Platform for electrically coupling a component to a downhole transmission line

• US 8,826,972 B2
• Filed: 04/22/2008
• Issued: 09/09/2014
• Est. Priority Date: 07/28/2005
• Status: Active Grant

• Current Assignee: IntelliServ, LLC (NOV, Inc.)
• Original Assignee: IntelliServ, LLC (NOV, Inc.)
• Inventors: Flint, Jason C., Johnson, Monte L.
• Primary Examiner(s): ANDREWS, DAVID L
• Application Number:
  US12/107,403
• Publication Number:
  US 20080251247A1
• Time in Patent Office: 2,331 Days
• Field of Search: 166/250.11, 166/65.1, 166/66, 166/380, 166/242.6, 439/620.03, 439/620.07
• US Class Current: 166/65.1
• CPC Class Codes: E21B 17/006 Accessories for drilling pipes, e.g. cleaners wear protectors E21B17/10; handling drilling pipes E21B19/00; thread protectors B65D59/00
• CPC Class Codes: E21B 17/0283 characterised by the coupling being contactless, e.g. inductive
• CPC Class Codes: E21B 17/0285 characterised by electrically insulating elements

Abstract

An apparatus in accordance with the invention includes, in one embodiment, a substantially planar recessed surface for mounting and retaining a component. The platform is configured to electrically couple the component to a transmission line at a non-end point thereof. An outer contour of the component does not exceed an outer contour of the platform, and the outer contour of the platform does not exceed an outer contour of the transmission line. The transmission line is configured to link to a downhole network, and the component is configured to affect a signal on the transmission line.

Claims

1. An apparatus for electrically coupling a component to a transmission line comprising a center conductor and an outer conductive shield extending around the center conductor, the apparatus comprising:

a platform comprising a central axis, a radially outermost cylindrical surface, and a recess extending radially inward from the radially outermost cylindrical surface, wherein the recess is at least partially defined by a support surface spaced radially inward from the radially outermost surface;

an insulating barrier disposed on the support surface;

a component disposed within the recess and mounted to the insulating barrier such that the insulating barrier is radially positioned between the component and the support surface relative to the central axis of the platform;

wherein the component is configured to affect a signal on the transmission line, wherein the insulating barrier is configured to electrically isolate the component from the platform; and

connector elements configured to connect the component to at least one of the center conductor and the outer conductive shield of the transmission line when the component is connected to the transmission line.

2. The apparatus of claim 1, wherein the outer conductive shield acts as a ground for the transmission line.

3. The apparatus of claim 1, wherein the component is interchangeable with other components.

4. The apparatus of claim 1, wherein the connector elements connect the component in one of electrical series and parallel along the transmission line.

5. The apparatus of claim 1, wherein the component comprises radio frequency identification (RFID) circuitry.

6. The apparatus of claim 1, wherein the component is configured to create an impedance along the transmission line.

7. The apparatus of claim 1, wherein the outer conductive shield comprises electrically conductive sheathing surrounding the transmission line.

8. The apparatus of claim 1, wherein the transmission line is linked to a downhole network.

9. The apparatus of claim 1, wherein the component is configured to create an electrical short along the transmission line.

10. The apparatus of claim 1, wherein the component is configured to create an open circuit along the transmission line.

11. The apparatus of claim 1, wherein the transmission line is disposed along a tubular having an exterior wall and a bore, to provide a signal path along the longitudinal axis of the tubular.

12. The apparatus of claim 11, wherein the tubular further comprises:

a mating surface formed intermediate the exterior wall and the bore in an end of the tubular; and

an inductive coupler mounted in the mating surface and linked to the transmission line.

13. The apparatus of claim 12, wherein the inductive coupler acts as an external antenna for an RFID circuit disposed on the component.

14. The apparatus of claim 11, wherein the platform is at least partially disposed within a wall of the tubular.

15. The apparatus of claim 1, wherein the connector elements are configured to electromagnetically link the component to the transmission line.

16. The apparatus of claim 1, wherein the component comprises at least one of a capacitor, an RDIF circuit, an inductor, a resistor, an integrated circuit, an active circuit, and a passive circuit.

17. The apparatus of claim 1, further comprising a power source to supply power to the component.

18. The apparatus of claim 1, further comprising an annular conductor, wherein the component is electrically coupled to the annular conductor, and wherein the annular conductor includes a radially outermost surface relative to the central axis of the platform that engages with the outer conductive shield of the transmission line.

19. The apparatus of claim 18, wherein the annular conductor is coupled to the platform with a flexible linking element.

20. The apparatus of claim 18, wherein the platform further comprises a circumferential groove configured to accept and hold the annular conductor.

