Materials and methods of use as additives for oilwell cementing
The embodiments described herein generally relate to methods and chemical compositions for use with cementing processes. In one embodiment, a composition is provided comprising a random tetracopolymer having the formula styrene-butadiene-acrylic-fumaric acid, a polyvinyl acetate, and a nonionic surfactant.
1. A composition, comprising
a random tetracopolymer having the formula styrene-butadiene-acrylic-fumaric acid;
a polyvinyl acetate; and
a nonionic surfactant, wherein the random tetracopolymer has a molecular weight range of from about 10,000 to about 5,000,000 Dalton.
2. The composition of claim 1 , wherein the tetracopolymer comprises:
from about 25 to about 75 wt % of styrene monomer;
from about 10 to about 40 wt % of butadiene monomer;
from about 1 to about 10 wt % of acrylic acid monomer;
from about 1 to about 10 wt % of fumaric acid monomer, wherein the total amount of the monomers is 100%.
3. The composition of claim 1 , wherein the random tetracopolymer comprises a water insoluble compound in a powder form with a size distribution range from about 10 to about 500 microns.
4. The composition of claim 1 , wherein the random tetracopolymer and the polyvinyl acetate are present in the composition at a mass ratio from about 1:10 to about 10:1.
5. The composition of claim 1 , wherein the polyvinyl acetate has a molecular weight range of from about 10,000 to about 5,000,000 Dalton.
6. The composition of claim 1 , wherein the polyvinyl acetate comprises a water insoluble compound in a powder form with a size distribution range between about 10 to about 500 microns.
7. The composition of claim 1 , wherein the nonionic surfactant is disposed in a microporous carrier.
8. The composition of claim 7 , wherein the microporous carrier is a material selected from the kaolin, glutamate salt, calcium carbonate, and combinations thereof.
9. The composition of claim 7 , wherein the microporous carrier comprises a loading level from about 1 to about 25 wt. %.
10. The composition of claim 1 , wherein the nonionic surfactant comprises from about 0.1 to about 3.0 wt % of the composition.
11. The composition of claim 1 , wherein the composition is mixed with a cement slurry.
12. A process for using a composition, comprising:
providing the composition of claim 1 ; and
depositing the composition downhole of a wellbore.
13. The process of claim 12 , wherein the composition is mixed with a cement slurry prior to depositing the composition downhole of the wellbore.
14. The process of claim 12 , wherein the composition comprises a cement slurry foaming control, a cement slurry fluid loss control, a cement body gas migration control, or a combination thereof.