C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 28/02 (2006.01) C04B 14/00 (2006.01) C04B 14/24 (2006.01) C04B 28/04 (2006.01) C04B 28/08 (2006.01) C04B 40/06 (2006.01) E21B 33/13 (2006.01) E21B 33/138 (2006.01)
Patent
CA 2476450
The storable, low-density, hydraulically-active, cementitious slurry of the invention is suitable for cementing within a subterranean formation for oil or gas wells. The low-density slurry comprises a hydraulically-active cementitious material, a set retarder, a plasticizer, glass or ceramic micro- spheres, and a strengthening agent. Further the slurry is substantially free of a suspension agent. The storable, low-density, hydraulically-active, cementitious slurry is made by adding glass or ceramic micro-spheres to a hydraulically-active cementitious material, adding a strengthening agent to the microsphere containing composition, and mixing the resulting composition with water, a set retarder, and a plasticizer to generate a slurry, wherein the set retarder is present in an amount sufficient to allow storage of the slurry.
Bray Windal S.
Dillenbeck Robert L.
Heinold Thomas
Rogers Murray J.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Bj Services Company
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