CA2433589A1 - Thinners for invert emulsions - Google Patents

Thinners for invert emulsions Download PDF

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Publication number
CA2433589A1
CA2433589A1 CA002433589A CA2433589A CA2433589A1 CA 2433589 A1 CA2433589 A1 CA 2433589A1 CA 002433589 A CA002433589 A CA 002433589A CA 2433589 A CA2433589 A CA 2433589A CA 2433589 A1 CA2433589 A1 CA 2433589A1
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CA
Canada
Prior art keywords
fluid
carbon atoms
group
surfactant
formula
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Granted
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CA002433589A
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French (fr)
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CA2433589C (en
Inventor
Heinz Muller
Jeffrey P. Kirsner
Kimberly Burrows
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BASF Personal Care and Nutrition GmbH
Halliburton Energy Services Inc
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Individual
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Publication of CA2433589A1 publication Critical patent/CA2433589A1/en
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/02—Well-drilling compositions
    • C09K8/32—Non-aqueous well-drilling compositions, e.g. oil-based
    • C09K8/36—Water-in-oil emulsions

Abstract

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 of 2 to 21 carbon atoms.

Claims (21)

1. A method of influencing the rheology of a drilling fluid or well service fluid comprising an invert emulsion, said method comprising adding to said fluid at least one non-ionic surfactant, said surfactant being the reaction product of at least one oxide, selected from the group comprising 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.
2. The method of claim 1 wherein said non-ionic surfactant 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 said drilling fluid or well service fluid comprises a continuous oil phase that is flowable and pumpable at temperatures at least as low as about 40 degrees Fahrenheit.
4. The method of claim 1 wherein said drilling fluid or well service fluid comprises a continuous oil phase that is flowable and pumpable at temperatures above about 32 degrees Fahrenheit.
5. The method of claim 3 wherein said oil phase comprises compounds or compositions selected from the group comprising:
(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 5 wherein said oil phase comprises esters wherein the radical R' is an alkyl radical having about 5 to about 21 carbon atoms.
7. The method of claim 1 wherein said surfactant is added to said drilling fluid or well service fluid in an amount sufficient to effect a reduction in the viscosity of said emulsion.
8. The method of claim 1 wherein said surfactant is added to said drilling fluid or well service fluid in an amount sufficient to maintain the flowability and pumpability of said emulsion.
9. The method of claim 1 wherein said surfactant is added to said drilling fluid or well service fluid in quantities ranging from about 0.5 pounds to about 15.0 pounds of said compound per barrel of said emulsion.
10. The method of claim 1 further comprising adding to said drilling fluid or well service fluid a co-thinner compound 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.
11. The method of claim 10 wherein in said formula for said 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.
12. The method of claim 10 wherein in said formula for said 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.
13. The method of claim 10 wherein said surfactant and said co-thinner compound are added in proportions ranging from about 1:1 to about 10:1.
14. A drilling fluid or well service fluid, comprising a continuous oil phase, water dispersed in said oil phase, solids insoluble in said oil phase, and at least one non-ionic surfactant, said surfactant being the reaction product of ethylene oxide, propylene oxide and/or butylene oxide with C10-22 carboxylic acids or 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.
15. The drilling fluid or well service fluid of claim 14 wherein said surfactant is added in sufficient amounts to reduce the viscosity of said fluid.
16. The drilling fluid or well service fluid of claim 14 wherein said surfactant is added to said fluid in quantities ranging from about 0.5 pounds to about 15.0 pounds of said surfactant per barrel of said fluid.
17. The drilling fluid or well service fluid of claim 14 having a yield point of not more than about 75 lbs/100 ft2 at about 40°F.
18. The drilling fluid or well service fluid of claim 14 further comprising a compound 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.
19. The drilling fluid or well service fluid of claim 18 wherein said surfactant and said compound are in proportions ranging from about 1:1 to about 10:1.
20. The method of claim 1 wherein said surfactant is added to said drilling fluid or well service fluid during preparation of said fluid or after such fluid has begun service in the wellbore.
21. The method of claim 10 wherein said co-thinner compound is added to said fluid during preparation of said fluid or after said fluid has begun service in the wellbore.
CA2433589A 2000-12-29 2000-12-29 Thinners for invert emulsions Expired - Lifetime CA2433589C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2000/035610 WO2002053676A1 (en) 2000-12-29 2000-12-29 Thinners for invert emulsions

Publications (2)

Publication Number Publication Date
CA2433589A1 true CA2433589A1 (en) 2002-07-11
CA2433589C CA2433589C (en) 2011-03-08

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Family Applications (1)

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CA2433589A Expired - Lifetime CA2433589C (en) 2000-12-29 2000-12-29 Thinners for invert emulsions

Country Status (11)

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US (1) US7638466B2 (en)
EP (1) EP1346006B1 (en)
AR (1) AR052750A1 (en)
AU (1) AU2001226086B2 (en)
BR (1) BR0017398B1 (en)
CA (1) CA2433589C (en)
DK (1) DK1346006T3 (en)
MX (1) MXPA03005918A (en)
MY (1) MY159416A (en)
NO (1) NO20032920L (en)
WO (1) WO2002053676A1 (en)

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US7638466B2 (en) 2009-12-29
BR0017398B1 (en) 2010-11-30
EP1346006A1 (en) 2003-09-24
BR0017398A (en) 2004-04-27
AU2001226086B2 (en) 2007-06-28
DK1346006T3 (en) 2015-02-23
AR052750A1 (en) 2007-04-04
NO20032920D0 (en) 2003-06-25
MY159416A (en) 2017-01-13
WO2002053676A1 (en) 2002-07-11
CA2433589C (en) 2011-03-08
NO20032920L (en) 2003-08-21
US20040082483A1 (en) 2004-04-29
MXPA03005918A (en) 2005-02-14

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