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AssigneeAqualon Company
InventorsWilliam J. Kirkland, Carl A. Lukach, William C. McLachlan
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A novel cementing composition comprising a hydraulic cement and, as a fluid loss agent, water-soluble, nonionic hydrophobically modified hydroxyethyl cellulose, are disclosed. Preferably, the cementing composition further comprises water-soluble, nonionic hydroxyethyl cellulose as a second fluid loss agent. A novel aqueous slurry containing the cementing composition, a novel process of using the aqueous slurry to fill an annulus between a borehole wall and casing, and a novel composition of matter comprising specified amounts of water-soluble, nonionic hydrophobically modified hydroxyethyl cellulose and water-soluble, nonionic hydroxyethyl cellulose, are also disclosed.
A cementing composition comprising a hydraulic cement and, as a fluid loss control additive, a water-soluble, nonionic hydrophobically modified hydroxyethyl cellulose having a hydroxyethyl M.S., of at least about 1.5, wherein the hydrophobic modifier is a long chain alkyl group having 6 to 25 carbon atoms attached to the cellulose in an amount of from about 0.2 to about 4%, by weight of the total weight of the water-soluble, nonionic hydrophobically modified hydroxyethyl cellulose.
An aqueous hydraulic cement slurry comprising:
Dependencies are inferred from the claim text.