DRAG-REDUCING ADDITIVES HAVING DISPERSION POLYMERS AND MICROEMULSIONS AND METHODS FOR PREPARING AND USING SAME
A drag-reducing additive comprises a dispersion polymer and a microemulsion. The dispersion polymer comprises a polymer and a saline solution, and the microemulsion comprises a solvent, a surfactant and an aqueous phase. The drag-reducing additive can be combined with an aqueous treatment fluid to form a drag-reducing composition. A method of using a drag-reducing composition, wherein the method comprises providing a drag-reducing additive comprising a dispersion polymer and microemulsion, forming the drag-reducing composition by combining the drag-reducing additive with an aqueous treatment fluid, and injecting the drag-reducing composition into a subterranean formation, a pipeline or a gathering line.
1 . A drag-reducing additive comprising:
a dispersion polymer; and
a microemulsion.
2 . The drag-reducing additive of claim 1 , wherein the dispersion polymer comprises:
a polymer; and
a saline solution.
3 . The drag-reducing additive of claim 1 , wherein the dispersion polymer is selected from the group consisting of amphoteric dispersion polymers, zwitterionic dispersion polymers, anionic dispersion polymers, and cationic dispersion polymers.
4 . The drag-reducing additive of claim 1 , wherein the microemulsion comprises:
a solvent;
a surfactant; and
an aqueous phase.
5 . The drag-reducing additive of claim 4 , wherein the solvent is a terpene solvent.
6 . The drag-reducing additive of claim 4 , wherein the surfactant is an alkylpolyglucoside surfactant.
7 . The drag-reducing additive of claim 4 , wherein the surfactant is an ethoxylated alcohol surfactant.
8 . The drag-reducing additive of claim 1 , wherein the dispersion polymer is present from about 70 wt % to about 99 wt % of the total weight of the drag-reducing additive.
9 . The drag-reducing additive of claim 1 , wherein the microemulsion is present from about 0.5 wt % to about 30 wt % of the total weight of the drag-reducing additive.
10 . A drag-reducing composition comprising:
a drag-reducing additive, wherein the drag-reducing additive comprises:
a dispersion polymer; and
a microemulsion; and
an aqueous treatment fluid.
11 . The drag-reducing composition of claim 10 , wherein the drag-reducing composition comprises about 0.01 gallons to about 50 gallons of the drag-reducing additive per 1,000 gallons of the aqueous treatment fluid.
12 . A method of using a drag-reducing composition comprising the steps of:
providing a drag-reducing additive comprising a dispersion polymer and a microemulsion;
forming the drag-reducing composition by combining the drag-reducing additive with an aqueous treatment fluid; and
injecting the drag-reducing composition into a subterranean formation, a pipeline or a gathering line.
13 . The method of claim 12 , wherein the step of forming the drag-reducing composition with the aqueous treatment fluid further comprises the step of adding the drag-reducing additive into the aqueous treatment fluid on-the-fly as the aqueous treatment fluid is injected into the subterranean formation, the pipeline or the gathering line.
14 . The method of claim 12 , wherein the step of forming the drag-reducing composition further comprises the step of adding the drag-reducing additive to the aqueous treatment fluid before the drag-reducing composition is injected into the subterranean formation, the pipeline or the gathering line.
15 . The method of claim 12 , wherein the step of forming the drag-reducing composition further comprises adding from about 0.01 gallons to about 50 gallons of the drag-reducing additive per 1,000 gallons of the aqueous treatment fluid.
16 . The method of claim 12 , wherein the dispersion polymer is an amphoteric dispersion polymer.
17 . The method of claim 12 , wherein the dispersion polymer is an anionic dispersion polymer.
18 . The method of claim 12 , wherein the dispersion polymer is a cationic dispersion polymer.
19 . The method of claim 12 , wherein the dispersion polymer is a zwitterionic dispersion polymer.
20 . The method of claim 12 , wherein the dispersion polymer is present from about 70 wt % to about 99 wt % of the total weight of the drag-reducing additive.
21 . The method of claim 12 , wherein the microemulsion is present from about 0.5 wt % to about 30 wt % of the total weight of the drag-reducing additive.
22 . The method of claim 12 , wherein the microemulsions comprises a solvent, a surfactant, and an aqueous phase.
23 . The method of claim 22 , wherein the solvent is a terpene solvent.
24 . The method of claim 22 , wherein the surfactant is an alkylpolyglucoside surfactant.
25 . The method of claim 22 , wherein the surfactant is an ethoxylated alcohol surfactant.