# US 9,518,433 B2 · Tubewire injection buckling mitigation

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- Number: US 9,518,433 B2
- Document ID: US9518433B2
- Status: Granted
- Kind: B2
- Application number: 14/080,911
- Filed: 2013-11-15
- Published: 2015-05-21
- Granted: 2016-12-13
- Earliest claimed: 2013-11-15
- Assignees: Baker Hughes Incorporated
- Applicants: Baker Hughes Incorporated
- Inventors: Andre J. Naumann; Mitchell Lambert
- Web page: https://patentgrep.com/patent/US9518433B2

## CPC

- E21B 19/22: Handling reeled pipe or rod units, e.g. flexible drilling pipes {(lifting or hauling appliances using two or more cooperating endless chains B66D3/003)}
- E21B 17/20: Flexible or articulated drilling pipes {, e.g. flexible or articulated rods, pipes or cables}
- E21B 17/206: {with conductors, e.g. electrical, optical}
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

## 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.

## Claims

### Claim 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.

### Claim 2 (depends on 1)

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.

### Claim 3 (depends on 1)

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.

### Claim 4 (depends on 1)

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.

### Claim 5 (depends on 4)

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

### Claim 6 (depends on 1)

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

### Claim 7 (depends on 1)

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

### Claim 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.

### Claim 9 (depends on 8)

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.

### Claim 10 (depends on 8)

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.

### Claim 11 (depends on 8)

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.

### Claim 12 (depends on 11)

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

### Claim 13 (depends on 8)

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.