Title of Invention

A MARINE, FLEXIBLE AND INTEGRATED UMBILICAL

Abstract A marine, flexible, integrated umbilical (for control, injection or production) is described. The umbilical (10) comprises a number of fluid flow pipes (7; 7'; 7") and optionally electric conductors (8; 8'), a filler material between the fluid flow pipes and said optional electric conductors. The filler material comprises several inner and outer channel elements (2, 3, 4; 6, 9; 6', 9') being twisted about the longitudinal axis of the umbilical and assembled such that they form channels (11; 11'; 11") for receiving the fluid flow pipes and said optional electric conductors. An outer sheath (1; 1'; 1") of suitable material such as polyethylene, is present outside the filler material. An armouring and weight applying band is wrapped around the filler material and is laid between the filler material and the outer sheath (1; 1'; 1") in the finished umbilical (10).
Full Text The present invention relates to a marine, flexible, integrated umbilical (for control,
injection or production), which umbilical comprises a number of fluid flow pipes and
optionally electric conductors, filler material between the fluid flow pipes and the possible
electric conductors, which filler material comprises several inner and outer channel
elements that are twisted about the longitudinal axis of the umbilical and are assembled
such that they form channels for receipt of the fluid flow pipes and the possible electric
conductors, said pipes and conductors being axially free movable within the channels, and
an outer sheath of suitable material.
Complete umbilicals of this type and how they are manufactured are disclosed in
W093/171776.
Such umbilicals are designed for subsea use to transfer fluid, and optionally electric
energy, hydraulic liquid and electric signals one or both ways. As used here the term
"umbilical" is intended to encompass a flexible or bendable bundle of pipes and cables
that includes a plurality of transfer lines like electric conductors, both for energy and
signals, and fluid flow pipes, both for liquid and gas.
Such fluid flow pipes will typically be of smaller diameter and made of steel, and may, as
an example, be used for high pressure hydraulic liquid to actuate equipment, like valves,
on the seabed. Traditionally they further include a central steel pipe of larger diameter for
transportation of larger amounts of liquid, like methanol, for injection into a gas or oil
well. One or more of the flow pipes can also be used for chemicals to be injected into a
formation or return of "used" liquid. In an alternative embodiment the central steel pipe
may be replaced by a load carrying element, such as a steel wire.
Umbilicals of this type are exampled and disclosed in the above mentioned publication. It
is, however, not decisive that the umbilical comprises electric conductors in the transversal
cross section and it is conceivable as a bundle of pipes, possibly with a centrally located
pipe of substantial dimension for transportation of produced oil and gas to the surface in

