InterCorr Software

InterCorr International, Inc.
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Environment Evaluation
Software Systems
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In a typical Socrates-B consultation, you will be specifying data relevant to:

  • Application and mechanical requirements
  • Environmental data to characterize general corrosion, stress corrosion cracking and localized corrosion for each of the non-production environments, (completion fluids, stimulation acids or injected waters).

As the user specifies environmental data, the program calculates and displays two synergistic corrosion and cracking characterization parameters:

Environmental severity, a measure of general corrosivity of the operating system, is computed for completion fluids and injected waters as a function of applicable parameters, such as:

  • Acid gases H2S and CO2
  • HCO3
  • Chlorides
  • Min. and Max. Temperature
  • Aeration
  • Chlorination
  • Inhibition efficiency

Socrates-B also determines the system pH based on acid gas partial pressures, buffering and temperature where it is relevant. In the case of stimulation acids, the system calculates a required pitting index as the measure of environmental severity.

Required pitting index (RPI) is calculated based on environmental severity and maximum operating temperature for completion fluids and injected waters. The only materials displayed in the results window are those that have a pitting index higher than the computed RPI. Pitting Index for materials in Socrates-B is computed using the following relationship:

Once valid data is supplied for each kind of environment, the system will display materials that meet the specifications. Selected materials within a specific class can be displayed by double clicking on any folder, shown below. To view the information for a specific material listed, double click on the name of the alloy.

Soc B Materials List

Application: Material choice is largely dependent on the application. Material required for tubing may not be suitable for flowline conditions. Any application from tubing, liners, wellheads, surface equipment, flowlines and speciality equipment can be chosen for material selection.

Yield Strength: For superior resistance to corrosion and environmental embrittlement, lower strength materials are preferable. Socrates-B provides a subclass consisting of different strengths.

Hardness: Typically, the yield strength relates to a range of applicable hardness for the material. In some cases, though, materials are specified by hardness in order to limit cracking due to environmental susceptibility. For a particular grade of material, it is common to specify hardness as a limiting criterion. High hardness materials are particularly susceptible to cracking.

Material Condition: Usually, applications require specific types of material treatment in fabrication and the selected material should be capable of undergoing the specified material conditioning. The material conditioning method affects the material properties depending on whether the material has been cast, wrought, heat treated or cold worked. Further, other mechanical requirements typically drive the type of processing the material is subjected to. For example, high strength tubulars are typically cold worked.

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InterCorr International, Inc.
14503 Bammel-N. Houston, Suite 300
Houston, Texas USA 77014
Tel: 281 444-2282, Fax: 281 444-0246
copyright 2000 InterCorr International, Inc