EP0856464A1 - Conversion of single to double hull - hull-up technique - Google Patents
Conversion of single to double hull - hull-up technique Download PDFInfo
- Publication number
- EP0856464A1 EP0856464A1 EP97300560A EP97300560A EP0856464A1 EP 0856464 A1 EP0856464 A1 EP 0856464A1 EP 97300560 A EP97300560 A EP 97300560A EP 97300560 A EP97300560 A EP 97300560A EP 0856464 A1 EP0856464 A1 EP 0856464A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hull
- vessel
- conversion
- section
- shell
- 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.)
- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B83/00—Rebuilding or retrofitting vessels, e.g. retrofitting ballast water treatment systems
- B63B83/10—Rebuilding or retrofitting vessels, e.g. retrofitting ballast water treatment systems for increasing cargo capacity
Definitions
- This invention relates to a method of conversion of a single hull vessel to a double hull vessel.
- the method of conversion of a vessel may use a ship-lift system; alternatively, the method may be carried out in a dry dock.
- the section of second hull shell is lowered on a lifting means and the vessel is positioned above the lifting means.
- the lifting means may thereafter be raised to bring the section of second hull shell into a position adjacent the first hull of the vessel.
- the locating of the section of second hull shell in relation to the first hull may be by means of a locating means such as male and female locating members disposed on adjacent portions of the first and second hulls.
- the lifting means lifts the combined vessel and section of second hull to a site for addition of remaining sections of the second hull and treatment.
- the second hull shell has transverse ribs for providing strength to the double hull.
- the first hull may be an existing outer hull of a vessel, said vessel being converted to a double hull vessel.
- ballast tanks can be placed within the second hull.
- Existing ballast tanks within the first hull may be converted to cargo tanks.
- a method of conversion of a vessel is described, in particular for adding a second hull 4 to a vessel 1 with a single existing hull 2 (see Fig. 3 and Figs. 9a and 9b).
- the method can be used in a dry dock or by using a ship-lifting system.
- the ship-lifting system has the advantage of a quicker assembly time thereby being advantageous to shipowners who have their ships out of service for a shorter period.
- the method involves the following steps.
- the vessel 1 is identified for conversion to a double hull vessel and all the key drawings for the vessel 1 are obtained from the shipowner or drawn up to provide details of the general arrangement and construction profile, the shell expansion, capacity plan, lines and offset and the piping arrangement.
- the vessel 1 may need to be brought to the shipyard for detailed checking of the vessel profile and to verify all critical dimensions.
- the main bottom section of second hull 4, side sections 18 and end sections 20 are fabricated as steel structures based on the drawings (see Figs. 4a. 4b and 8b).
- the bottom section of second hull 4 has sets of female locating members 8 attached to correspond with male locating members 6 on the vessel 1.
- Corresponding male locating members 6 (See Fig. 2) are added to the exterior of the existing first hull 2 of the vessel 1.
- the male and female locating members 6, 8 facilitate precise positioning of the bottom section of second hull 4 in relation to the first hull 2 of the vessel 1.
- the bottom section of second hull 4 has parallel transverse ribs 10 normal to the direction of the keel 22 of the vessel 1.
- the ribs 10 strengthen the section of the second hull 4 and provide rigidity (see Fig. 1).
- the side sections of second hull 18 are hollow blocks and the end sections of second hull 20 are tapered hollow blocks (see Fig. 8b).
- New pipes and other fittings are prefabricated for fitting in new double bottom tanks which will be ballast tanks between the first and second hulls 2, 4. Any original ballast tanks within the first hull 2 of the bottom vessel 1 are converted to cargo tanks.
- the sections 18, 20 of the second hull 4 are blasted and painted. This completes the preparation that can be carried out without having the vessel 1 out of commission (see Figs. 4a, 4b and 8b).
- the vessel 1 is docked and lifted by a ship lift 12 and transferred to a land berth.
- the vessel 1 could be docked in a dry dock (see Fig. 6a).
- the existing external shell 19 of the first hull 2 of the vessel 1 is completely blasted and painted with a primer (see Fig. 9a and 9b).
- the male locating members 6 are fitted onto the bottom plate of the first hull 2 of the vessel 1.
- the vessel 1 is transferred from the land berth to the ship lift platform, lowered and floated. Alternatively, if the dry dock system is being used, the vessel 1 is floated and removed from the dry dock.
