Fundamentals of Casing Design:

This 4 day course covers the relevant subjects required to understand the structural mechanics of downhole tubulars. Material aspects, connection selection, performance properties, load cases, design factors, and buckling are just a few of the many topics that are covered.
The course is designed to concentrate on the fundamentals, and on the last day, if required, the tutors will concentrate on how software is used to assist the casing designer.

Day 1 - Introduction & Materials

1. Introduction to Casing and Tubing Design - Instructors and student introductions are made in order to familiarize the instructors with each participant's background. A casing and tubing design overview is provided and the course outline is discussed.
   
   1. Objectives
   2. Method
       
2. Basic Concepts-Purpose of Tubular Strings - In this section the fundamental concepts of casing and tubing design are presented. These elements provide the foundation for the
   remainder of the course.
   
   1. Pipe Types
   2. Loading Modes
   3. Design Factors
   4. Pipe Functions
   5. Design Requirements
       
3. Material Aspects - This section takes an in depth look at the material aspects of design. Basic material science concepts are followed by a detailed look at API 5CT, 5B, and ISO15156.
   1. Pipe Mechanics
   2. Pipe Designation - Size, Weight, Tolerances
   3. Grade
   4. Lengths
   5. Sour Service

Day 2 - Connections & Performance

4. Connections - The components of a connection and connection selection techniques are thoroughly discussed. Upon completion, participants should be able to select an appropriate API or proprietary connection.
   
   1. API
   2. Proprietary
       
5. Performance Properties - Rating calculation methods for each of the five design factors are presented in this section. API 5C3 is discussed in detail.
   
   1. Tension
   2. Compression
   3. Internal Yield Pressure
   4. Collapse
   5. Yield Strength and Threshold Stress

Day 3 - Design Fundamentals

6. Fundamental Design Principles - Load calculation methods for each of the five design factors are presented in this section. A significant amount of the lecture is devoted to the correct method for calculating axial load. Buckling calculations are simple once the participants have mastered the above.
   
   1. Conventional and Service Life Design Methods
      
      1. Burst
      2. Collapse
      3. Tension/Compression
      4. Triaxial w/ Class Exercise
   2. Buoyancy and Buoyancy Factors
   3. Free Body Diagrams w/ Class Exercise
   4. Theory of tubular buckling w/ Class Exercise
       
7. Casing Loading and Design Considerations - Load cases from various operators are presented and the importance of Load Case rationalization is discussed.
   
   1. Tubular Selection
   2. Cost
   3. Service Load Cases

Day 4 - Hand Calculation

8. Hand Calculation: A comprehensive casing design hand calculation summarizes the methods presented in the course.
   
   1. Service Life Design Load(s) Equations
      
      1. Calculation Procedures
      2. Summary of Equations
         
         1. Burst
         2. Collapse
         3. Axial Load (Tension/Compression)
         4. Triaxial Equivalent Stress Intensity
   2. Example String Designs (Hand Calculation, Class Exercise)
      
      1. Production Casing
          
9. Specialist Design Considerations - a discussion of the more specialist aspects of casing design, for those that are interested:
   
   1. Multi-String Mechanics and Wellhead Growth.
   2. Wellhead Lock Device Force Demand
   3. Annulus Pressure Build-Up, APB, theory and discussion.
   4. Torque and Drag considerations for the running of casing, both flooded casing and extended reach (ERD) floated casing, theory and discussion.