Cement composition containing chemically crosslinked polyvinyl alcohol (PVA)
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United States of America Patent
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Jan 14, 1997
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N/A
app pub date -
Mar 27, 1996
filing date -
Apr 23, 1993
priority date (Note) -
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Abstract
The invention relates to a new, chemically crosslinked PVA. Its application is that of a fluid loss control agent in fluids used in the oil industry, in particular cement slurries, separating fluids, or 'spacers', and drilling muds. Its advantages are that it does not delay the setting of the cement, that it has high temperature properties that are relatively insensitive to external conditions.
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