Cementing composition and aqueous hydraulic cementing solution comprising water-soluble, nonionic hydrophobically modified hydroxyethyl cellulose
First Claim
1. 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.
5 Assignments
0 Petitions
Accused Products
Abstract
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.
-
Citations
25 Claims
- 1. 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.
-
21. An aqueous hydraulic cement slurry comprising:
-
(a) water; (b) a hydrualic cement; and (c) as a fluid loss control additive, 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 water-soluble, nonionic hydroxyethyl cellulose polymer. - View Dependent Claims (22, 23, 24, 25)
-
Specification