Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras
A Marine Riser having a Functionally Graded Material (FGM) Layers and a Method of Manufacturing thereof
Categories for this Invention
Technology: Marine Riser
Category: Energy,Extraction and Mining
Industry: Marine Energy Sector, Offshore Engineering
Application: Oil and gas industrial application
Market: The global market size was estimated to reach a valuation of USD 3.8 Billion in the year 2022 With a steady CAGR of 2.2% from 2023 to 2033, this market is expected to reach USD 4.1 Billion by 2023 and USD 4.9 Billion by 2033.
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Problem Statement
- Marine risers are cylindrical conduits used for transporting oil and gas from offshore reservoirs to platforms or vessels.
- They facilitate drilling, well completion, fuel production, and injection.
- However, they can suffer from corrosion due to hydrogen sulphide, chlorides, and carbon dioxide gases in marine environments.
- Marine risers made from carbon-manganese steel can crack due to extreme loads, causing corrosion and leakage.
- Composite materials face delamination, crack formation, premature failure, design and manufacturing challenges due to high-pressure, high-temperature conditions, lower D/t ratio, and special treatments.
- This disclosure aims to overcome these limitations.
Technology
- A marine riser having functionally graded material (FGM) layers, comprising:
Core layer
- carbon-manganese steel, with a core layer that allows fluid flow
First intermediate layer
- Duplex stainless-steel material, provided concentrically around the core layer
Second intermediate layer
- Nickel material, provided concentrically around the first intermediate layer
Outer layer
- Titanium material provided over the second intermediate layer
Key Features / Value Proposition
- Core layer formed of carbon-manganese steel material comprises a martensite microstructure.
- The First intermediate layer formed of duplex steel material comprises a ferrite and austenite microstructure.
- The Second intermediate layer formed of nickel prevents material interaction between the duplex stainless-steel material of the first intermediate layer and the titanium material of the outer layer Properties of functionally graded material layers
- Yield Strength of about 513 MPa to 547 Mpa
- Ultimate Tensile Strength of about 579 MPa to 619 Mpa
- Elongation of about 11 %
- Laying operations are performed by Wire Arc Additive Manufacturing (WAAM) technology.
- Corrosion-The outer layer, the first and the second intermediate layers act as corrosion resistant layers of the marine riser.
- Exhibit improved corrosion resistance, mechanical properties and high temperature high pressure resistance under marine conditions.
Questions about this Technology?
Contact For Licensing
sm-marketing@imail.iitm.ac.in
ipoffice2@iitm.ac.in
Research Lab
Prof. Srinivasan Chandrasekaran
Department of Ocean Engineering.
Intellectual Property
- IITM IDF Ref. 1978
- Patent No: IN 490784
Technology Readiness Level
TRL-4
Experimentally validated in Lab