FR2400086A1 - Mounting of maritime platform on hollow base with legs - includes submerging base using winches for elevating once platform is floated over - Google Patents

Mounting of maritime platform on hollow base with legs - includes submerging base using winches for elevating once platform is floated over

Info

Publication number
FR2400086A1
FR2400086A1 FR7724347A FR7724347A FR2400086A1 FR 2400086 A1 FR2400086 A1 FR 2400086A1 FR 7724347 A FR7724347 A FR 7724347A FR 7724347 A FR7724347 A FR 7724347A FR 2400086 A1 FR2400086 A1 FR 2400086A1
Authority
FR
France
Prior art keywords
platform
substructure
winches
base
mounting
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
FR7724347A
Other languages
French (fr)
Other versions
FR2400086B1 (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.)
Sea Tank Co SA
Original Assignee
Sea Tank Co SA
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 Sea Tank Co SA filed Critical Sea Tank Co SA
Priority to FR7724347A priority Critical patent/FR2400086A1/en
Publication of FR2400086A1 publication Critical patent/FR2400086A1/en
Application granted granted Critical
Publication of FR2400086B1 publication Critical patent/FR2400086B1/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 
    • B63B77/00—Transporting or installing offshore structures on site using buoyancy forces, e.g. using semi-submersible barges, ballasting the structure or transporting of oil-and-gas platforms
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
    • E02B17/021—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto with relative movement between supporting construction and platform
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B2017/0056—Platforms with supporting legs
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B2017/0056—Platforms with supporting legs
    • E02B2017/0069—Gravity structures

Abstract

The installation process applies to maritime platforms e.g. for oil fields and entails the mounting of a platform on a submerged gravity type substructure whilst at sea. The substructure has columsn projecting from a hollow base block and is floated together with the platform to the permanent site. The connection is then made by submerging the substructure and floating the platform into the correctly aligned position overhead. The substructure is partially submerged by filling the base with sea water, and complete submersion effected by winches with cables to a sea-bed anchorate. Once the platform is located above, the substructure is allowed to rise, and the connection is made by platform winches with cables to the substructure. The assembled rig is now floated onto a prepared foundation at a nominally higher bed level.
FR7724347A 1977-08-08 1977-08-08 Mounting of maritime platform on hollow base with legs - includes submerging base using winches for elevating once platform is floated over Granted FR2400086A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7724347A FR2400086A1 (en) 1977-08-08 1977-08-08 Mounting of maritime platform on hollow base with legs - includes submerging base using winches for elevating once platform is floated over

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7724347A FR2400086A1 (en) 1977-08-08 1977-08-08 Mounting of maritime platform on hollow base with legs - includes submerging base using winches for elevating once platform is floated over

Publications (2)

Publication Number Publication Date
FR2400086A1 true FR2400086A1 (en) 1979-03-09
FR2400086B1 FR2400086B1 (en) 1980-03-14

Family

ID=9194349

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7724347A Granted FR2400086A1 (en) 1977-08-08 1977-08-08 Mounting of maritime platform on hollow base with legs - includes submerging base using winches for elevating once platform is floated over

Country Status (1)

Country Link
FR (1) FR2400086A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2616462A1 (en) * 1987-06-10 1988-12-16 Mobil Oil Corp Method for installing a support for an offshore platform
WO1989002848A1 (en) * 1987-10-02 1989-04-06 Seaways Engineering (U.K.) Limited Floating production system and vessel for undersea oil well
EP0908382A3 (en) * 1997-09-16 1999-08-11 Deep Oil Technology, Incorporated Methods of assembling floating offshore structures
WO1999054198A1 (en) * 1998-04-17 1999-10-28 Novellent Technologies L.L.C. Tendon-based floating structure
FR2779408A1 (en) * 1998-06-08 1999-12-10 Doris Engineering METHOD OF INSTALLING A SELF-LIFTING GRAVITY PLATFORM FOR THE OPERATION OF AN OIL FIELD AT SEA
GB2378472A (en) * 2001-08-10 2003-02-12 Spartec Inc Method of constructing a floating offshore structure

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2616462A1 (en) * 1987-06-10 1988-12-16 Mobil Oil Corp Method for installing a support for an offshore platform
WO1989002848A1 (en) * 1987-10-02 1989-04-06 Seaways Engineering (U.K.) Limited Floating production system and vessel for undersea oil well
EP0908382A3 (en) * 1997-09-16 1999-08-11 Deep Oil Technology, Incorporated Methods of assembling floating offshore structures
WO1999054198A1 (en) * 1998-04-17 1999-10-28 Novellent Technologies L.L.C. Tendon-based floating structure
US6431107B1 (en) 1998-04-17 2002-08-13 Novellant Technologies, L.L.C. Tendon-based floating structure
FR2779408A1 (en) * 1998-06-08 1999-12-10 Doris Engineering METHOD OF INSTALLING A SELF-LIFTING GRAVITY PLATFORM FOR THE OPERATION OF AN OIL FIELD AT SEA
EP0963906A1 (en) * 1998-06-08 1999-12-15 Doris Engineering Method for the installation of a gravity, self-elevating oil production platform at sea
GB2378472A (en) * 2001-08-10 2003-02-12 Spartec Inc Method of constructing a floating offshore structure

Also Published As

Publication number Publication date
FR2400086B1 (en) 1980-03-14

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Legal Events

Date Code Title Description
ST Notification of lapse