Tubing Analysis System (TAS)
What is A Tubing Analysis System?
TAS is a computer program designed to perform various calculations and simulations often needed in tubular applications. TAS is used as a Coiled Tubing Job Simulator, designing velocity strings, drill pipe applications, under balanced drilling, coiled tubing drilling, cementing, and wireline simulations. TAS is an integrated modular program incorporating Force and Stress Analysis, Fluid Circulation, and Unload Kill Fluids, in addition to numerous quick computations often needed in tubular computations. The system runs on any Windows 95 or above operating system. The first release of TAS was in November 1992. TAS has since been evolving into a market leader in tubular simulations.
Features
Force and Stress Analysis
- Hoop
- Radial
- Axial Stress
Single-Phase Module
- Newtonian
- Power-Law
- Bingham Plastic
Multi-Phase Module
- Duns and Ros
- Beggs and Brill
- Hagedorn and Brown
Force and Stress Analysis Module
The computations in this module include the effects of weight, friction, buoyancy, wellhead pressure, pressure drop through downhole tools, dogleg severity, and extra friction (in buckling modes, i.e. sinusoidal and helical). Three stress components are computed, hoop, radial and axial stress (includes bending stress due to doglegs and when in buckling mode). Von Mises relationship is used to compute Tri-Axial Stress. The module will automatically detect critical conditions such as lockup and severe dog-legs. Furthermore, several options are available for simulating different scenarios such as applying weight-on-bit, bottom-hole pull, changing well conditions to account for fluid circulation effects, predicting maximum pull, and predicting maximum push to lockup.
Fluid Circulation Module
This is made up of two models, one for single-phase flows and the other for multi-phase.
Single-Phase Model
- Any one of three models may be used to describe the rheological behaviour of liquids as Newtonian, Power-Law or Bingham Plastic.
- The single-phase fluids can be compressible as in the case of gas.
- Foam is treated as a single-phase Bingham Plastic fluid where the rheological properties are a function of the foam quality and the shear rate. Foam is a compressible fluid.
Multi-Phase Model
Computations are based on the Duns and Ros, Beggs and Brill, or Hagedorn and Brown algorithms. The user has a choice of selecting the preferred method of computation.
- Velocity string designs
- Sand/cuttings cleanout
- Gas lift mandrels
- Sensitivity analysis
Multi-Phase Model
Computations are based on the Duns and Ros, Beggs and Brill, or Hagedorn and Brown algorithms. The user has a choice of selecting the preferred method of computation.
- Velocity string designs
- Sand/cuttings cleanout
- Gas lift mandrels
- Sensitivity analysis
Unloading Kill Fluids
This simulator is for designing and optimizing unloading kill fluids using N2 through the coiled tubing. The module performs a series of scenarios and reports a table of predicted liquid lift rates versus N2 flow rates at various depths. Total N2 and time required are also reported.