Well conduit sealant and placement method
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United States of America Patent
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-
Jun 2, 1992
Grant Date -
N/A
app pub date -
Oct 25, 1990
filing date -
Oct 25, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Gas leakage from oil wells through casing thread connections and other small leakage spaces is reduced or eliminated by injecting into the lift gas flowstream a sealant composition comprising a carrier liquid, such as diesel fuel or water, an ethoxylated phenol surfactant and particulate silica and/or Gilsonite. A liquid sealant composition is injected into oil wells on artificial gas lift comprising arctic diesel fuel, a surfactant and solubilized Gilsonite in a weight ratio of about 10:1 diesel fuel to Gilsonite and diesel fuel to surfactant, respectively. Effective reduction in leakage flow rates is obtained over a relatively short time period (one to ten hours).
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