Process for the separation of hollow glass microspheres from muds containing them
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United States of America Patent
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Feb 28, 2006
Grant Date -
May 13, 2004
app pub date -
Nov 13, 2001
filing date -
Dec 15, 2000
priority date (Note) -
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Abstract
Process for recovering at least 70% of hollow glass microspheres having an average diameter, according to the ASTM D1214-1989, ranging from 5 to 200 μm contained in a mixture of drilling mud and cuttings which comprises: a) screening, if necessary, the mixture through one or more 5 to 20 mesh sieves; b) feeding the screened mixture to one or more cyclones and/or hydrocyclones arranged in series, each of which is fed with a volume flow-rate from 1.5 to 10 times higher than the maximum nominal operating value.
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