Downhole Component with Multiple Transmission Elements

• US 20080007425A1
• Filed: 09/26/2007
• Published: 01/10/2008
• Est. Priority Date: 05/21/2005
• Status: Abandoned Application

• Current Assignee: Schlumberger Technology Corporation (SLB)
• Original Assignee: Schlumberger Technology Corporation (SLB)
• Inventors: Hall, David, Fox, Joe, Bartholomew, David
• Application Number:
  US11/861,412
• Publication Number:
  US 20080007425A1
• Time in Patent Office: Days
• US Class Current: 340/855.8
• CPC Class Codes: E21B 17/003 with electrically conducting or insulating means E21B17/028 and E21B17/023 take precedence
• CPC Class Codes: E21B 17/0283 characterised by the coupling being contactless, e.g. inductive

Abstract

A tubular component in a downhole tool string has a first end and a second end. The first end includes first and second inductive couplers, and the second end includes third and fourth inductive couplers. The component has a first conductive medium and second conductive medium. The first conductive medium is connecting the first and third couplers, and the second conductive medium is connecting the second and fourth couplers. The first and second ends may include additional inductive couplers and the component may include an additional conductive medium connecting the additional couplers. A tubular component in a downhole tool string may have a first end and a second end and electronic equipment disposed in the component. The first end may have a first plurality of inductive couplers, and the component may have a conductive medium connecting each inductive coupler of the first plurality of inductive couplers and the electronic equipment.

Claims

1. A downhole tool string, comprising:

a plurality of components;

each component comprising a first end, a second end, and a data conductive medium intermediate and in communication with data couplers proximate the first and second ends;

at least one component of the plurality of components comprising a power conductive medium intermediate and in communication with first and second power couplers proximate the first and second ends;

wherein the power conductive medium is electrically independent of the data conductive medium.

2. The tool string of claim 1, wherein the data couplers are selected from the group consisting of acoustic couplers, optic couplers, and direct contact couplers.

3. The tool string of claim 1, wherein the data couplers are inductive couplers and the power couplers are direct contact couplers.

4. The tool string of claim 1, wherein the power transmission path comprises a segmented medium joined by couplers selected from inductive couplers and direct contact couplers.

5. The tool string of claim 1, wherein power is generated downhole or on the surface.

6. The tool string of claim 1 wherein the components are selected from the group consisting of rigid pipes, coiled tubing, jars, mud hammers, motors, seismic tools, swivels, well casing, bottomhole assemblies, shock absorbers, reamers, under-reamers, saver subs, production pipes, and combinations thereof.

7. The tool string of claim 1, wherein at least one of the components comprises electronic equipment.

8. The tool string of claim 6 wherein the electronic equipment is selected from the group consisting of network nodes, repeaters, downhole tools, computers, modems, network interface modems, processors, memories, bottom hole assemblies, seismic sources, seismic receivers, wireless transceivers, motors, turbines, generators, amplifiers, MWD tools, LWD tools, sensors, pressure sensors, temperature sensors, pumps, perforators, other tools with an explosive charge, mud-pulse sirens, switches, routers, multiplexers, piezoelectric devices, magnetostrictive devices, optical transmitters, optical regenerators, optical receivers, optical converters and combinations thereof.

9. The tool string of claim 1, wherein the power and data couplers are inductive couplers.

10. The tool string of claim 8, wherein the inductive couplers comprise magnetically conductive material comprising a composition which includes a material selected from the group consisting of ferrite, Ni, Fe, Cu, Mo, Mn, Co, Cr, V, C, Si, mu-metals, alloys, molypermalloys, metallic powder suspended in an electrically insulating material, and combinations thereof.

11. The tool string of claim 9, wherein the magnetically conducting material is an electrically insulating material.

12. The tool string of claim 1, wherein the data couplers and the power couplers are electromagnetically independent from each other.

13. The tool string of claim 11, wherein a magnetic shielding is used to electromagnetically insulate the data coupler from the power coupler.

14. The tool string of claim 9, wherein power coupler and the data coupler may utilize the same magnetically conductive material.

15. The tool string of claim 13, wherein magnetically conductive material comprises a trident shape.

16. The tool string of claim 1, wherein power conductive medium and the data conductive medium are incorporated into a single shielded coaxial cable.

17. The tool string of claim 1, wherein power conductive medium and the data conductive medium are disposed within a same bored passage.

18. The tool string of claim 1, wherein the power couplers are disposed in either a primary shoulder of the component or in a secondary shoulder of the component.

19. The tool string of claim 1, wherein the data couplers are disposed in either a primary shoulder of the component or in a secondary shoulder of the components.

20. The tool string of claim 1, wherein the power conductive medium is located in the components near the bottom of the hole.