GB1511235A - Offshore semisubmersible rigs - Google Patents

Offshore semisubmersible rigs

Info

Publication number
GB1511235A
GB1511235A GB27195/74A GB2719574A GB1511235A GB 1511235 A GB1511235 A GB 1511235A GB 27195/74 A GB27195/74 A GB 27195/74A GB 2719574 A GB2719574 A GB 2719574A GB 1511235 A GB1511235 A GB 1511235A
Authority
GB
United Kingdom
Prior art keywords
pontoon
rudder
pontoons
stern
june
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.)
Expired
Application number
GB27195/74A
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.)
DOUST D
Original Assignee
DOUST D
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 DOUST D filed Critical DOUST D
Priority to GB27195/74A priority Critical patent/GB1511235A/en
Publication of GB1511235A publication Critical patent/GB1511235A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/16—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in recesses; with stationary water-guiding elements; Means to prevent fouling of the propeller, e.g. guards, cages or screens
    • 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 
    • 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

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)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

1511235 Propelling semi submersible rigs D J DOUST 18 June 1975 [19 June 1974] 27195/74 Heading B7V A semi submersible rig comprises a plurality of pontoons which support a working deck and at least one of the pontoons has a propulsion and steering unit at each end comprising a Y-shaped duct 22 arranged with two arms 23 opening into the sides of the pontoon and a stern 24 opening into a rudder recess 29 in a respective pontoon end, rudder means in the recess, valve means in each of the arms 23 and a propeller 36 in the stern 24. As described the rudder means comprise twin rudders 30 and the valve means comprise butterfly valves 31. Ballast tanks and drive motors 32 are arranged in the pontoon.
GB27195/74A 1975-06-18 1975-06-18 Offshore semisubmersible rigs Expired GB1511235A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB27195/74A GB1511235A (en) 1975-06-18 1975-06-18 Offshore semisubmersible rigs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB27195/74A GB1511235A (en) 1975-06-18 1975-06-18 Offshore semisubmersible rigs

Publications (1)

Publication Number Publication Date
GB1511235A true GB1511235A (en) 1978-05-17

Family

ID=10255726

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27195/74A Expired GB1511235A (en) 1975-06-18 1975-06-18 Offshore semisubmersible rigs

Country Status (1)

Country Link
GB (1) GB1511235A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2449032A1 (en) * 1979-02-15 1980-09-12 Moulet Marcel Ship's bow and stern manoeuvring propellers - has two rudders for each propeller in line with output flow
DE3524247A1 (en) * 1985-07-06 1987-01-08 Helmut Boehnke Tubular-shaft system for shipbuilding

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2449032A1 (en) * 1979-02-15 1980-09-12 Moulet Marcel Ship's bow and stern manoeuvring propellers - has two rudders for each propeller in line with output flow
DE3524247A1 (en) * 1985-07-06 1987-01-08 Helmut Boehnke Tubular-shaft system for shipbuilding

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee