CEMENT ADDITIVES FOR OIL-COMPATIBLE CEMENTS

• US 20110056411A1
• Filed: 12/09/2008
• Published: 03/10/2011
• Est. Priority Date: 12/10/2007
• Status: Abandoned Application

• Current Assignee: EPG (ENGINEERED NANOPRODUCTS GERMANY) AG
• Original Assignee: EPG (ENGINEERED NANOPRODUCTS GERMANY) AG
• Inventors: Endres, Klaus, Schmidt, Helmut, Schmidt, Christian
• Application Number:
  US12/746,823
• Publication Number:
  US 20110056411A1
• Time in Patent Office: Days
• US Class Current: 106/806
• CPC Class Codes: C04B 14/06 Quartz; Sand
• CPC Class Codes: C04B 14/303 Alumina
• CPC Class Codes: C04B 14/306 Zirconium oxide zircon C04B14/046
• CPC Class Codes: C04B 20/0076 characterised by the grain distribution
• CPC Class Codes: C04B 20/008 Micro- or nanosized fillers, e.g. micronised fillers with particle size smaller than that of the hydraulic binder colloidal silica C04B14/062 ; silica fume C04B18/146
• CPC Class Codes: C04B 2111/70 Grouts, e.g. injection mixtures for cables for prestressed concrete
• CPC Class Codes: C04B 24/42 Organo-silicon compounds
• CPC Class Codes: C04B 28/04 Portland cements
• CPC Class Codes: C04B 40/0028 Aspects relating to the mixing step of the mortar preparation
• CPC Class Codes: C04B 40/065 Two or more component mortars
• CPC Class Codes: C09K 8/467 containing additives for specific purposes
• CPC Class Codes: Y10T 156/10 Methods of surface bonding and/or assembly therefor

Abstract

A process for the preparation of a cement material for cementing. The process comprises adding to a cement material comprising cement and water a precondensate of at least one hydrolysable organosilane and, optionally, (nanoscale) particles.

Claims

1-24. -24. (canceled)

25. A process for the preparation of a cement material for cementing, wherein the process comprises adding to a cement material comprising cement and water a precondensate of at least one hydrolysable organosilane.

26. The process of claim 25, wherein the process further comprises adding particles to the cement material simultaneously with or following an addition of the precondensate.

27. The process of claim 26, wherein the particles comprise nanoscale particles.

28. The process of claim 27, wherein the nanoscale particles comprise one or more oxides of at least one of aluminum, zirconium, and silicon.

29. The process of claim 28, wherein the nanoscale particles comprise a silica sol.

30. The process of claim 25, wherein the hydrolysable organosilane comprises at least one of an alkyl silane and an aryl silane.

31. The process of claim 25, wherein the precondensate has been obtained by hydrolyzing the at least one hydrolysable organosilane with water.

32. The process of claim 31, wherein the at least one hydrolysable organosilane has been hydrolyzed with a substoichiometric amount of water, based on hydrolysable groups of the silane.

33. The process of claim 25, wherein the precondensate is added simultaneously with or following an addition of water to the cement.

34. The process of claim 25, wherein the cement material comprises at least one of sand and concrete aggregates.

35. The process of claim 25, wherein the process further comprises adding to the cement material an accelerator or a retardant for adjusting a setting behavior of the cement material.

36. The process of claim 26, wherein the process comprises mixing the cement and water to form a slurry, mixing the precondensate with the slurry and simultaneously or subsequently adding nanoscale particles.

37. The process of claim 25, wherein the cement comprises Portland cement.

38. A cement material obtainable by the process of claim 25.

39. A process for cementing a substrate or a geological formation, wherein the process comprises applying to or introducing into the substrate or geological formation the cement material of claim 38.

40. The process of claim 39, wherein the substrate or geological formation comprises oil.

41. The process of claim 39, wherein an object is fixed on or in the substrate or geological formation using the cement material.

42. The process of claim 41, wherein, for fixing a pipe in a well, the cement material is introduced into a gap between the pipe and a surrounding geological formation.

43. The process of claim 39, wherein for sealing or consolidation, the cement material is introduced into at least one of a porous molding, a rock and a geological formation.

44. The process of claim 39, wherein the cement material is pumped or infiltrated into at least one of a porous molding, a rock and a geological formation.

45. The process of claim 39, wherein the geological formation at least one of belongs to a petroleum or natural gas field or a landfill and is contaminated with oil.

46. A combination of a precondensate of at least one hydrolysable organosilane and a cement.

47. The combination of claim 46, wherein the combination further comprises particles.

48. The combination of claim 47, wherein the particles comprise nanoscale particles.

49. The combination of claim 48, wherein the nanoscale particles comprise nanoscale SiO₂ particles.

50. A cement additive kit, wherein the kit comprises a precondensate of at least one hydrolysable organosilane as a first component and particles as a second component.

51. The kit of claim 50, wherein the particles comprise nanoscale particles.