Subsea 7 has filed a patent for a method to create a weld between a liner of a section of lined pipe and an electrofusion fitting. The fitting includes a heating element and induction coil for the welding process. GlobalData’s report on Subsea 7 gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Subsea 7, Ship loading/unloading cableways was a key innovation area identified from patents. Subsea 7's grant share as of January 2024 was 56%. Grant share is based on the ratio of number of grants to total number of patents.
Welding method for lined pipe and electrofusion fitting
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The patent application (Publication Number: US20240019066A1) describes a method for repairing a lined pipe by removing a section of the pipe, inserting a sleeve with a heating element into the ends of the pipe, and using electromagnetic induction to heat the element. This method allows for the simultaneous heating of both ends of the sleeve, facilitating the repair process efficiently.
Additionally, the patent application details an electrofusion fitting for joining liners in sections of lined pipe, featuring heating elements that can be coils, bands, loops, meshes, or grids. These heating elements are designed to produce circumferential welds between the fitting and the pipe lining. The fitting also includes features such as induction coil locators, temperature sensors, and the option for thermoplastic material sleeves, providing a comprehensive solution for repairing lined pipes. The application also covers an apparatus for energizing the heating elements in the electrofusion fitting, ensuring a seamless repair process for lined pipes.
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