfirmed 1998
Pages
ISBN