GB2618117A - Apparatus for forming a Pipeline - Google Patents

Apparatus for forming a Pipeline Download PDF

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Publication number
GB2618117A
GB2618117A GB2206165.9A GB202206165A GB2618117A GB 2618117 A GB2618117 A GB 2618117A GB 202206165 A GB202206165 A GB 202206165A GB 2618117 A GB2618117 A GB 2618117A
Authority
GB
United Kingdom
Prior art keywords
forming roller
strip material
forming
mounting
cassette
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
GB2206165.9A
Other versions
GB202206165D0 (en
Inventor
Phillip Glanville Andrew
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RIDGWAY MACHINES Ltd
Original Assignee
RIDGWAY MACHINES Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by RIDGWAY MACHINES Ltd filed Critical RIDGWAY MACHINES Ltd
Priority to GB2206165.9A priority Critical patent/GB2618117A/en
Publication of GB202206165D0 publication Critical patent/GB202206165D0/en
Publication of GB2618117A publication Critical patent/GB2618117A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B21C37/121—Making tubes or metal hoses with helically arranged seams with non-welded and non-soldered seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B21C37/126—Supply, or operations combined with supply, of strip material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B21C37/128—Control or regulating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

An apparatus 1 for forming a pipeline from strip material 5, 7 comprises a body 2 having a central aperture 3, at least one forming roller 8, 9, 10, 11, 14, 15, 16, 17 mounted on the body, at least one mounting 4, 6 for a cassette of strip material on the body and a drive for rotating the body about the central aperture; wherein: the or each roller, the or each mounting and the cassettes of strip material are arranged so that strip material unwound from the or each cassette can be passed directly through at least one forming roller any further processing occurs. The body can then be rotated whilst a cylindrical mandrel 20 is progressed through the central aperture in order to helically wrap the mandrel in strip material and thereby form a pipeline. The forming roller(s) may be operable to plastically deform strip material to provide two or more asymmetric longitudinally extending ridges. A method for forming a length of pipeline using the apparatus is further provided.

