Fluid seal and method of using same

• US 20030080516A1
• Filed: 09/20/2002
• Published: 05/01/2003
• Est. Priority Date: 09/20/2001
• Status: Abandoned Application

• Current Assignee: FMC Technologies Incorporated (TechnipFMC, plc)
• Original Assignee: FMC Technologies Incorporated (TechnipFMC, plc)
• Inventors: Zheng, Qiu Shi
• Application Number:
  US10/251,492
• Publication Number:
  US 20030080516A1
• Time in Patent Office: Days
• US Class Current: 277/603
• CPC Class Codes: E21B 33/00 Sealing or packing boreholes or wells
• CPC Class Codes: E21B 33/10 in the borehole sealing the junction between main bore and laterals E21B41/0042

Abstract

A seal for inhibiting a flow of fluid through an annulus defined by a first component and a second component includes a sealing element disposed within the annulus and having at least one sealing profile in contact with a surface of the first component to inhibit a flow of fluid therebetween and means for retaining the sealing element on a surface of the second component that defines the annulus, wherein the sealing element is sealingly engaged with the second component such that a flow of the fluid is inhibited therebetween.

Claims

1. A seal for inhibiting a flow of fluid through an annulus defined by a first component and a second component, the seal comprising:

a sealing element disposed within the annulus and having at least one sealing profile in contact with a surface of the first component to inhibit a flow of fluid therebetween; and

means for retaining the sealing element on a surface of the second component that defines the annulus,

wherein the sealing element is sealingly engaged with the second component such that a flow of the fluid is inhibited therebetween.

2. A seal, according to claim 1, wherein the means for retaining the sealing element comprises a tapered inner surface of the sealing element in a press-fit relationship with a correspondingly tapered outer surface of the second component.

3. A seal, according to claim 2, wherein the means for retaining the sealing element further comprises a retaining nut threadedly engaged with the second component.

4. A seal, according to claim 1, wherein the means for retaining the sealing element comprises a threaded portion of an inner surface of the sealing element engaged with a corresponding threaded portion of an outer surface of the second component.

5. A seal, according to claim 1, wherein the means for retaining the sealing element comprises a retaining nut threadedly engaged with the second component and in contact with the sealing element.

6. A seal, according to claim 1, wherein the means for retaining the sealing element comprises an outer surface of the sealing element in a press-fit relationship with an inner surface of the second component.

7. A seal, according to claim 6, wherein the means for retaining the sealing element further comprises a retaining nut threadedly engaged with the second component and in contact with the sealing element.

8. A seal for inhibiting a flow of fluid through an annulus defined by a first component and a second component, the seal comprising:

a sealing element disposed within the annulus and comprising;

a first leg terminating in a first sealing profile in contact with an inner surface of the first component for inhibiting a flow of fluid within the annulus in a first direction;

a second leg terminating in a second sealing profile in contact with the inner surface of the first component for inhibiting a flow of the fluid within the annulus in a second direction counter to the first direction; and

a tapered inner surface of the sealing element in a press-fit relationship with a correspondingly tapered outer surface of the second component for retaining the sealing element on the second component and for inhibiting a flow of the fluid within the annulus therebetween.

9. A seal, according to claim 8, wherein each of the tapered inner surface and the tapered outer surface are inclined at an angle within a range of about one degree to about ten degrees with respect to a central axis of the seal.

10. A seal, according to claim 8, wherein each of the first and second sealing profiles includes a contoured surface in contact with the surface of the first component to inhibit the flow of the fluid therebetween.

11. A seal, according to claim 10, wherein each of the contoured surfaces have a radius of about 3.3 mm.

12. A seal, according to claim 8, wherein the sealing element comprises a material having a yield strength within a range of about 450 MPa to about 1,000 MPa.

13. A seal according to claim 8, wherein the sealing element comprises a material selected from the group consisting of beryllium copper, a nickel/copper alloy, and a nickel/chromium alloy.

14. A seal, according to claim 8, wherein at least one of the legs further comprises a surface inclined at an angle within a range of about one degree to about 40 degrees with respect to a central axis of the seal.

15. A seal, according to claim 8, wherein the sealing profiles have an interference fit relationship with the inner surface of the first component.

