StrinGnosis® Release Notes

StrinGnosis® 3.3 - March 2021

New Features

  • Core+: it is now possible to license subsets of features, such as thermal processing, well containment analysis, or completion handling, independent of other features.
  • New calculators on SideKick compute some common pipe formulas.
  • The newest Tenaris connection data are now in the provided connection database.
  • The PVT input window now displays a plot of densities vs pressures at two key temperatures.
  • On the Design Envelope plot, if a reduction in Remaining Body Wall is entered, both the full and derated VME ellipses and API limit polygons are shown together for comparison.
  • The Completion load case now supports importing the internal pressure below a plug from a thermal calculation.

Enhancements and Improvements

  • On the Formation Pressure plot, all profiles are now plotted by default.
  • Shut-In thermal case form now updates bottom hole temperature and pressure values to new starting depth when prior operation selection changes.
  • Allowable APB has been reorganized and enhanced for ease of use.
  • To sort CUE points, the shortcut is now Ctrl-T instead of Ctrl-S.
  • When importing formation data from Excel files with large numbers of rows or columns, was sometimes failing to display data correctly. Now checks for excessive sizes before displaying.
  • KISSC on the API grade R95 has been changed to reflect the updated value of 25 ksi √in.
  • The bubble point pressure plot on the Thermal Pressure chart is now hidden by default, and its visibility state setting persists between sessions.
  • In Circulating, the default circulating fluid is now chosen as the last fluid on the last participating string instead of the first.
  • The circulating thermal model has been tuned and recalibrated in accordance with real-world feedback from the field.
  • There is a new flow rate conversion, liters per minute, for both fluid flow rates and circulating flow rates.
  • A new unit for Moment of Inertia is available under Units > Misc.
  • Copyright notices all updated to 2021.
  • Thermal cases now have a default step size that is proportional to the total well depth. This eliminates some plotting artifacts in results.
StrinGnosis® 3.2 - January 2021

Overview: Key Features in 3.2

  • All standard loads have been extensively overhauled and streamlined.
  • The report generator has been completely overhauled.
  • Allowable APB has been overhauled and improved.
  • New Tool Passage calculator on SideKick.
  • In-use equipment can be edited.
  • Free selection of mixed feature sets in StrinGnosis Online.
  • Automatic sorting of connection and packer envelope points.


APB and Wellhead Movement

A new column on Wellhead Movement results displays the actual calculated point of fixity for each string. It is hidden by default.

The Allowable APB feature has been overhauled and simplified, with data for both the inner and outer strings of the annulus on the same tab. Also, it has a new Settings panel, and all settings apply to all annuli.

Casing Input and Wellbore Description

Packer definition form is now a tab on the casing program and has been overhauled.

In the Grades dropdown on the casing program, the list is now grouped by manufacturer.


A new button on the toolbar allows quick navigation to the packer input tab from anywhere in the program.

Completion Equipment handling has been streamlined and improved.

Fluid handling has been overhauled and simplified.

On the connection envelope and packer envelope entry tables, there is an option to sort the points into a convex polygon.

Fluids, grades, tubular, and completion tools can now be edited even when they are in use on a project.


There is a new calculator on SideKick to compute the maximum tool passage length for a given load.

Notes textboxes now spell check, and the ability to insert a timestamp by pressing F5.

All Notes boxes now wrap text.

All input windows are now resizable.

In the Desktop version, Under Help > About, the user can view the number of days left on the license.

If a file is opened by a user who does not have all features licensed, the unlicensed items will be shown with a padlock icon next to them and will be unavailable for editing or calculation.

It is now possible to float and undock tabs in StrinGnosis Online.

There is a new tooltip on the RKB field describing how it is used.

In StrinGnosis Online it is now possible to select free mixtures of enabled features.

Standard Loads

The default value for overpull or slackoff on tubing is now based on yield strength.

It is now possible to enter overpull friction factors up to 5.

All stress load forms have been overhauled and updated, eliminating the need for a separate window to view the pressure profiles.

It is now possible to change the installation mode of the load directly on the load form.

It is now possible to synchronize a load with the wellbore configuration from inside the load form.

Pressure Test: Fraction of MIYP now uses the Remaining Body Wall value from the Design Basis table rather than from the load form.

The Pressure Test load form now uses the fluid density of the last subsequent liner as the internal fluid density when the “Consider Subsequent Liners” option is enabled.

The Initial Condition load form now shows lead and tail cement depths in the pressure profile.

The Initial Condition load form for tubing strings now displays packer type and configuration.

Redundant and unnecessary plug field has been removed from the Tubing Shut-In load case.

On the Packer Leak load case, there is a new display-only field showing the drop depth.

The kick loads now display a warning message if the kick fractures the open shoe.

On the Kick: Limited Volume load case, there is a new display-only field showing the hole size in use. It assumes the hole size of the hole section at the end of the drill string.

On the Kick: Limited Volume load case, there is a new display-only field showing the calculated annular volume outside the drill string. It considers the volume inside the riser if the well is subsea and the string is not a surface or conductor string.

