Wells – Processes – Repairing object in well
Patent
1990-10-25
1992-06-02
Britts, Ramon S.
Wells
Processes
Repairing object in well
166284, 166372, 166387, E21B 2900
Patent
active
051179091
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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Bloys J. Benjamin
Bradshaw Roger D.
Riggs Kenneth R.
Wilton Bonsall S.
Atlantic Richfield Company
Britts Ramon S.
Martin Michael E.
Schoeppel Roger J.
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