Vortex inhibitor dispersal pig

Brushing – scrubbing – and general cleaning – Implements – Pipe – tube – or conduit cleaner

Reexamination Certificate

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Details

C015S104050

Reexamination Certificate

active

07827646

ABSTRACT:
A pipeline pig—that moves by pressurized gas flow and provides for distribution of treating liquid subsisting in a lower portion of a pipeline—having a longitudinally extending nozzle located at a forward end of the pig, an array of helical-shaped louvers located on the discharge side of the nozzle and arranged circumferentially, and two perforated sealing elements that create a cavity that serves as a low pressure plenum. The louvers create a vortex effect and the perforated sealing elements allow vapor and liquid in front of the pig to be drawn into the cavity and discharged through the ports and back into the discharge of the nozzle. In this manner, liquid subsisting at a bottom portion of the pipeline is dispersed to achieve a complete 360° coating application of the interior cylindrical wall of the pipeline.

REFERENCES:
patent: 3209988 (1965-10-01), Fox et al.
patent: 3708819 (1973-01-01), Breston
patent: 4411039 (1983-10-01), Timmins et al.
patent: 4425385 (1984-01-01), Coulter et al.
patent: 4498932 (1985-02-01), Kruka
patent: 5528790 (1996-06-01), Curran
patent: 5795402 (1998-08-01), Hargett et al.
patent: 6527869 (2003-03-01), Bourg
patent: 6874193 (2005-04-01), Pruett
International Search Report and Written Opinion corresponding to PCT/US09/31543; issued by the International Searching Authority (ISA/US) on Mar. 9, 2009; 9 pages.

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