IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0432786
(2000-12-29)
|
등록번호 |
US-7638466
(2010-01-07)
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국제출원번호 |
PCT/US00/035610
(2000-12-29)
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§371/§102 date |
20031210
(20031210)
|
국제공개번호 |
WO02/053676
(2002-07-11)
|
발명자
/ 주소 |
- Mueller, Heinz
- Kirsner, Jeff
- Burrows, Kimberly
|
출원인 / 주소 |
- Halliburton Energy Services, Inc.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
113 |
초록
▼
A method of reducing the viscosity of invert emulsions and oil-based drilling fluids and well service fluids comprising such emulsions over a broad temperature range is disclosed. The method comprises adding to said invert emulsions of the invention a non-ionic surfactant alone or in combination wit
A method of reducing the viscosity of invert emulsions and oil-based drilling fluids and well service fluids comprising such emulsions over a broad temperature range is disclosed. The method comprises adding to said invert emulsions of the invention a non-ionic surfactant alone or in combination with a co-thinner having the formula: R""--(C2H4O)n(C3H6O)m (C4H8O)k--H where R"" is a saturated or unsaturated, linear or branched, alkyl radical having about 8 to about 24 carbon atoms, n is a number ranging from about 1 to about 10, m is a number ranging from about 0 to about 10, and k is a number ranging from about 0 to about 10. The non-ionic surfactant is a reaction product of ethylene oxide, propylene oxide and/or butylene oxide with C10-22 carboxylic acids or C10-22 carboxylic acid derivatives containing at least in position 9/10 and/or 13/14 structural units of general formula (I) where R1 is a hydrogen atom or an OH group or a group OR2. R2 is an alkyl group of about 1 to about 18 carbon atoms, an alkenyl group of about 2 to about 18 carbons atoms, or a group of the formula (II): R3 is a hydrogen atom, an alkyl group of about 1 to about 21 carbon atoms or an alkylene group or 2 to 21 carbon atoms.
대표청구항
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What is claimed is: 1. A method of drilling a borehole in a subterranean formation at a temperature in the range of about 40° F. to about 250° F., comprising: providing or using in the drilling an invert emulsion drilling fluid comprising a continuous oil phase and having a plastic viscosity in the
What is claimed is: 1. A method of drilling a borehole in a subterranean formation at a temperature in the range of about 40° F. to about 250° F., comprising: providing or using in the drilling an invert emulsion drilling fluid comprising a continuous oil phase and having a plastic viscosity in the range of about 10 cP to about 60 cP and a yield point in the range of about 5 lb/100 ft2 to about 40 lb/100 ft2 when measured at about 122° F. (50° C.) and a yield point in the range of about 5 lb/100 ft2 to about 75 lb/100 ft2 when measured at about 40° F. (4° C.); and adding to the drilling fluid before or during the drilling at least one non-ionic surfactant thinner, wherein the surfactant is the reaction product of at least one oxide, selected from the group consisting of ethylene oxide, propylene oxide and butylene oxide, with C10-22 carboxylic acids or C10-22 carboxylic acid derivatives containing at least one double bond in position 9, 10, 13, or 14 having structural units of the general formula (I): where R1 is a hydrogen atom, or an OH group, or a group OR2, and where R2 is an alkyl group of about 1 to about 18 carbon atoms, or an alkenyl group of about 2 to about 18 carbon atoms, or a group of the formula (II): and where R3 is a hydrogen atom, or an alkyl group of about 1 to about 21 carbon atoms, or an alkylene group of about 2 to about 21 carbon atoms; such that the drilling fluid maintains during the drilling a plastic viscosity in the range of about 10 cP to about 60 cP and a yield point in the range of about 5 lb/100 ft2 to about 40 lb/100 ft2 when measured at about 122° F. (50° C.) and a yield point in the range of about 5 lb/100 ft2 to about 75 lb/100 ft2 when measured at about 40° F. (4° C.). 2. The method of claim 1 wherein the surfactant thinner comprises alkylation products obtained by reacting C12-22 carboxylic mono-, di-or triglycerides containing structural units of the formula (I) in at least one position 9, 10, 13, or 14 with at least one oxide of the group comprising ethylene oxide, propylene oxide, and butylene oxide. 3. The method of claim 1 wherein the surfactant thinner thins the drilling fluid so that the continuous oil phase of the fluid is flowable and pumpable at temperatures at least as low as about 40° F. (40° C.). 4. The method of claim 1 wherein the surfactant thinner thins the drilling fluid so that the continuous oil phase of the fluid is flowable and pumpable at temperatures at least as low as about 32° F. (0° C.). 5. The method of claim 1 wherein the continuous oil phase comprises compounds or compositions selected from the group consisting of: (a) carboxylic esters of the formula: R'--COO--R" where R' is a saturated or unsaturated, linear or branched, alkyl radical having about 1 to about 23 carbon atoms and R" is an alkyl radical, branched or unbranched, saturated or unsaturated, having about 1 to about 23 carbon atoms; (b) linear or branched olefins having about 8 to about 30 carbon atoms; (c) water-insoluble symmetric or asymmetric ethers of monohydric alcohols of natural or synthetic origin, said alcohols containing about 1 to about 24 carbon atoms; (d) water-insoluble alcohols of the formula: R'"--OH where R'" is a saturated, unsaturated, linear or branched alkyl radical having about 8 to about 24 carbon atoms; and (e) carbonic diesters. 