21. The apparatus of claim 18, further comprising an insulating material disposed between the annular conductor and the platform.

22. The apparatus of claim 1, wherein the platform is configured to fit inside the outer conductive shield of the transmission line.

23. A system comprising:

a component;

a transmission line comprising a center conductor and an outer conductive shield extending around the center conductor;

a platform having a central axis and being disposed along the transmission line;

an insulating barrier disposed on a surface of the platform, wherein the component is mounted to the insulating barrier such that the insulating barrier is radially positioned between the component and the surface relative to the central axis of the platform wherein the insulating barrier is configured to electrically isolate the component from the platform;

a linking element coupling the component to the outer conductive shield;

an annular conductor disposed about the platform and extending radially outward from the platform to the outer conductive shield; and

a connector element electrically coupling the component to the center conductor.

24. The system of claim 23, wherein the outer conductive shield comprises electrically conductive sheathing surrounding the transmission line.

25. The system of claim 23, wherein the component comprises at least one of a circuit board, a capacitor, an RFID circuit, an inductor, a resistor, an integrated circuit, an active circuit, and a passive circuit.

26. The system of claim 23, wherein the component is configured to affect a signal on the transmission line;

wherein the platform is configured to electrically couple the component to at least one of the center conductor and the outer conductive shield of the transmission line; and

wherein the transmission line is disposed on a tubular to provide a signal path along a longitudinal axis of the tubular for communication with a downhole network.

27. The system of claim 26, further comprising a non-conductive coating covering the outer conductive shield, the platform and the component.

28. The system of claim 26, wherein the platform further comprises bores or channels for receiving the center conductor of the transmission line.

29. The system of claim 23, wherein the flexible linking element is coupled to the annular conductor and wherein the annular conductor has a radially outermost surface relative to the central axis of the platform that engages with the outer conductive shield of the transmission line.

30. The system of claim 29, wherein the platform further comprises a circumferential groove configured to accept and hold the annular conductor.

31. The system of claim 30, further comprising an insulating material disposed between the annular conductor and the platform.

32. The system of claim 23, wherein the platform is configured to fit inside the outer conductive shield of the transmission line.

33. A method for electrically coupling a component to a transmission line comprising a center conductor and an outer conductive shield extending around the center conductor, the method comprising:

disposing a platform between a first segment and a second segment of the coaxial transmission line, wherein the platform comprises a central axis, a radially outermost surface, and a recess extending radially inward from the outermost surface, wherein the recess is at least partially defined by a support surface spaced radially inward from the radially outermost surface;

disposing an insulating barrier on the support surface;

mounting the component within the recess and on the insulating barrier such that the insulating barrier is radially positioned between the component and the support surface relative to the central axis of the platform;

electrically isolating the component from the platform with the insulating barrier;

connecting the component to at least one of the center conductor and the outer conductive shield of the transmission line;

linking the transmission line to a downhole network; and

affecting a signal on the transmission line with the component.

34. The method of claim 33, further comprising remotely activating the component via the downhole network.

35. The method of claim 33, further comprising disposing the transmission line on a tubular to provide a signal path along a longitudinal axis of the tubular for communication with the downhole network.

36. The method of claim 35, further comprising determining a connectivity status of the tubular by remote activation of the component via the downhole network.

37. The method of claim 33, wherein connecting the component to at least one of the center conductor and the outer conductive shield of the transmission line comprises:

coupling the component to the outer conductive shield of the transmission line via a flexible linking element; and

inserting the center conductor of the transmission line into a channel extending axially from one end of the platform.

38. The method of claim 33, wherein disposing a platform between a first segment and a second segment of the transmission line comprises inserting the platform into the outer conductive shield of the transmission line.

39. A method for electrically coupling a component to a transmission line comprising a center conductor and an outer conductive shield extending around the center conductor, the method comprising:

disposing an insulating barrier on a surface of a platform, wherein the platform includes a central axis;

mounting a component to the insulating barrier such that the insulating barrier is radially positioned between the component and the surface relative to the central axis of the platform;

electrically isolating the component from the surface of the platform with the insulating barrier;

electrically coupling the component to the outer conductive shield of the transmission line with an annular conductor extending radially outward from the platform to the outer conductive shield;

electrically coupling the component to the center conductor of the transmission line; and

disposing the transmission line on a tubular to provide a signal path along a longitudinal axis of the tubular for communication with a downhole network.

40. The method of claim 39, further comprising inserting the platform into the outer conductive shield of the transmission line.