WO1985005339A1 - Navire multicoque - Google Patents

Navire multicoque Download PDF

Info

Publication number
WO1985005339A1
WO1985005339A1 PCT/GB1985/000211 GB8500211W WO8505339A1 WO 1985005339 A1 WO1985005339 A1 WO 1985005339A1 GB 8500211 W GB8500211 W GB 8500211W WO 8505339 A1 WO8505339 A1 WO 8505339A1
Authority
WO
WIPO (PCT)
Prior art keywords
vessel
pontoons
columns
hulled
pontoon
Prior art date
Application number
PCT/GB1985/000211
Other languages
English (en)
Inventor
James I. Montgomery
Marvin Steve Worley
Edward Lloyd Turner
Original Assignee
Worley Engineering Limited
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 Worley Engineering Limited filed Critical Worley Engineering Limited
Priority to BR8506744A priority Critical patent/BR8506744A/pt
Publication of WO1985005339A1 publication Critical patent/WO1985005339A1/fr

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
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
    • B63B1/107—Semi-submersibles; Small waterline area multiple hull vessels and the like, e.g. SWATH

Definitions

  • This invention relates to multi-hulled vessels and is particularly although not exclusively applicable to vessels known as semi-submersible ⁇ in which a deck for carrying a pay-load is mounted on columns extending upwardly from normally submerged pontoons or hulls.
  • Conventionally such vessels do not have self-propulsion means to propel the vessel at any reasonable transit speed and the structure inter-connecting the columns, hulls and deck is such as to cause considerable drag when they are moved from place to place. As a result such vessels can normally only be moved very slowly. Further, it is normal for the pontoons of such vessels to be de-ballasted to ride on the surface during movement from place to place.
  • U.S.Patent Specification Nos: 370123, 3830178, 3897744 and 4440103 disclose semi-submersibles of the type referred to above but adapted for high-speed operation.
  • the vessels utilise lenticular form column ⁇ to minimise forward resistance and require elaborate systems to control the dynamic pitch when at speed.
  • the columns have a considerable lateral area which causes such vessels to be easily displaced by a beam on sea making it difficult to keep such vessels on station.
  • the invention provides a multi-hulled vessel comprising a plurality of ubmerged streamlined pontoons located parallel to one another and each having one or more upwardly extending structural columns, a deck structure rigidly attached to the upper ends of the columns to carry a payload, means to propel the vessel in the fore and aft direction and means embodied within the depth of the pontoons to move the vessel laterally, the vessel waterline in its normal operation position extending through the columns between the pontoons and deck structure and the columns each having a streamlined cross-section which is curved with a varying radius of curvature around at least a greater part of the section including the forwardly disposed part thereof and which section is elongate in the fore and aft direction to minimise both fore and aft and lateral resistances.
  • the columns have an elliptical cross-section although other compound curvatures are also applicable.
  • means are provided for ballasting and de-ballasting at least the pontoons of the vessel to vary the vessel waterline so that the vessel may be trimmed to a normal waterline position extending through the columns between the pontoons and the deck structure and, by de-ballasting the pontoons, the vessel may be raised to bring the pontoons to or adjacent the surface of the water to reduce the draft of the vessel for operation in shallow water such as when entering harbour.
  • Figure 1 is a diagrammatic view of a multi-hulled vessel
  • Figure 2 is a side view of the vessel;
  • Figure 3 is a view of the vessel bow;
  • Figure 4 is a similar view to Figure 1 showing the deck of the vessel fitted out as an oil field workover vessel; and
  • FIGS 5 to 7 are more detailed views of parts of the vessel.
  • FIG. 1 to 3 of the drawings there is shown a multi-hulled vessel having two streamlined pontoons 10 located parallel and spaced apart from one another.
  • Each pontoon 10 has an upright structural column 11 adjacent the forward end thereof and a similar column 12 adjacent the aft end thereof.
  • a pay-load carrying deck 9 is rigidly mounted at the upper ends of the columns.
  • Reinforcement 18 is provided between the upper parts of the columns above the vessel waterline to the underside of the deck 9 to strengthen the connection between the deck and columns.
  • the columns 11, 12 may be flared as indicated at 13, 14 at their lower ends where they join the pontoons 10.
  • Each column 11, 12 is of streamline form tapering to both its forward and rearward ends from a point of maximum width with a streamlined cross-section.
