Method and composition for scavenging sulphide in drilling fluids and composition
January 16, 2022. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesUse of concentrated chelated iron reagent for reducing pollutant content of a fluid Scavenging hydrogen sulfide in an oil well Shale and salt stabilizing drilling fluid Corrosion inhibitor for heavy brines Downhole hydrogen sulfide scavenging in drilling mud using iron chelates Dynamic polysulfide corrosion inhibitor method and system for oil field piping Magnetic iron oxide particles and method of producing same Process for the preparation of a stable salt-free iron chelate for use in hydrogen sulfide abatement Cementitious compositions and methods for use in subterranean wells Removal of H2S in drilling mud Patent #: 6365053 InventorAssigneeApplicationNo. 10053156 filed on 01/16/2002US Classes:210/725, Utilizing organic precipitant175/65, Boring with specific fluid210/727, Including organic agent210/729, Utilizing organic precipitant507/139, Organic component contains an alcohol group507/145Inorganic component is soluble in boring mediumExaminersPrimary: Hruskoci, Peter A.Attorney, Agent or FirmForeign Patent References
International ClassC02F 158AbstractAn environmentally friendly method and composition is provided for removing hydrogen sulphide from fluids at high pH. The method and composition are particularly suited for removing hydrogen sulphide from drilling fluids used in drilling boreholes in hydrocarbon bearing subterranean formations, and are suitable for use with any drilling fluid, including polymer based drilling fluids. The sulphide scavenger used in the method and composition is a ferrous gluconate, an organic iron chelating agent stable at pH as high as 11.5, the pH preferred for drilling fluids that may encounter hydrogen sulphide. Further, this additive has been found to enhance the resilience of the rheological properties of drilling fluids to hot rolling and comparable field conditions.Other References
Field of SearchIncluding degassingUtilizing organic precipitant Including organic agent Including organic agent Utilizing organic precipitant Including geographic feature (e.g., drainage ditch, septic, pond) Including degassing Boring with specific fluid Organic component contains an alcohol group Inorganic component is soluble in boring medium |
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