Dissolvable diversion package and method of use
Methods and systems for diverting the flow of fluids within a wellbore are disclosed. The methods and systems use a flow conveyed diverter pack, which includes a package portion and a wing portion. The package portion may contain a ball (a.k.a. a diverter ball) and may contain additional components. The diverter pack may be formed by sandwiching a diverter ball between films of a flexible material, for example, films of a dissolvable polymer. The diverter pack may be deployed in a wellbore, whereby the pack is conveyed by fluid flow to an opening to be sealed. The diverter pack seats upon the opening, thereby diverting flow from the opening.
1. A method of making a diverter pack for plugging an opening in a subterranean well, the method comprising:
sandwiching a diverter ball element between a first film and a second film, and
bonding the first and second films together to form a cavity portion containing the diverter ball element and a wing portion comprising the boded first and second films.
2. The method of claim 1 , wherein the first and second films comprises a first dissolvable material.
3. The method of claim 1 , wherein the ball element comprises a second dissolvable material that is the same or different from the first dissolvable material.
4. A diverter pack for plugging an opening in a subterranean well, the diverter pack comprising:
a first film, a second film, and a diverter ball element,
wherein the diverter ball element is disposed between the first and second films,
wherein the first and second films are bonded together to form a cavity portion containing the diverter ball element and a wing portion comprising the bonded first and second films, and
wherein the diverter pack is made by sandwiching the diverter ball element between the first and second films, and bonding the first and second films together to form the cavity portion and the wing portion.
5. The diverter pack of claim 4 , wherein the first and second films comprises a first dissolvable material.
6. The diverter pack of claim 5 , wherein the first dissolvable material comprises a first polyvinyl alcohol (PVA) compound.
7. The diverter pack of claim 6 , wherein the first PVA compound comprises PVA and one or more of a styrene-rubber polymer additive, a chemical foaming agent, a plasticizer, or a polycaprolactam.
8. The diverter pack of claim 4 , wherein the ball element comprises a second dissolvable material that is the same or different from the first dissolvable material.
9. The diverter pack of claim 8 , wherein the second dissolvable material is a PVA compound.
10. A diverter pack for plugging an opening in a subterranean well, the diverter pack comprising:
a first film, a second film, and a diverter ball element,
wherein the diverter ball element is disposed between the first and second films,
wherein the first and second films are bonded together to form a cavity portion containing the diverter ball element and a wing portion comprising the bonded first and second films, and
wherein the cavity portion further contains at least one component in addition to the diverter ball element, wherein the at least one component is selected from the group consisting of a gel, powder, flakes, pellets, and combinations thereof.
11. The diverter pack of claim 10 , wherein the first film and second film are bonded together in the wing portion and not bonded together in the cavity portion.
12. The diverter pack of claim 10 , wherein the first and second films comprises a first dissolvable material.
13. The diverter pack of claim 12 , wherein the first dissolvable material comprises a first polyvinyl alcohol (PVA) compound.
14. The diverter pack of claim 13 , wherein the first PVA compound comprises PVA and one or more of a styrene-rubber polymer additive, a chemical foaming agent, a plasticizer, or a polycaprolactam.
15. The diverter pack of claim 12 , wherein the ball element comprises a second dissolvable material that is the same or different from the first dissolvable material.
16. The diverter pack of claim 15 , wherein the second dissolvable material is a PVA compound.
17. The diverter pack of claim 10 , wherein the diverter ball element is spherical.
18. The diverter pack of claim 10 , wherein the diverter ball element is ovoid (egg-shaped).
19. The diverter pack of claim 10 , wherein the gel comprises PVA.
20. The diverter pack of claim 10 , wherein the at least one component in addition to the diverter ball element comprises one or more of polylactic acid or poly(glycolic acid).