  • the column cross-sections are of a symmetrical elliptical cross-section with the major axes extending lengthwise of the pontoons to create a substantially streamlined overall cross-section.
  • the buoyancy of the pontoons 10 and the lower parts of the columns is such that the vessel floats with a waterline (indicated at 8 on Figures 1 to 3) through the columns 11, 12 between the pontoons and deck.
  • the columns are designed to permit the vessel to move through the water in its normal ballasted state without having to de-ballast the pontoons 10 to lie on the surface of the water.
  • the columns 11, 12 are so streamlined and the structure is such that minimum disturbance of the water is created as the vessel moves through the water .
  • thrust units 15 incorporating conventional motor driven propellors are mounted at the sterns of the pontoons 10.
  • side thrusters in the form of motor driven propellors are provided in throughways 16, 17 arranged singularly or in pairs adjacent the forward and rearward ends of the pontoons as necessary.
  • the vessel can be displaced laterally or turned on its own axis as required.
  • the thrust means 15 and side thrusters the hulls may be provided with power drives mounted to swivel about vertical axes to propel and direct the vessel.
  • the propulsion systems of the vessel are intended to enable the vessel to be moved independently from site to site where it is required to be operated with the vessel floating to its normal waterline, that is partway up the columns 11. 12.
  • the forward and lateral thrust means are intended to enable the vessel to be kept on station if required as an alternative to an anchoring system.
  • the deck of the vessel is intended to be fitted out to suit its required purpose.
  • the deck may be provided with a crane 20, a helicopter launching/landing pad 21, and other equipment and utilities to enable the vessel to perform its required function.
  • the vessel may therefore be built in different sizes and fitted out as a support vessel or a workover vessel for other off-shore operations particularly those involving oil/gas production.
  • the vessel may be fitted out for (i) diving support, (ii) well stimulation and workover (iii) multi-functional services, (iv) crew service, (v) standby duties, or (vi) rapid intervention.
  • each pontoon 10 is sub-divided internally to provide ballast tanks, fuel tanks and machinery rooms.
  • three fuel tanks 31 and fresh water tank 32 are provided.
  • On the corresponding outer part of the pontoon ballast tanks 33 are provided with an escape tunnel 34 between the ballast tanks and opposing fuel/water tanks 31,32.
  • Further ballast tanks 35 and 36 are provided on either side of each pontoon below the connection of the structural column 11, 12 to the pontoon.
  • an inner machinery room 37 containing the motors for the thrust units 17 and further ballast tanks 38 are provided between the machinery room 37 and the outer sides of the vessel and the bow of the vessel contains ballast tanks 39.
  • the stern of the pontoon contains a further machinery room 40 containing a prime mover for example a motor or motors for the main propulsion unit indicated at 15 and further ballast tanks 41 are provided between the sides of the machinery room and the sides of the pontoon.
  • the fuel tanks for the vessel are positioned in which their vulnerability to damage by collision is reduced to a minimum and it will also be appreciated that the positioning of the ballast tanks provides some protection to the machinery rooms in the pontoons in the event of a collision.
  • ballast tanks 42 are provided on the outer sides of the columns 11, 12 and still further ballast tanks 43 are provided before and aft ends of each column 11, 12.
  • the ballast tanks are disposed to provide some protection to the columns on the outer side of the columns which are most vulnerable to damage by collision.
  • FIG. 7 of the drawings illustrates the pumping circuit and valving system for each pontoon and its associated column.
  • the aft part of the pontoon and the rear column 12 have a ballast pump 45 associated circuitry and control valves indicated generally at 46.
  • valve control connections to the ballast tanks of the after column 12 indicated generally at 47 and valve control connections to the ballast tanks in the after part of the pontoon indicated generally at 48.
  • a similar pump 49 is provided for the forward part of the pontoon and the forward column and like parts have been allotted the same reference numeral.
  • the arrangement of pumps and valve controls enables ballast tanks to be emptied or filled with sea water individually or collectively to enable the trim of the vessel to be adjusted.
  • the vessel can be trimmed to its normal water line indicated at 51 on Figure 5 lying at a position between the upper and lower ends of the columns and the contents of the ballast tanks may be adjusted to maintain the vessel in this position, correcting for the consumption of payload, fuel oil and other consumables.

