B - Operations – Transporting – 08 – B
Patent
B - Operations, Transporting
08
B
B08B 9/057 (2006.01) B08B 9/04 (2006.01)
Patent
CA 2318714
A Expandable Jet Scraper Cup (EJSC) is a resilient member that is attached to a vessel allowing the vessel to pass through restrictions and is used for scraping the interior of a cylindrical object like a pipeline or used to propel a vessel through a pipeline. The EJSC is a disk-like resilient member 1 that is mounted on the body of a vessel. The EJSC is used to propel a vessel through a pipeline for cleaning or other activities. The outside diameter of the EJSC is normally larger than the internal diameter of the pipe which causes the outer lip 2 to be compressed providing a seal as the vessel travels along the pipeline. As the vessel travels the outer lip 2 wears and eventually the Edison's outer lip 2 is no longer in contact with the internal pipe wall. Traditional cup design has focused on keeping the scraper lip 2 in close contact with the pipe wall so that a good seal is maintained and no fluid bypasses the vessel. When the scraper lip 2 is in close contact with the pipe wall it will also scrape debris such as wax off the interior of the pipe wall. In scraping wax off the pipewall, the wax is pushed in front of the vessel causing the wax to build up and slide under the scraper lip and as a result, an even layer of wax may be deposited along the length of the pipeline. The EJSC is designed to allow a calibrated amount of fluid to bypass the EJSC lip 2 so that wax scraped off the pipewall is jetted away. The EJSC is also designed to allow the pipeline operator to take advantage of the resiliency of the scraper cup and expand it laterally as the scraper wears down. Presently once a scraper cup is worn and does not provide an interference fit with the pipe wall it is discarded or refurbished. Refurbishment costs are about two thirds of a new cup. The EJSC can also be refurbished. The structure of the EJSC is radically different than existing scraper cups as it is designed to allow fluid to bypass between the cup lip and the pipewall jetting away wax and debris and cap be expanded. The jetting and expansion can be used individually or together.
Gowling Lafleur Henderson Llp
Savard Donald D.
LandOfFree
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