Patent ID: 7998276

Claim:
A method of remediating deposits within a pipeline comprising: providing a pig within said pipeline which sealingly engages the internal diameter of said pipeline, restraining movement of said pig, pumping down the pipeline to flow at a first velocity without taking return flow back up the pipeline, providing a first passageway through said pig for pumping through flow restrictions on said pig to increase said velocity of said flow to enhance the cleaning effectiveness of the remediation relative to the cleaning effectiveness of said flow at said first velocity, providing a second passageway through said pig with less flow restriction than said first passageway for flow through said pig, and providing a selector valve for alternately directing flow through said pig to said first passageway and to said second passageway each time said flow is stopped and restarted wherein said selector valve provides a flow diverter to alternately direct said flow to said first passageway and said second passageway wherein when said flow is directed to said first passageway, said flow moves a gate to block said flow from said second passageway and, wherein when said gate moves to block said flow from said second passageway, said gate provides a force to urge said diverter to a position to direct said flow to said second passageway.