Description

Apparatus for forming a Pipeline
Field of Invention
The present invention relates to the forming of pipelines from strip material, in particular to pipelines formed of helically wound strip material
Background to the Invention
Methods of forming pipelines by helically winding one or more strips of material in an overlapping fashion are known. One such method is disclosed in GB2280889. This document discloses a pipe body having a wall formed of a plurality of layers is continuously made by winding a single strip of material. The strip of material may be deformed before winding to provide circumferentially extending ridges that overlap and nest within each other so that adjacent and overlapping sections of the material inter-lock and resist loads placed on the finished structure.
A pipeline formed in this manner may be provided with an internal liner, such as a metal or polymer pipeline. In some cases the liner may act as a mandrel about which the strips of material are helically wound.
GB2496137 discloses an improved method of forming a pipeline by helically winding strips of material and the associated pipeline. This method involves providing the strips of material with longitudinally extending asymmetric ridges that are formed to interlock with each other when a portion of a strip is overlaid with an adjacent portion of a strip. The pipeline of GB2496137 is particularly suitable for carrying hydrocarbon, gas or liquid products under pressure. The interlocking layers of strips of material can produce a very robust pipe construction that resists loads on the pipe. This is particularly true if the pipelines are formed of relatively strong materials such as marten si ti c steel.
As the pipeline is generally used for oil and gas production, there is a need for a method of forming a pipeline according to GB2496137 requires the processing of strip material to provide the longitudinally extending ridges and then subsequently wrapping the strip material in a helical manner to form a pipeline that can be done on-site, away from a factory setting, for example in remote oil or gas production facilities. It has been proposed to form the pipeline by first processing a spool of strip material to provide a longitudinally extending ridge in the strip material, then winding the processed strip material on to another reel, then mounting the reels of processed strip material onto a winding machine, and finally winding the processed strip material to form a pipeline. However this method has been found to be problematic as after the longitudinal extending ridges are formed in the strip material spooling the material on a reel requires much more space than spooling flat strip material. It is estimated that in some embodiments spooling a strip material with ridges provided in accordance with GB 2496137 would result in a reel with five times the radius than prior to providing the ridges. This is because the ridges do not interlock with one another when the processed strip material is spooled on a reel; thus providing ridges on the strip material effectively significantly increases the thickness of the material for spooling purposes.
In light of the above there is a need for an improved method and apparatus for forming pipeline from strip material in which the strip material is provided with longitudinally extending ridges.
Summary of the Invention
The present invention provides an apparatus for forming a pipeline from strip material comprising: a body having a central aperture; a first forming roller mounted on the body; a first mounting for a first cassette of strip material on the body; and a drive for rotating the body about the central aperture; wherein: the first forming roller and first mounting are arranged so that strip material unwound from a first cassette positioned on the first mounting can be passed directly through the first forming roller before any further processing occurs The apparatus of the present invention can be operated in the following manner. A first cassette of strip material is rotatably mounted on the first mounting and an end of the strip material is fed from the first cassette through the first forming roller. A mandrel is positioned through the central aperture of the body. The end of the strip material is then affixed to the mandrel. The drive is then operated to rotate the body about the central aperture as the mandrel is progressed through the central aperture relative to the body. The strip is then unwound from the cassette, formed by the first forming roller, and wrapped about the mandrel to form a pipeline.
The progression of the mandrel through the central aperture can be achieved by moving the body along the mandrel whilst holding the mandrel stationary. Alternatively, the progression of the mandrel through the central aperture can be achieved by moving the mandrel through the body whilst holding the body stationary. Alternatively both the mandrel and the body can be moved in opposing directions or in the same direction at differing speeds such that mandrel progresses relative to the body.
The apparatus of the present Invention is advantageous in that it provides a compact apparatus for forming a pipeline from strip material. The apparatus allows a strip material to be formed, for example to have longitudinal ridges as disclosed in the prior art, after being unrolled from a cassette and before being wrapped around a mandrel. There is no need for the strip material to be re-rolled on a cassette after forming and before wrapping around a mandrel, rather by mounting the or each forming rollers on the body it is possible to combine the forming and wrapping steps in a single apparatus. This is achieved by having the body formed to be rotatable around a central aperture and mounting the or each forming rollers on the body to rotate about the central aperture during operation of the apparatus.
The strip material used with the present invention may be any material suitable for forming pipelines that can be rolled onto a cassette and formed by a roller. It is considered that the skilled person will understand which materials are suitable for use with the apparatus of the present invention. In embodiments of the invention the strip material may be steel, for example martensitic steel In simple embodiments of the invention the apparatus will comprise a single forming roller.
