Assembly comprising an end-fitting and an unbonded flexible pipe

Patent metadata

Field	Value
Publication number	US-10544892-B2
Application number	US-201615751288-A
Country	US
Kind code	B2
Filing date	Aug 5, 2016
Priority date	Aug 10, 2015
Publication date	Jan 28, 2020
Grant date	Jan 28, 2020

Abstract

The present invention relates to an assembly comprising an end-fitting and an unbonded flexible pipe having a length and a longitudinal axis, said flexible pipe comprising, from the inside and out, an internal armour layer, an internal pressure sheath, at least one external armour layer and an outer sheath, the first end of the unbonded flexible pipe being terminated in the end-fitting, and the end-fitting comprising means for connecting the internal armour layer to an external electrical power source. The means comprise connection points to the internal armour layer in the unbonded flexible pipe and connection points to the electrical power source wherein the connection points for the electrical power source are mounted in a housing adapted to an outer surface-part of the end-fitting.

First claim

What is claimed is:

1. An assembly comprising an end-fitting and an unbonded flexible pipe having a length and a longitudinal axis and a first and a second end, said flexible pipe comprising, from the inside and out;
an internal armour layer,
an internal pressure sheath,
at least one external armour layer and an outer sheath, the first end of the unbonded flexible pipe being terminated in the end-fitting in a pipe-end, said end-fitting opposite to the pipe-end has a flange-end comprising a flange for connection to a connector, the end-fitting comprises an annular channel next to the flange in the direction of the pipe-end, said end-fitting further comprises means for connecting the internal armour layer to an external electrical power source,
said means comprising connection points to the internal armour layer in the unbonded flexible pipe and connection points to the electrical power source wherein the connection points for the electrical power source are mounted in a housing adapted to an outer surface-part in the annular channel of the end-fitting.

2. The assembly according to claim 1 , wherein the connection points to the internal armour layer in the unbonded flexible pipe and the connection points to the electrical power source are connected by an electrical conductor electrically insulated from the end-fitting.

3. The assembly according to claim 1 , wherein the end-fitting comprises means for connecting the at least one external armour layer to the electrical power source, said means comprising connection points to the external armour layer in the unbonded flexible pipe.

4. The assembly according to claim 1 , wherein the housing is ATEX certified.

5. The assembly according to claim 1 , wherein the internal armour layer is wound from an elongate metallic member.

6. The assembly according to claim 1 , wherein the at least one external armour layer comprises a pressure armour.

7. The assembly according to claim 1 , wherein the at least one external armour layer comprises a tensile armour.

8. The assembly according to claim 1 , wherein the at least one external armour layer is wound from an elongate metallic member.

9. The assembly according to claim 1 , wherein the unbonded flexible pipe comprises one or more insulating layers, preferably said one or more insulating layers being terminated in the end-fitting.

10. The assembly according to claim 1 , wherein the second end of the unbonded flexible pipe is terminated in an end-fitting.

11. The assembly according to claim 1 , wherein the second end of the unbonded flexible pipe is terminated in a second end-fitting, said second end-fitting comprises means for electrically connecting the internal armour layer with at least one external armour layer.

12. The assembly according to claim 1 , wherein the surface of the end-fitting is coated with an insulating material.

13. The assembly according to claim 1 , wherein the outer surface of the end-fitting is provided with a protective sleeve.

Assignees

• Nat Oilwell Varco Denmark Is

Inventors

• Holst Thorsten
• Straarup Anders
• Larsen Tom

Classifications

• F16L25/01

  specially adapted for realising electrical conduction between the two pipe ends of the joint or between parts thereof · CPC title

• F16L11/127

  electrically conducting · CPC title

• F16L33/01 Primary

  specially adapted for hoses having a multi-layer wall · CPC title

• F16L53/34

  using electric, magnetic or electromagnetic fields, e.g. induction, dielectric or microwave heating · CPC title

• F16L11/081

  comprising one or more layers of a helically wound cord or wire (in combination with braided layers F16L11/088) · CPC title