Tubewire injection buckling mitigation

Patent metadata

Field	Value
Publication number	US-9518433-B2
Application number	US-201314080911-A
Country	US
Kind code	B2
Filing date	Nov 15, 2013
Priority date	Nov 15, 2013
Publication date	Dec 13, 2016
Grant date	Dec 13, 2016

Abstract

A tubewire buckling mitigation assembly for use with injection of tubewire into coiled tubing. The mitigation assembly includes a passageway having a small diameter passage, an intermediate diameter section and first and second tapered transition sections.

First claim

What is claimed is:

1. A tubewire injection system for injecting tubewire into coiled tubing, the system comprising:
a tubewire injector having a drive mechanism to apply an axial pushing force to inject the tubewire;
coiled tubing having an inner diameter and presenting an open whip end into which the tubewire is injected; and
a tubewire buckling mitigation assembly located between the injector and the coiled tubing and comprising a passageway which receives the tubewire from the injector, the passageway providing:
a small diameter passage having an interior diameter that inhibits buckling of the tubewire;
an intermediate diameter section having an interior diameter that permits limited buckling of the tubewire; and
a first tapered transition section disposed between the small diameter passage and the intermediate diameter section; and
a second tapered transition section disposed between the intermediate diameter section and the open whip end, the second tapered transition section providing a tapered transition which opens from the intermediate diameter section to the open whip end.

2. The tubewire injection system of claim 1 wherein the intermediate diameter section presents an interior diameter that is sized to inhibit bucking of the tubewire.

3. The tubewire injection system of claim 1 wherein the intermediate diameter section has a length that generates axial resistance friction force with the tubewire to resist injection forces.

4. The tubewire injection system of claim 1 wherein the intermediate diameter section has a length that is from about 5 feet to about 20 feet.

5. The tubewire injection system of claim 4 wherein the intermediate diameter section has a length that is about 10 feet.

6. The tubewire injection system of claim 1 wherein the first tapered transition section has an angle of taper of about one degree.

7. The tubewire injection system of claim 1 wherein the second tapered transition section has an angle of taper of about one degree.

8. A tubewire injection system for use with a tubewire injector having a drive mechanism to apply an axial pushing force to inject tubewire into coiled tubing, the system comprising:
coiled tubing having an inner diameter and presenting an open whip end into which the tubewire is injected; and
a tubewire buckling mitigation assembly located between the injector and the coiled tubing and comprising a passageway which receives the tubewire from the injector, the passageway providing:
a small diameter passage having an interior diameter that inhibits buckling of the tubewire;
an intermediate diameter section having an interior diameter that permits limited buckling of the tubewire;
a first tapered transition section disposed between the small diameter passage and the intermediate diameter section; and
a second tapered transition section disposed between the intermediate diameter section and the open whip end, the second tapered transition section providing a tapered transition which opens from the intermediate diameter section to the open whip end.

9. The tubewire injection system of claim 8 wherein the intermediate diameter section presents an interior diameter that is sized to inhibit bucking of the tubewire.

10. The tubewire injection system of claim 8 wherein the intermediate diameter section has a length that generates axial resistance friction force with the tubewire to resist injection forces.

11. The tubewire injection system of claim 8 wherein the intermediate diameter section has a length that is from about 5 feet to about 20 feet.

12. The tubewire injection system of claim 11 wherein the intermediate diameter section has a length that is about 10 feet.

13. The tubewire injection system of claim 8 wherein the first and second tapered transition sections have an angle of taper from about one degree to about five degrees.

Assignees

• Baker Hughes Inc

Inventors

• Naumann Andre J
• Lambert Mitchell

Classifications

• E21B19/22 Primary

  Handling reeled pipe or rod units, e.g. flexible drilling pipes {(lifting or hauling appliances using two or more cooperating endless chains B66D3/003)} · CPC title

• E21B17/206 Primary

  with conductors, e.g. electrical, optical · CPC title

• E21B17/20 Primary

  Flexible or articulated drilling pipes {, e.g. flexible or articulated rods, pipes or cables} · CPC title