Composition and method for drilling high temperature reservoirs
Patent 4088583 Issued on May 9, 1978. Estimated Expiration Date: 
May 9, 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 9, 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 3269468 3313362 3486560 3525688 3749554 InventorsAssigneeApplicationNo. 746937 filed on 12/02/1976US Classes:507/102, Contains intended gaseous phase at entry into wellbore175/69, Combined liquid and gaseous fluid507/131, Oxygen is attached directly or indirectly to carbon by nonionic bonding507/136Organic component contains ether linkage (e.g., PEG ether, etc.)ExaminersPrimary: Guynn, Herbert B.Attorney, Agent or FirmInternational ClassesC09K 007/02C09K 007/08 AbstractComposition and method for drilling a well into a high temperature subterranean reservoir, such as one containing a geothermal fluid, wherein there is used an aqueous foam drilling fluid containing (1) water, (2) gas, (3) a foaming agent, (4) an erosion and corrosion inhibitor, (5) a water-soluble or water-dispersible carboxyalkyl cellulose ether or polyalkylene oxide polymer which both controls the fluid loss of the foam and toughens it, and, optionally, (6) a bit lubricant and/or (7) an anti-torqueing agent.Field of SearchCombined liquid and gaseous fluid |
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