WO2008097095A1 - A method and a device for securing a structure - Google Patents

A method and a device for securing a structure Download PDF

Info

Publication number
WO2008097095A1
WO2008097095A1 PCT/NO2008/000025 NO2008000025W WO2008097095A1 WO 2008097095 A1 WO2008097095 A1 WO 2008097095A1 NO 2008000025 W NO2008000025 W NO 2008000025W WO 2008097095 A1 WO2008097095 A1 WO 2008097095A1
Authority
WO
WIPO (PCT)
Prior art keywords
base
contact surfaces
vessel
contact surface
complementary
Prior art date
Application number
PCT/NO2008/000025
Other languages
French (fr)
Inventor
Eirik Engevik
Ivar Holta
Viktor Nilsen-Nygaard
Terje Lunde
Original Assignee
Aker Kværner Offshore Partner As
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 Aker Kværner Offshore Partner As filed Critical Aker Kværner Offshore Partner As
Priority to GB0913087A priority Critical patent/GB2461413B/en
Publication of WO2008097095A1 publication Critical patent/WO2008097095A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/003—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for for transporting very large loads, e.g. offshore structure modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P7/00—Securing or covering of load on vehicles
    • B60P7/06—Securing of load
    • B60P7/08—Securing to the vehicle floor or sides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/24—Means for preventing unwanted cargo movement, e.g. dunnage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B2231/00—Material used for some parts or elements, or for particular purposes
    • B63B2231/40—Synthetic materials
    • B63B2231/42—Elastomeric materials
    • B63B2231/44—Rubber

Definitions

  • This invention relates to a method and a device for securing cargo. More particularly, it concerns a method and a device for preventing a structure from unintentionally sliding on its base so as to be displaced during transport.
  • the invention is suitable in connection with transport of heavy structures, such as in connection with sea transport of an offshore structure.
  • a cargo item has at least one surface arranged to rest on a complementary surface on the base .
  • the method comprises making one of the surfaces, or one or more areas thereof, of a harder material than that of the complementary surface .
  • the hard surface may be associated with the cargo item, in which case a complementary surface is associated with the base made of a softer material .
  • the hard surface may be associated with the base, in which case a complementary surface is associated with the cargo item made of a softer material.
  • the device comprises embodiments of suitable surfaces.
  • the offshore structure When transporting a large and heavy structure, such as an offshore structure, on a vessel, the offshore structure is placed on the vessel deck or on a grillage fastened to the
  • Sea-fastening may 5 comprise straps, stays and welded connections between the structure and the vessel, or between the structure and the grillage, or both.
  • An offshore structure, or a part of an offshore structure may weigh several thousand tonnes.
  • Sea-fastening of a largeo and heavy structure by means of prior art is extensive, time- consuming and costly.
  • the time used for sea-fastening may represent a limiting factor given the dependency on good conditions while the sea fastening is being made or removed. In manys places this implies that sea transport of this type may only be carried out within a relatively short period of the year.
  • the object of the invention is to remedy or reduce at least one of the disadvantages of the prior art.
  • a method in accordance with the invention is characterised in that it comprises the steps of : arranging complementary contact surfaces on the structure and on the base; making,5 wholly or partially, one of the contact surfaces of a harder material than that of the complementary contact surface; placing the structure in a manner allowing it to rest on the base upon contact between complementary surfaces .
