GB2257664A - Semi-submersible platform with porous pontoons - Google Patents

Semi-submersible platform with porous pontoons

Info

Publication number
GB2257664A
GB2257664A GB9217049A GB9217049A GB2257664A GB 2257664 A GB2257664 A GB 2257664A GB 9217049 A GB9217049 A GB 9217049A GB 9217049 A GB9217049 A GB 9217049A GB 2257664 A GB2257664 A GB 2257664A
Authority
GB
United Kingdom
Prior art keywords
semi
pontoons
porous
submersible platform
walls
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.)
Granted
Application number
GB9217049A
Other versions
GB9217049D0 (en
GB2257664B (en
Inventor
Bernard Molin
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.)
IFP Energies Nouvelles IFPEN
Original Assignee
IFP Energies Nouvelles IFPEN
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 IFP Energies Nouvelles IFPEN filed Critical IFP Energies Nouvelles IFPEN
Publication of GB9217049D0 publication Critical patent/GB9217049D0/en
Publication of GB2257664A publication Critical patent/GB2257664A/en
Application granted granted Critical
Publication of GB2257664B publication Critical patent/GB2257664B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • B63B35/4413—Floating drilling platforms, 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
    • B63B39/005—Equipment to decrease ship's vibrations produced externally to the ship, e.g. wave-induced vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
    • B63B39/06—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
    • B63B2039/067—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water effecting motion dampening by means of fixed or movable resistance bodies, e.g. by bilge keels

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

Semi-submersible platform comprised particularly of semi-immersed columns and totally immersed elongate elements or pontoons (4) having a substantially horizontal axis, at least some of them having porous walls, the porosity being obtained by a large number of small holes in said walls. The porosity degree, in other words the ratio between the total surface of the holes and the total surface of the walls is preferably at the most equal to 30 %.
GB9217049A 1990-12-13 1992-08-11 Semi-submersible platforms with porous pontoons Expired - Lifetime GB2257664B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9015749A FR2670459B1 (en) 1990-12-13 1990-12-13 SEMI-SUBMERSIBLE PLATFORM WITH POROUS PONTOONS.
PCT/FR1991/000963 WO1992010398A1 (en) 1990-12-13 1991-12-02 Semi-submersible platform with porous pontoons

Publications (3)

Publication Number Publication Date
GB9217049D0 GB9217049D0 (en) 1992-11-18
GB2257664A true GB2257664A (en) 1993-01-20
GB2257664B GB2257664B (en) 1994-09-28

Family

ID=9403297

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9217049A Expired - Lifetime GB2257664B (en) 1990-12-13 1992-08-11 Semi-submersible platforms with porous pontoons

Country Status (5)

Country Link
BR (1) BR9106221A (en)
FR (1) FR2670459B1 (en)
GB (1) GB2257664B (en)
NO (1) NO308517B1 (en)
WO (1) WO1992010398A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2314044A (en) * 1996-06-12 1997-12-17 Christopher David Slennett A floating structure with ballast tanks

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9302747B2 (en) 2013-04-10 2016-04-05 Technip France Floating offshore platform with pontoon-coupled extension plates for reduced heave motion

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3224401A (en) * 1964-04-13 1965-12-21 Shell Oil Co Stabilized floating drilling platform
US3386404A (en) * 1965-08-22 1968-06-04 Motora Seizo Ship's hull adapted for considerably reducing vertical forces caused by waves
US3915108A (en) * 1973-09-24 1975-10-28 Global Marine Inc Apparatus for controlling heave pitch and roll of a floating vessel
GB2008515A (en) * 1977-11-25 1979-06-06 Brown & Root Apparatus to reduce vessel motions
US4505617A (en) * 1979-10-12 1985-03-19 National Research Development Corporation Stabilizing bluff structures against oscillation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3224401A (en) * 1964-04-13 1965-12-21 Shell Oil Co Stabilized floating drilling platform
US3386404A (en) * 1965-08-22 1968-06-04 Motora Seizo Ship's hull adapted for considerably reducing vertical forces caused by waves
US3915108A (en) * 1973-09-24 1975-10-28 Global Marine Inc Apparatus for controlling heave pitch and roll of a floating vessel
GB2008515A (en) * 1977-11-25 1979-06-06 Brown & Root Apparatus to reduce vessel motions
US4505617A (en) * 1979-10-12 1985-03-19 National Research Development Corporation Stabilizing bluff structures against oscillation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2314044A (en) * 1996-06-12 1997-12-17 Christopher David Slennett A floating structure with ballast tanks

Also Published As

Publication number Publication date
WO1992010398A1 (en) 1992-06-25
GB9217049D0 (en) 1992-11-18
FR2670459B1 (en) 1995-07-13
NO923155L (en) 1992-10-12
BR9106221A (en) 1993-03-30
NO923155D0 (en) 1992-08-12
NO308517B1 (en) 2000-09-25
GB2257664B (en) 1994-09-28
FR2670459A1 (en) 1992-06-19

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