Stress Results

The Packer Envelope results table now has a column to display force differential across the packer.

Probability of Failure and Failure Rate columns were being left-justified. Also, two decimal places were being displayed for Failure Rate; none are needed.

Two of the default colors for stress results, pink and yellow, were too pale to be viewed easily, especially on projectors, and have been removed.

Thermal Simulator

On production and WCD thermal cases, it is now possible to enter the water rate in terms of water cut.

StrinGnosis® 3.1 - November 2019

Overview: Key Features in 3.1

  • The thermal engine now also calculates transient thermal simulations.
  • July 2018 API specification for collapse yield strength now used by default.
  •  Multiple pore and fracture pressure profiles are now supported.
  • Extensive refinement of Wellhead Movement calculations.
  • Formation pressure, trajectory, grade and tubular inputs, as well as stress load comparisons, have been extensively reworked and enhanced.
  • Import handling is now unified across the program and much more powerful.


Casing Input and Wellbore Description

  • Now issues a warning if string hole size is equal to OD and an error if it is less than OD.
  • The 3D wellbore diagram has been overhauled and enhanced.
  • WCD loads now have their own design factor, separate from the casing or tubing design factors.
  • There is a new column on the Design Basis table to enable Actual Wall Thickness consideration on a given section. If enabled, it uses RBW value in the API Burst and VME calculations; otherwise, those are performed using RBW and wall tolerance.


  • The OBM and WBM tabs in the Fluids table now show the in-use thermal conductivity as calculated.
  • WBM table now report specific heat at STP.
  • It is now possible to filter grades by range of yield strength.
  • The Tubulars table now indicates the given tubular’s density variance from the program default value.
  •  PVT coefficients in the fluid manager are now displayed with 2 decimal places in the exponent instead of 3.


  • Tools > Options has been simplified and moved to File > Preferences.
  •  Import handling is now unified across the program and much more powerful.
  • Stress results window now uses boldface text to indicate calculated loads on strings.
  • Keyboard shortcuts are now available for all menu items, including recently used files.
  • Options window has been overhauled, simplied and optimized for Windows 10.
  • The term “minimum acceptable safety factor” has been changed to design factor” in all usages.
  • Curvature units are now given in deg/100 ft or deg/30 m  instead of deg/ft and deg/m.
  •  If user enters a new database name, it is immediately validated instead of when the user clicks “Save”.
  • “Trajectory – NS EW” has been renamed to “Residual Stress Ratio”.
  • The APB tab has been renamed to “APB & WHM Analysis”.
  • The splitter between re-sizable panes has been enhanced and optimized.
  • Trajectory inclines over 89.99°  are now capped.
  •  Notes text now wraps within the current form size instead of expanding the form.
  • It is now possible to enter negative formation temperatures and a negative temperature for surface injection temperature.

Standard Loads

  • Load descriptions are now clearer on Tubing Shut-In and Production Tubing Lead Loads.
  • Load descriptions now capture hanger pressure and all annular sections on all loads.
  • Preload description text on Initial Condition load form has been expanded for clarity,.
  • Default String-to-String Friction factor in overpull load case is now 0.2. The Help file now includes documentation of the source references for the friction factors.

Stress Results

  • Now uses July 2018 API calculation for collapse yield strength by default.
  • There is a new column in the Forces and Pressures table for Collapse Mode, showing the values Yield, Plastic, Transition, Elastic, or NA, according to API 5C3.
  • There are three new columns in the Forces and Pressures table, for OD, ID, Radial Clearance and Hole Size at depth.

Thermal Simulator

  • The thermal engine now also calculates transient thermal simulations. Thermal cases from existing projects will be imported as Steady State cases with duration of at least 24 months.
  • Better generation of color mixtures in multiple temperature profile plots.
  • Better interaction of settings GOR and Gas Rate.
  • New columns on the Results table report Flowing Pressure Gradient, Friction Pressure Gradient and Hydrostatic Pressure Gradient.
StrinGnosis® 3.0 - December 2018

Overview: Key Features in 3.0

  • New load case: Packer Leak (Abandonment).
  • It is now possible to enter custom values for ovality, eccentricity, and residual stress.
  • The external pressure protocol for burst loads on liners can now optionally follow a non-Blade specification.
  • The geometric collapse adjustment is now optional on custom loads.
  • All stress results have been overhauled and migrated to WPF.
  • The entire SideKick tool has been migrated to WPF, and the schematic is greatly enhanced and much more configurable.
  • The well definition tab has been overhauled and migrated to WPF.
  • The Lithology and Geothermal tabs have been greatly expanded and migrated to WPF.
  • The APB tab has been migrated to WPF.
  • YouTube – Release Notes StrinGnosis® 3.0

New Features in 3.0

Casing Input and Wellbore Description

  • The 3-D wellbore drawing has moved to the Trajectory tab.
  • It is now possible to enter custom values for ovality, eccentricity, and residual stress.
  • On the Lithology and Geothermal temperature charts, there is now a plot of the wellbore path with string shoes.
  • API tubulars are now selected as default when related parameters change.
  • It is now possible to enter multiple geothermal temperature profiles.
  • Geothermal temperature can now be imported in gradients as well as temperature.
  • On the schematic, it is no possible to set the annular label text size independently of the size of the other text on the diagram.
  • The string number on the casing program tables now only appears on the first section of each string, to more easily identify separate strings.