  • a device in accordance with the invention is characterised ino that the hard surface is corrugated, or is comprised of spikes, metallic or ceramic granules or other projecting elements arranged to penetrate into the complementary contact surface.
  • a contact surface may be provided directly in the structure and/or the base.
  • a contact surface may be provided on an element, such as a plate, which is secured to the structure or the base.
  • a contact surface may also be provided as a coating in the form of an adhesive or a moulding material applied to the structure or the base, and hard granules may be mixed into the adhesive/moulding material to achieve the desired effect against the complementary contact surface. It may be appropriate to combine various embodiments.
  • Sea-fastening according to prior art known per se may be used in addition to the coating according to the invention, for example when the offshore structure is located on the vessel and the centre of gravity of the offshore structure is sufficiently high above the vessel for the stability of the offshore structure to become unsafe.
  • a method and device according to the invention provides a connection between the vessel and the offshore structure that allows for immediate transport of the offshore structure to shore after having placed the offshore structure on the vessel. This considerably increases the periods of the year possible for carrying out works of this type.
  • Fig. 1 shows a vessel comprising a grillage having contact surfaces formed in accordance with the invention
  • Fig. 2 shows the vessel after having placed an offshore structure on the grillage
  • Pig. 3 shows, in larger scale, a section of the grillage having a contact surface provided with a first coating in the form of a metal plate assigned a machined pyramid pattern;
  • Fig. 4 shows, in a somewhat larger scale, a first frame of fig. 1;
  • Fig. 5 shows, in larger scale, a section of the grillage having the contact surface provided with a first coating in the form of rubber portions;
  • Fig. 6 shows, in larger scale, a section of the offshore structure, viewed from below and upwards, having the contact surface provided with a second coating.
  • reference numeral 1 indicates a vessel provided with a first frame 2 and a second frame 4, in which both frames 2 , 4 are provided with a number of contact surfaces 6 arranged so as to be able to receive a structure 8, typically an offshore structure.
  • the vessel 1, the first frame 2 and the second frame 4 form a base.
  • the contact surfaces 6 are provided with a first coating 10, see fig. 3, which in this preferred embodiment comprises a steel plate 12, the surface of which is provided with a waffle pattern.
  • the waffle pattern provides a relatively large number of protrusions 14 in the form of pyramids protruding outwards from the steel plate 12.
  • the protrusions 12 have been given a hardness and sharpness causing the protrusions to penetrate into the material of the offshore structure 8 at the complementary contact surfaces 18 of the offshore structure 8 when placing the structure 8 on the contact surfaces 6.
  • the coating 10 comprises rubber portions 16, see fig. 5.
  • the contact surfaces 18 of the structure 8 are provided with a second coating 20 comprised of a mixture of sharp-edged granulate and epoxy.
  • the mixture has been applied to the contact surfaces 18 of the offshore structure 8, and it has been hardened in areas where it will bear against the respective contact surfaces 6.
  • the granulate Upon placing the structure 8 on the contact surfaces 6, the granulate will deform the rubber portions 16 and thereby cause the structure 8 to be prevented from being able to displace itself relative to the vessel 1.

