Method of thermally insulating a wellbore

Details Method of thermally insulating a wellbore Method of thermally insulating a wellbore

1998-10-13

2000-07-11

Tsay, Frank

Wells

Processes

Cementing, plugging or consolidating

166300, E21B 3313

Patent

active

060858397

ABSTRACT:
There is provided a method for insulating a wellbore comprising providing a wellbore, providing a casing within the wellbore, wherein an annulus is formed between the wellbore and the casing, filling the annulus with an emulsion of liquid sodium silicate and an acid forming agent, increasing a temperature in the annulus, and forming a silica gel in the annulus, the silica gel effective in insulating the wellbore. A steam injection tubing may be provided within the casing, wherein a second annulus is formed between the casing and the steam injection tubing and the second annulus is filled with the emulsion.

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Penberty, W.L., and Bayless, J.H. (1973), "Silicate Foam Wellbore Insulation," Society of Petroleum Engineers, Paper 4666.

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