FR2338183A1 - Antirolling system for drilling platforms - with speed sensors, to actuate a dampening control force - Google Patents

Antirolling system for drilling platforms - with speed sensors, to actuate a dampening control force

Info

Publication number
FR2338183A1
FR2338183A1 FR7701207A FR7701207A FR2338183A1 FR 2338183 A1 FR2338183 A1 FR 2338183A1 FR 7701207 A FR7701207 A FR 7701207A FR 7701207 A FR7701207 A FR 7701207A FR 2338183 A1 FR2338183 A1 FR 2338183A1
Authority
FR
France
Prior art keywords
platform
control force
antirolling
actuate
dampening
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.)
Pending
Application number
FR7701207A
Other languages
French (fr)
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.)
Seatek Corp
Original Assignee
Seatek Corp
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
Priority claimed from US05/731,007 external-priority patent/US4112864A/en
Application filed by Seatek Corp filed Critical Seatek Corp
Publication of FR2338183A1 publication Critical patent/FR2338183A1/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D1/00—Control of position, course or altitude of land, water, air, or space vehicles, e.g. automatic pilot
    • 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
    • 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 
    • B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
    • B63B39/02—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by displacement of masses
    • B63B39/03—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by displacement of masses by transferring liquids

Abstract

The platform is subjected to a dampening force, which is a function of the rate of alteration of >=1 displacement component of the rolling movement. The sepd. of an undesirable movement of the platform is scanned, and a dampening control force is applied onto it, this being a function of the scanned speed, and is opposed to it. For scanning, sensors are provided, the output valves of which act onto a control unit, which in turn acts onto the platform. The sensors are formed, so that the vertical speed of lifting components of undesired movements is measured during wave periods, which corresponds to the resonance frequency of the structure.
FR7701207A 1976-01-19 1977-01-17 Antirolling system for drilling platforms - with speed sensors, to actuate a dampening control force Pending FR2338183A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US64999776A 1976-01-19 1976-01-19
US73100676A 1976-10-08 1976-10-08
US05/731,007 US4112864A (en) 1976-10-08 1976-10-08 Heave stabilization of semi-submersible platforms

Publications (1)

Publication Number Publication Date
FR2338183A1 true FR2338183A1 (en) 1977-08-12

Family

ID=27417834

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7701207A Pending FR2338183A1 (en) 1976-01-19 1977-01-17 Antirolling system for drilling platforms - with speed sensors, to actuate a dampening control force

Country Status (6)

Country Link
JP (1) JPS52111191A (en)
AU (1) AU2124677A (en)
CA (1) CA1075092A (en)
DE (1) DE2701605A1 (en)
FR (1) FR2338183A1 (en)
NL (1) NL7700462A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2443418A1 (en) * 1978-12-04 1980-07-04 Varitrac Ag SYSTEM FOR STABILIZING A FLOATING MACHINE CARRYING CRANES
FR2881102A1 (en) * 2005-01-21 2006-07-28 D2M Consultants S A Sa STABILIZED FLOATING SUPPORT

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3471910D1 (en) * 1983-04-28 1988-07-14 Mobil Oil Corp Wide based semi-submersible vessel
JPS59192933U (en) * 1983-06-09 1984-12-21 三井造船株式会社 Semi-submerged offshore structure
JPS6095395U (en) * 1983-12-08 1985-06-28 三井造船株式会社 Semi-submerged offshore structure
FR2970696B1 (en) * 2011-01-25 2013-02-08 Ideol ANNULAR FLOATING BODY

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL288939A (en) * 1900-01-01
DE828067C (en) * 1945-01-04 1952-01-14 Friedrich Kompe Non-lurching body
US3835800A (en) * 1968-02-13 1974-09-17 Santa Fe Drilling Co Twin hull semi-submersible derrick barge
US3886886A (en) * 1974-02-28 1975-06-03 Global Marine Inc Passive ship motion stabilization system with active assist for high amplitude motions
US3916811A (en) * 1974-08-29 1975-11-04 Sun Oil Co Pennsylvania Tide compensation system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1058208A (en) * 1974-06-10 1979-07-10 John B. Wright Pharmaceutical n,n'(phenylphenylene) dioxamic acid derivatives

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL288939A (en) * 1900-01-01
DE828067C (en) * 1945-01-04 1952-01-14 Friedrich Kompe Non-lurching body
US3835800A (en) * 1968-02-13 1974-09-17 Santa Fe Drilling Co Twin hull semi-submersible derrick barge
US3886886A (en) * 1974-02-28 1975-06-03 Global Marine Inc Passive ship motion stabilization system with active assist for high amplitude motions
US3916811A (en) * 1974-08-29 1975-11-04 Sun Oil Co Pennsylvania Tide compensation system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2443418A1 (en) * 1978-12-04 1980-07-04 Varitrac Ag SYSTEM FOR STABILIZING A FLOATING MACHINE CARRYING CRANES
FR2881102A1 (en) * 2005-01-21 2006-07-28 D2M Consultants S A Sa STABILIZED FLOATING SUPPORT
WO2006077311A3 (en) * 2005-01-21 2006-12-14 D2M Consultants S A Stabilized floating support
US7503728B2 (en) 2005-01-21 2009-03-17 D2M Consultants, S.A. Stabilized floating support

Also Published As

Publication number Publication date
AU2124677A (en) 1978-07-20
CA1075092A (en) 1980-04-08
JPS6257558B2 (en) 1987-12-01
DE2701605A1 (en) 1977-07-21
NL7700462A (en) 1977-07-21
JPS52111191A (en) 1977-09-17

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Legal Events

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TP Transmission of property