Conoco Inc.

Kang Yang, Deceased

Joe D Allison

Gifford G McClaflin

Sally A Thomas

A process for converting sulfide ion present in a solution to innocuous, water soluble sulfur species is provided. The process basically includes the steps of contacting the sulfide ion with an oxidizing agent to oxidize it to the water soluble sulfur species and admixing a surface active agent with the solution in an amount sufficient to inhibit precipitation of elemental sulfur and to promote subsequent oxidation. To enhance the formation of the water soluble sulfur species and to speed up the reaction, the oxidation reaction is conducted under alkaline conditions.

Process for converting sulfide ion to innocuous, solubile sulfur species

Composition and method for treating wellbores and well formations to remove and inhibit accumulations of paraffin. The composition comprises a liquid mixture of a water soluble ethoxylated alkyl phenol and an alcohol containing one to four carbon atoms. Preferred are a water soluble nonoxynol having an average number of ethylene oxide units per molecule in the range of approximately 20 to 50 and methyl alcohol. The composition is circulated in the wellbore either continuously or in batch treatments.

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late of Kay County, OK, United States of America

Kang Yang, Deceased