Drag-reducing copolymer compositions
View Patent ↗A method of preparing and using a drag-reducing composition in a well treatment operation includes the step of preparing the drag-reducing composition by mixing a polymer emulsion that includes a first surfactant and a first solvent, with a second surfactant and a second solvent. The method continues with the step of combining the drag-reducing composition with an aqueous treatment fluid. The method further includes the step of injecting the drag-reducing composition and aqueous treatment fluid into a subterranean formation, a pipeline or a gathering line.
1. A method of preparing and using a drag-reducing composition, the method comprising the steps of:
preparing a polymer emulsion utilizing a first surfactant and a first solvent;
preparing a drag-reducing additive by mixing 40-85% by weight of the polymer emulsion with 10-35% by weight of a second surfactant with an HLB greater than 8 and 5-30% by weight of a second solvent;
forming a drag-reducing composition by combining the drag-reducing additive with an aqueous treatment fluid, wherein the aqueous treatment fluid is a fracturing fluid; and
injecting the drag-reducing composition into a subterranean formation, a pipeline or a gathering line.
2. The method of claim 1 , wherein the step of forming the drag-reducing composition with the treatment fluid comprises the step of adding the drag-reducing additive into the treatment fluid on-the-fly as the treatment fluid is pumped into the subterranean formation, pipeline or gathering line.
3. The method of claim 1 , wherein the step of forming the drag-reducing composition comprises adding the drag-reducing composition to the treatment fluid before the treatment fluid and drag-reducing composition are pumped into the subterranean formation, pipeline or gathering line.
4. The method of claim 1 , wherein the step of preparing the drag-reducing composition comprises mixing the polymer emulsion and second surfactant together before adding the second solvent.
5. The method of claim 1 , wherein the step of forming the drag-reducing composition comprises adding from about 0.01 gallons to 50 gallons of drag-reducing additive per 1,000 gallons of the aqueous treatment fluid.
6. A method of preparing and using a drag-reducing composition, the method comprising the steps of:
preparing the drag-reducing additive by mixing 40-85% by weight of a polymer emulsion with 10-35% by weight of a second surfactant and 5-30% by weight of a second solvent, wherein the polymer emulsion includes a first surfactant and a first solvent;
combining the drag-reducing additive with an aqueous treatment fluid to form a drag-reducing composition, wherein the aqueous treatment fluid is a fracturing fluid; and
injecting the drag-reducing composition into a subterranean formation, a pipeline or a gathering line.
7. The method of claim 6 , further comprising an initial step of preparing the polymer emulsion by combining the first surfactant and the first solvent with a polymer.
8. The method of claim 6 , wherein the step of combining the drag-reducing additive with the treatment fluid comprises the step of adding the drag-reducing additive into the treatment fluid on-the-fly as the treatment fluid is pumped into the subterranean formation, pipeline or gathering line.
9. The method of claim 8 , wherein the step of combining the drag-reducing additive with the treatment fluid comprises adding the drag-reducing additive to the treatment fluid before the treatment fluid and drag-reducing additive are pumped into the subterranean formation, pipeline or gathering line.
10. The method of claim 9 , wherein the step of preparing the drag-reducing additive comprises mixing the polymer emulsion and second surfactant together before adding the second solvent.
11. The method of claim 10 , wherein the step of combining the drag-reducing additive with an aqueous treatment fluid further comprises adding from about 0.01 gallons to 50 gallons of drag-reducing additive per 1,000 gallons of the aqueous treatment fluid.