Wellbore fluid comprising sulfonated copolymers with pendant...

Details Wellbore fluid comprising sulfonated copolymers with pendant... Wellbore fluid comprising sulfonated copolymers with pendant...

2011-04-05

2011-04-05

Kugel, Timothy J. (Department: 1765)

Earth boring, well treating, and oil field chemistry

Earth boring

Contains organic component

C166S305100, C175S065000, C507S118000, C507S119000, C507S120000, C507S219000, C507S221000, C507S224000, C507S225000

Reexamination Certificate

active

07919437

ABSTRACT:
Wellbore fluid having a continuous aqueous phase, and comprising at least one polymer which has a number average molecular weight in the range of from 10,000 to less than 100,000, wherein the polymer is selected from a copolymer of at least one hydrophilic monomer and at least one hydrophobic monomer containing an alkyl group having at least 8 carbon atoms. The hydrophilic monomer is selected from acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid and itaconic acid, and sulfonate groups have been introduced into the copolymer by reaction of at least a portion of the carboxylic acid and/or anhydride groups with a compound of general formula R12N(CH2)nSO3X (I) or a compound of general formula HO(CH2)nSO3X (II). Each R1is independently selected from hydrogen, methyl or ethyl, X is either H or a Group IA metal, and n is an integer of from 1 to 6. The combined molecular weight of the pendant alkyl groups that are introduced into the copolymer by the hydrophobic monomer is in the range of from 15 to 70% by weight based on the molecular weight of the polymer such that the polymer has a solubility of at least 2% in water at 20° C. The fluid further comprises at least one additive selected from additional fluid loss control agents, bridging particulate materials, finely dispersed additives for increasing the fluid density, thinners, and shale inhibitors.

REFERENCES:
patent: 2826548 (1958-03-01), Busch
patent: 2847403 (1958-08-01), Contois
patent: 2938016 (1960-05-01), Johnson
patent: 2948678 (1960-08-01), Turner et al.
patent: 2948768 (1960-08-01), Ruben
patent: 2979454 (1961-04-01), Fields et al.
patent: 3222278 (1965-12-01), Harryman et al.
patent: 3472769 (1969-10-01), Lummus et al.
patent: 3816308 (1974-06-01), Le Blanc
patent: 3838047 (1974-09-01), Le Blanc
patent: 3896031 (1975-07-01), Carney
patent: 4008766 (1977-02-01), Savins
patent: 4008768 (1977-02-01), Birk
patent: 4143007 (1979-03-01), DeMartino
patent: 4306980 (1981-12-01), Brandt et al.
patent: 4317893 (1982-03-01), Chen et al.
patent: 4505827 (1985-03-01), Rose et al.
patent: 4507827 (1985-04-01), Staehli
patent: 4518510 (1985-05-01), Gleason et al.
patent: 4532052 (1985-07-01), Weaver et al.
patent: 4551256 (1985-11-01), Kita et al.
patent: 4566978 (1986-01-01), Strong et al.
patent: 4581147 (1986-04-01), Branch, III
patent: 4602067 (1986-07-01), Strong et al.
patent: 4652623 (1987-03-01), Chen et al.
patent: 4703801 (1987-11-01), Fry et al.
patent: 4726906 (1988-02-01), Chen et al.
patent: 4740318 (1988-04-01), Hale et al.
patent: 4812544 (1989-03-01), Sopko et al.
patent: 4829121 (1989-05-01), Fong et al.
patent: 4861499 (1989-08-01), Neff et al.
patent: 4976315 (1990-12-01), Prukop et al.
patent: 5039433 (1991-08-01), Sopko et al.
patent: 5096603 (1992-03-01), Peiffer
patent: 5166275 (1992-11-01), Enomoto et al.
patent: 5191049 (1993-03-01), Enomoto et al.
patent: 5210163 (1993-05-01), Grey
patent: 5221489 (1993-06-01), Bloys et al.
patent: 5229449 (1993-07-01), Enomoto et al.
patent: 5283235 (1994-02-01), Bush et al.
patent: 5287929 (1994-02-01), Bloys et al.
patent: 5292367 (1994-03-01), Bloys et al.
patent: 5294693 (1994-03-01), Egraz et al.
patent: 5360787 (1994-11-01), Bloys et al.
patent: 5391359 (1995-02-01), Patel
patent: 5728653 (1998-03-01), Audibert et al.
patent: 5759962 (1998-06-01), Audibert et al.
patent: 6770604 (2004-08-01), Reddy et al.
patent: 6822039 (2004-11-01), Monfreux-Gaillard et al.
patent: 2003/0114317 (2003-06-01), Benton et al.
patent: 2004/0220058 (2004-11-01), Eoff et al.
patent: 2004/0244978 (2004-12-01), Shaarpour
patent: 2005/0155796 (2005-07-01), Eoff et al.
patent: 2005/0215438 (2005-09-01), Prud'Homme et al.
patent: 2005/0284632 (2005-12-01), Dalrymple et al.
patent: 2 001 377 (1979-01-01), None
patent: 2 340 521 (2000-02-01), None
patent: WO 91/16365 (1981-10-01), None
patent: WO 87/02692 (1987-05-01), None
patent: WO 98/23843 (1998-06-01), None
patent: WO 00/22009 (2000-04-01), None
patent: WO 03/012004 (2003-02-01), None
patent: WO 03/052024 (2003-06-01), None
patent: WO 03/056130 (2003-07-01), None
patent: WO 2005/105949 (2005-11-01), None
Chevron Phillips Chemical Company LLC: “Polyanhydride Resins”, Internet Article, [Online], (2005), 4 pages.
International Search Report for PCT/GB2007/002323mailed Oct. 5, 2007.
Written Opinion of the International Searching Authority for PCT/GB2007/002323mailed Oct. 5, 2007.

Affiliated with

Also associated with

Rating

Wellbore fluid comprising sulfonated copolymers with pendant... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Wellbore fluid comprising sulfonated copolymers with pendant..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wellbore fluid comprising sulfonated copolymers with pendant... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2711161