US3474749A - Floatable vessel - Google Patents

Floatable vessel Download PDF

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Publication number
US3474749A
US3474749A US709066A US3474749DA US3474749A US 3474749 A US3474749 A US 3474749A US 709066 A US709066 A US 709066A US 3474749D A US3474749D A US 3474749DA US 3474749 A US3474749 A US 3474749A
Authority
US
United States
Prior art keywords
vessel
column
superstructure
mooring
lines
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 - Lifetime
Application number
US709066A
Other languages
English (en)
Inventor
Robert Henry Williamson
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.)
Vickers Ltd
Original Assignee
Vickers Ltd
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 GB34262/65A external-priority patent/GB1106258A/en
Application filed by Vickers Ltd filed Critical Vickers Ltd
Application granted granted Critical
Publication of US3474749A publication Critical patent/US3474749A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B63B1/04—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with single hull
    • B63B1/048—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with single hull with hull extending principally vertically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
    • 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

Definitions

  • the invention is concerned with a floatable vessel consisting of an upright column carrying a ballast chamber positioned adjacent the lower end of the column, a buoyant superstructure slidably mounted on the column for movement between a lower position adjacent the ballast chamber and an upper position adjacent the upper end of the column and means for securing the superstructure in the upper position.
  • the invention provides a mooring arrangement consisting of a plurality of mooring lines connected to the vessel adjacent the lower end of the column and being arranged for attachment to anchorage points, the lines each extending over a support associated with the superstructure such that displacement of the latter along the column away from its lower end assists in tensioning the lines.
  • This invention relates to certain improvements in the floatable vessel forming the subject of co-pending patent application No. 569,617, now US. Patent No. 3,408,821, granted Nov. 5, 1968.
  • a floatable vessel including an upright column which carries a ballast chamber positioned at or near the lower end of the column, a buoyant superstructure which is slidably mounted On the column for movement between a lower position adjacent to the ballast chamber and an upper position at or near the upper end of the column and means for securing the superstructure in the upper position.
  • a vessel will be referred to hereafter as a Floatable vessel as defined.
  • the mooring lines should be initially taut if a satisfactory mooring of the vessel is to be achieved. If the vessel is moored by first attaching two of the lines to the vessel and then bringing the third and fourth lines and the vessel together, the third and fourth lines require to be tensioned against their anchors and the vessel against the other two lines and their respective anchors which entails considerable difficulty.
  • floatable vessel as defined, wherein the vessel is provided with a plurality of mooring lines connected to the vessel at or near the lower end of the column and being arranged for attachment to anchorage points, said lines each extending over a support associated with the superstructure, whereby displacement of the superstructure along the column away from its lower end assists in tensioning the lines.
  • FIGURE 1 illustrates the vessel described in the above mentioned patent in the operational condition and provided with the mooring lines in accordance with the present invention attached to anchorage points,
  • FIGURE 2 illustrates a plan view of the vessel with the superstructure removed
  • FIGURE 3 illustrates a detail of the vessel shown in FIGURES 1 and 2
  • FIGURE 4 illustrates a modification of the detail shown in FIGURE 3
  • FIGURES 5 to 8 illustrate the vessel at various stages in being converted from a towing condition to the operational condition before the latter condition is reached.
  • the vessel itself is of the construction described with reference to the FIGURES 1 and 2 of the drawing accompanying the above mentioned patent and will not be described in detail herein.
  • the vessel is composed of a column 1 provided with a ballast chamber 2 and carrying a buoyant superstructure 3.
  • the vessel is provided with four mooring lines 4 each composed of a rope (not shown) and a chain cable 5 by means of which the rope is attached to the vessel.
  • Each cable passes over a sprocket 6, and extends to a fixing point 7.
  • Each sprocket '6 is mounted on a mooring ring 8 by means of a bracket '9, the sprocket itself being rotatable on a pin 11 (FIG. 3).
  • the mooring ring encircles the column 1 and is connected to the superstructure 3 by two lifting cables 12.
  • the reminder of the mooring procedure is as follows.
  • the ballast chamber is first partly flooded and is allowed to sink to a position where the lifting cables 12 are fully extended to support the mooring ring 8 (FIGURE 6) and is further flooded slightly to cause the superstructure 3 to engage correctly with an associated collar 15 as described in the above mentioned patent, when the superstructure is locked to the collar (FIGURE 7).
  • ballast chamber is unballasted slightly to allow the vessel to rise to the operating position (FIG- URE 1), this final upward movement applying a tension to the mooring lines 4.
  • the locking of the mooring ring to the central column is arranged so that should buoyancy in the column and ballast chamber be lost, the column can release from the ring in a similar manner to the arrangement for detaching the superstructure from the column as outlined in the above mentioned US. patent.
  • the above arrangement greatly facilitates the mooring of the vessel in that the securing of the mooring ropes to the cables can be carried out under slack mooring line conditions.
  • the arrangement of the double purchase of the chains over approximately half the length of the vessel enables the mooring lines to be tensioned as a direct result of the conversion of the vessel from the towing to the operating condition.
  • the chain cables 5 may if desired be replaced by studlink cables 25 in which case the sprocket 6 would be replaced by toothed wheels 26, this being illustrated in FIGURE 4.
  • a floatable waterborne vessel including an upright column carrying a ballast chamber adjacent its lower end and a buoyant superstructure mounted on the column for movement therealong between a lower position near the ballast chamber and an upper position adjacent the upper end of the column and means for securing the superstructure in its upper position, the ballast chamber being floodable to convert the vessel from a transit condition in which the ballast chamber floats in the water with the superstructure in its lower position, to an intermediate condition in which the ballast chamber is sunk in the water to draw the column downwardly through the superstructure as it floats in the water until the superstructure is at a position adjacent the upper end of the column and is secured thereto by the securing means, and said chamber being partially unballastable to elevate the superstructure clear of the water, wherein the improvement comprises a plurality of spaced mooring lines connected to the vessel at or near the lower end of the column and being arranged for attachment to anchorage points, a mooring line support associated with the superstructure and movable upwardly therewith, and
  • a vessel as claimed in claim 1, wherein the support comprises a ring which encircles the column and is connected to the superstructure, said ring carrying, for each line, a rotatable support element over which the line passes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Check Valves (AREA)
  • Bridges Or Land Bridges (AREA)
  • Revetment (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
US709066A 1965-08-10 1968-02-28 Floatable vessel Expired - Lifetime US3474749A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB34262/65A GB1106258A (en) 1965-08-10 1965-08-10 Improved floatable vessel
GB05839/67A GB1169262A (en) 1965-08-10 1967-04-06 Improved floatable vessel

