Process for mitigation of wellbore contaminants
AssigneeClariant Finance (BVI) Limited
InventorsTerry Arnold, William Robert Graham, James Dennis Cranmer
Life of this patent
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Abstract
A method is disclosed for intermittently mitigating hazardous sulfur compounds, such as hydrogen sulfide, mercaptans and sulfur oxides, from a fluid in the head space of a wellbore. The method comprises contacting the fluid with a foamed aqueous stream comprising an active scavenging agent, such as a triazine, and a stiff foaming agent. The scavenging agent reacts with hazardous sulfur compounds to eliminate the compounds from the fluid stream in the vapor space of the wellbore without withdrawing the hydrocarbon from the wellbore and without releasing hazardous sulfur compounds to the environment.
Claims18
A process for intermittently mitigating hazardous sulfur compounds in a wellbore defining a vapor space between a surface end and a hydrocarbon fluid with said wellbore, said process comprising injecting an effective amount of a foamed aqueous stream comprising an active scavenging agent and a still foaming surfactant into the vapor space for an effective period of time to reduce pressure at the wellbore and to significantly reduce hazardous sulfur compounds in the vapor space without withdrawing hydrocarbon fluid or hazardous sulfur compounds.
A process for intermittently mitigating hazardous sulfur compounds in a wellbore defining a vapor space between a surface end and a hydrocarbon fluid within said wellbore, said process comprising injecting an effective amount of a foamed aqueous stream comprising an active scavenging agent and a stiff foaming surfactant into the vapor space for an effective period of time to reduce pressure at the wellbore and to significantly reduce hazardous sulfur compounds in the vapor space without withdrawing hydrocarbon fluid or hazardous sulfur compounds, wherein the hazardous sulfur compounds include hydrogen sulfide.
Dependencies are inferred from the claim text.