16. A seal, according to claim 8, wherein:

an outside diameter of the first sealing profile is larger than an outside diameter of the second sealing profile;

the first sealing profile is in contact with a first portion of the inner surface of the first component; and

the second sealing profile is in contact with a second, smaller diameter, portion of the inner surface of the first component.

17. A seal, according to claim 8, further comprising a secondary sealing element disposed in a recess defined by the sealing element and in contact with the inner surface of the first component, such that the fluid within the annulus is inhibited from flowing therebetween.

18. A seal, according to claim 17, wherein the secondary sealing element further comprises an elastomeric material.

19. A seal, according to claim 8, further comprising a retaining nut threadedly engaged with the second component and in contact with the sealing element for further retaining the sealing element on the second component.

20. A seal, according to claim 8, wherein the tapered inner surface of the sealing element and the tapered outer surface of the second member are galled.

21. A seal, according to claim 8, wherein each of the tapered inner surface of the sealing element and the tapered outer surface of the second member further comprise recesses and protrusions that are mechanically meshed for retaining the sealing element on the second component.

22. A seal, according to claim 8, wherein each of the tapered inner surface and the tapered outer surface has a surface finish of no less than about 0.4 micrometers R_a.

23. A seal, according to claim 8, wherein each of the tapered inner surface and the tapered outer surface has a surface finish within a range of about 0.4 micrometers R_a and about 1.6 micrometers R_a.

24. A seal for inhibiting a flow of fluid through an annulus defined by a first component and a second component, the seal comprising:

a sealing element disposed within the annulus and comprising;

a first leg terminating in a first sealing profile in contact with an inner surface of the first component for inhibiting a flow of fluid within the annulus in a first direction;

a second leg terminating in a second sealing profile in contact with the inner surface of the first component for inhibiting a flow of the fluid within the annulus in a second direction counter to the first direction; and

a threaded inner surface of the sealing element engaged with a threaded portion of an outer surface of the second component for retaining the sealing element on the second component.

25. A seal, according to claim 24, wherein each of the first and second sealing profiles includes a contoured surface in contact with the surface of the first component to inhibit the flow of the fluid therebetween.

26. A seal, according to claim 25, wherein each of the contoured surfaces have a radius of about 3.3 mm.

27. A seal, according to claim 24, wherein the sealing element comprises a material having a yield strength within a range of about 450 MPa to about 1,000 MPa.

28. A seal, according to claim 24, wherein the sealing element comprises a material selected from the group consisting of beryllium copper, a nickel/copper alloy, and a nickel/chromium alloy.

29. A seal, according to claim 24, wherein at least one of the legs further comprises a surface inclined at an angle within a range of about one degree to about 40 degrees with respect to a central axis of the seal.

30. A seal, according to claim 24, wherein the sealing profiles have an interference fit relationship with the inner surface of the first component.

31. A seal, according to claim 24, wherein:

an outside diameter of the first sealing profile is larger than an outside diameter of the second sealing profile;

the first sealing profile is in contact with a first portion of the inner surface of the first component; and

the second sealing profile is in contact with a second, smaller diameter, portion of the inner surface of the first component.

32. A seal, according to claim 24, further comprising a secondary sealing element disposed in a recess defined by the sealing element and in contact with the inner surface of the first component, such that the fluid within the annulus is inhibited from flowing therebetween.

33. A seal, according to claim 32, wherein the secondary sealing element further comprises an elastomeric material.

34. A seal, according to claim 24, wherein the sealing element further comprises a tapered inner surface in contact with a corresponding tapered outer surface of the second component for inhibiting a flow of the fluid therebetween.

35. A seal, according to claim 24, wherein each of the threaded inner surface of the sealing element and the threaded portion of the outer surface of the second component are galled.

36. A seal, according to claim 24, wherein each of the tapered inner surface of the sealing element and the tapered outer surface of the second member further comprise recesses and protrusions that are mechanically meshed for retaining the sealing element on the second component.

37. A seal for inhibiting a flow of fluid through an annulus defined by a first component and a second component, the seal comprising:

a first sealing element having a first leg terminating in a first sealing profile in contact with the first component and a second leg terminating in a second sealing profile in contact with a flange of the second component; and

a second sealing element having a first leg terminating in a first sealing profile in contact with the first component and a second leg terminating in a second sealing profile in contact with the flange of the second component.

