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publicationDate 2003-06-04-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber EP-1316539-A2
titleOfInvention Well cement compositions
abstract Lightweight well cement compositions, comprised of a hydraulic cement, water andnan additive comprising a suspension of microspheres in water gelled with sodium bentonite,nare used in the annulus between a pipe and the well bore for sealing the pipe in zones ornformations which readily fracture at low hydrostatic pressure.
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