Controlling corrosion in gas-containing aqueous drilling fluid
Patent 4092252 Issued on May 30, 1978. Estimated Expiration Date: 
May 30, 1995. 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.
May 30, 1995. 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 References 2515207 2650197 2889276 2923681 3307625 3313362 3486560 3749554 Composition and method for drilling formations containing geothermal fluid Patent #: 4013568 InventorsAssigneeApplicationNo. 683092 filed on 05/04/1976US Classes:507/102, Contains intended gaseous phase at entry into wellbore175/69, Combined liquid and gaseous fluid175/71, Gaseous fluid or under gas pressure507/107, Humate component is fossilized (e.g., lignite, leonardite, brown coal, etc.)507/119, Polymer derived from acrylic acid monomer or derivative507/120Nitrogen is attached directly or indirectly to the acrylic acid monomer or derivative by nonionic bonding (e.g., acrylamide, acrylonitrile, etc.)ExaminersPrimary: Guynn, Herbert B.Attorney, Agent or FirmInternational ClassesC09K 007/02C09K 007/08 AbstractA composition and method for drilling wells through subterranean strata containing high temperature aqueous fluids using a gas-containing aqueous drilling fluid containing an alkaline material to raise the pH of the drilling fluid to provide corrosion protection in the liquid phase and a volatile water-soluble nitrogen-containing compound to provide corrosion protection in the gaseous phase. |
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