Conduit Tube Assembly and Manufacturing Method for Subterranean Use

• US 20130094812A1
• Filed: 10/12/2011
• Published: 04/18/2013
• Est. Priority Date: 10/12/2011
• Status: Abandoned Application

• Current Assignee: Baker Hughes Incorporated (Baker Hughes Company)
• Original Assignee: Baker Hughes Incorporated (Baker Hughes Company)
• Inventors: Stoesz, Carl W.
• Application Number:
  US13/271,998
• Publication Number:
  US 20130094812A1
• Time in Patent Office: Days
• US Class Current: 385/76
• CPC Class Codes: E21B 17/023 Arrangements for connecting cables or wirelines to downhole devices
• CPC Class Codes: E21B 47/135 using light waves, e.g. infrared or ultraviolet waves
• CPC Class Codes: G02B 6/4471 Terminating devices demountable connectors G02B6/3807; Cable clamps
• CPC Class Codes: G02B 6/502 Installation methods in fluid conducts, e.g. pipelines

Abstract

A support system for fiber optic cable adjacent a bottom hole assembly is fabricated from flat sheet that has a capillary tube attached with the assembly spirally wound into a tube shape and the spiral seal being welded. Male and female end connections that comprise timed threads are then oriented at each tube end with respect to where the capillary tube terminates so that there will be a reduced or no misalignment of fiber optic cable ends when timed threads are fully made up. A predetermined tightening torque range also allows some fine tuning of the desired alignment to reduce any offset of fiber optic cable ends. The capillary can run inside or outside the assembled tube shape.

Claims

1. A modular assembly for support of an elongated data communication device from a tubular string supporting a bottom hole assembly, comprising:

at least two tubular housings having opposed ends and adapted to be supported by the tubular string;

at least one transport conduit mounted to each said tubular housings and extending the substantial length thereof with conduit ends terminating adjacent said opposed ends of said tubular housing to which said transport conduit is mounted;

said ends of said tubular housings comprising end connections to allow said tubular housings to connect to each other such that a data communication device can be extended through said transport conduits on said tubular housings.

2. The assembly of claim 1, wherein:

said end connections are configured to control circumferential offset between transport conduits on adjacent tubular housings to a predetermined value.

3. The assembly of claim 2, wherein:

said predetermined value can be altered by using different assembly torque values within a predetermined torque range.

4. The assembly of claim 2, wherein:

said end connections comprise timed threads.

5. The assembly of claim 4, wherein:

said end connections are marked for the start of said timed thread and said mark is oriented a predetermined offset from an adjacent end of a transport conduit.

6. The assembly of claim 1, wherein:

said transport conduit is mounted to an exterior surface of said tubular housing.

7. The assembly of claim 1, wherein:

said transport conduit is mounted to an interior surface of said tubular housing and further comprises ends that extend through respective openings in said tubular housing.

8. The assembly of claim 1, wherein:

said transport conduits have a gap between adjacent tubular housings.

9. The assembly of claim 8, wherein:

said transport conduits are spirally wound around said tubular housing.

10. The assembly of claim 1, wherein:

said tubular housing is formed from a flat sheet with said transport conduit attached thereto and then rolled into a tubular shape with a seam.

11. The assembly of claim 10, wherein:

said seam is spirally shaped.

12. The assembly of claim 10, wherein:

said seam is straight.

13. The assembly of claim 8, wherein:

said assembly further comprises a fiber optic cable extending through said transport conduits and bridging said gap.

14. The assembly of claim 13, further comprising:

a connector for said fiber optic cable located in an axially offset location from surfaces that contact when said end connections of adjacent tubular housings make contact.

15. The assembly of claim 13, wherein:

a connector for said fiber optic cable;

at least one exterior projection on at least one said tubular housing and adjacent said connector.

17. The assembly of claim 13, wherein:

said transport conduits further contain adhesive for fixation of said fiber optic.

18. The assembly of claim 1, wherein:

one end of a transport conduit is circumferentially offset from an opposed end of said transport conduit on a single tubular housing.

19. The assembly of claim 1, wherein:

said tubular housings are loosely fitted within the tubular string.

20. The assembly of claim 1, wherein:

said tubular housings are loosely fitted outside said tubular string.

21. The assembly of claim 2, wherein:

said end connections comprise a thread whose start point is positioned at a predetermined circumferential location with respect to an adjacent transport conduit end before fixation to said tubular housing so that assembly of said tubular housings to each other using said threads results in circumferential alignment of adjacent ends of transport conduits on adjacent tubular housings within a predetermined limit.

16. The assembly of claim 16, wherein:

said at least one exterior projection comprises a pair of substantially parallel projections that span over said end connections that join adjacent tubular housings.