- the main bottom section of second hull 4 which has been prefabricated as described above, is assembled on the land berth over suitable cradles and bogies.
- the section of second hull 4 is transferred to the platform 14 of the ship lift 12 and the platform 14 is lowered into the sea (see Figs. 4a and 4b).
- the vessel 1 is docked over the platform 14 of the ship lift 12 ensuring sufficient clearance between the vessel's first hull 2 and the section of second hull 4 on the platform 14.
- the platform 14 is then raised by the ship lift 12 so that the male locating members 6 on the first hull 2 fit accurately into the female locating members 8.
- the section of second hull 4 is supported on blocks.
- the dry dock can be flooded in order to allow the vessel 1 to be positioned over the second hull 4.
- the dry dock can be drained for further work on the vessel 1 as described below.
- first hull 2 and the interior of the bottom section of second hull 4 are thoroughly washed with fresh water and the first and second hulls 2, 4 are welded together.
- a number, in this example four, of side sections of second hull 18 in the form of hollow blocks having a double skin shell structure are positioned on each side of the vessel 1 adjacent the first hull 2 and above the bottom section of the second hull 4, by yard cranes (see Figs. 6a and 6b).
- End sections 20 of the second hull 4 are also positioned on the vessel 1 and these have a tapered profile at the forward and aft ends of the vessel 1 in order to ensure that the first hull 2, bottom section of second hull 4 and side sections 18 of second hull 4 are jointed smoothly.
- the vessel 1 with its double hull is transferred to the platform 14 of the ship lift 12 and lowered into the sea. If the dry dock system is being used, the dry dock is flooded and the vessel 1 floated (see Fig. 7b).
- the entire vessel systems are tested and a sea trial conducted.
- the resulting double hull vessel has a first hull 2 which is the existing hull of the vessel 1, with a bottom section of second hull 4 located to the first hull 2 by male and female locating members 6, 8 between the two, the second hull is then attached by welding.
- a number of double skinned side sections 18 of second hull 4 are disposed along the sides of the vessel 1 with tapered end sections 20 of second hull 4 at each forward and aft position.
Landscapes
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
Claims (11)
- A method of conversion of a vessel comprising the steps of:a) positioning a section of a second hull shell beneath a first hull of a vessel;b) raising the section of second hull shell to locate it adjacent the first hull;c) attaching the section of second hull shell to the first hull.
- A method of conversion of a vessel as claimed in claim 1, wherein a ship-lift system is used.
- A method of conversion of a vessel as claimed in claim 1, wherein the method is carried out in a dry dock.
- A method of conversion of a vessel as claimed in any one of claims 1 to 3, wherein the section of second hull shell is lowered on a lifting means and the vessel is positioned above the lifting means.
- A method of conversion of a vessel as claimed in claim 4, wherein the lifting means is raised to bring the section of second hull shell into a position adjacent the first hull of the vessel.
- A method of conversion of a vessel as claimed in any one of the preceding claims, wherein the section of second hull shell is located in relation to the first hull by means of a locating means such as male and female locating members disposed on adjacent portions of the first and second hulls.
- A method of conversion of a vessel as claimed in any one of claims 4 to 6, wherein the lifting means lifts the combined vessel and section of second hull to a site for addition of remaining sections of the second hull and treatment.
- A method of conversion of a vessel as claimed in any one of the preceding claims, wherein the second hull has transverse ribs for providing strength to the double shell hull.
- A method of conversion of a vessel as claimed in any one of the preceding claims, wherein the first hull is an existing outer hull of a vessel, said vessel being converted to a double hull vessel.
- A method of conversion of a vessel as claimed in any one of the preceding claims, wherein ballast tanks are placed within the second hull.
