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

1976-06-16

1977-05-24

Novosad, Stephen J.

Wells

Processes

Heating, cooling or insulating

166 57, E21B 4324

Patent

active

040249190

ABSTRACT:
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.

REFERENCES:
patent: 3525399 (1970-08-01), Bayless et al.
patent: 3664424 (1972-05-01), Penberthy, Jr. et al.
patent: 3664425 (1972-05-01), Penberthy, Jr. et al.
patent: 3861469 (1975-01-01), Bayless et al.
Leutwyler et al., "Temperature Effects on Subsurface Equipment in Steam Insection Systems", Journal of Petroleum Technology, 1/1965, pp. 93-101.

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