C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 8/46 (2006.01) C09K 8/467 (2006.01) E21B 33/13 (2006.01) E21B 33/138 (2006.01)
Patent
CA 2525931
The present invention provides methods of cementing subterranean zones penetrated by well bores using biodegradable dispersants. A cement composition of the invention comprises a hydraulic cement, sufficient water to form a slurry and a water soluble biodegradable cement dispersant comprising a polyamide graft copolymer containing at least one side chain formed from aldehydes and sulfur-containing acids or their salts.
La présente invention concerne des procédés de cimentation de zones souterraines percées par des puits de forage au moyen de dispersants biodégradables. Une composition de ciment de l'invention comprend un ciment hydraulique, suffisamment de l'eau pour former une suspension et un dispersant à base de ciment biodégradable hydrosoluble comprenant un copolymère greffe de polyamide contenant au moins une chaîne latérale formée d'aldéhydes et d'acides contenant du souffre ou leurs sels.
Brenneis Chad D.
Chatterji Jiten
Cromwell Roger S.
Halliburton Energy Services Inc.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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