38. A seal, according to claim 37, further comprising:

a first retaining nut threadedly engaged with the second component and in contact with the first sealing element for retaining the first sealing profile of the first sealing element in contact with the inner surface of the first component and for retaining the second sealing profile of the first sealing element in contact with the flange of the second component; and

a second retaining nut threadedly engaged with the second component and in contact with the second sealing element for retaining the first sealing profile of the second sealing element in contact with the inner surface of the first component and for retaining the second sealing profile of the second sealing element in contact with the flange of the second component.

39. A seal, according to claim 37, wherein each of the first sealing profiles includes a contoured surface in contact with the inner surface of the first component for inhibiting a flow of the fluid therebetween and each of the second sealing profiles includes a contoured surface in contact with the flange of the second component for inhibiting a flow of the fluid therethrough.

40. A seal, according to claim 37, wherein each of the contoured surfaces have a radius of about 3.3 mm.

41. A seal, according to claim 37, wherein each of the sealing elements comprises a material having a yield strength within a range of about 450 MPa to about 1,000 MPa.

42. A seal, according to claim 37, wherein each of the sealing elements comprises a material selected from the group consisting of beryllium copper, a nickel/copper alloy, and a nickel/chromium alloy.

43. A seal, according to claim 37, wherein each of the legs further comprises a surface inclined at an angle within a range of about one degree to about 40 degrees with respect to a central axis of the seal.

44. A seal, according to claim 37, wherein each of the first sealing profiles has an interference fit relationship with the inner surface of the first component.

45. A seal for inhibiting a flow of fluid through an annulus defined by a first component and a second component, the seal comprising:

a sealing element disposed within the annulus and comprising;

a first leg terminating in a first sealing profile in contact with an outer surface of the first component for inhibiting a flow of fluid within the annulus in a first direction;

a second leg terminating in a second sealing profile in contact with the outer surface of the first component for inhibiting a flow of the fluid within the annulus in a second direction counter to the first direction; and

an outer surface of the sealing element in a press-fit relationship with a corresponding inner surface of the second component for retaining the sealing element on the second component and for inhibiting a flow of the fluid within the annulus therebetween.

46. A seal, according to claim 45, wherein each of the first and second sealing profiles includes a contoured surface in contact with the surface of the first component to inhibit the flow of the fluid therebetween.

47. A seal, according to claim 46, wherein each of the contoured surfaces have a radius of about 3.3 mm.

48. A seal, according to claim 45, wherein the sealing element comprises a material having a yield strength within a range of about 450 MPa to about 1,000 MPa.

49. A seal, according to claim 45, wherein the sealing element comprises a material selected from the group consisting of beryllium copper, a nickel/copper alloy, and a nickel/chromium alloy.

50. A seal, according to claim 45, wherein the sealing profiles have an interference fit relationship with the outer surface of the first component.

51. A seal, according to claim 45, wherein:

an inside diameter of the first sealing profile is smaller than an inside diameter of the second sealing profile;

the first sealing profile is in contact with a first portion of the outer surface of the first component; and

the second sealing profile is in contact with a second, larger diameter, portion of the outer surface of the first component.

52. A seal, according to claim 45, further comprising a secondary sealing element disposed in a recess defined by the second component and in contact with the first component, such that the fluid within the annulus is inhibited from flowing therebetween.

53. A seal, according to claim 52, wherein the secondary sealing element further comprises an elastomeric material.

54. A seal, according to claim 45, further comprising a retaining nut threadedly engaged with the second component and in contact with the sealing element for further retaining the sealing element on the second component.

55. A seal, according to claim 45, wherein the outer surface of the sealing element and the inner surface of the second component are galled.

56. A seal, according to claim 45, wherein each of the tapered inner surface of the sealing element and the tapered outer surface of the second member further comprise recesses and protrusions that are mechanically meshed for retaining the sealing element on the second component.

57. A seal, according to claim 45, wherein each of the outer surface of the sealing element and the inner surface of the second component has a surface finish of no less than about 0.4 micrometers R_a.

58. A seal, according to claim 45, wherein each of the outer surface of the sealing element and the inner surface of the second component has a surface finish within a range of about 0.4 micrometers R_a and about 1.6 micrometers R_a.