- A method of conversion of a vessel as claimed in claim 10, wherein existing ballast tanks within the first hull may be converted to cargo tanks.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97300560A EP0856464A1 (en) | 1997-01-29 | 1997-01-29 | Conversion of single to double hull - hull-up technique |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97300560A EP0856464A1 (en) | 1997-01-29 | 1997-01-29 | Conversion of single to double hull - hull-up technique |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0856464A1 true EP0856464A1 (en) | 1998-08-05 |
Family
ID=8229197
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97300560A Withdrawn EP0856464A1 (en) | 1997-01-29 | 1997-01-29 | Conversion of single to double hull - hull-up technique |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0856464A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102745307A (en) * | 2012-06-29 | 2012-10-24 | 深圳市海斯比船艇科技股份有限公司 | Manufacturing method of ship and ship manufactured by using same |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3978807A (en) * | 1974-03-16 | 1976-09-07 | Aktiengesellschaft "Weser" | Offshore station and method of maintaining the same |
JPH03159895A (en) * | 1989-11-20 | 1991-07-09 | Ishikawajima Harima Heavy Ind Co Ltd | Hull modifying method for tanker |
WO1992010396A1 (en) * | 1990-12-05 | 1992-06-25 | William Stuart | Watercraft hull modification |
US5189975A (en) * | 1992-05-01 | 1993-03-02 | Mobil Oil Corporation | Method for reconfiguration tankers |
WO1994026585A1 (en) * | 1993-05-18 | 1994-11-24 | Special Projects Research Corp. | Method and device for the installation of double hull protection |
-
1997
- 1997-01-29 EP EP97300560A patent/EP0856464A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3978807A (en) * | 1974-03-16 | 1976-09-07 | Aktiengesellschaft "Weser" | Offshore station and method of maintaining the same |
JPH03159895A (en) * | 1989-11-20 | 1991-07-09 | Ishikawajima Harima Heavy Ind Co Ltd | Hull modifying method for tanker |
WO1992010396A1 (en) * | 1990-12-05 | 1992-06-25 | William Stuart | Watercraft hull modification |
US5189975A (en) * | 1992-05-01 | 1993-03-02 | Mobil Oil Corporation | Method for reconfiguration tankers |
WO1994026585A1 (en) * | 1993-05-18 | 1994-11-24 | Special Projects Research Corp. | Method and device for the installation of double hull protection |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 015, no. 393 (M - 1165) 4 October 1991 (1991-10-04) * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102745307A (en) * | 2012-06-29 | 2012-10-24 | 深圳市海斯比船艇科技股份有限公司 | Manufacturing method of ship and ship manufactured by using same |
CN102745307B (en) * | 2012-06-29 | 2015-02-18 | 深圳市海斯比船艇科技股份有限公司 | Manufacturing method of ship |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6357373B1 (en) | Rebuilt double hull vessel and method of rebuilding a single hull vessel into a double hull vessel | |
US5909715A (en) | Method of conversion of a vessel from single to double hull | |
US4085695A (en) | Logistical support of offshore drilling facilities | |
US20080196655A1 (en) | Vessels | |
EP0856464A1 (en) | Conversion of single to double hull - hull-up technique | |
CN111791983A (en) | Hull broadside structure of semi-submersible multifunctional transport assembly and disassembly ship | |
US6637359B1 (en) | System and method for internally fitting a new inner hull to an existing outer hull to form a rebuilt double hull vessel | |
US5090346A (en) | Multi-part ship construction system | |
KR20060096761A (en) | Ship-building method in a inclined building berth by mounting super block on platform car | |
Carmichael | Practical ship production | |
US11370512B2 (en) | Tug with an all around towing installation | |
CN221163199U (en) | 66-Meter landing boat | |
RU2308398C1 (en) | Method of afloat erection of ship's hull and device for realization of this method | |
CN212386643U (en) | Hull broadside structure of semi-submersible multifunctional transport assembly and disassembly ship | |
JPH0811775A (en) | Connection method for hull module | |
CN219927937U (en) | Multifunctional electric pushing tug | |
KR19980073763A (en) | How to convert a single hull vessel into a double hull vessel | |
BG62606B1 (en) | Sea-based transportation and load handling system | |
EP1723293B1 (en) | Portable cabin and apparatus for transporting portable cabins and the like | |
JPH03159895A (en) | Hull modifying method for tanker | |
CN117163244A (en) | Multifunctional floating production storage and unloading device and construction method thereof | |
CA1069387A (en) | Logistical support of offshore drilling facilities | |
JPH10273090A (en) | Conversion of ship from single hull to double hull, and technique for raising hull bottom | |
Egan | USS Terror and her family | |
Atwood | War-ships |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
17P | Request for examination filed |
Effective date: 19971219 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE DE ES FR GR IT NL PT |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;RO;SI |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
AKX | Designation fees paid |
Free format text: BE DE ES FR GR IT NL PT |
|
RBV | Designated contracting states (corrected) |
Designated state(s): BE DE ES FR GR IT NL PT |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19990515 |