Technique for insulating a wellbore with silicate foam
Patent
·
OSTI ID:6560893
A method is described 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 on it. (12 claims)
- Assignee:
- Exxon Production Res. Co.
- Patent Number(s):
- US 4024919
- OSTI ID:
- 6560893
- Country of Publication:
- United States
- Language:
- English
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