Landscapes

  • Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
  • Epoxy Compounds (AREA)

Abstract

Navire multicoque possédant deux flotteurs carénés immergés (10) s'étendant l'un parallèle à l'autre et possédant des unités de propulsion (15, 17) ainsi que chacun deux colonnes structurales montantes (11) supportant un pont (13) muni d'une surface de charge située au-dessus de la surface du plan d'eau. La ligne d'eau normale (8) du navire s'étend à travers les colonnes carénées, présentant une section transversale de préférence elliptique, pour réduire au minimum les forces dues à la résistance hydrodynamique à l'avant, à l'arrière et transversale.
PCT/GB1985/000211 1984-05-17 1985-05-17 Navire multicoque WO1985005339A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BR8506744A BR8506744A (pt) 1984-05-17 1985-05-17 Embarcacao de multiplos cascos

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8412540 1984-05-17
GB848412540A GB8412540D0 (en) 1984-05-17 1984-05-17 Multi-hulled vessels

Publications (1)

Publication Number Publication Date
WO1985005339A1 true WO1985005339A1 (fr) 1985-12-05

Family

ID=10561068

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1985/000211 WO1985005339A1 (fr) 1984-05-17 1985-05-17 Navire multicoque

Country Status (6)

Country Link
BR (1) BR8506744A (fr)
FI (1) FI851960L (fr)
GB (2) GB8412540D0 (fr)
NO (1) NO851979L (fr)
SE (1) SE8502446L (fr)
WO (1) WO1985005339A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997010989A1 (fr) * 1995-09-18 1997-03-27 Kverndokk & Eldøy A/S Plate-forme de travail marine multicoque
WO1999011518A1 (fr) * 1997-08-29 1999-03-11 Dsnd Offshore As Appareil pour une installation mobile, notamment un vaisseau de haute mer
US8662000B2 (en) 2009-11-08 2014-03-04 Ssp Technologies, Inc. Stable offshore floating depot
CN108082399A (zh) * 2017-12-14 2018-05-29 河北淳博航空科技有限公司 一种无人船
CN111907653A (zh) * 2020-08-18 2020-11-10 上海交通大学 海上浮式风机与养殖网箱的集成互补系统

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994025334A1 (fr) * 1993-04-28 1994-11-10 Helmut Borcherdt Bateau
GB9724064D0 (en) * 1997-11-15 1998-01-14 Sofitech Nv Semi-submersible structure
DE20202567U1 (de) * 2002-02-19 2002-05-02 Abeking & Rasmussen Schiffs Un SWATH-Lotsenboot
FR2969575B1 (fr) * 2010-12-27 2013-08-23 Christoph Bente Structure flottante

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1225372A (fr) * 1968-02-13 1971-03-17
US4174671A (en) * 1978-05-18 1979-11-20 Pacific Marine & Supply Co., Ltd. Semisubmerged ship
GB1568509A (en) * 1977-02-02 1980-05-29 Smit Lloyd Bv Double hull utility vessel
GB2041308A (en) * 1979-02-20 1980-09-10 Mitsui Shipbuilding Eng Semi-submersible vessel

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1035275A (en) * 1963-05-28 1966-07-06 Jacob Johannes Stenger Self-propelled floating marine vessel
GB1260831A (en) * 1967-10-10 1972-01-19 Joe Huntley Shillito A twin-hulled vessel (catamaran) with composite hulls
GB1277494A (en) * 1969-09-03 1972-06-14 Santa Fe Internat Corp Twin hull, variable draft vessel
US3894503A (en) * 1973-04-06 1975-07-15 Brown & Root Method for converting a floatable barge into a semi-submersible vessel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1225372A (fr) * 1968-02-13 1971-03-17
GB1568509A (en) * 1977-02-02 1980-05-29 Smit Lloyd Bv Double hull utility vessel
US4174671A (en) * 1978-05-18 1979-11-20 Pacific Marine & Supply Co., Ltd. Semisubmerged ship
GB2041308A (en) * 1979-02-20 1980-09-10 Mitsui Shipbuilding Eng Semi-submersible vessel

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997010989A1 (fr) * 1995-09-18 1997-03-27 Kverndokk & Eldøy A/S Plate-forme de travail marine multicoque
WO1999011518A1 (fr) * 1997-08-29 1999-03-11 Dsnd Offshore As Appareil pour une installation mobile, notamment un vaisseau de haute mer
US8662000B2 (en) 2009-11-08 2014-03-04 Ssp Technologies, Inc. Stable offshore floating depot
CN108082399A (zh) * 2017-12-14 2018-05-29 河北淳博航空科技有限公司 一种无人船
CN111907653A (zh) * 2020-08-18 2020-11-10 上海交通大学 海上浮式风机与养殖网箱的集成互补系统

Also Published As

Publication number Publication date
GB8412540D0 (en) 1984-06-20
GB8512467D0 (en) 1985-06-19
GB2159114A (en) 1985-11-27
FI851960A0 (fi) 1985-05-16
NO851979L (no) 1985-11-18
SE8502446L (sv) 1985-11-18
FI851960L (fi) 1985-11-18
SE8502446D0 (sv) 1985-05-17
BR8506744A (pt) 1986-09-23

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