Technique for insulating a wellbore with silicate foam

Details Technique for insulating a wellbore with silicate foam Technique for insulating a wellbore with silicate foam

E - Fixed Constructions

21

B

166/16

E21B 43/24 (2006.01) E21B 36/00 (2006.01)

Patent

CA 1059020

ABSTRACT OF THE INVENTION Disclosed herein is a method for thermally insulating a well. The well is insulated by boiling a solution containing silicate in contact with well tubing to form a coating of silicate on the tubing. A fluid substantially free of silicate also contacts the well tubing to buffer a lower portion of the tubing from the silicate solution, This substantially silicate-free fluid prevents silicate foam coating on the lower portion of the tubing and thus alleviates problems associated with having silicate foam coated thereon. -1-

272954

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