the same way as a riser. Such a flowline, or production tubing, is termed IPU(Integrated
Production Umbilical).
An early use of such umbilicals was between a surface vessel and a submerged remote
operated vessel (ROV).
A need has existed to improve the impact resistance of the outer sheath of the umbilical,
which is normally made of a plastic material.
Moreover it has been common that such umbilicals include weight elements merely to ad
sufficient weight so that they shall not become buoyant. The weight elements have usually
been made of lead and have been integrated into the umbilical as part of same. Naturally
this has provided substantial additional costs to the umbilical.
According to the present invention the two above addressed problems are solved by an
umbilical of the introductorily mentioned type that are distinguished in that an armouring
and weight adding band is wrapped around the filler material and is located between the
filler material and the outer sheath of the finished umbilical.
Preferably is the armouring and weight adding band made of a metallic material, such as a
band of steel.
During fabrication the armouring and weight adding band is preferably cross laid around
the filler material, optionally in several layers.
In a useful embodiment of the invention the armouring and weight adding band has a
typical width in the order of 40-60mm and thickness in the order of 0,6-1,0mm.
Other and further objects, features and advantages will appear from the following
description of one for the time being preferred embodiment of the invention, which is
given for the purpose of description, without thereby being limiting, and given in context
with the appended drawings where:
3
Fig. 1 shows schematically a transversal cross section through an umbilical of the type that
can be used with the present invention,
Fig. 2 shows schematically a transversal cross section through an umbilical of a type for
fluid injection that can be used with the present invention,
Fig. 3 shows schematically a transversal cross section through an umbilical of the type
integrated production tubing that can be used with the present invention, and
Fig. 4 shows schematically in perspective an umbilical having two bands that are wrapped
around the filler material according to the present invention.
Fig. 1 shows a transversal cross section through a typical umbilical. The umbilical has an
outer sheath 1 made of plastic material, like extruded PE. Longitudinally extending inner,
intermediate and outer channel elements 2, 3,4 of plastic material are placed adjacent to
each other and have such a design that they lock against displacement when they are
assembled in a ring internal of the outer sheath 1. The channel elements 2, 3,4 form
longitudinally extending channels 11 for receipt of a number of fluid flow pipes 7
respectively. The fluid flow pipes 7 have slightly less outer diameter than the diameter of
the channels 11 formed between the channel elements 2, 3,4. This enables the fluid flow
pipes 7 to be axially free moveable within the channels 11 between the channel elements
2,3,4. A load carrying element 12 may optionally be centrally placed within the
umbilical.
The umbilical is manufactured such that the channel elements 2, 3,4 and the fluid flow
pipes 7 are twisted, or more correctly laid, around the central load carrying element 12. It
will be normal to have a laying length of approximately 5-10 meter, but the invention is
not limited to such lengths. By a laying length of 10 meter is it meant that the fluid flow
pipes 7 and the channel elements 2, 3,4 has been twisted (laid) one revolution around the
central element 12 over a length of 10 meters of the umbilical. This laying, together with
the axially freedom of motion of the fluid flow pipes 7 within the channels 11, provides
the ability of flexing and coiling the umbilical in the same way as flexing a wire.
Fig. 2 shows a transversal cross section through a second version of an umbilical of the
type injection umbilical. Like the umbilical above, this umbilical also has an outer sheath
1' made of plastic material, like extruded PE. Longitudinally extending inner and outer
channel elements 6, 9 of plastic material are placed adjacent to each other and have such a
design that they lock against displacement when they are assembled in a ring internal of
the outer sheath 1'. The channel elements 6, 9 form longitudinally extending channels 11'
for receipt of a number of fluid flow pipes 7' and a number of electric conductors 8
respectively. The fluid flow pipes 7' and the electric conductors 8 have slightly less outer
diameter than the diameter of the channels 11' formed between the channel elements 6, 9.
This enables the fluid flow pipes 7' and the electric conductors 8 to be axially free
moveable within the channels 11' between the channel elements 6, 9. A main fluid flow
line 5 extends centrally through the umbilical. Fig. 2 is typical and illustrative for an
injection umbilical used for downhole injection of methanol via the fluid flow line 5.
The injection umbilical is manufactured such that the channel elements 6, 9, the fluid flow
pipes T and the electric conductors 8 are twisted, or laid, around the central fluid flow line
5. Also here it will be usual to have a laying length of approximately 5-10 meters.
Fig. 3 shows a transversal cross section through a third version of an umbilical of the type