However, in order to properly form a strip material it may be necessary that the strip material passes through two or more forming rollers after being unspooled from the cassette and before being wrapped about the mandrel. Therefore, the apparatus may comprise one or more additional rollers mounted on the body such that strip material from a first cassette passes through the first roller and then the or each additional roller before being wrapped around a roller.
For example, the apparatus may further comprise a second forming roller mounted on the body adjacent the first forming roller such that strip material passing through the first forming roller can be immediately subsequently passed through the second forming roller before any further processing occurs If the apparatus comprises a second forming roller it may further comprise a third forming roller mounted on the body adjacent the second forming roller such that strip material passing through the second forming roller can be immediately subsequently passed through the third forming roller before any further processing occurs.
If the apparatus comprises a third forming roller it may further comprise a fourth forming roller mounted on the body adjacent the third forming roller such that strip material passing through the third forming roller can be immediately subsequently passed through the fourth forming roller before any further processing occurs.
An apparatus may comprise further rollers positioned after a fourth forming roller such that strip material passing through the fourth forming roller can be immediately subsequently passed though the further rollers before any further processing occurs.
A forming roller of the apparatus of the present invention may be driven by an associated roller motor. A roller motor may drive a single forming roller or may drive two or more forming rollers. The apparatus of the present invention may further comprise one or more roller motors for driving the forming roller(s).
An apparatus according to the present invention may comprise a first cassette mounted on the first mounting. A first cassette may be provided with strip material spooled thereon. Preferably cassettes used with the apparatus of the present invention are easily removably mounted such that they can be replaced in a straightforward manner when strip material spooled thereon is exhausted. As will be readily understood a cassette is an apparatus on which a length of strip material can be spooled onto and unspooled from. The skilled person will be aware of suitable cassettes that can be used with the present invention.
Apparatus according to the present invention may operate with only a single cassette of strip material, such that a length of pipeline is formed from a single length of helically wound strip material. However, it may be preferable that the apparatus comprises mountings for two or more cassettes of strip material and the apparatus is capable of being used with two or more cassettes of strip material, such that a length of pipeline is formed from two or more lengths of helically wound strip material. That is, the apparatus of the present invention may have two, three, four, or more mountings for cassettes of strip materials mounted on the body.
Each mounting for a cassette is preferably provided with at least one associated forming roller mounted on the body in an appropriate positioned such that strip material unwound from a cassette mounted on the mounting may pass through the or each associated forming roller before being wound about a mandrel to form a pipeline. Each mounting may be provided with the same number of associated forming rollers mounted on the body such that strip material from each cassette passes through the same number of forming rollers before being wound on a mandrel. Alternatively, different mountings may have different numbers of associated forming rollers such that two or more different cassettes have a different number of associated forming rollers.
In embodiments of the invention the apparatus may comprise a second mounting for a second cassette of strip material on the body; and a fifth forming roller mounted on the body; wherein: the fifth forming roller and second mounting are arranged so that strip material unwound from a second cassette positioned on the second mounting can be passed directly through the second forming roller before any further processing occurs It is to be understood that if an apparatus according to the present invention comprises a "fifth" forming roller it need not necessarily comprise five forming rollers. Rather the "fifth" forming roller is an arbitrary name used to differentiate from the second, third, and fourth forming rollers described above. For example, an apparatus according to the present invention may comprise only two forming rollers: a first forming roller and a fifth forming roller. The naming of the sixth, seventh, and eighth forming rollers described below is similarly arbitrary.
An apparatus according to the present invention that comprises a fifth forming roller may further comprise a sixth forming roller mounted on the body adjacent the fifth forming roller such that strip material passing through the fifth forming roller can be immediately subsequently passed through the sixth forming roller before any further processing occurs.
An apparatus according to the present invention that comprises a sixth forming roller may further comprise a seventh forming roller mounted on the body adjacent the sixth forming roller such that strip material passing through the sixth forming roller can be immediately subsequently passed through the seventh forming roller before any further processing occurs.
An apparatus according to the present invention that comprises a seventh forming roller may further comprise an eighth forming roller mounted on the body adjacent the seventh forming roller such that strip material passing through the seventh forming roller can be immediately subsequently passed through the eighth forming roller before any further processing occurs.
