<p>A lightweight cement composition, used to seal a pipe in a well bore penetrating a zone or formation which readily fractures at low hydrostatic pressure, comprises hydraulic cement, water and an additive comprising an aqueous suspension of microspheres containing a water swellable clay suspending agent.</p>
申请公布号
EP1316540(A3)
申请公布日期
2010.06.02
申请号
EP20020258299
申请日期
2002.12.02
申请人
HALLIBURTON ENERGY SERVICES, INC.
发明人
BROTHERS, LANCE E.;BRADEN, JAMES A.;DAO, BACH;KEENER, KRISTA L.;VIJN, JAN PIETER