Abstract

A method and a device for securing a structure (8) from unintentionally being displaced onboard a vessel (1) after having placed the structure (8) on the vessel (1), the method comprising the steps of : arranging complementary contact surfaces (6, 18) on the structure (8) and the base (1, 2, 4); making, wholly or partially, one of the contact surfaces (6, 18) of a harder material than that of the complementary contact surface (6, 18); placing the structure (8) in a manner allowing it to rest on the base (1, 2, 4) upon contact between the complementary contact surfaces (6, 18).

Description

A METHOD AND A DEVICE FOR SECURING A STRUCTURE
This invention relates to a method and a device for securing cargo. More particularly, it concerns a method and a device for preventing a structure from unintentionally sliding on its base so as to be displaced during transport.
The invention is suitable in connection with transport of heavy structures, such as in connection with sea transport of an offshore structure. A cargo item has at least one surface arranged to rest on a complementary surface on the base .
The method comprises making one of the surfaces, or one or more areas thereof, of a harder material than that of the complementary surface . The hard surface may be associated with the cargo item, in which case a complementary surface is associated with the base made of a softer material . The hard surface may be associated with the base, in which case a complementary surface is associated with the cargo item made of a softer material. The device comprises embodiments of suitable surfaces.
When transporting a large and heavy structure, such as an offshore structure, on a vessel, the offshore structure is placed on the vessel deck or on a grillage fastened to the
vessel. It is customary to fasten the offshore structure to the vessel by means of so-called sea-fastening to prevent the offshore structure from displacing on the vessel due to e.g. bad weather. Sea-fastening according to prior art may 5 comprise straps, stays and welded connections between the structure and the vessel, or between the structure and the grillage, or both.
An offshore structure, or a part of an offshore structure, may weigh several thousand tonnes. Sea-fastening of a largeo and heavy structure by means of prior art is extensive, time- consuming and costly. In waters having changing weather- and sea conditions, the time used for sea-fastening may represent a limiting factor given the dependency on good conditions while the sea fastening is being made or removed. In manys places this implies that sea transport of this type may only be carried out within a relatively short period of the year.
The object of the invention is to remedy or reduce at least one of the disadvantages of the prior art.
The object is achieved in accordance with the invention ando by virtue of features disclosed in the following description and in the subsequent claims .
A method in accordance with the invention is characterised in that it comprises the steps of : arranging complementary contact surfaces on the structure and on the base; making,5 wholly or partially, one of the contact surfaces of a harder material than that of the complementary contact surface; placing the structure in a manner allowing it to rest on the base upon contact between complementary surfaces .
A device in accordance with the invention is characterised ino that the hard surface is corrugated, or is comprised of spikes, metallic or ceramic granules or other projecting elements arranged to penetrate into the complementary contact surface.
A contact surface may be provided directly in the structure and/or the base. Alternatively, a contact surface may be provided on an element, such as a plate, which is secured to the structure or the base. A contact surface may also be provided as a coating in the form of an adhesive or a moulding material applied to the structure or the base, and hard granules may be mixed into the adhesive/moulding material to achieve the desired effect against the complementary contact surface. It may be appropriate to combine various embodiments.
Sea-fastening according to prior art known per se may be used in addition to the coating according to the invention, for example when the offshore structure is located on the vessel and the centre of gravity of the offshore structure is sufficiently high above the vessel for the stability of the offshore structure to become unsafe.
A method and device according to the invention provides a connection between the vessel and the offshore structure that allows for immediate transport of the offshore structure to shore after having placed the offshore structure on the vessel. This considerably increases the periods of the year possible for carrying out works of this type.
Hereinafter an example of a preferred method and embodiment is described and is illustrated in the enclosed drawings, where :
Fig. 1 shows a vessel comprising a grillage having contact surfaces formed in accordance with the invention; Fig. 2 shows the vessel after having placed an offshore structure on the grillage;
Pig. 3 shows, in larger scale, a section of the grillage having a contact surface provided with a first coating in the form of a metal plate assigned a machined pyramid pattern;
Fig. 4 shows, in a somewhat larger scale, a first frame of fig. 1;
Fig. 5 shows, in larger scale, a section of the grillage having the contact surface provided with a first coating in the form of rubber portions; and
Fig. 6 shows, in larger scale, a section of the offshore structure, viewed from below and upwards, having the contact surface provided with a second coating.
In the drawings, reference numeral 1 indicates a vessel provided with a first frame 2 and a second frame 4, in which both frames 2 , 4 are provided with a number of contact surfaces 6 arranged so as to be able to receive a structure 8, typically an offshore structure. The vessel 1, the first frame 2 and the second frame 4 form a base.
The contact surfaces 6 are provided with a first coating 10, see fig. 3, which in this preferred embodiment comprises a steel plate 12, the surface of which is provided with a waffle pattern. The waffle pattern provides a relatively large number of protrusions 14 in the form of pyramids protruding outwards from the steel plate 12. The protrusions 12 have been given a hardness and sharpness causing the protrusions to penetrate into the material of the offshore structure 8 at the complementary contact surfaces 18 of the offshore structure 8 when placing the structure 8 on the contact surfaces 6. In an alternative embodiment, the coating 10 comprises rubber portions 16, see fig. 5.
The contact surfaces 18 of the structure 8 are provided with a second coating 20 comprised of a mixture of sharp-edged granulate and epoxy. The mixture has been applied to the contact surfaces 18 of the offshore structure 8, and it has been hardened in areas where it will bear against the respective contact surfaces 6.
Upon placing the structure 8 on the contact surfaces 6, the granulate will deform the rubber portions 16 and thereby cause the structure 8 to be prevented from being able to displace itself relative to the vessel 1.