If the apparatus of the present invention comprises a second mounting it may also comprise a second cassette of strip material mounted on the second mounting The apparatus of the present invention is particularly suitable for forming pipeline from helically wound and overlapping strips of material, wherein the strip material is deformed to have one or more longitudinally extending ridges as described in the prior art. Therefore, is is advantageous for apparatus according to the present invention that the forming roller(s) is(are) operable to plastically deform flat strip material unwound from a cassette to provide one or more longitudinally extending ridges in the strip material, for example two or more longitudinally extending ridges may be provided in the strip material. Longitudinally extending ridges may be formed in any manner known to the skilled person, for example longitudinally extending ridges may be asymmetric as described in the prior art.
Each forming roller may be formed in any manner known to the skilled person They may be driven to pull strip material therethrough. As discussed above Multiple forming rollers may be necessary to suitably deform strip material into an appropriate shape.
The apparatus may additional comprise one or more appropriately positioned exit rollers located after any forming rollers in order to direct strip material exiting the forming rollers.
The apparatus may also additionally comprise one or more wrapping rollers located at or near a mandrel to locate the strip on the mandrel when the apparatus is in use.
The present invention also provides of operating the apparatus of the present invention to form a length of pipeline. The method comprises the steps of: positioning a cylindrical mandrel through the central aperture of the apparatus; progressing strip material from a cassette mounted on a mounting through at least one forming roller; and wrapping the cylindrical mandrel in the strip material progressed through a forming 113 roller by rotating the body about the cylindrical mandrel whilst progressing the mandrel through the aperture The mandrel may form part of the final length of pipeline as an internal liner or may be removed after forming of the length of the pipeline such that the length of pipeline solely consists of wrapped strip material The rate of rotation of the body and/or the rate of progression of the mandrel relative to the boy may be controlled to ensure that the strip material is wound about the mandrel in an appropriate manner. For example, the rate of rotation of the body and/or the rate of progression of the mandrel may be controlled to ensure that lengths of strip material overlay each other and/or longitudinal ridges (or any other feature formed by the rollers) in the strip material interlock or are otherwise appropriately relatively positioned as the strip material is wound about the mandrel.
Further features and advantages of the present invention will be apparent from the preferred embodiment that is shown in the Figures and is described below.
Drawings Figure I is a front view of part of an embodiment of an apparatus according to the present invention; and Figure 2 is a perspective view of the embodiment of Figure 1 An apparatus 1 for forming pipeline according to the present invention is shown in the Figures. The apparatus 1 comprises a body 2 with a central aperture 3 formed therethrough. A first mounting 4 is provided for a first cassette (not shown) carrying a first strip 5 of martensitic stainless steel. A second mounting 6 is provided for a second cassette (not shown) carrying a second strip 7 of martensitic strip steel. A first forming roller 8, a second forming roller 9, a third forming roller 10, and a fourth forming roller 11 are mounted on a first platform 12 affixed to the body 2 and are arranged such that the first strip 5 passes through each of the first, second, third, and fourth forming rollers 8, 9, 10, 11 in turn. A first exit roller 13 is positioned after the fourth forming roller 11 to direct the first strip 5 towards the central aperture 3.
A fifth forming roller 14, a sixth forming roller 15, a seventh forming roller 16, and an eighth forming roller 17 are mounted on a second platform 18 affixed to the body and are arranged such that the second strip 7 passes through each of the fifth, sixth, seventh, and eighth forming rollers 14, 15, 16, 17 in turn. A second exit roller 19 is positioned after the eighth forming roller 17 to direct the second strip 7 towards the central aperture When in use a cylindrical mandrel 20 is positioned centrally through the central aperture 3 of the body 2 and the first strip 5 and the second strip 7 are helically wound about the mandrel 20 to form a pipeline.
The apparatus 1 operates in the following manner. The first cassette is mounted on the first mounting 4 and the second cassette is mounted on the second mounting 6. The first strip 5 is then pulled through the first forming roller 8, the second forming roller 9, the third forming roller 10, the fourth forming roller 11, and the first exit roller 13 and an end of the first strip 5 affixed to the mandrel 20. The second cassette is mounted on the second mounting 6. The second strip? is then pulled through the fifth forming roller 14, the sixth forming roller 15, the seventh forming roller 16, the eighth forming roller 17, and the second exit roller 19 and an end of the second strip 7 affixed to the mandrel 20.
The body 2 is then driven to rotate about the mandrel 20 as the mandrel is progressed through the central aperture 3 relative to the body. The first, second, third, and fourth forming rollers 8, 9, 10, 11 act to form the first strip 5 to provide asymmetric longitudinal ridges 21 in the first strip before it is wrapped about the mandrel 20. The fifth, sixth, seventh, and eighty forming rollers 14, 15, 16, 17 act to form the second strip 7 to provide asymmetric longitudinal ridges 21 in the second strip before it is wrapped about the mandrel. The longitudinal ridges 21 are formed to have the shape disclosed in GB2496137.
By rotating the body 2 about the mandrel 20 and progressing the mandrel through the central aperture the first strip 5 and the second strip 7 are helically wound about the mandrel to form a length of pipeline. The rate of progression of the mandrel 20 and the rate of rotation of the body 2 are controlled to ensure that the longitudinal ridges 21 of the first strip 5 and the second strip 7 overlap and interlock with one another to form a rigid and robust pipeline, as disclosed in 6B2496137, Unless otherwise indicated by context or the claims any feature of the embodiment of the invention shown in the drawings can be included in an embodiment of the invention independently from any other feature.

