Solidification of water based muds
Patent 5058679 Issued on October 22, 1991. Estimated Expiration Date: 
March 19, 2011. 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.
March 19, 2011. 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 2416035 2822873 3168139 3499491 3525688 3557876 3887009 3921717 Method for improving the strength of a water-saturated soft soil Method of drilling and cementing a well using a drilling fluid convertible in place into a settable cement slurry InventorsAssigneeApplicationNo. 671627 filed on 03/19/1991US Classes:166/293, Cement or consolidating material contains inorganic water settable and organic ingredients166/292Using specific materialsExaminersPrimary: Suchfield, George A.Foreign Patent References
International ClassesE21B 033/13E21B 033/14 AbstractA drilling mud is converted in-situ to a cement by addition of blast furnace slag. | |
