Cementing composition and aqueous hydraulic cementing solution comprising water-soluble, nonionic hydrophobically modified hydroxyethyl cellulose
CA 1317754 C · Owner: Aqualon Company · Inventors: Mclachlan, William C.; Lukach, Carl A.; Kirkland, Wiliam J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
0736p, Kirkland, Lukach & McLachlan Case 1 CEMENTING COMPOSITION COMPRISING, WATER-SOLUBLE NONIONIC HYDROPHOBICALLY MODIFIED, HYDROXYETHYL CELLULOSE AND ITS USE Abstract of the Disclosure, A cementing composition comprising a hydraulic cement and, as a fluid loss agent, a water soluble nonionic, hydrophobically modified hydroxyethyl cellulose having a hydroxyethyl M.S. of at least about 1.5 and a long chain alkyl group modifier having 6 to 25 carbon atoms attached to the cellulose, and its use as an oil well casing cement are, disclosed.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted May 18, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 18, 2010.
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