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FR2408512A1 - Anchored floating platform e.g. for drilling - has central vertical tube connected at lower end by radial flotation chambers to platform's vertical flotation legs - Google Patents

Anchored floating platform e.g. for drilling - has central vertical tube connected at lower end by radial flotation chambers to platform's vertical flotation legs

Info

Publication number
FR2408512A1
FR2408512A1 FR7733995A FR7733995A FR2408512A1 FR 2408512 A1 FR2408512 A1 FR 2408512A1 FR 7733995 A FR7733995 A FR 7733995A FR 7733995 A FR7733995 A FR 7733995A FR 2408512 A1 FR2408512 A1 FR 2408512A1
Authority
FR
France
Prior art keywords
legs
platform
central tube
flotation
deck
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
FR7733995A
Other languages
French (fr)
Other versions
FR2408512B1 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7733995A priority Critical patent/FR2408512A1/en
Publication of FR2408512A1 publication Critical patent/FR2408512A1/en
Application granted granted Critical
Publication of FR2408512B1 publication Critical patent/FR2408512B1/fr
Granted 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 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Earth Drilling (AREA)
  • Foundations (AREA)

Abstract

Platform is of the type having several vertical tubular flotation legs, of which >=3 have their axes approximately on the surface of the same cylinder. A working deck is mounted on the upper ends of the legs. Horizontal flotation chambers connect the lower ends of adjacent legs, and a network of cross-struts links the underside of the deck to the legs. The deck is made up of cross-members orthogonally arranged to define unit squares and/or rectangles equal to half or double a unit square. Each of the legs, together with the central tube, is located within one of the unit squares. The central tube has its axis coincident with that of the cylinder and opens at one end on the upper surface of the deck and at the other end level with the lower ends of the legs. At >=3 of the legs are connected to the central tube by radial tubular horizontal flotation chambers. The rigidity and floating stability of the platform are greater than with conventional designs, and the tractive forces on the anchoring cables are reduced for the same degree of anchoring stability. The central tube not only contributes to these advantages, but also serves to protect different components passed down the tube into the sea from the deleterious effects of the waves. Drill-pipes, protecting drill strings, may pass through the central tube.
FR7733995A 1977-11-10 1977-11-10 Anchored floating platform e.g. for drilling - has central vertical tube connected at lower end by radial flotation chambers to platform's vertical flotation legs Granted FR2408512A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7733995A FR2408512A1 (en) 1977-11-10 1977-11-10 Anchored floating platform e.g. for drilling - has central vertical tube connected at lower end by radial flotation chambers to platform's vertical flotation legs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7733995A FR2408512A1 (en) 1977-11-10 1977-11-10 Anchored floating platform e.g. for drilling - has central vertical tube connected at lower end by radial flotation chambers to platform's vertical flotation legs

Publications (2)

Publication Number Publication Date
FR2408512A1 true FR2408512A1 (en) 1979-06-08
FR2408512B1 FR2408512B1 (en) 1981-03-20

Family

ID=9197507

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7733995A Granted FR2408512A1 (en) 1977-11-10 1977-11-10 Anchored floating platform e.g. for drilling - has central vertical tube connected at lower end by radial flotation chambers to platform's vertical flotation legs

Country Status (1)

Country Link
FR (1) FR2408512A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999057011A1 (en) * 1998-05-01 1999-11-11 Friede & Goldman, Ltd. Dynamically positioned semi-submersible drilling vessel
WO2023006800A1 (en) * 2021-07-28 2023-02-02 Tractebel Engineering An offshore floater and a related offshore floater plant

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2124455C1 (en) * 1995-07-18 1999-01-10 Центральное конструкторское бюро "Коралл" Floating operational platform

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB866611A (en) * 1958-10-08 1961-04-26 Otto Popper Improvements in and relating to chains and marine apparatus moored or anchored by chains to the sea bed
FR1519528A (en) * 1966-03-03 1968-04-05 Inst Francais Du Petrole High stability semi-submersible floating structure
FR1577861A (en) * 1967-09-01 1969-08-08
US3841249A (en) * 1971-05-14 1974-10-15 D Equipement Mecaniques & Hydr Floating systems of the barge type, especially for drilling in deep water
US3885511A (en) * 1972-04-21 1975-05-27 Marcon Ingbureau Float drilling platform or similar floating structure
FR2271115A1 (en) * 1974-05-15 1975-12-12 Inst Francais Du Petrole Semi-submersible structure for off shore operation - offering minimum resistance to wind and waves
US4037424A (en) * 1975-10-03 1977-07-26 Anders Edward O Offshore drilling structure

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB866611A (en) * 1958-10-08 1961-04-26 Otto Popper Improvements in and relating to chains and marine apparatus moored or anchored by chains to the sea bed
FR1519528A (en) * 1966-03-03 1968-04-05 Inst Francais Du Petrole High stability semi-submersible floating structure
FR1577861A (en) * 1967-09-01 1969-08-08
US3841249A (en) * 1971-05-14 1974-10-15 D Equipement Mecaniques & Hydr Floating systems of the barge type, especially for drilling in deep water
US3885511A (en) * 1972-04-21 1975-05-27 Marcon Ingbureau Float drilling platform or similar floating structure
FR2271115A1 (en) * 1974-05-15 1975-12-12 Inst Francais Du Petrole Semi-submersible structure for off shore operation - offering minimum resistance to wind and waves
US4037424A (en) * 1975-10-03 1977-07-26 Anders Edward O Offshore drilling structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999057011A1 (en) * 1998-05-01 1999-11-11 Friede & Goldman, Ltd. Dynamically positioned semi-submersible drilling vessel
WO2023006800A1 (en) * 2021-07-28 2023-02-02 Tractebel Engineering An offshore floater and a related offshore floater plant
BE1029630B1 (en) * 2021-07-28 2023-02-27 Tractebel Eng OFFSHORE FLOATING AND RELATED OFFSHORE FLOATING INSTALLATION

Also Published As

Publication number Publication date
FR2408512B1 (en) 1981-03-20

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Legal Events

Date Code Title Description
ST Notification of lapse