  • Stress calculator now considers weight and dimensions of completion items in force calculations.
  • JFE LION connections have been added to the connections database.
  • All columns in the fluid grids now sort when their headers are clicked.
  • It is now possible to hide selected rows or columns in the Completion Equipment table.
  • A new button to delete conflicted completion items simplifies conflict handling.
  • Connections now initialize much faster.


  • It is now possible to disable the geometric collapse adjustment on custom loads.
  • On all tables and charts, there is a new right-click menu item Save As Image, which allows the user to save the current table or chart to a file as an image.
  • In the wellbore drawing, it is now possible to optionally display TVD depth values.
  • Logging has been added throughout.
  • In the distributed version, better messages appear when no more seats are available.
  • When the database cannot be opened, the message window now shows the path where the program expected to find a database.
  • There is a new field on the well definition tab called “Lease”, which is stored with the project.
  • When a conflict between fluids, connections, or grades is resolved, the formerly conflicted item is now explicitly removed from the list of conflicts.
  • The help documentation has been cross-referenced and expanded.
  • Error notification e-mail handler now sends the log file and the full error text.
  • The materials properties table now lists the program’s default Coefficient of Thermal Expansion.
  • The distributed license server now supports usage logging.
  • The load calculation progress bar is now visible from all tabs.
  • Allowable APB now displays a column showing the name of the string associated with the given annulus.
  • There is a new unit conversion for pressures, to Megapascals.
  • There is a new unit conversion for temperatures, Formation Temperature Gradient, used only in Undisturbed Temperature profile handling.
  • The report generator now also reports the Connection Performance table.

Standard Loads

  • There is a new load case, Packer Leak (Abandonment).
  • On liner burst loads, the user can now choose whether to use the Blade external pressure protocol or a hydrostatic external pressure calculation.
  • Load list that is displayed on adding a new load is now sorted by load category.
  • If a stress load’s temperature profile comes from a thermal case, and the data in that case does not extend to the string shoe, now using Undisturbed Temperature for the intervening depths.

Stress Results

  • It is now possible to hide selected rows in the Packer Envelope table. Hidden rows are not plotted.
  • All stress results have been migrated to WPF.

Thermal Simulator

  • In all four thermal modes, only input fields relevant to the given mode are now visible on the form.
  • Users can now regenerate colors on charts or select custom color combinations via right-click.
  • In circulating mode, the total area of all drill nozzles is now displayed.
StrinGnosis® 2.9 - February 2018
  • Stress results now show allowable wear in burst, collapse, and triaxial modes.
  • The VME envelope now considers asymmetric tension and compression for anisotropic grades.
  • There are new stress results columns for Minimum Required KISSC on the Overview and Safety Factors tables, available only for design levels based on Limit State Design, with a baseline indicator for the in-use grade.
  • In circulating mode, there are now inputs for the configuration of the drillhead nozzles.
  • Stress calculator tab has been migrated to WPF.
  • Thermal charts have been migrated to WPF, with improved handling and enhanced zoom capabilities.
  • YouTube – Release Notes StrinGnosis® 2.9
StrinGnosis® 2.8
  • Fluid Manager: all fluids used in Thermal and APB calculations can be user-defined.
  • Entire casing program tab has been migrated to WPF.
  • Three new standard loads on Tubing strings: Tubing Evacuation, Shut-In Tubing Leak, and a Generic Completion Load.
  • New standard load: Negative Pressure Test.
  • New standard load: Drilling with Maximum Mud Weight.
  • New thermal calculation mode: Circulating.
  • Completion Design features: packer operating envelope, plug inputs in standard loads, completion equipment ratings considered in stress calculations.
StrinGnosis® 2.7
  • The entire Thermal Simulator tab has been migrated to WPF.
  • There is a new Blade standard load: Bumping Cement Plug.
  • The database now contains specifications for over 100,000 connections manufactured by TenarisHydril.
  • Handling of connections greatly improved, in precision, accuracy, and storage.
  • RBD shows safety factor data at all depths on loads with failing SFs.
  • Custom load editing is entirely overhauled, adding many new features and much improved consistency and error handling.
  • All stress loads have much more flexible temperature handling, including support for custom temperature profiles.
  • Improved reporting and charting, consistency, and usability.
StrinGnosis® 2.6
  • This release adds the ability to define non-linear temperature deration profiles for materials; these can be described on the Grade input form. Note that the deration is no longer specified in the Design Basis. Any existing projects with non-default deration should be carefully examined.
  • Another new feature is the ability to enter Connection Usage Envelope data when entering parameters for a new connection. The envelope can then be optionally plotted on the VME diagram.
  • The look has been updated; floating tabs and docking behavior have been greatly improved and the program behavior at larger text sizes is improved.
  • The help documentation has been polished and expanded.