Friction reducer compositions
View Patent ↗A composition for treating an aqueous fluid includes an ionic polyacrylamide and a silicon polyether. The composition can be an oil-in-water emulsion or a water-in-oil emulsion. The ionic polyacrylamide can be an anionic polyacrylamide or a cationic polyacrylamide. The composition can be employed, for example, as a friction reducing additive for water based fracturing fluid, or a drilling mud additive.
1. A friction reducer composition for water based liquids comprising:
a) an ionic polyacrylamide; and
b) a silicon polyether;
wherein the silicon polyether is selected from the group consisting of
1) silicone polyether(s) defined by the formula:
Me 3 Si—O—SiMe(R)—O—SiMe 3 ,
wherein
R=(C 3 H 6 )O(C 2 H 4 O) a (C 3 H 6 O) b (C 4 H 8 O) c Z;
a=4-17;
b=0-26;
c=0-26 and
Z is H, acetyl or a monovalent hydrocarbon group containing from 1 to 12 carbon atoms;
2) silicone polyether(s) defined by the formula:
Me 3 Si—[OSiMe 2 ] x —[O—SiMe(R)] y —O—SiMe 3 ,
wherein
x=0-74;
y=1-10;
R=(C 3 H 6 )O(C 2 H 4 O) a (C 3 H 6 O) b (C 4 H 8 O) c Z;
a=5-17;
b=0-26;
c=0-26 and
Z is H, acetyl or a monovalent hydrocarbon group containing from 1 to 12 carbon atoms;
3) silicone polyether(s) defined by the formula:
{[CH 2 CH(OH)CH 2 O(CH 2 ) 3 SiMe 2 —O—[SiMe 2 O] x —SiMe 2 —(CH 2 ) 3 OCH 2 CH(OH)][(H)NCH—(CH 3 )—CH 2 O(C 3 H 6 O) b (C 2 H 4 O) a CH 2 CH(CH 3 )N(H)]}
wherein
x=4-100;
a=5-50 and
b=3-20;
4) silicon polyether(s) defined by the formula
H—[N(H)(R 1 )R 2 Si(OR 3 ) 3-a-b-c (OR 4 ) a (R 5 Si(OR 6 ) d (R 7 ) e ) b R 8 c ]—N(H)(R 1 )R 2 Si(OR 3 ) 3 ,
wherein
R 1 =monovalent hydrocarbon radical containing 1-20 carbon atoms;
R 2 =divalent linear or branched hydrocarbon radical containing 1-60 carbon atoms;
R 4 =hydrocarbon radical containing 3-200 carbon atoms;
R 5 =selected from a group consisting of oxygen or a divalent linear or branched hydrocarbon radical containing 1-60 carbon atoms;
R 3 , R 6 , R 7 and R 8 =monovalent linear or branched hydrocarbon radical containing 1-200 carbon atoms;
a, b, c=0-3; subject to the limitation that a+b+c≦3 and
d, e=0-3; subject to the limitation that d+e≦3;
and
5) silicon polyether(s) defined by the formula:
Me 3 Si(C 2 H 4 )SiMe 2 (C 3 H 6 O)(C 2 H 4 O) x Z,
wherein
x=3-17 and
Z is H, acetyl or a monovalent hydrocarbon group containing from 1 to 12 carbon atoms.
