# US 8,967,205 B2 · Anti-extrusion layer with non-interlocked gap controlled hoop strength layer

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- Number: US 8,967,205 B2
- Document ID: US8967205B2
- Status: Granted
- Kind: B2
- Application number: 12/726,234
- Filed: 2010-03-17
- Published: 2011-09-22
- Granted: 2015-03-03
- Earliest claimed: 2010-03-17
- Assignees: Deepflex Inc.
- Applicants: Mark Kalman; Liang Yu
- Inventors: Mark Kalman; Liang Yu
- Web page: https://patentgrep.com/patent/US8967205B2

## CPC

- F16L 11/083: {three or more layers}
- Y10T 29/49826: Assembling or joining
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

In one aspect, the present disclosure relates to a tubular assembly with gap control. Embodiments disclosed herein relate to one or more embodiments of and methods for controlling gaps between helically wrapped layers in a pipe structure. A tubular assembly includes a fluid barrier, a first layer, and a second layer comprising a plurality of non-interlocking helical wraps and disposed on an outer surface of the first layer, in which the first layer is disposed between the fluid barrier and the second layer and configured to at least partially displace into a space created between adjacent non-interlocking helical wraps of the second layer.

## Claims

### Claim 1

A tubular assembly comprising:
a fluid barrier;
a first layer; and
a second layer comprising a plurality of non-interlocking helical wraps and disposed on an outer surface of the first layer,
wherein the first layer is disposed between the fluid barrier and the second layer and configured to at least partially displace into a space created between adjacent non-interlocking helical wraps of the second layer,
wherein the fluid barrier layer, the first layer, and the second layer are unbonded to one another.

### Claim 2 (depends on 1)

The tubular assembly of claim 1, wherein the first layer comprises a bedding layer.

### Claim 3 (depends on 2)

The tubular assembly of claim 2, wherein the first layer comprises an anti-extrusion layer.

### Claim 4 (depends on 3)

The tubular assembly of claim 3, wherein the anti-extrusion layer and the bedding layer comprise a single tape and the bedding layer comprises a surface of the single bonded tape.

### Claim 5 (depends on 3)

The tubular assembly of claim 3, wherein the anti-extrusion layer and the bedding layer comprise separate tapes.

### Claim 6 (depends on 2)

The tubular assembly of claim 2, wherein the bedding layer comprises an elastomer.

### Claim 7 (depends on 6)

The tubular assembly of claim 6, wherein the elastomer comprises reinforced elastomer.

### Claim 8 (depends on 1)

The tubular assembly of claim 1, wherein the second layer comprises a load resisting layer.

### Claim 9 (depends on 8)

The tubular assembly of claim 8, wherein the load resisting layer comprises a steel hoop layer.

### Claim 10 (depends on 8)

The tubular assembly of claim 8, wherein the load resisting layer comprises a composite hoop layer.

### Claim 11 (depends on 8)

The tubular assembly of claim 8, wherein the load resisting layer resists external pressure loads.

### Claim 12 (depends on 8)

The tubular assembly of claim 8, wherein the load resisting layer resists internal pressure loads.

### Claim 13 (depends on 1)

The tubular assembly of claim 1, further comprising:
an inner tensile layer disposed external to the second layer;
an outer tensile layer disposed external to the inner tensile layer; and
a jacket disposed external to the outer tensile layer.

### Claim 14 (depends on 1)

The tubular assembly of claim 1, wherein the first layer comprises:
a first tape layer; and
a second tape layer,
wherein the second tape layer is disposed on an outer surface of the first tape layer.

### Claim 15 (depends on 14)

The tubular assembly of claim 14, wherein at least one of the first tape layer and the second tape layer comprise anti-extrusion tape.

### Claim 16 (depends on 1)

The tubular assembly of claim 1, wherein the first layer comprises fillers which displace radially outward from the outer surface of the first layer into the space between the adjacent non-interlocking helical wraps of the second layer.

### Claim 17

A flexible pipe comprising:
a fluid barrier layer;
a hoop strength layer with non-interlocking helical wraps;
a bedding layer between the fluid barrier and hoop strength layer that reduces in thickness under the hoop strength layer and increases in thickness in gaps between the non-interlocking helical wraps during manufacturing, testing or operating the flexible pipe,
wherein the fluid barrier layer, the hoop strength layer, and the bedding layer are unbonded to one another.

### Claim 18 (depends on 17)

The flexible pipe in claim 17, further comprising:
an anti-extrusion layer between the fluid barrier and hoop strength layer that resists extrusion of the fluid barrier into the gaps between the non-interlocking helical wraps.

### Claim 19 (depends on 18)

The flexible pipe of claim 18, wherein the anti-extrusion layer and bedding layer comprise a single layer.

### Claim 20 (depends on 19)

The flexible pipe of claim 19, wherein the single layer comprises a helically applied tape wrap.