NL7800366A - Semi-submersible oil exploration rig - in which float section houses all machinery, tanks, accommodation etc. and derrick comprises structural column between float and supply deck - Google Patents

Semi-submersible oil exploration rig - in which float section houses all machinery, tanks, accommodation etc. and derrick comprises structural column between float and supply deck

Info

Publication number
NL7800366A
NL7800366A NL7800366A NL7800366A NL7800366A NL 7800366 A NL7800366 A NL 7800366A NL 7800366 A NL7800366 A NL 7800366A NL 7800366 A NL7800366 A NL 7800366A NL 7800366 A NL7800366 A NL 7800366A
Authority
NL
Netherlands
Prior art keywords
float
deck
semi
tanks
machinery
Prior art date
Application number
NL7800366A
Other languages
Dutch (nl)
Original Assignee
Ogem Bouw B V
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 Ogem Bouw B V filed Critical Ogem Bouw B V
Priority to NL7800366A priority Critical patent/NL7800366A/en
Publication of NL7800366A publication Critical patent/NL7800366A/en

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 
    • B63B5/00—Hulls characterised by their construction of non-metallic material
    • B63B5/14—Hulls characterised by their construction of non-metallic material made predominantly of concrete, e.g. reinforced
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B75/00—Building or assembling floating offshore structures, e.g. semi-submersible platforms, SPAR platforms or wind turbine platforms
    • 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
    • B63B1/04—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with single hull
    • B63B2001/044—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with single hull with a small waterline area compared to total displacement, e.g. of semi-submersible type
    • 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
    • B63B1/12—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly
    • B63B2001/128—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly comprising underwater connectors between the hulls

Landscapes

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

Abstract

The float part of a semi-submersible work platform for oil and gas exploration consists of an endless hollow section with >=1 rising column to which the work deck is attached so that, in the submerged condition, the deck remains the prescribed distance above the water level and the float the prescribed distance below it. The cross-section of the float ring is pref. circular or oval shaped. The central column may be used to house the work floor, turntable and drilling gear and all of the machinery and tanks may be incorporated into float section. As a result, the centre of gravity of the total structure is significantly lowered, the work deck only being used for the derek, cranes and helicopter deck. That part of the structure which is submerged is pref. built of concrete. To facilitate construction, the ring shaped float is built of separate sealed compartments in a floating dock so that, as each compartment is finished, it may be floated out of the dock and the next segment can be built onto it. The structure is able to carry a given load with a lower centre of gravity than the conventional semi-submersible rig with the consequence that less water ballast is required and a smaller overall structure is achieved with an increased stability.
NL7800366A 1978-01-12 1978-01-12 Semi-submersible oil exploration rig - in which float section houses all machinery, tanks, accommodation etc. and derrick comprises structural column between float and supply deck NL7800366A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7800366A NL7800366A (en) 1978-01-12 1978-01-12 Semi-submersible oil exploration rig - in which float section houses all machinery, tanks, accommodation etc. and derrick comprises structural column between float and supply deck

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7800366A NL7800366A (en) 1978-01-12 1978-01-12 Semi-submersible oil exploration rig - in which float section houses all machinery, tanks, accommodation etc. and derrick comprises structural column between float and supply deck

Publications (1)

Publication Number Publication Date
NL7800366A true NL7800366A (en) 1979-07-16

Family

ID=19830139

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7800366A NL7800366A (en) 1978-01-12 1978-01-12 Semi-submersible oil exploration rig - in which float section houses all machinery, tanks, accommodation etc. and derrick comprises structural column between float and supply deck

Country Status (1)

Country Link
NL (1) NL7800366A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4784079A (en) * 1986-10-08 1988-11-15 Single Buoy Moorings Inc. Apparatus such as a working platform which by means of tension loaded tension member has been anchored and which has been provided with means for mooring a vessel
CN107685838A (en) * 2016-08-05 2018-02-13 中集海洋工程研究院有限公司 The ballasting system and its ballast method of Semi-submersible type hoisting platform

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4784079A (en) * 1986-10-08 1988-11-15 Single Buoy Moorings Inc. Apparatus such as a working platform which by means of tension loaded tension member has been anchored and which has been provided with means for mooring a vessel
CN107685838A (en) * 2016-08-05 2018-02-13 中集海洋工程研究院有限公司 The ballasting system and its ballast method of Semi-submersible type hoisting platform

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Legal Events

Date Code Title Description
A1B A search report has been drawn up
BV The patent application has lapsed