Publications (1)

Publication Number Publication Date
US3474749A true US3474749A (en) 1969-10-28

Family

ID=10066458

Family Applications (1)

Application Number Title Priority Date Filing Date
US709066A Expired - Lifetime US3474749A (en) 1965-08-10 1968-02-28 Floatable vessel

Country Status (6)

Country Link
US (1) US3474749A (enrdf_load_stackoverflow)
ES (1) ES351391A2 (enrdf_load_stackoverflow)
FR (1) FR94851E (enrdf_load_stackoverflow)
GB (1) GB1169262A (enrdf_load_stackoverflow)
NL (1) NL6804582A (enrdf_load_stackoverflow)
NO (1) NO122577B (enrdf_load_stackoverflow)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3523703A (en) * 1969-03-19 1970-08-11 Sternco Ind Inc Miter corner construction
US3946684A (en) * 1971-01-18 1976-03-30 Sumner Maurice N Semi-submersible jackup apparatus
US3952684A (en) * 1974-05-21 1976-04-27 Sun Oil Company (Delaware) Adjustable mooring system
JPS5131435B1 (enrdf_load_stackoverflow) * 1971-03-09 1976-09-07
US3996754A (en) * 1973-12-14 1976-12-14 Engineering Technology Analysts, Inc. Mobile marine drilling unit
US4142819A (en) * 1976-12-03 1979-03-06 Compagnie Generale Pour Les Developpements Operationnels Des Richesses Sous-Marines "C.G.Doris" Platform for installation at sea or on a body of water
US4217848A (en) * 1976-09-11 1980-08-19 Marine Service Gmbh Floating gas liquefaction installation
US4400111A (en) * 1981-02-27 1983-08-23 Deutsche Babcock Aktiengesellschaft Arrangement for raising and lowering a floating offshore platform
US4723875A (en) * 1987-02-13 1988-02-09 Sutton John R Deep water support assembly for a jack-up type platform
US4969776A (en) * 1986-02-24 1990-11-13 British Gas Plc Offshore platforms
US5215410A (en) * 1990-08-14 1993-06-01 Norwegian Contractors Method and means for controlled submersion and positioning of large, heavy gravity elements on the sea bottom
US5833396A (en) * 1995-06-02 1998-11-10 Technip Geoproduction Jack-up offshore drilling or production oil platform
US6352116B1 (en) * 1998-07-17 2002-03-05 Petroleum Geo-Services As Riser moving and guiding using shuttle plates
US6539888B1 (en) * 1998-12-23 2003-04-01 Buitendijk Holding B.V. Working ship
WO2002098725A3 (en) * 2001-06-01 2003-05-22 Univ Johns Hopkins Telescoping spar platform and method of using same
US20050191136A1 (en) * 2004-02-27 2005-09-01 Qi Xu Single column extendable draft offshore platform
US20110209875A1 (en) * 2008-06-09 2011-09-01 Timothy John Crome Installation for the extraction of fluid from an expanse of water, and associated method
US20120093587A1 (en) * 2010-10-19 2012-04-19 Horton Wison Deepwater, Inc. Offshore tower for drilling and/or production
US20130298815A1 (en) * 2010-11-25 2013-11-14 Cobus Beheer B.V. Floating marine structure
CN105416511A (zh) * 2015-10-20 2016-03-23 大连连船重工有限公司 半潜插桩式海上平台定位系统

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3031997A (en) * 1957-04-30 1962-05-01 William A Nesbitt Floating platform
US3294051A (en) * 1963-11-29 1966-12-27 Cie Generale D Equipements Pou Apparatus for drilling in deep water

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3031997A (en) * 1957-04-30 1962-05-01 William A Nesbitt Floating platform
US3294051A (en) * 1963-11-29 1966-12-27 Cie Generale D Equipements Pou Apparatus for drilling in deep water

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3523703A (en) * 1969-03-19 1970-08-11 Sternco Ind Inc Miter corner construction
US3946684A (en) * 1971-01-18 1976-03-30 Sumner Maurice N Semi-submersible jackup apparatus
JPS5131435B1 (enrdf_load_stackoverflow) * 1971-03-09 1976-09-07
US3996754A (en) * 1973-12-14 1976-12-14 Engineering Technology Analysts, Inc. Mobile marine drilling unit
US3952684A (en) * 1974-05-21 1976-04-27 Sun Oil Company (Delaware) Adjustable mooring system
US4217848A (en) * 1976-09-11 1980-08-19 Marine Service Gmbh Floating gas liquefaction installation
US4142819A (en) * 1976-12-03 1979-03-06 Compagnie Generale Pour Les Developpements Operationnels Des Richesses Sous-Marines "C.G.Doris" Platform for installation at sea or on a body of water
US4400111A (en) * 1981-02-27 1983-08-23 Deutsche Babcock Aktiengesellschaft Arrangement for raising and lowering a floating offshore platform
US4969776A (en) * 1986-02-24 1990-11-13 British Gas Plc Offshore platforms
US4723875A (en) * 1987-02-13 1988-02-09 Sutton John R Deep water support assembly for a jack-up type platform
US5215410A (en) * 1990-08-14 1993-06-01 Norwegian Contractors Method and means for controlled submersion and positioning of large, heavy gravity elements on the sea bottom
US5833396A (en) * 1995-06-02 1998-11-10 Technip Geoproduction Jack-up offshore drilling or production oil platform
US6352116B1 (en) * 1998-07-17 2002-03-05 Petroleum Geo-Services As Riser moving and guiding using shuttle plates
US6539888B1 (en) * 1998-12-23 2003-04-01 Buitendijk Holding B.V. Working ship
WO2002098725A3 (en) * 2001-06-01 2003-05-22 Univ Johns Hopkins Telescoping spar platform and method of using same
US20050191136A1 (en) * 2004-02-27 2005-09-01 Qi Xu Single column extendable draft offshore platform
US6945737B1 (en) 2004-02-27 2005-09-20 Technip France Single column extendable draft offshore platform
WO2005092700A1 (en) * 2004-02-27 2005-10-06 Technip France Single column extendable draft offshore platform
US20110209875A1 (en) * 2008-06-09 2011-09-01 Timothy John Crome Installation for the extraction of fluid from an expanse of water, and associated method
US8881826B2 (en) * 2008-06-09 2014-11-11 Technip France Installation for the extraction of fluid from an expanse of water, and associated method
US20120093587A1 (en) * 2010-10-19 2012-04-19 Horton Wison Deepwater, Inc. Offshore tower for drilling and/or production
US9758941B2 (en) * 2010-10-19 2017-09-12 Horton Wison Deepwater, Inc. Offshore tower for drilling and/or production
US20130298815A1 (en) * 2010-11-25 2013-11-14 Cobus Beheer B.V. Floating marine structure
US9499240B2 (en) * 2010-11-25 2016-11-22 Cobus Beheer B.V. Floating marine structure
CN105416511A (zh) * 2015-10-20 2016-03-23 大连连船重工有限公司 半潜插桩式海上平台定位系统

Also Published As

Publication number Publication date
NL6804582A (enrdf_load_stackoverflow) 1968-10-07
ES351391A2 (es) 1969-06-01
NO122577B (enrdf_load_stackoverflow) 1971-07-12
FR94851E (fr) 1970-01-16
GB1169262A (en) 1969-11-05

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