6. The method of claim 1 wherein the drilling fluid further comprises drilling fluid water dispersed in the oil phase and solids insoluble in the oil phase. 7. The method of claim 1 further comprising adding to the drilling fluid before or during the drilling a co-thinner compound having the formula: R--(C2H4O)n(C3H6 O)m(C4H8O)k--H where R is a saturated or unsaturated, linear or branched alkyl radical having about 8 to about 24 carbon atoms, n is a number ranging from about 1 to about 10, m is a number ranging from about 0 to about 10, and k is a number ranging from about 0 to about 10. 8. The method of claim 7 wherein in the formula for the co-thinner compound, k is zero and m is a number ranging from about 1 to about 10, or m is zero and k is a number ranging from about 1 to about 10. 9. The method of claim 7 wherein in the formula for the co-thinner compound, n is a number ranging from about 1 to about 6, m is a number ranging from about 1 to about 6, and k is zero. 10. The method of claim 7 wherein the surfactant thinner and the co-thinner compound are added to the drilling fluid in proportions ranging from about 1:1 to about 10:1. 11. The method of claim 10 wherein the surfactant thinner is added to the drilling fluid during preparation of the fluid and the co-thinner is added to the drilling fluid during drilling. 12. The method of claim 10 wherein the surfactant thinner and the co-thinner are both added to the drilling fluid during preparation of the fluid. 13. The method of claim 10 wherein the surfactant thinner and the co-thinner are both added to the drilling fluid during drilling. 14. The method of claim 1 wherein the surfactant thinner is added to the drilling fluid in quantities ranging from about 0.5 pounds to about 15.0 pounds per barrel of the drilling fluid. 15. The method of claim 1 wherein the surfactant thinner is added to the drilling fluid during drilling in sufficient amounts to reduce the viscosity of the fluid during drilling such that the plastic viscosity of the fluid is maintained during drilling in the range of about 10 cP to about 60 cP, the yield point of the fluid is maintained during drilling in the range of about 5 lb/100 ft2 to about 40 lb/100 ft2 when measured at about 122° F. (50° C.), and the yield point of the fluid is maintained during drilling in the range of about 5 lb/100 ft2 to about 75 lb/100 ft2 when measured at about 40° F. (4° C.). 16. A drilling fluid comprising: a continuous oil phase; water dispersed in the oil phase; solids insoluble in the oil phase; and at least one non-ionic surfactant thinner, wherein the non-ionic surfactant thinner is the reaction product of ethylene oxide, propylene oxide and/or butylene oxide with C10-22 carboxylic acids or C10-22 carboxylic acid derivatives containing at least one double bond in position 9, 10, 13, or 14 having structural units of the general formula (I): where R1 is a hydrogen atom, or an OH group, or a group OR2, and where R2 is an alkyl group of about 1 to about 18 carbon atoms, or an alkenyl group of about 2 to about 18 carbon atoms, or a group of the formula (II): where R3 is a hydrogen atom, or an alkyl group of about 1 to about 21 carbon atoms, or an alkylene group of about 2 to about 21 carbon atoms; and wherein the surfactant thinner is added to the fluid in quantities ranging from about 0.5 pounds to about 15.0 pounds of surfactant per barrel of fluid, such that the fluid has a plastic viscosity in the range of about 10 cP to about 60 cP and a yield point in the range of about 5 lb/100 ft2 to about 40 lb/100 ft2 when measured at about 122° F. (50° C.), and a yield point in the range of about 5 lb/100 ft2 to about 75 lb/100 ft2 when measured at about 40° F. (4° C.). 17. The drilling fluid of claim 16 wherein the continuous oil phase comprises compounds or compositions selected from the group consisting of: (a) carboxylic esters of the formula: R'--COO--R" where R' is a saturated or unsaturated, linear or branched, alkyl radical having about 1 to about 23 carbon atoms and R" is an alkyl radical, branched or unbranched, saturated or unsaturated, having about 1 to about 23 carbon atoms; (b) linear or branched olefins having about 8 to about 30 carbon atoms; (c) water-insoluble symmetric or asymmetric ethers of monohydric alcohols of natural or synthetic origin, said alcohols containing about 1 to about 24 carbon atoms; (d) water-insoluble alcohols of the formula: R'"--OH where R'" is a saturated, unsaturated, linear or branched alkyl radical having about 8 to about 24 carbon atoms; and (e) carbonic diesters. 18. The drilling fluid of claim 17 wherein one or more compounds or compositions from said group comprise about 50% to about 100% of the oil phase by volume. 19. The drilling fluid of claim 16 wherein the drilling fluid comprises about 15% to about 35% by volume water and about 75% to about 65% by volume oil. 20. The drilling fluid of claim 16 wherein the quantity of surfactant thinner in the drilling fluid ranges from about 1.5 lbs/barrel to about 3 lbs/barrel. 21. The drilling fluid of claim 16 further comprising a co-thinner compound having the formula: R--(C2H4O)n(C3H6 O)m(C4H8O)k--H where R is a saturated or unsaturated, linear or branched alkyl radical having about 8 to about 24 carbon atoms, n is a number ranging from about 1 to about 10, m is a number ranging from about 0 to about 10, and k is a number ranging from about 0 to about 10, and wherein the surfactant thinner and the co-thinner compound are present in the drilling fluid in a ratio ranging from about 1:1 to about 10:1.
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