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Patent Applicant
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
October 25, 2022
Patent Application Number
16668730
Date Filed
October 30, 2019
Patent Citations
Patent Primary Examiner
This document relates to methods for preventing or inhibiting the formation of micro-cracks and fractures in the cement of an oil well using cement compositions that contain cross-linked polyrotaxane additives. The cement compositions containing the cross-linked polyrotaxane additives exhibit increased stiffness without suffering a decrease in compressive strength, as compared to the same cement without the cross-linked polyrotaxane additive.
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