[특허]High temperature stable fluid loss control system

[미국특허] High temperature stable fluid loss control system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C09K-007/02
출원번호	US-0257091 (1981-04-24)
발명자 / 주소	Green Peter C. (Ellicott City MD) Block Jacob (Rockville MD)
출원인 / 주소	W. R. Grace & Co. (New York NY 02)
인용정보	피인용 횟수 : 17 인용 특허 : 2

초록 ▼

The present invention is directed to a high temperature stable composition capable of imparting a combination of pseudoplasticity and fluid loss control properties to aqueous systems. The composition is a combination of: (a) a solid, particulate silicate or alumino-silicate material; (b) a chemical compound capable of converting to a higher oxidation state under alkaline conditions; and (c) a reaction product of a polymeric substance selected from polyvinyl alcohol or hydroxyalkyl cellulose reacted with at least 1 percent of stoichiometry of a cross-linking agent selected from an epihalohydrin or an aldehyde containing or generating agent; wherein the amount of component (a) is at least 75 wt. percent of component (c) and component (b) is at least 25 wt. percent of component (c). The invention is further directed to improved drilling fluids containing said composition and to the process of drilling bore holes using said improved fluid.

대표청구항 ▼

A composition capable of imparting fluid loss control to aqueous systems comprising a mixture of: (a) a substantially water insoluble, solid, particulate silicate or alumino-silicate material which contains a major amount of kaolinite, halloysite, montmorillonite or illite or mixtures thereof, or attapulgite or sepiolite and being of a particle size such that at least about 90 percent by weight is capable of passing through a No. 20 U.S. Standard Sieve; in combination with (b) a chemical compound capable of converting to a higher oxidation state under alkaline conditions selected from the group consisting of C1-C5 alkanols, unsubstituted or C1-C3 alkyl, aryl or alkaryl substituted phenols, hydroquinone, tert-butyl catechol catechol, C1-C15 alkanethiol, alkali metal, alkaline earth metal or ammonium salt of sulfite, bisulfite and nitrite, ferrous metal salts of chloride and sulfate and cuprous metal salts of chloride and sulfate; in combination with (c) a reaction product formed between a polymeric material having a weight average molecular weight of at least about 20,000 selected from the group consisting of polyvinyl alcohol and hydroxy C1-C3 alkyl cellulose and at least from about 1 to 200 percent of stoichiometry of a cross-linking agent selected from the group consisting of a compound containing at least one aldehyde group therein or a compound capable of generating in situ at least one aldehyde or an epihalohydrin; the reaction between said polymeric material and said aldehyde carried out in an aqueous acidic medium having a pH of 5.5 or less and the reaction between said polymer and said epihalohydrin being carried out in an aqueous basic medium having a pH of at least about 9.5; wherein the weight ratio of component (a) to (c) is at least from about 0.75:1 to 3:1 and of component (b) to (c) is at least from about 0.2:1 to 1:1.

이 특허에 인용된 특허 (2) 인용/피인용 타임라인 분석

Watson Jimmie L. (Duncan OK) Carney Leroy L. (Duncan OK), Oxygen scavenging methods and additives.
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Rhudy John S. (Littleton CO) Gibb Connie L. (Evergreen CO), Recovery of petroleum with chemically treated high molecular weight polymers.
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이 특허를 인용한 특허 (17) 인용/피인용 타임라인 분석

Lee, A Reum; Kim, Sung Hoon; Choi, Nak Woon, Additive for skim coat mortar and skim coat mortar composition containing the same.
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Audebert Roland (Saint-Leu-La-Foret FRX) Janca Joseph (La Rochelle FRX) Maroy Pierre (Buc FRX) Hendriks Hugo (Grenoble FRX), Cement composition containing chemically crosslinked polyvinyl alcohol (PVA).
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McKinley Mark J. (Linwood MI) Sheridan Dan P. (Saginaw MI), Composite mixtures for improving gel strength of water absorbent gels.
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Dickert ; Jr. Joseph J. (Yardley PA) Heilweil Israel J. (Princeton NJ), Controlled release dispersant for clay-thickened, water-based drilling fluids.
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Xiang,Tao, Drilling fluid systems for reducing circulation losses.
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Sandiford Burton B. (Balboa Island CA) Zillmer Roger C. (Bloomington MN), Gel and process for preventing carbon dioxide break through.
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Sandiford Burton B. (Balboa Island CA) Zillmer Roger C. (Bloomington MN), Gel and process for preventing loss of circulation, and combination process for enhanced recovery.
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Marrocco Matthew L. (Santa Ana CA), Gel for retarding water flow.
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Marrocco Matthew L. (Santa Ana CA), Gel for retarding water flow.
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Marrocco Matthew L. (Santa Ana CA), Gel for retarding water flow.
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Green Peter C. (Ellicott City MD) Block Jacob (Rockville MD), High temperature stable fluid loss control system.
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Montgomery, John K.; Keller, Stuart R.; Krahel, Nancy M.; Smith, Martin V.; Williamson, Robert S., Managing lost returns in a wellbore.
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Walker Clarence O. (Richmond TX), Method for releasing stuck drill pipe.
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Xiang,Tao, Methods for reducing circulation loss during drilling operations.
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Sandiford Burton B. (Balboa Island CA) Chiou Chji-Shyoung (Tulsa OK), Prepartially crosslinked gel for retarding fluid flow.
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Sandiford Burton B. (Balboa Island CA) Zillmer Roger C. (Bloomington MN), Process for retarding fluid flow.
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Sawdon, Christopher Alan; Ballard, David Antony, Wellbore fluid.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] High temperature stable fluid loss control system 원문보기