Methods and compositions for sealing subterranean zones

Details Methods and compositions for sealing subterranean zones Methods and compositions for sealing subterranean zones

E - Fixed Constructions

21

B

E21B 33/13 (2006.01) C04B 22/14 (2006.01) C04B 28/02 (2006.01) C08L 33/26 (2006.01) C09K 8/46 (2006.01) C09K 8/504 (2006.01) C09K 8/508 (2006.01)

Patent

CA 2413694

Methods and compositions for sealing subterranean zones penetrated by well bores are provided. The methods basically comprise the steps of introducing a sealing composition into the subterranean zone comprised of a hydraulic cement, sufficient water to form a slurry and a rapidly acting thixotropy providing gelling agent, and allowing the sealing composition to remain at rest in the zone whereby the sealing composition rapidly gels and then sets into a hard impermeable mass therein.

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