2. The composition of claim 1 wherein said composition is an emulsion.
3. The composition of claim 2 wherein said emulsion is an oil-in-water emulsion.
4. The composition of claim 2 wherein said emulsion is a water-in-oil emulsion.
5. The composition of claim 1 wherein the composition is solid.
6. The composition of claim 1 wherein said polyacrylamide is an anionic polyacrylamide.
7. The composition of claim 1 wherein said polyacrylamide is a cationic polyacrylamide.
8. The composition of claim 1 wherein said component “b” is 1% to 9% of the composition.
9. A friction reduction method for treating an aqueous fluid comprising:
combining an ionic polyacrylamide and a silicon polyether with said aqueous fluid;
wherein said silicon polyether is selected from the group consisting of
1) silicone polyether(s) defined by the formula:
Me 3 Si—O—SiMe(R)—O—SiMe 3 ,
wherein
R=(C 3 H 6 )O(C 2 H 4 O) a (C 3 H 6 O) b (C 4 H 8 O) c Z;
a=4-17;
b=0-26;
c=0-26 and
Z is H, acetyl or a monovalent hydrocarbon group containing from 1 to 12 carbon atoms;
2) silicone polyether(s) defined by the formula:
Me 3 Si—[OSiMe 2 ] x —[O—SiMe(R)] y —O—SiMe 3 ,
wherein
x=0-74;
y=1-10;
R=(C 3 H 6 )O(C 2 H 4 O) a (C 3 H 6 O) b (C 4 H 8 O) c Z;
a=5-17;
b=0-26;
c=0-26 and
Z is H, acetyl or a monovalent hydrocarbon group containing from 1 to 12 carbon atoms;
3) silicone polyether(s) defined by the formula:
{[CH 2 CH(OH)CH 2 O(CH 2 ) 3 SiMe 2 —O—[SiMe 2 O] x —SiMe 2 —(CH 2 ) 3 OCH 2 CH(OH)][(H)NCH—(CH 3 )—CH 2 O(C 3 H 6 O) b (C 2 H 4 O) a CH 2 CH(CH 3 )N(H)]}
x=4-100;
a=5-50 and
b=3-20;
4) silicone polyether(s) defined by the formula:
H—[N(H)(R 1 )R 2 Si(OR 3 ) 3-a-b-c (OR 4 ) a (R 5 Si(OR 6 ) d (R 7 ) e ) b R 8 c ]—N(H)(R 1 )R 2 Si(OR 3 ) 3 ,
wherein
R 1 =monovalent hydrocarbon radical containing 1-20 carbon atoms;
R 2 =divalent linear or branched hydrocarbon radical containing 1-60 carbon atoms;
R 4 =hydrocarbon radical containing 3-200 carbon atoms;
R 5 =selected from a group consisting of oxygen or a divalent linear or branched hydrocarbon radical containing 1-60 carbon atoms;
R 3 , R 6 , R 7 and R 8 =monovalent linear or branched hydrocarbon radical containing 1-200 carbon atoms;
a, b, c=0-3; subject to the limitation that a+b+c≦3 and
d, e=0-3; subject to the limitation that d+e≦3;
and
5) silicon polyether(s) defined by the formula:
Me 3 Si(C 2 H 4 )SiMe 2 (C 3 H 6 O)(C 2 H 4 O) x Z,
x=3-17 and
Z is H, acetyl or a monovalent hydrocarbon group containing from 1 to 12 carbon atoms.
10. The method of claim 9 wherein the ionic polyacrylamide is in an emulsion.
11. The method of claim 9 wherein the ionic polyacrylamide is a solid.
12. The method of claim 9 wherein the aqueous fluid is brine.
13. The method of claim 12 wherein the brine contains up to about 15% NaCl and 5% CaCl 2 .
14. The method of claim 12 wherein the aqueous fluid contains KCl and/or polyDADMAC and the ionic polyacrylamide is a cationic polyacrylamide.
15. The method of claim 9 wherein the aqueous fluid is a water based hydraulic fracturing fluid and the method further includes injecting said hydraulic fracturing fluid into a rock formation containing crude oil and/or natural gas.
16. The method of claim 15 wherein the friction reducer composition can be added to water and/or brine at a dosage rate of from 0.25 to 5 gallons of friction reducer composition to 1,000 gallons of water or brine.
17. The method of claim 9 wherein the treated aqueous fluid is combined with a drilling mud and the method include pumping said drilling mud into a well bore during a drilling operation.