FLOWABLE SLUSH OF FROZEN PARTICLES FOR ICE PIGGING
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United States of America Patent
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Issued Date -
Aug 4, 2022
app pub date -
Jun 4, 2020
filing date -
Jun 7, 2019
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Abstract
This invention relates to improvements in and relating to ice pigging, and comprises a flowable slush of frozen particles for ice pigging a pipework, comprising, an aqueous liquid medium, a multiplicity of frozen particulates of said aqueous liquid medium, a freezing point depressant, selected from a hydroxide ion, said hydroxide ion present in the range of less than 10 wt %.
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