Downhole Chemical Delivery For Oil And Gas Wells

• US 20130196884A1
• Filed: 02/01/2012
• Published: 08/01/2013
• Est. Priority Date: 02/01/2012
• Status: Abandoned Application

• Current Assignee: Trican Well Service Limited
• Original Assignee: Trican Well Service Limited
• Inventors: Venditto, James Joseph, Zamora, Frank, Thompson, Joseph E., Kakadjian, Sarkis, Powell, Ronald Joseph
• Application Number:
  US13/364,156
• Publication Number:
  US 20130196884A1
• Time in Patent Office: Days
• US Class Current: 507/203
• CPC Class Codes: C09K 2208/28 Friction or drag reducing additives
• CPC Class Codes: C09K 8/68 containing organic compounds
• CPC Class Codes: C09K 8/805 Coated proppants

Abstract

A method of reducing the cost and environmental impact of chemicals used in hydraulic fracturing is to use a proppant that is coated with at least two chemicals, where each of those chemicals are useful in treating a well. By coating at least two chemicals onto the proppant the amounts of chemicals required to treat a well are reduced by delivering the chemicals to only the areas that require treatment. Additionally mixing issues are avoided as only a single proppant or substrate is used in the well.

Claims

1. A well treatment material comprising:

a substrate having two or more coatings without an intervening adhesive layer between the substrate and the first coating ;

wherein the substrate is suspended in a fluid, and wherein each coating is a material useful for treating a well.

2. The well treatment material of claim 1 wherein the substrate is a proppant.

3. The well treatment material of claim 2 wherein the proppant is a sand.

4. The well treatment material of claim 2 wherein the proppant is a natural occurring organic material.

5. The well treatment material of claim 2 wherein the proppant is a synthetic material.

6. The well treatment material of claim 1 wherein the materials useful for treating a wellbore are a friction reducer, a gelling agent, a clay control agent, a biocide, a scale inhibitor, a chelating agent, a gel-breaker, an oxygen scavenger, an antifoamer, a crosslinker, a wax inhibitor, a corrosion inhibitor, a de-emulsifier, a foaming agent, or a tracer.

7. The well treatment material of claim 1 wherein one of the materials useful for treating a wellbore is a friction reducer.

8. The well treatment material of claim 1 wherein one of the materials useful for treating a wellbore is a gelling agent.

9. The well treatment material of claim 1 wherein one of the materials useful for treating a wellbore is a clay control agent.

10. The well treatment material of claim 1 wherein one of the materials useful for treating a wellbore is a biocide.

11. The well treatment material of claim 1 wherein one of the materials useful for treating a wellbore is a scale inhibitor.

12. The well treatment material of claim 1 wherein one of the materials useful for treating a wellbore is a chelating agent.

13. The well treatment material of claim 1 wherein one of the materials useful for treating a wellbore is a gel-breaker.

14. The well treatment material of claim 1 wherein one of the materials useful for treating a wellbore is an antifoamer.

15. The well treatment material of claim 1 wherein one of the materials useful for treating a wellbore is a crosslinker.

16. The well treatment material of claim 1 wherein one of the materials useful for treating a wellbore is a wax inhibitor.

17. The well treatment material of claim 1 wherein one of the materials useful for treating a wellbore is a corrosion inhibitor.

18. The well treatment material of claim 1 wherein one of the materials useful for treating a wellbore is a de-emulsifier.

19. The well treatment material of claim 1 wherein one of the materials useful for treating a wellbore is a foaming agent.

20. The well treatment material of claim 1 wherein one of the materials useful for treating a wellbore is a tracer.

21. A method of making a well treatment material, comprising:

coating a substrate with a first coating comprising a first well treating agent and a second coating comprising a second well treating agent without an intervening adhesive layer between the substrate and the first coating.

22. The method of making a well treatment material of claim 21 wherein the substrate is suspended in a fluid.

23. The method of making a well treatment material of claim 21 wherein additional layers of a additional well treating agent are coated onto the substrate.

24. The method of making a well treatment material of claim 21 wherein the substrate is a proppant.

25. The method of making a well treatment material of claim 21 wherein the proppant is a sand.

26. The method of making a well treatment material of claim 21 wherein the proppant is a natural occurring organic material.

27. The method of making a well treatment material of claim 21 wherein the proppant is a synthetic material.

28. The method of making a well treatment material of claim 21 wherein the materials useful for treating a wellbore are a friction reducer, a gelling agent, a clay control agent, a biocide, a scale inhibitor, a chelating agent, a gel-breaker, an oxygen scavenger, a defoamer, a crosslinker, a wax inhibitor, an anti-sludging agent, a corrosion inhibitor, a de-emulsifier, a foaming agent, or a tracer.

29. The method of making a well treatment material of claim 21 wherein one of the materials useful for treating a wellbore is a friction reducer.

30. The method of making a well treatment material of claim 21 wherein one of the materials useful for treating a wellbore is a gelling agent.

31. The method of making a well treatment material of claim 21 wherein one of the materials useful for treating a wellbore is a surfactant

32. The method of making a well treatment material of claim 21 wherein one of the materials useful for treating a wellbore is a clay control agent.

33. The method of making a well treatment material of claim 21 wherein one of the materials useful for treating a wellbore is a biocide.

34. The method of making a well treatment material of claim 21 wherein one of the materials useful for treating a wellbore is a scale inhibitor.

35. The method of making a well treatment material of claim 21 wherein one of the materials useful for treating a wellbore is a chelating agent.

36. The method of making a well treatment material of claim 21 wherein one of the materials useful for treating a wellbore is a gel-breaker.

37. The method of making a well treatment material of claim 21 wherein one of the materials useful for treating a wellbore is an oxygen scavenger.

38. The method of making a well treatment material of claim 21 wherein one of the materials useful for treating a wellbore is a defoamer.

39. The method of making a well treatment material of claim 21 wherein one of the materials useful for treating a wellbore is a crosslinker.

40. The method of making a well treatment material of claim 21 wherein one of the materials useful for treating a wellbore is a wax inhibitor.

41. The method of making a well treatment material of claim 21 wherein one of the materials useful for treating a wellbore is an anti-sludging agent.

42. The method of making a well treatment material of claim 21 wherein one of the materials useful for treating a wellbore is a corrosion inhibitor.

43. The method of making a well treatment material of claim 21 wherein one of the materials useful for treating a wellbore is a de-emulsifier.

44. The method of making a well treatment material of claim 21 wherein one of the materials useful for treating a wellbore is a foaming agent.

45. The method of making a well treatment material of claim 21 wherein one of the materials useful for treating a wellbore is a tracer.