The course includes discussion of steel – the material and its mechanical properties, including the impact of stress, strain
and deformation, that will lay the groundwork for an understanding of the limitations of published tubular ratings.
Participants will learn about API and ISO rating and tubular strength formulæ. Specific API and ISO topics covered will
include API yield stress, Barlow Equation for tubular internal yield, casing thread leak resistance, collapse formulæ, and
tension.
In addition to tubular connections and sour service conditions. Specific topics discussed will include API thread forms,
tubular markings and make-up considerations. Proprietary thread types will also be discussed, and the participants will
get an opportunity to learn about the advantages and benefits of different thread form styles. Hydrogen sulphide stress
cracking mechanisms will be explored, along with corrosion and its effect on tubulars. Guidelines for selection of
appropriate materials for casing under different corrosive conditions will be explained.
The graphical casing setting depth calculations (using a spreadsheet), along with the formulæ for calculating triaxial
stresses of various load states to which casing may be exposed. Design (safety) factors will be discussed along with a
comparison between uni-axial and triaxial stress. Tubular buckling will be discussed, which will help the participants learn
about the effects of temperature change on tubulars. Casing wear mechanisms will also be discussed and some
suggestions for the management and design for wear effects will be presented.
Understanding service life models and load cases, such as axial, burst and collapse will be explained and load estimates
for different situations will be evaluated. Base case determination from which load changes are evaluated will also be
covered. Participants will learn about the planning, specifications, and quality assurance of the procurement process.
The day will conclude with a discussion of inspection types, tubular marking, and suggestions on running practices.