Pipeline remediation method with wire rope pig

Details Pipeline remediation method with wire rope pig Pipeline remediation method with wire rope pig

2011-08-16

2011-08-16

Kornakov, Michael (Department: 1714)

Cleaning and liquid contact with solids

Processes

Using solid work treating agents

C134S022110, C134S022120

Reexamination Certificate

active

07998276

ABSTRACT:
A method of remediating deposits within a pipeline by a pig within the pipeline which sealingly engages the internal diameter of the pipeline, holding back on the movement of the pig with a wire rope, pumping down the pipeline, providing a first passageway through the pig for pumping through flow restrictions on the pig to increase the velocity of the flow to enhance the effectiveness of the remediation, providing a second passageway through the pig with less flow restriction than the first passageway for flow through the pig during retrieval, and providing a selector valve for alternately directing flow through the pig to the first passageway and to the second passageway each time the flow is stopped and restarted.

REFERENCES:
patent: 3768500 (1973-10-01), Kauer et al.
patent: 2004/0194809 (2004-10-01), Crawford et al.

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