59. A seal for inhibiting a flow of fluid through an annulus defined by a first component and a second component, the seal comprising:

a sealing element disposed within the annulus and comprising;

a first leg terminating in a first sealing profile in contact with an outer surface of the first component for inhibiting a flow of fluid therebetween in a first direction;

a second leg terminating in a second sealing profile in contact with the outer surface of the first component for inhibiting a flow of the fluid therebetween in a second direction counter to the first direction;

a third leg terminating in a third sealing profile in contact with an inner surface of the second component for inhibiting a flow of the fluid therebetween in the first direction; and

a fourth leg terminating in a fourth sealing profile in contact with an inner surface of the second component for inhibiting a flow of the fluid therebetween in the second direction.

60. A seal, according to claim 59, further comprising a retaining nut threadedly engaged with the second component and in contact with the sealing element for further retaining the sealing element in contact with the first component and the second component.

61. A seal, according to claim 59, wherein each of the first and second sealing profiles includes a contoured surface in contact with the surface of the first component to inhibit the flow of the fluid therebetween.

62. A seal, according to claim 61, wherein each of the contoured surfaces have a radius of about 3.3 mm.

63. A seal, according to claim 59, wherein the sealing element comprises a material having a yield strength within a range of about 450 MPa to about 1,000 MPa.

64. A seal, according to claim 59, wherein the sealing element comprises a material selected from the group consisting of beryllium copper, a nickel/copper alloy, and a nickel/chromium alloy.

65. A seal, according to claim 59, wherein the sealing profiles have an interference fit relationship with the outer surface of the first component.

66. A seal, according to claim 59, wherein:

an inside diameter of the first sealing profile is smaller than an inside diameter of the second sealing profile;

the first sealing profile is in contact with a first portion of the outer surface of the first component; and

the second sealing profile is in contact with a second, larger diameter, portion of the outer surface of the first component.

67. A seal, according to claim 59, further comprising a secondary sealing element disposed in a recess defined by the second component and in contact with the first component, such that the fluid within the annulus is inhibited from flowing therebetween.

68. A seal, according to claim 59, wherein the secondary sealing element further comprises an elastomeric material.

69. A method, comprising:

providing a sealing element including at least one sealing profile within an annulus defined by a first component and a second component;

contacting the at least one sealing profile with a surface of the first component to inhibit a flow of fluid therebetween; and

retaining the sealing element on an annulus-side surface of the second component such that a flow of the fluid is inhibited therebetween.

70. A method, according to claim 69, wherein retaining the sealing element further comprises pressing a tapered inner surface of the sealing element onto a correspondingly tapered outer surface of the second component.

71. A method, according to claim 70, wherein retaining the sealing element further comprises galling the inner surface of the sealing element and the outer surface of the second component.

72. A method, according to claim 70, wherein retaining the sealing element further comprises mechanically meshing recesses and protrusions of each of the inner surface of the sealing element and the outer surface of the second component.

73. A method, according to claim 70, wherein retaining the sealing element further comprises heating the sealing element, placing the sealing element on the second component, and allowing the sealing element to cool.

74. A method, according to claim 69, wherein retaining the sealing element further comprises:

threadedly engaging a retaining nut with the second component; and

advancing the threadedly engaged retaining nut into contact with the sealing element.

75. A method, according to claim 74, wherein retaining the sealing element further comprises galling threads of the sealing element and threads of the second component.

76. A method, according to claim 69, wherein retaining the sealing element further comprises:

threadedly engaging a retaining nut with the second component; and

advancing the threadedly engaged retaining nut into contact with the sealing element.

77. A method, according to claim 69, further comprising threadedly engaging the sealing element with the second component.

78. A method, according to claim 69, wherein retaining the sealing element further comprises pressing an outer surface of the sealing element into a corresponding inner surface of the second component.

79. A method, according to claim 78, wherein retaining the sealing element further comprises:

threadedly engaging a retaining nut with the second component; and

advancing the threadedly engaged retaining nut into contact with the sealing element.

80. A method, according to claim 78, wherein retaining the sealing element further comprises galling the outer surface of the sealing element and the inner surface of the second component.

81. A method, according to claim 78, wherein retaining the sealing element further comprises mechanically meshing recesses and protrusions of each of the inner surface of the sealing element and the outer surface of the second component.

82. A method, according to claim 78, wherein retaining the sealing element further comprises heating the second component, placing the sealing element into the second component, and allowing the second component to cool.