Claims

C l a i m s
1. A method for securing a structure (8) from unintentionally being displaced onboard a vessel (1) after having placed the structure on the vessel (1) , c h a r a c t e r i z e d i n that the method comprises the steps of : arranging complementary contact surfaces (6, 18) on the structure (8) and the base (I7 2, 4) ; making, wholly or partially, one of the contact surfaces (6, 18) of a harder material than that of the complementary contact surface (6, 18) ; placing the structure (8) in a manner allowing it to rest on the base (1, 2, 4) upon contact between the complementary contact surfaces (6, 18); and - ensuring that at least one corrugation, one granule or another element on the one contact surface (6, 18) penetrates into the other contact surface (6, 18) .
2. A device for fastening a structure (8) to a vessel (1), wherein the structure (8) is placed on a base (I7 2, 4), c h a r a c t e r i z e d i n that the structure (8) rests on the base (I7 2, 4) via complementary contact surfaces (6, 18) , and wherein one of the contact surfaces (6, 18) is made, wholly or partially, of a harder material than that of the complementary contact surface (6, 18), at least one corrugation, one granule or another element on the one contact surface (6, 18) being arranged so as to be able to penetrate into the other contact surface (6, 18) .
3. The device according to claim 2 , c h a r a c t e r i z e d i n that the contact surface
(6, 18) is formed directly in the structure (8) and/or in the base (1, 2, 4) .
4. The device according to claim 2 , c h a r a c t e r i z e d i n that one of the contact surfaces (6, 18) is comprised of an element, such as a plate (12) , fastened to the structure (8) or to the base (1, 2, 4) .
5. The device according to claim 3, c h a r a c t e r i z e d i n that one of the contact surfaces (6, 18) comprises a coating (10, 20) in the form of an adhesive or a moulding material applied to the structure (8) or to the base (1, 2, 4), and wherein hard granulated granules are mixed into the adhesive or the moulding material .
6. The device according to claim 2, c h a r a c t e r i z e d i n that the structure (8) is kept still relative to the vessel (1) by means of at least friction or engagement between the contact surfaces (6, 18) .
PCT/NO2008/000025 2007-02-06 2008-01-25 A method and a device for securing a structure WO2008097095A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0913087A GB2461413B (en) 2007-02-06 2008-01-25 A method and a device for securing a structure

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20070683A NO336179B1 (en) 2007-02-06 2007-02-06 Method and apparatus for securing a structure
NO20070683 2007-02-06

Publications (1)

Publication Number Publication Date
WO2008097095A1 true WO2008097095A1 (en) 2008-08-14

Family

ID=39681909

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2008/000025 WO2008097095A1 (en) 2007-02-06 2008-01-25 A method and a device for securing a structure

Country Status (3)

Country Link
GB (1) GB2461413B (en)
NO (1) NO336179B1 (en)
WO (1) WO2008097095A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10232916B1 (en) * 2016-03-10 2019-03-19 Peck & Hale, L.L.C. Barge chocking system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861541A (en) * 1969-02-03 1975-01-21 George H Taft Intermodal unitized cargo control system
GB2156743A (en) * 1984-04-02 1985-10-16 Taylor Woodrow Const Ltd Bridges
DE3502835A1 (en) * 1985-01-29 1986-07-31 Dietrich von Dipl.-Ing. 7000 Stuttgart Berg Method for increasing the coefficient friction between identical and non-identical materials in goods for transport
US5131709A (en) * 1989-06-13 1992-07-21 The 2500 Corp. Cargo bed liner system
US5549428A (en) * 1991-08-06 1996-08-27 Yeatts; Ben R. Truck bed liner anti-skid device
US6702532B1 (en) * 1999-07-26 2004-03-09 Throener James A Cargo restraining device
GB2440131A (en) * 2006-07-14 2008-01-23 W H Aspect Ltd Securing a wheelchair or other object to a vehicle

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861541A (en) * 1969-02-03 1975-01-21 George H Taft Intermodal unitized cargo control system
GB2156743A (en) * 1984-04-02 1985-10-16 Taylor Woodrow Const Ltd Bridges
DE3502835A1 (en) * 1985-01-29 1986-07-31 Dietrich von Dipl.-Ing. 7000 Stuttgart Berg Method for increasing the coefficient friction between identical and non-identical materials in goods for transport
US5131709A (en) * 1989-06-13 1992-07-21 The 2500 Corp. Cargo bed liner system
US5549428A (en) * 1991-08-06 1996-08-27 Yeatts; Ben R. Truck bed liner anti-skid device
US6702532B1 (en) * 1999-07-26 2004-03-09 Throener James A Cargo restraining device
GB2440131A (en) * 2006-07-14 2008-01-23 W H Aspect Ltd Securing a wheelchair or other object to a vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10232916B1 (en) * 2016-03-10 2019-03-19 Peck & Hale, L.L.C. Barge chocking system

Also Published As

Publication number Publication date
NO336179B1 (en) 2015-06-08
GB2461413A (en) 2010-01-06
NO20070683L (en) 2008-08-07
GB0913087D0 (en) 2009-09-02
GB2461413B (en) 2011-04-27

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