Annular wire harness for use in drill pipe

• US 6,392,317 B1
• Filed: 08/22/2000
• Issued: 05/21/2002
• Est. Priority Date: 08/22/2000
• Status: Expired due to Term

• Current Assignee: IntelliServ, LLC (NOV, Inc.)
• Original Assignee: David R. Hall, Joe Fox
• Inventors: Fox, Joe, Hall, David R.
• Primary Examiner(s): Ballato, Josie C
• Assistant Examiner(s): Deberadinis, Robert L
• Application Number:
  US09/642,604
• Time in Patent Office: 637 Days
• Field of Search: 307/90, 307/89, 307/104, 340/853.1, 340/854.3, 340/854.9, 439/13, 439/191, 439/194, 174/47, 324/353, 324/351, 324/35, 324/323, 175/104
• US Class Current: 307/90
• CPC Class Codes: E21B 17/003 with electrically conducting or insulating means E21B17/028 and E21B17/023 take precedence
• CPC Class Codes: E21B 17/0285 characterised by electrically insulating elements

Abstract

An annular wire harness for use in drill pipe comprising two rings interconnected by one or more insulated conductors. The rings are positioned within annular grooves located within the tool joints and the conductors are fixed within grooves along the bore wall of the pipe. The rings may be recessed within annular grooves in order to permit refacing of the tool joint. The rings are provided with means for coupling a power and data signal from an adjacent pipe to the conductors in such a fashion that the signal may be transmitted along the drill pipe and along an entire drill string.

Claims

1. An annular wire harness for use in transmitting power and data in drill pipe, comprising:

a. ring connected to another ring, or to one or more sensors, by means of one or more insulated conductors;

b. at least one ring being provided with a means for connecting the conductors to a means for transmitting a power and data signal; and

c. at least one ring being deployed within a length of drill pipe, or down hole tool having an annulus, in such a fashion that a power and data signal may be transmitted through the conductors along the section of the drill pipe which forms at least a portion of a drill string.

2. The wire harness of claim 1, wherein the rings are installed into recessed annular grooves located within the pin and box end tool joints of a drill pipe or downhole tool in such a manner that refacing of the tool joint may be achieved without removal of the wire harness.

3. The wire harness of claim 1, wherein the rings comprise a means for retraction and expansion that enables their passage through the bore of the drill pipe having one or more inside diameters.

4. The wire harness of claim 1, wherein the rings further comprise a means for preventing rotation.

5. The wire harness of claim 1, wherein the means for transmitting a power and data signal comprise an acoustic, electric, or an electromagnetic inductive means.

6. The electromagnetic inductive means of claim 5 comprising one or more axially or radially wound, or a combination of axially and radially wound, annular coils within one or more grooves.

7. The electromagnetic inductive means of claim 5 comprising an annular circuit board, within one or more grooves, having one or more layers of radial, toroidal, or segmented traces printed thereon.

8. The wire harness of claim 1, wherein the rings comprise a means for transmitting a power and data signal consisting of an acoustic, electric, or an electromagnetic inductive means.

9. The electromagnetic inductive means of claim 8 comprising one or more axially or radially wound, or a combination of axially and radially wound, annular coils.

10. The electromagnetic inductive means of claim 8 comprising an annular circuit board having one or more layers of radial, toroidal, or segmented traces printed thereon.

11. The electromagnetic inductive means of claim 1, wherein the coils or traces further comprise an abrasion resistant, low-friction coating.

12. The wire harness of claim 1, wherein the rings are further comprised of an electrically non-conducting material selected from the group consisting of polymers or elastomers.

13. The wire harness of claim 1, wherein the rings comprise flat or non-planar self-cleaning caps or coverings each consisting of a material having different frictional properties.

14. The wire harness of claim 1, wherein the rings comprise an electrically conductive material selected from the group consisting of metals, ceramics, or ferrites having magnetic permeability.

15. The wire harness of claim 1, wherein the conductive material is encased within an insulating material.

16. The wire harness of claim 1, wherein the insulated conductors are selected from the group consisting of single strands or twisted pairs of copper wires, coaxial cables, or fiber optic cables.

17. The wire harness of claim 1, wherein the means for connecting the conductors to the means for transmitting power and data comprises a pin and receptacle connector.

18. The wire harness of claim 1, wherein the means for connecting the conductors to the means for transmitting power and data comprises a direct contact connector.

19. The wire harness of claim 1, wherein the insulated conductors are fixed within grooves along the bore wall of the drill pipe.

20. The wire harness of claim 1, wherein the insulated conductors are secured by or embedded within a drill pipe liner.

21. The wire harness of claim 1, wherein the sensors comprise thermocouples, gamma ray detectors, accelerometers, pressure transducers, inclinometers, or strain gages for detecting the formation being drilled or the condition of a tool located within the drill pipe or downhole tools that together form the drill string.