integrated production umbilical, which by the assignee of the present invention has been
denoted as IPU(Integrated Production Umbilical). Like the umbilicals above, this
umbilical also has an outer sheath 1" made of plastic material, like extruded PE.
Longitudinally extending inner and outer channel elements 6', 9' of plastic material are
placed adjacent to each other and have such a design that they lock against displacement
when they are assembled in a ring internal of the outer sheath 1". The channel elements
6', 9' form longitudinally extending channels 11" for receipt of a number of fluid flow
pipes 7" and a number of electric conductors 8' respectively. The fluid flow pipes 7" and
the electric conductors 8' have slightly less outer diameter than the diameter of the
channels 11" formed between the channel elements 6', 9'. This enables the fluid flow
pipes 7" and the electric conductors 8' to be axially free moveable within the channels
11" between the channel elements 6', 9'. A main fluid flow line 5' extends centrally
through the umbilical. The fluid flow line 5' is of substantial dimensions and fig. 3 is
typical and illustrative for an umbilical that is used for production of oil or gas from a
well.
The production umbilical is manufactured such that the channel elements 6', 9', the fluid
flow pipes 7" and the electric conductors 8' are twisted, or laid, around the central fluid
flow line 5'. Also here it will be usual to have a laying length of approximately 5-10
meters.
Fig. 4 shows a cut out of a schematic example of a marine, flexible, integrated umbilical
10, such as a control cable, injection umbilical, production umbilical or production tubing,
according to the present invention. The umbilical 10 comprises a number of fluid flow
pipes 7, and optionally electric conductors (not shown), a filler material 4 between the
fluid flow pipes 7 and the possible electric conductors.
The filler material, as more evident shown in figure 1, includes several inner and outer
channel elements 2, 3 and 4 that are twisted around the longitudinal axis of the umbilical
10. The channel elements are such assembled that they form channels 11 for receipt of the
fluid flow pipes 7 and the possible electric conductors. The pipes and the conductors are
axially free moveable within the channels 11. In addition the filler material is enclosed by
an external sheath 1 of suitable material, such as PE. An armouring and weight adding
band B is wrapped around the filler material 4 and is located between the filler material 4
and the external sheath 1 of the finished umbilical.
Normally the armouring and weight adding band B will be made of a metallic material,
such as steel. During fabrication the armouring and weight adding band B is preferably
cross laid around the filler material 4, optionally in several layers. Without being a
limitation, the armouring and weight adding band B will typically have a width in the
order of 40-60mm and thickness in the order of 0,6-1,0mm.
WE CLAIM
1. A marine, flexible, integrated umbilical (for control, injection or production), which umbilical (10)
comprises a number of fluid flow pipes (7; 7'; 7"), filler material between the fluid flow pipes, said filler
material comprises several inner and outer channel elements (2, 3, 4; 6, 9; 6', 9') being twisted about the
longitudinal axis of the umbilical and assembled such that they form channels (11; 11'; 11") for receipt of
the fluid flow, said pipes and conductors being axially freely movable within the channels, and an outer
sheath (1; 1'; 1") of suitable material, characterized in that an armouring and weight adding band (B) is
wrapped around the filler material and is laid between the filler material and the outer sheath (1; 1'; 1") in
the finished umbilical (10).
2. A marine, flexible, integrated umbilical (for control, injection or production), which umbilical (10)
comprises a number of fluid flow pipes (7; 7'; 7") and electric conductors (8; 8'), filler material between
the fluid flow pipes and said electric conductors, said filler material comprises several inner and outer
channel elements (2, 3, 4; 6, 9; 6', 9') being twisted about the longitudinal axis of the umbilical and
assembled such that they form channels (11; 11'; 11") for receipt of the fluid flow pipes and said electric
conductors respectively, said pipes and conductors being axially free movable within the channels, and an
outer sheath (I; 1'; 1") of suitable material, characterized in that an armouring and weight adding band (B)
is wrapped around the filler material and is laid between the filler material and the outer sheath (1; I'; 1") in
the finished umbilical (10).
3. A marine, flexible, integrated umbilical as claimed in any of the preceding claims, wherein the armouring
and weight adding band (B) is made of a metallic material, such as a band of steel.
4. A marine, flexible, integrated umbilical as claimed in any of the preceding claims, wherein the armouring
and weight adding band (B) is cross laid around the filler material.
5. A marine, flexible, integrated umbilical as claimed in any of the preceding claims, wherein the armouring
and weight adding band (B) has a width in the order of 40-60mm and thickness in the order of 0,6-1,0mm.]
6. A marine, flexible, integrated umbilical as claimed in according to any of the preceding claims, wherein
the armouring and weight adding band (B) is cross laid around the filler material, in several layers.


