Flexible grout composition and method
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United States of America Patent
Stats
-
Dec 12, 1989
Issued Date -
N/A
app pub date -
Oct 3, 1988
filing date -
Oct 15, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A flexible grout composition is used to cement a conduit within a bore hole to prevent fluid loss, for sealing and grouting well casings, plugging abandoned wells, and waterproofing earthen structures. The flexible grout composition consists essentially of water, a water-swellable clay, such as bentonite; optionally a particulate filler; and a dispersing agent for the water-swellable clay, such as sodium acid pyrophosphate (SAPP). The grout composition is mixed with water to form a slurry and the slurry is pumped into its intended location, for example, within the annulus defined between an outer surface of a conduit or casing disposed within a bore hole, and the surrounding earthen formation formed, for example, by drilling.
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