Downhole data transmisssion line

• US 20030169179A1
• Filed: 03/11/2002
• Published: 09/11/2003
• Est. Priority Date: 03/11/2002
• Status: Abandoned Application

• Current Assignee: Gulf Coast Downhole Technologies LLC (Prysmian SPA)
• Original Assignee: Gulf Coast Downhole Technologies LLC (Prysmian SPA)
• Inventors: James, Jewell D. II
• Application Number:
  US10/095,903
• Publication Number:
  US 20030169179A1
• Time in Patent Office: Days
• US Class Current: 340/854.9
• CPC Class Codes: G02B 6/4416 Heterogeneous cables
• CPC Class Codes: G02B 6/4433 Double reinforcement laying in straight line with optical transmission element

Abstract

The invention consists of a downhole data transmission line, and a method of making the same, having at least one polymeric or glass fiber, a first containment tube surrounding the fiber, a conductive material wrapped or braided around the first tube, a layer of insulating material covering the conductive material, and a second containment tube surrounding the insulating material. The downhole transmission line preferably uses optical fibers, a stainless steel first and metal alloy second tubes, copper braiding for the conductive material, thermoplastic for the insulating material, and a protective layer surrounding the outer second tube. A well for producing oil or gas from an oil or gas reservoir that includes the data transmission line and a system for sensing and recording physical parameters over an extended distance that includes the data transmission line are described. The invention also includes methods of using the data transmission line.

Claims

1. A transmission line comprising:

at least one polymeric or glass fiber;

a first containment tube surrounding said fiber;

a conductive material wrapped or braided around said first tube;

a layer of insulating material covering said conductive material; and

a second containment tube surrounding said material.

2. The transmission line according to claim 1, wherein said fiber is of optical quality.

3. The transmission line according to claim 1, wherein said first tube is comprised of stainless steel.

4. The transmission line according to claim 1, wherein said conductive material is comprised of copper braiding.

5. The transmission line according to claim 1, wherein said insulating material is comprised of a thermoplastic.

6. The transmission line according to claim 1, wherein said second tube is comprised of a metal alloy.

7. The transmission line according to claim 1, further comprising:

a second layer of insulating material covering said conductive material.

8. The transmission line according to claim 1, further comprising:

an epoxy resin injected between said layer of insulating material and said second tube.

9. The transmission line according to claim 1, further comprising:

a protective layer surrounding said second tube.

10. The transmission line according to claim 1, further comprising:

at least a second or more conductive material layer wrapped or braided around said first tube.

11. The transmission line according to claim 10, further comprising:

a layer of insulation separating each of said conductive material layer.

12. A method of making a transmission line comprising the steps of:

providing at least one polymeric or glass fiber;

surrounding said fiber with a first containment tube;

wrapping or braiding a conductive material around said first tube;

covering said conductive material with a layer of insulating material; and

surrounding said material with a second containment tube.

13. The method of making a transmission line according to claim 12, wherein said fiber is of optical quality.

14. The method of making a transmission line according to claim 12, wherein said first tube is comprised of stainless steel.

15. The method of making a transmission line according to claim 12, wherein said conductive material is comprised of copper braiding.

16. The method of making a transmission line according to claim 12, wherein said insulating material is comprised of a thermoplastic.

17. The method of making a transmission line according to claim 12, wherein said second tube is comprised of a metal alloy.

18. The method of making a transmission line according to claim 12, further comprising the step of:

covering said conductive material with a second layer of insulating material.

19. The method of making a transmission line according to claim 12, further comprising the step of:

injecting an epoxy resin between said layer of insulating material and said second tube.

20. The method of making a transmission line according to claim 12, further comprising the step of:

surrounding said second tube with a protective layer.

21. The method of making a transmission line according to claim 12, further comprising the step of:

wrapping or braiding at least a second or more conductive material layer around said first tube.

22. The method of making a transmission line according to claim 21, further comprising the step of:

separating each of said conductive material layer with a layer of insulation.

23. A transmission line suitable for use in well monitoring comprising:

at least one polymeric or glass fiber of optical quality;

a first stainless steel containment tube surrounding said fiber;

a copper braiding wrapped around said first tube;

a first layer of thermoplastic insulating material covering said copper braiding;

a second layer of thermoplastic insulating material covering said copper braiding;

a second metal alloy containment tube surrounding said first and second layer of insulating material; and

a protective layer surrounding said second tube.

24. A transmission line suitable for use in well monitoring comprising:

at least one polymeric or glass fiber of optical quality;

a first stainless steel containment tube surrounding said fiber;

a copper braiding wrapped around said first tube;

a layer of thermoplastic insulating material covering said copper braiding;

a second metal alloy containment tube surrounding said layer of insulating material;

an epoxy resin injected between said layer of insulating material and said second tube; and

a protective layer surrounding said second tube.

25. A well for producing oil or gas from an oil or gas reservoir, said well comprising:

a hole drilled from the earth'"'"'s surface to the oil or gas reservoir;

a casing constructed and arranged to line said hole;

a string of production pipe or tubing constructed and arranged to pass through said casing to the oil or gas reservoir;

means for transferring oil or gas into the production tubing or pipe located on said plurality of pipe or tubing sections; and

a data transmission line constructed and arranged to pass between said casing and said plurality of pipe or tubing sections;

said data transmission line including;

at least one polymeric or glass fiber;

a first containment tube surrounding said fiber;

a conductive material wrapped or braided around said first tube;

a layer of insulating material covering said conductive material; and

a second containment tube surrounding said material.

26. A system for sensing and recording physical parameters over an extended distance, said system comprising:

means for receiving and recording signals representative of the physical parameters;

means for sensing the physical parameters; and

a data transmission line for connecting said means for sensing said physical parameters and said means for receiving and recording signals representative of the physical parameters;

said data transmission line including;

at least one polymeric or glass fiber;

a first containment tube surrounding said fiber;

a conductive material wrapped or braided around said first tube;

a layer of insulating material covering said conductive material; and

a second containment tube surrounding said material.

27. The system according to claim 26, further comprising:

a stationary box for containing a coil of said data transmission line.

28. The system according to claim 26, further comprising:

a pulley for directing the travel path of said data transmission line to said sites at which the physical parameters are measured.

29. A method of using a data transmission line for well monitoring, said method comprising:

measuring the properties of earth formations penetrated by wellbores with one or more instruments, said instruments generating signals in response to the properties of the earth formations; and

transmitting said signals with a data transmission line to a computer for processing and interpretation of said signals,

said data transmission line including;

at least one polymeric or glass fiber;

a first containment tube surrounding said fiber;

a conductive material wrapped or braided around said first tube;

a layer of insulating material covering said conductive material; and

a second containment tube surrounding said material.