[특허]Stable and biodegradable foamed cement slurries, additives and methods

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C04B-024/12 C04B-038/10
출원번호	US-0921689 (2004-08-19)
발명자 / 주소	Chatterji, Jiten Brenneis, D. Chad King, Bobby J.
출원인 / 주소	Halliburton Energy Services, Inc.
대리인 / 주소	Baker Botts L.L.P.
인용정보	피인용 횟수 : 3 인용 특허 : 46

초록 ▼

The present invention relates to stable and biodegradable foamed cement slurries, additives and methods. A foamed cement slurry of the invention comprises a hydraulic cement, sufficient water to form a slurry, sufficient gas to form a foam and a biodegradable foaming and stabilizing additive compris

The present invention relates to stable and biodegradable foamed cement slurries, additives and methods. A foamed cement slurry of the invention comprises a hydraulic cement, sufficient water to form a slurry, sufficient gas to form a foam and a biodegradable foaming and stabilizing additive comprising a mixture of a capryl/capramido propyl betaine surfactant and a capryl/capramido propyl dimethyl amine oxide surfactant.

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1. A foamed cement slurry comprising:a hydraulic cement;water;a gas; anda foaming and stabilizing additive comprising a mixture of a capryl/capramido propyl betaine surfactant and a capryl/capramido propyl dimethyl amine oxide surfactant.2. The foamed cement slurry of claim 1 wherein the hydraulic c

1. A foamed cement slurry comprising:a hydraulic cement;water;a gas; anda foaming and stabilizing additive comprising a mixture of a capryl/capramido propyl betaine surfactant and a capryl/capramido propyl dimethyl amine oxide surfactant.2. The foamed cement slurry of claim 1 wherein the hydraulic cement comprises at least one of the following: Portland cement, slag cement, silica cement, pozzolana cement or aluminous cement.3. The foamed cement slurry of claim 1 wherein the water comprises at least one of the following: fresh water, an unsaturated salt solution or a saturated salt solutions.4. The foamed cement slurry of claim 1 wherein the water is present in an amount in the range of from about 35% to about 100% by weight of hydraulic cement therein.5. The foamed cement slurry of claim 1 wherein the gas comprises at least one of the following: air or nitrogen.6. The foamed cement slurry of claim 1 wherein the gas is present in an amount in the range of from about 10% to about 80% by volume of the cement slurry.7. The foamed cement slurry of claim 1 wherein the foaming and stabilizing additive is a mixture of 95% by weight capryl/capramido propyl betaine surfactant and 5% by weight capryl/capramido propyl dimethyl amine oxide surfactant.8. The foamed cement slurry of claim 1 wherein the foaming and stabilizing additive is present in an amount in the range of from about 0.8% to about 10% by volume of the water therein.9. The foamed cement slurry of claim 1 wherein the foaming and stabilizing additive stabilizes the slurry at temperatures in the range of from about 50° F. to about 400° F.10. The foamed cement slurry of claim 1 wherein the foaming and stabilizing additive is biodegradable.11. An additive for foaming and stabilizing a cement slurry comprising a mixture of a capryl/capramido propyl betaine surfactant and a capryl/capramido propyl dimethyl amine oxide surfactant.12. The additive of claim 11 wherein the capryl/capramido propyl betaine surfactant is present in the mixture in an amount of about 95% by weight and the capryl/capramido propyl dimethyl amine oxide surfactant is present in an amount of about 5% by weight.13. The additive of claim 11 wherein the mixture of the capryl/capramido propyl betaine surfactant and the capryl/capramido propyl dimethyl amine oxide surfactant stabilizes a foamed cement slurry at temperatures in the range of from about 50° F. to about 400° F.14. The additive of claim 11 wherein the additive is biodegradable.15. A method of cementing comprising the steps of:providing a foamed cement slurry comprising a hydraulic cement, water, a gas and a foaming and stabilizing additive comprising a mixture of a capryl/capramido propyl betaine surfactant and a capryl/capramido propyl dimethyl amine oxide surfactant;placing the foamed cement slurry in a location to be cemented; andallowing the cement slurry to set.16. The method of claim 15 wherein the hydraulic cement in the slurry comprises at least one of the following: Portland cement, slag cement, silica cement, pozzolana cement or aluminous cement.17. The method of claim 15 wherein the water in the slurry comprises at least one of the following: fresh water, an unsaturated salt solutions or a saturated salt solutions.18. The method of claim 15 wherein the water in the slurry is present in an amount in the range of from about 35% to about 100% by weight of hydraulic cement therein.19. The method of claim 15 wherein the gas in the slurry comprises at least one of the following: air or nitrogen.20. The method of claim 15 wherein the gas in the slurry is present in an amount in the range of from about 10% to about 80% by volume of the cement slurry.21. The method of claim 15 wherein the foaming and stabilizing additive in the slurry is a mixture of 95% by weight capryl/capramido propyl betaine surfactant and 5% by weight capryl/capramido propyl dimethyl amine oxide surfactant.22. The method of claim 15 wherein the foaming and stabilizing additive in the slurry is present in an amount in the range of from about 0.8% to about 10% by volume of the water therein.23. The method of claim 15 wherein the foaming and stabilizing additive stabilizes the slurry at temperatures in the range of from about 50° F. to about 400° F.24. The method of claim 15 wherein the foaming and stabilizing additive is biodegradable.25. The method of claim 15 wherein the foamed cement slurry is placed in a subterranean formation.26. A method of cementing a subterranean zone penetrated by a well bore comprising the steps of:providing a foamed cement slurry comprising a hydraulic cement, water, a gas and a biodegradable foaming and stabilizing additive comprising a mixture of a capryl/capramido propyl betaine surfactant and a capryl/capramido propyl dimethyl amine oxide surfactant;placing the foamed cement slurry in the subterranean zone by way of the well bore; andallowing the foamed cement slurry to set.27. The method of claim 26 wherein the hydraulic cement in the slurry comprises at least one of the following: Portland cement, slag cement, silica cement, pozzolana cement or aluminous cement.28. The method of claim 26 wherein the water in the slurry comprises at least one of the following: fresh water, an unsaturated salt solutions or a saturated salt solutions.29. The method of claim 26 wherein the water in the slurry is present in an amount in the range of from about 35% to about 100% by weight of hydraulic cement therein.30. The method of claim 26 wherein the gas in the slurry comprises at least one of the following: air or nitrogen.31. The method of claim 26 wherein the gas in the slurry is present in an amount in the range of from about 10% to about 80% by volume of the cement slurry.32. The method of claim 26 wherein the biodegradable foaming and stabilizing additive in the slurry is a mixture of 95% by weight capryl/capramido propyl betaine surfactant and 5% by weight capryl/capramido propyl dimethyl amine oxide surfactant.33. The method of claim 26 wherein the biodegradable foaming and stabilizing additive in the slurry is present in an amount in the range of from about 0.8% to about 10% by volume of the water therein.34. The method of claim 26 wherein the biodegradable foaming and stabilizing additive stabilizes the slurry at temperatures in the range of from about 50° F. to about 400° F.

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이 특허에 인용된 특허 (46) 인용/피인용 타임라인 분석

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