Method and system for protecting a conduit in an annular space around a well casing

• US 9,416,598 B2
• Filed: 05/16/2012
• Issued: 08/16/2016
• Est. Priority Date: 05/18/2011
• Status: Expired due to Fees

• Current Assignee: Shell Oil Company (Shell Plc)
• Original Assignee: Shell Oil Company (Shell Plc)
• Inventors: Birch, William
• Primary Examiner(s): Thompson, Kenneth L
• Application Number:
  US14/117,799
• Publication Number:
  US 20140076576A1
• Time in Patent Office: 1,553 Days
• Field of Search: 166/63, 166/299, 166/297, 102/303, 102/305, 89/11.5
• US Class Current: 1/1
• CPC Class Codes: E21B 17/1035 for plural rods, pipes or lines, e.g. for control lines
• CPC Class Codes: E21B 17/1078 Stabilisers or centralisers for casing, tubing or drill pipes devices for off-center positioning E21B17/10; E21B17/1007 - E21B17/1064 take precedence
• CPC Class Codes: E21B 43/00 Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells applicable only to water E03B
• CPC Class Codes: E21B 43/119 Details, e.g. for locating perforating place or direction

Abstract

To protect a hydraulic, electric and/or other conduit in an annular space around a well casing against damage from perforating and other well operations the conduit is arranged in a groove in a U- or V-shaped protective gutter, which is secured to the outer surface of the well casing and which is capable of deflecting a shaped charge.

Claims

1. A method for protecting a conduit in an annular space around a well casing, the method comprising arranging the conduit in a groove formed in a protective gutter which is secured to the outer surface of the well casing, wherein the protective gutter is configured to protect the conduit against damage from explosive well perforating operations and has a bottom and side surfaces that are made of a material capable of deflecting a shaped charge.

2. The method of claim 1, wherein the bottom and side surfaces are arranged in a substantially U- or V-shaped configuration, and the side surfaces are located at a larger average distance from the outer surface of the well casing than the bottom.

3. The method of claim 2, wherein the side surfaces are arranged in an inverted triangular shape such that the side surfaces converge towards the bottom.

4. The method of claim 1, wherein the material is selected from the group of laminated steel, metallic composites and other ferrous and non ferrous materials of the group of laminated armored metallic and non metallic composites.

5. The method of claim 1, wherein the protective gutter is secured to the outer surface of the well casing by straps.

6. The method of claim 1, wherein the protective gutter extends in a substantially longitudinal direction along at least part of the length of the well casing and the conduit is a power, signal and/or fluid transmission conduit comprising at least one conduit selected from the group of electrical cables, hydraulic conduits and/or fiber optical cables.

7. A method for protecting a conduit in an annular space around a well casing, the method comprising arranging the conduit in a groove formed in a protective gutter which is secured to the outer surface of the well casing, wherein the protective gutter has a bottom and side surfaces that are arranged in a substantially U- or V-shaped configuration, and the side surfaces are located at a larger average distance from the outer surface of the well casing than the bottom, wherein the bottom of the protective gutter is mounted on an inverted T-shaped spacer bar.

8. The method of claim 7, wherein the protective gutter is secured to the outer surface of the well casing by straps.

9. The method of claim 8, wherein the T-shaped spacer bar comprises longitudinally spaced voids through which the straps extend.

10. The method of claim 7, wherein the protective gutter extends in a substantially longitudinal direction along at least part of the length of the well casing and the conduit is a power, signal and/or fluid transmission conduit comprising at least one conduit selected from the group of electrical cables, hydraulic conduits and/or fiber optical cables.

11. A method for protecting a conduit in an annular space around a well casing, the method comprising arranging the conduit in a groove formed in a protective gutter which is secured to the outer surface of the well casing, wherein the casing, protective gutter and conduit are installed and operated in accordance with the following steps:

securing the protective gutter to the outer surface of the well casing and arranging the conduit in the gutter at the earth surface

lowering the casing, protective gutter and conduit into a well

perforating the well casing by explosive charges;

completing the well; and

inducing hydrocarbon fluid to flow through the perforations and the interior of the casing to crude oil and/or natural gas production facilities at the earth surface.

12. The method of claim 11, wherein the protective gutter has a bottom and side surfaces that are arranged in a substantially U- or V-shaped configuration, and the side surfaces are located at a larger average distance from the outer surface of the well casing than the bottom.

13. The method of claim 12, wherein the side surfaces are arranged in an inverted triangular shape such that the side surfaces converge towards the bottom.

14. The method of claim 11, wherein the protective gutter is configured to protect the conduit against damage from explosive well perforating operations and has a bottom and side surfaces that are made of a material capable of deflecting a shaped charge.

15. The method of claim 14, wherein the material is selected from the group of laminated steel, metallic composites and other ferrous and non ferrous materials of the group of laminated armored metallic and non metallic composites.

16. A system for protecting a conduit in an annular space around a well casing, the system comprising a protective gutter which is secured to the outer surface of the well casing and comprises a groove in which the conduit is arranged, wherein the protective gutter is configured to protect the conduit against damage from explosive well perforating operation and has a bottom and side surfaces that are made of a material capable of deflecting a shaped charge.

17. The system of claim 16, wherein the protective gutter has a bottom and side surfaces, which are arranged in a substantially U- or V-shaped configuration, and the side surfaces are located at a larger average distance from the outer surface of the well casing than the bottom.

18. The system of claim 17, wherein the side surfaces are arranged in an inverted triangular shape such that the side surfaces converge towards the bottom.

19. The system of claim 16, wherein the material is selected from the group of laminated steel, metallic composites and other ferrous and non ferrous materials of the group of laminated armored metallic and non metallic composites.

20. A system method for protecting a conduit in an annular space around a well casing, the system comprising a protective gutter which is secured to the outer surface of the well casing and comprises a groove in which the conduit is arranged, wherein the protective gutter has a bottom and side surfaces that are arranged in a substantially U- or V-shaped configuration, and the side surfaces are located at a larger average distance from the outer surface of the well casing than the bottom, wherein the bottom of the protective gutter is mounted on an inverted T-shaped spacer bar.

21. The system of claim 20, wherein the protective gutter is secured to the outer surface of the well casing by straps.

22. The method of claim 21, wherein the T-shaped spacer bar comprises longitudinally spaced voids through which the straps extend.

23. The method of claim 20, wherein the protective gutter extends in a substantially longitudinal direction along at least part of the length of the well casing and the conduit is a power, signal and/or fluid transmission conduit comprising at least one conduit selected from the group of electrical cables, hydraulic conduits and/or fiber optical cables.