Advanced Casing Design
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Advanced Casing Design Course
Introduction:
The course places a strong emphasis on the practical application of casing design principles and theory, starting from a foundational level and progressing to advanced concepts. It can be tailored to cater to either level of expertise. The course covers various aspects, including casing design terminology, manufacturing processes, materials and their properties, as well as the theory behind burst, collapse, and axial loadings. It also explores design policies, procedures, and API specifications, along with an examination of the underlying theory and limitations of these specifications. Special cases such as HP/HT (high-pressure/high-temperature) and sour service are addressed, in addition to discussing connections and non-API principles of tri-axial design that offer improvements over API limitations.
The course also delves into kick tolerance and its impact on casing seat selection, providing a detailed exploration of the subject. Documentation and audit processes are thoroughly covered as well. A significant portion of the course is dedicated to worked examples, starting with basic practical problems and culminating in a comprehensive casing design for a typical well. These examples are approached from first principles, requiring extensive mathematical utilization.
Course Objectives:
A full appreciation of the key API Specifications, their origin and their limitations to modern casing design
- Performance properties – definitions
- Casing manufacturing processes, material selection and properties
- Special requirements including HPHT and sour service
- Stress / strain theory and the application to thick-walled cylinders
- The objectives of casing design and the fundamental design principles
- Casing connections
- Mechanical design and design safety factors - burst, collapse and axial loading and integrated tri-axial stress analysis
- Casing seat selection and the importance of kick tolerance
- Pressure testing
- Documentation and audit of the casing design process
- Commercial principles of casing procurement and their impact on casing design
- Casing design examples and practice
Who Should Attend?
Drilling and completion engineers and service company personnel with a basic knowledge of well design principles through to experienced drilling engineers who desire a more theoretical, detailed knowledge of the subject
Course Outlines:
- Introduction to casing design. Generic policies.
- Casing nomenclature, materials and properties, carbon and non-carbon steels
- API Specifications - their origin and limitations
- Non-API casing grades and specifications
- Engineering definitions - stress, strain, elasticity, yield etc.
- Metallurgy and the manufacturing process
- Inspection and NDT
- Exercises
- Objectives of casing design - casing and well types
- Casing design concepts - stress analysis
- Tri-axial design principles
- Additional design factors - temperature, sour service, fatigue, buckling
- Casing connections - premium versus API
- Exercises
- The design process - offset well data, hole size considerations, testing and completion factors, company policies
- Casing design - external, internal and axial loading
- Special load design considerations
- Casing seat selection - principal criteria and design factors
- Kick tolerance
- Leak-off tests
- Pressure testing
Computer modeling and the application to advanced casing design
- Casing procurement and the impact on the casing design process
- Tenders and contracts
- Specifications
- Inspection
- Casing transportation, storage and running procedures
- Exercises
- Casing design project - designing a complete well casing programme
- Computer Aided Casing Design