A marine, flexible, integrated umbilical (for control, injection or production) is described.
The umbilical (10) comprises a number of fluid flow pipes (7; 7'; 7") and optionally
electric conductors (8; 8'), a filler material between the fluid flow pipes and said optional
electric conductors. The filler material comprises several inner and outer channel
elements (2, 3, 4; 6, 9; 6', 9') being twisted about the longitudinal axis of the umbilical
and assembled such that they form channels (11; 11'; 11") for receiving the fluid flow
pipes and said optional electric conductors. An outer sheath (1; 1'; 1") of suitable material
such as polyethylene, is present outside the filler material. An armouring and weight
applying band is wrapped around the filler material and is laid between the filler material
and the outer sheath (1; 1'; 1") in the finished umbilical (10).

Documents:

02726-kolnp-2005-abstract.pdf

02726-kolnp-2005-claims.pdf

02726-kolnp-2005-description complete.pdf

02726-kolnp-2005-drawings.pdf

02726-kolnp-2005-form 1.pdf

02726-kolnp-2005-form 2.pdf

02726-kolnp-2005-form 3.pdf

02726-kolnp-2005-form 5.pdf

02726-kolnp-2005-international publication.pdf

2726-KOLNP-2005-ABSTRACT-1.1.pdf

2726-KOLNP-2005-AMENDED CLAIMS.pdf

2726-KOLNP-2005-CANCELLED PAGES.pdf

2726-KOLNP-2005-CORRESPONDENCE 1.1.pdf

2726-kolnp-2005-correspondence-1.2.pdf

2726-KOLNP-2005-CORRESPONDENCE.pdf

2726-KOLNP-2005-DESCRIPTION (COMPLETE)-1.1.pdf

2726-KOLNP-2005-DRAWINGS-1.1.pdf

2726-kolnp-2005-examination report.pdf

2726-KOLNP-2005-FORM 1-1.1.pdf

2726-kolnp-2005-form 18.pdf

2726-KOLNP-2005-FORM 2-1.1.pdf

2726-KOLNP-2005-FORM 27.pdf

2726-KOLNP-2005-FORM 3-1.1.pdf

2726-kolnp-2005-form 3-1.3.pdf

2726-KOLNP-2005-FORM 3.1.2.pdf

2726-kolnp-2005-form 5.pdf

2726-kolnp-2005-granted-abstract.pdf

2726-kolnp-2005-granted-claims.pdf

2726-kolnp-2005-granted-description (complete).pdf

2726-kolnp-2005-granted-drawings.pdf

2726-kolnp-2005-granted-form 1.pdf

2726-kolnp-2005-granted-form 2.pdf

2726-kolnp-2005-granted-specification.pdf

2726-KOLNP-2005-OTHERS.pdf

2726-kolnp-2005-pa.pdf

2726-kolnp-2005-reply to examination report.pdf

2726-kolnp-2005-translated copy of priority document-1.1.pdf

2726-KOLNP-2005-TRANSLATED COPY OF PRIORITY DOCUMENT.pdf

abstract-02726-kolnp-2005.jpg


Patent Number 240610
Indian Patent Application Number 2726/KOLNP/2005
PG Journal Number 21/2010
Publication Date 21-May-2010
Grant Date 19-May-2010
Date of Filing 29-Dec-2005
Name of Patentee AKER K VAERNER SUBSEA AS
Applicant Address POSTBOX 94, NO, - 1325 LYSAKER
Inventors:
# Inventor's Name Inventor's Address
1 GJERULL, FINN, PETTER B√ÖTSTOJORDET 51, N-1363 HOVIK
2 FIGENSCHOU, ARILD NORDENGEVEIN 16, 16, N-1362 BILLINGSTAD
PCT International Classification Number F16L 9/19
PCT International Application Number PCT/NO2004/00171
PCT International Filing date 2004-06-11
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 2003 2728 2003-06-16 Norway