The tubular design and analysis system (TDAS) offers high-performance casing and tubing design and analysis. Its primary purpose is to determine the stresses, forces, movements, and design factors that occur as a result of the applied load conditions on tubular strings. Based on these calculations the program can propose a minimum-cost string for a given well based on the input constraints (design criteria, hole size, installed condition, and load cases). 

Results of design and analysis are saved as a wellplan (*.tds).  A wellplan can be loaded for further modifications in another session or loaded to serve as a template for another wellplan.

A special feature is the load case, which allows you to associate one external pressure, one internal pressure, and one temperature profile as an event. (Fluid friction profiles, wall loss selection, or a plug can also be defined.)  The load case allows you to explore a specific event, rather than combining a number of factors into a general event.

Load cases are typically generated by the rule set. A rule set that reflects philosophical differences in design based on company policy and/or geographical location. A rule set defines acceptable design factors, an installed condition for each string, design load cases, standard hole sizes, and other factors typically found in a casing design manual. 

New in TDAS 11.0

Major update on OD/Wall tolerances consideration to align with API 5C3 (2018)

Liner Hanger function update

Hold down capacity is added in LH properties

When the hanging load is upward and exceeds hold down capacity, a warning message will be shown

Update LH envelope axis to align with API 19LH

Use hanging load (instead of tubing to packer force) to plot against LH envelope

Add default LH ratings for 5x7, 7x9-5/8, 9-5/8x13-3/8 LHs

Change ‘RCB engaged’ & ‘RCB released’ status from Installed load to LH properties

Incorporate new SLB branding

Bug fixes:

No warning message is shown even though the pressure is different below the plug between inside and outside of the casing

When nominal weight is changed, clear adjusted weight, wall Thickness, grade and connection pipe properties

Remove pseudo axial DF warning when pseudo axial force is not enabled

Collapse rating and load values are different at the string level as compared to the corresponding load case

PseudoAxial design factor is different than Axial design factor even in cases where the pseudo axial force is the same as the axial force

TDAS seems to be picking up temperature derating from the default catalog even if an updated derating with the same name exists in the user catalog

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