Claims (13)

  1. Claims 1 An apparatus for forming a pipeline from strip material comprising: a body having a central aperture; a first forming roller mounted on the body; a first mounting for a first cassette of strip material on the body; and a drive for rotating the body about the central aperture; wherein: the first forming roller and first mounting are arranged so that strip material unwound from a first cassette positioned on the first mounting can be passed directly through the first forming roller before any further processing occurs.
  2. 2 An apparatus according to claim 1 further comprising: a second forming roller mounted on the body adjacent the first forming roller such that strip material passing through the first forming roller can be immediately subsequently passed through the second forming roller before any further processing occurs.
  3. 3 An apparatus according to claim 2, further comprising: a third forming roller mounted on the body adjacent the second forming roller such that strip material passing through the second forming roller can be immediately subsequently passed through the third forming roller before any further processing occurs.
  4. 4 An apparatus according to claim 3, further comprising: a fourth forming roller mounted on the body adjacent the third forming roller such that strip material passing through the third forming roller can be immediately subsequently passed through the fourth forming roller before any further processing occurs.
  5. An apparatus according to any preceding claim further comprising a first cassette mounted on the first mounting.
  6. 6 An apparatus according to any preceding claim further comprising: a second mounting for a second cassette of strip material on the body; and a fifth forming roller mounted on the body; wherein: 7 8 the fifth forming roller and second mounting are arranged so that strip material unwound from a second cassette positioned on the second mounting can be passed directly through the second forming roller before any further processing occurs.
  7. An apparatus according to claim 6 further comprising: a sixth forming roller mounted on the body adjacent the fifth forming roller such that strip material passing through the fifth forming roller can be immediately subsequently passed through the sixth forming roller before any further processing occurs.
  8. An apparatus according to claim 7, further comprising: a seventh forming roller mounted on the body adjacent the sixth forming roller such that strip material passing through the sixth forming roller can be immediately subsequently passed through the seventh forming roller before any further processing occurs.
  9. An apparatus according to claim 8, further comprising: an eighth forming roller mounted on the body adjacent the seventh forming roller such that strip material passing through the seventh forming roller can be immediately subsequently passed through the eighth forming roller before any further processing occurs.
  10. 10. An apparatus according to any of claims six to nine further comprising a second cassette of strip material mounted on the second mounting
  11. 11 An apparatus according to any preceding claim, wherein the forming roller(s) are operable to plastically deform strip material to provide two or more longitudinally extending ridges in the strip material
  12. 12. An apparatus according to claim 11, wherein the longitudinally extending ridges are asymmetric.
  13. 13. A method of forming a length of pipeline using the apparatus according to any preceding claim comprising the steps of positioning a cylindrical mandrel through the central aperture of the apparatus; progressing strip material from a cassette mounted on a mounting through at least one forming roller; and wrapping the cylindrical mandrel in the strip material progressed through a forming roller by rotating the body about the cylindrical mandrel whilst progressing the mandrel through the aperture.
GB2206165.9A 2022-04-28 2022-04-28 Apparatus for forming a Pipeline Pending GB2618117A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2206165.9A GB2618117A (en) 2022-04-28 2022-04-28 Apparatus for forming a Pipeline

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2206165.9A GB2618117A (en) 2022-04-28 2022-04-28 Apparatus for forming a Pipeline

Publications (2)

Publication Number Publication Date
GB202206165D0 GB202206165D0 (en) 2022-06-15
GB2618117A true GB2618117A (en) 2023-11-01

Family

ID=81943939

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2206165.9A Pending GB2618117A (en) 2022-04-28 2022-04-28 Apparatus for forming a Pipeline

Country Status (1)

Country Link
GB (1) GB2618117A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB110576A (en) * 1916-10-23 1917-10-23 Stephen James Murphy Improvements relating to Machines for Making Flexible Metallic Pipes and Piping.
US4597276A (en) * 1983-12-06 1986-07-01 Coflexip Apparatus for making helically wound interlocked tubular structure
EP0199557A2 (en) * 1985-04-20 1986-10-29 T.I. Flexible Tubes Limited Apparatus for forming a non-rotating metal strip helix
US5669420A (en) * 1990-07-27 1997-09-23 Coflexip Casing and flexible tubular conduit comprising such a casing and process for producing it
WO2010082058A1 (en) * 2009-01-16 2010-07-22 Iti Scotland Limited Apparatus for and method of manufacturing a helically wound tubular structure
WO2013055618A1 (en) * 2011-10-11 2013-04-18 Bartell Machinery Systems Llc Flexible pipe carcass forming apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB110576A (en) * 1916-10-23 1917-10-23 Stephen James Murphy Improvements relating to Machines for Making Flexible Metallic Pipes and Piping.
US4597276A (en) * 1983-12-06 1986-07-01 Coflexip Apparatus for making helically wound interlocked tubular structure
EP0199557A2 (en) * 1985-04-20 1986-10-29 T.I. Flexible Tubes Limited Apparatus for forming a non-rotating metal strip helix
US5669420A (en) * 1990-07-27 1997-09-23 Coflexip Casing and flexible tubular conduit comprising such a casing and process for producing it
WO2010082058A1 (en) * 2009-01-16 2010-07-22 Iti Scotland Limited Apparatus for and method of manufacturing a helically wound tubular structure
WO2013055618A1 (en) * 2011-10-11 2013-04-18 Bartell Machinery Systems Llc Flexible pipe carcass forming apparatus

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Publication number Publication date
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