FR2286052A1 - Propulsion unit - for dynamic location of semi-submersible drilling platform, floats in a low draught transit position to facilitate inspection and repair - Google Patents

Propulsion unit - for dynamic location of semi-submersible drilling platform, floats in a low draught transit position to facilitate inspection and repair

Info

Publication number
FR2286052A1
FR2286052A1 FR7432441A FR7432441A FR2286052A1 FR 2286052 A1 FR2286052 A1 FR 2286052A1 FR 7432441 A FR7432441 A FR 7432441A FR 7432441 A FR7432441 A FR 7432441A FR 2286052 A1 FR2286052 A1 FR 2286052A1
Authority
FR
France
Prior art keywords
floats
transit position
drilling
semi
draught
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
FR7432441A
Other languages
French (fr)
Other versions
FR2286052B1 (en
Inventor
Jean Chevallier
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.)
Forex Neptune SA
Original Assignee
Forex Neptune 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 Forex Neptune SA filed Critical Forex Neptune SA
Priority to FR7432441A priority Critical patent/FR2286052A1/en
Publication of FR2286052A1 publication Critical patent/FR2286052A1/en
Application granted granted Critical
Publication of FR2286052B1 publication Critical patent/FR2286052B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
    • B63H25/42—Steering or dynamic anchoring by propulsive elements; Steering or dynamic anchoring by propellers used therefor only; Steering or dynamic anchoring by rudders carrying propellers
    • 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
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D1/00—Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots
    • G05D1/02—Control of position or course in two dimensions
    • G05D1/0206—Control of position or course in two dimensions specially adapted to water vehicles
    • G05D1/0208—Control of position or course in two dimensions specially adapted to water vehicles dynamic anchoring

Landscapes

  • Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Earth Drilling (AREA)

Abstract

A propulsion unit for the dynamic location of a semi-submersible drilling platform with floats capable of submersion in a deep draught drilling position and of floating in a low draught transit position, comprises (a) a body designed to be fixed in and to close off an aperture cut in the upper part of one of the floats and thereby, to isolate a sealed compartment in the float (b) a support mounted on the body having an upper part designed to be extended above the float in such a way that is submerged in the drilling position and out of the water in the transit position (c) a propulsion element mounted in the upper part of the support member for exerting a thrust in a horizontal direction and (d) a transmission connected to the propulsion element and traversing the support members to extend into the sealed compartment. Advantageously, the transmission is connected to the output shaft of a motor so suspended from the body as to be situated in the compartment, which also contains a brake assembly associated with the output shaft. Since the propulsion element is out off the water in the transit position, the screw is readily inspected and in calm weather maintenance or repairs can be carried out without divers. Screw noise causes much less disturbance to acoustic detectors fixed under the floats for detecting the relative position of platform and well head so that vertical drilling is possible.
FR7432441A 1974-09-26 1974-09-26 Propulsion unit - for dynamic location of semi-submersible drilling platform, floats in a low draught transit position to facilitate inspection and repair Granted FR2286052A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7432441A FR2286052A1 (en) 1974-09-26 1974-09-26 Propulsion unit - for dynamic location of semi-submersible drilling platform, floats in a low draught transit position to facilitate inspection and repair

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7432441A FR2286052A1 (en) 1974-09-26 1974-09-26 Propulsion unit - for dynamic location of semi-submersible drilling platform, floats in a low draught transit position to facilitate inspection and repair

Publications (2)

Publication Number Publication Date
FR2286052A1 true FR2286052A1 (en) 1976-04-23
FR2286052B1 FR2286052B1 (en) 1978-08-11

Family

ID=9143461

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7432441A Granted FR2286052A1 (en) 1974-09-26 1974-09-26 Propulsion unit - for dynamic location of semi-submersible drilling platform, floats in a low draught transit position to facilitate inspection and repair

Country Status (1)

Country Link
FR (1) FR2286052A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2316119A1 (en) * 1975-06-18 1977-01-28 Liaaen As A M PROPULSION OR STEERING ASSEMBLY OF FLOATING INSTALLATIONS SUCH AS BUILDINGS, PONTOONS, PLATFORMS, ETC.
EP0150985A2 (en) * 1984-01-25 1985-08-07 Vickers Plc Vessel having demountable submerged propeller unit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2316119A1 (en) * 1975-06-18 1977-01-28 Liaaen As A M PROPULSION OR STEERING ASSEMBLY OF FLOATING INSTALLATIONS SUCH AS BUILDINGS, PONTOONS, PLATFORMS, ETC.
EP0150985A2 (en) * 1984-01-25 1985-08-07 Vickers Plc Vessel having demountable submerged propeller unit
EP0150985A3 (en) * 1984-01-25 1986-09-24 Vickers Plc Vessel having demountable submerged propeller unit

Also Published As

Publication number Publication date
FR2286052B1 (en) 1978-08-11

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Legal Events

Date Code Title Description
ST Notification of lapse