Expert systems for materials selection or tailoring in the ... · Material Selection for OWT Slide...
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Expert systems for materials selection or
tailoring in the design of O&G equipment
Salimon A., National University of Science and Technology “MISiS”,
Center for Composite Materials
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Ashby’ method in material selection.
Performance analysis
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Expert systems for materials selection or tailoring in the design of O&G
equipment. Salimon A
Materials are interesting as the combination of useful consumer properties - attributes.
Materials can’t be separated from their available Shapes and applicable Processes a) to produce (synthesize); b) to shape; c) to join (assembly); d) to finish.
Optimal rational selection of a Material for an Application (a component) starts form the analysis of Function, Objective and Constraints.
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Ashby’ method in material selection.
Performance analysis
Slide 3
Function What does component do ?Examples: Withstand concentrated or distributed load (force), conduct electric current, insulates volume from heat fluxes etc.
Objective What is to be maximized or minimized?Examples: Minimize cost, mass, eco-impact; maximize safety, energy content, service life.
Constraints a) What are non-negotiable conditions to be satisfied? b) What are compromise or desirable conditions?
Examples: a) Geometry specified, service temperature or medium;
b) stiffness, strength, cost.
Expert systems for materials selection or tailoring in the design of O&G
equipment. Salimon A
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Slide 4Expert systems based on DB applications
Expert systems for materials selection or tailoring in the design of O&G
equipment. Salimon A
All Materials in DB
Filtering (applying non-negotiable
constraints)
Ranking (by material indices)
Expertize and testing
Final Choice
Number of
candidates
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Slide 5
Material Selection for OWT
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Slide 6
Material Selection for OWT
Function OWT – strong support loaded in expansion
Objective (possible) а) min cost; b) min mass; c) mах service life;
d) mах length for deep wells.
Constraints a)Operational temperature at least +150 С, +200 С, +300
С … Medium pH 2…12, organic solvents, H2S, СО2 Abrasive wear,
cavitation … Low temperature resistance -60 С Geometry specified
b) OWT must not failure under own weight and/or as a result of corrosion.
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Slide 7
Material Selection for OWT. Minimal Cost
Strength over unit
cost.
No filters for rigid
constraints.
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Slide 8
Material Selection for OWT. Minimal Cost
Strength over unit cost. Filtering
over durability in salt water, weak
acids and alkalis and organic
solvent.
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Slide 9
Material Selection for OWT. Minimal mass
Strength over unit
mass.
No filters for rigid
constraints.
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Slide 10
Material Selection for OWT. Minimal mass
Strength over unit mass.
Filtering over durability in
salt water, weak acids and
alkalis and organic solvent.
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Material Selection for OWT. Minimal mass
Expert systems for materials selection or tailoring in the design of O&G
equipment. Salimon A
Strength over unit
mass at +200 C
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Modern materials for O&G equipment – real life and future
• Economical issues are currently dominating – mainly low alloyed and stainless
steels are applied worldwide, although with special coatings. Al alloys – limited
applications.
• Operational costs, logistics, special well conditions may put forward wider use of
Al alloys, start with Ti, Mg and Ni alloys and modern composites – GFRP and
CFRP based on PEEK and PPS, carbon-based materials.
• Principal trend - hybrid and composite materials purposely designed in
collaboration of designers and materials science engineers.
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Expert systems for materials selection or tailoring in the design of O&G
equipment. Salimon A
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Thank you for attention !!!
Welcome to collaborate.
Acknowledgment to Granta Design, Cambridge, UK
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Expert systems for materials selection or tailoring in the design of O&G
equipment. Salimon A