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US-2024401725-A1 · Dec 5, 2024 · US
Flexible pipe body layer and method of producing same
US9995416B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9995416-B2 |
| Application number | US-201314046668-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 4, 2013 |
| Priority date | Oct 25, 2012 |
| Publication date | Jun 12, 2018 |
| Grant date | Jun 12, 2018 |
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- Title
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Abstract
Official abstract text for this publication.
A flexible pipe body layer and method of producing a flexible pipe body layer are disclosed. The method includes coextruding an inner sub-layer and an outer sub-layer, wherein the inner sub-layer and outer sub-layer comprise a polymer, and wherein the inner sub-layer has a lower modulus of elasticity than the outer sub-layer.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method of producing a flexible pipe body, comprising: providing a tubular layer by coextruding an inner sub-layer and an outer sub-layer, wherein the inner sub-layer and outer sub-layer comprise a polymer, and wherein the inner sub-layer has a lower modulus of elasticity than the outer sub-layer, and wherein the inner sub-layer comprises a material having a yield strength that is between 30% and 70% lower than the outer sub-layer; and wherein the inner sub-layer and outer sub-layer are chemically bonded together, directly during coextrusion, and wherein the inner sub-layer comprises PVDF, HDPE, PA-11, PA-12, PEX, PEEK, PPS, FEP or a mixture thereof, and the inner sub-layer and outer sub-layer comprise different grades or different forms of the same polymer, and further comprising forming an armour layer over a radially outer portion of the tubular layer, the armour layer having gaps between adjacent windings thereof. 2. A method as claimed in claim 1 wherein the step of chemically bonding comprises bonding the inner sub-layer indirectly to the outer sub-layer via a tie layer. 3. A method as claimed in claim 1 further comprising co-extruding a further sub-layer between the inner and outer sub-layers, wherein the further sub-layer has a modulus of elasticity intermediate that of the inner and outer sub-layers. 4. A method of producing a flexible pipe body comprising providing the tubular layer as claimed in claim 1 , and forming an outer sheath over the armour layer. 5. A method of producing a flexible pipe comprising providing a flexible pipe body as claimed in claim 4 and attaching one or more end fitting thereto. 6. A tubular layer for a flexible pipe body as claimed in claim 1 , wherein the tubular layer for a flexible pipe body is capable of withstanding internal pressures of 55 MPa or more. 7. A method as claimed in claim 1 , wherein the inner sub-layer and outer sub-layer are directly chemically bonded together. 8. A method as claimed in claim 7 , wherein the inner sub-layer and outer sub-layer comprise different grades of the same polymer. 9. A method as claimed in claim 8 , wherein the inner sub-layer and outer sub-layer comprise different grades of PVDF.
Assignees
Inventors
Classifications
- B32B1/08Primary
Tubular products · CPC title
comprising polyesters · CPC title
three or more layers · CPC title
of synthetic resin · CPC title
Risers · CPC title
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Frequently asked questions
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- What does patent US9995416B2 cover?
- A flexible pipe body layer and method of producing a flexible pipe body layer are disclosed. The method includes coextruding an inner sub-layer and an outer sub-layer, wherein the inner sub-layer and outer sub-layer comprise a polymer, and wherein the inner sub-layer has a lower modulus of elasticity than the outer sub-layer.
- Who is the assignee on this patent?
- Wellstream Int Ltd, Ge Oil & Gas Uk Ltd
- What technology area does this patent fall under?
- Primary CPC classification B32B1/08. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jun 12 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).