Methods and compositions for sealing subterranean zones
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United States of America Patent
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May 9, 2000
Grant Date -
N/A
app pub date -
Nov 26, 1997
filing date -
Nov 26, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention provides methods and compositions for sealing subterranean zones. The methods of the invention basically comprise the steps of preparing a sealing composition comprised of an aqueous alkali metal silicate solution, a gelling agent and a delayed acid activator for causing the composition to set into a rigid mass, placing the sealing composition in said subterranean zone and allowing the sealing composition to set into a rigid sealing mass therein.
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