US3747136A - Self-mooring of a ship to a one-point mooring buoy - Google Patents

Self-mooring of a ship to a one-point mooring buoy Download PDF

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Publication number
US3747136A
US3747136A US00125976A US3747136DA US3747136A US 3747136 A US3747136 A US 3747136A US 00125976 A US00125976 A US 00125976A US 3747136D A US3747136D A US 3747136DA US 3747136 A US3747136 A US 3747136A
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US
United States
Prior art keywords
mooring
ship
rope
buoy
floating
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
US00125976A
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English (en)
Inventor
A Macdonald
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.)
Shell USA Inc
Original Assignee
Shell Oil Co
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 Shell Oil Co filed Critical Shell Oil Co
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Publication of US3747136A publication Critical patent/US3747136A/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 
    • B63B22/00—Buoys
    • B63B22/02—Buoys specially adapted for mooring a vessel
    • B63B22/021—Buoys specially adapted for mooring a vessel and for transferring fluids, e.g. liquids

Definitions

  • the invention relates to a method and apparatus for the self-mooring of a ship to a one-point mooring buoy for loading or unloading a fluid into or from a ship.
  • One-point mooring buoys for loading or unloading a fluid into or from a ship are widely known and are being used in increasing numbers.
  • the ship is fastened by its bow to the one-point mooring buoy by means of a mooring cable in such a manner that the ship is capable of swinging around the buoy with its bow pointing towards the buoy.
  • the one-point mooring buoy is provided with the mooring cable and with a hose floating on the water, which hose is coupled to the ship after the latter has moored to the one-point mooring buoy, whereupon the loading or unloading of the fluid via the hose and the one-point mooring buoy is commenced.
  • For the purpose of mooring the ship to the one-point mooring buoy and for connecting the floating hose to the ship use is normally made of a manned mooring launch.
  • the invention relates to a method for the self-mooring of a ship to a one-point mooring buoy for loading or unloading of a fluid into or from a ship, wherein a rope is secured to the free ends of the buoys mooring cable and floating hose and wherein means offering resistance to the water current are secured to the rope in such a manner that a loop is formed by the rope maintaining the buoys mooring cable and floating hose permanently in a stretched condition by forces acting on.
  • a system for use with the above method comprises, according to the invention, a one-point mooring buoy,
  • a rope is secured to the free ends of the buoys mooring cable and floating hose and wherein means offering resistance to the water current are secured to the rope in such a manner that a loop is formed by the rope and that the mooring cable and the floating hose are maintained in a stretched condition.
  • FIG. I is a top plan view of a mooring system according to the invention.
  • FIG. 2 shows in detail a side view of a cone for use in the system according to the invention.
  • FIG. 3 shows in detail a top plan view of a drag'for use in the system according to the invention.
  • FIG. 4 shows a side view of the drag according to FIG. 3.
  • FIG. 1 a conventional one-point mooring buoy l is shown schematically.
  • This buoy l is floating in the water 2 and is anchored in a conventional manner to the seabed (not shown).
  • the buoy 1 is provided with a pair of floating hoses 3 and 4 of conventional construction.
  • the buoy l is provided with a pair of mooring cables 5 and 6, for example made of nylon.
  • wires 7, 8 and 9 an end of a rope 10 is connected to the free ends of the floating hoses 3 and'4.
  • the other end of the rope 10 is connected to the free ends of the mooring cables 5 and 6 by means of wires 11 and 12.
  • a suitable material for the rope 10 is, for example, polypropylene.
  • a hollow cone l3 and a drag 14 are secured to the rope 10, as shown schematically in FIG. 1, by means of nylon cable 15 respectively 16.
  • the hollow cone 13 is shown more in detail in FIG. 2. It is, for example, made of a suitable textile material or plastic sheet material.
  • the cone is open at both ends so that water is allowed to flow through the inside of the cone.
  • the large end of the cone is provided with cables 18, secured to the periphery of the cone.
  • the free ends of the cables are interconnected by means of a ring 19.
  • Another ring 20 is connected to ring 119 by means of a rope 21.
  • the drag 14 consists of a rigid plate 25 provided with a number of bars 26. The free ends of the bars 26 are interconnected by means of a ring 27. Another ring 28 is secured to ring 27.
  • the cone 13 is secured to the rope 10 by means of the nylon cable 15.
  • One end of the nylon cable 15 is secured to the ring 20 and the other end of the nylon cable 15 is secured to the rope 10.
  • the drag 14 is secured to the rope 10 by means of the nylon cable 16.
  • One end of the nylon cable 16 is secured to the ring 28 and the other end of the nylon cable 16 is secured to the rope 10.
  • the floating hoses 3 and 4 and the mooring cables 5 and 6 are connected to the turntable of the one-point I mooring buoy 1, which is conventional.
  • the cone 13 and the drag 14 are devices offering resistance to the flow of the water. The effect of the friction of the tidal stream or current coupled with any wave action of the cone l3 and on the drag 14 will permanently keep the rope 10, the mooring cables 5 and 6 and the hoses 3 and 4 in a stretched condition. As shown in FIG. 1, the rope 10 is caused to form a loop.
  • the unmooring procedure of the ship is as follows.
  • one end of the rope 10 is again connected to the ends of the hoses 3 and 4 and the other end of the rope 10 is again connected to the ends of the mooring cables 5 and 6.
  • the floating hoses 3 and 4 are lowered or slipped by means of slip ropes into the sea and allowed to stream parallel to the ship.
  • the mooring cables 5 and 6 are then released from the ships bollards and as the ship gathers sternway during unberthing, the rope 10 remaining onboard is payed out from about midship and the cone l3 and drag 14 are launched. Then the berth is left ready to receive the next self-mooring ship.
  • An apparatus for self-mooring of a ship to a onepoint mooring buoy for loading or unloading a fluid into or from a ship comprising:
  • a mooring cable being connected to said mooring buoy
  • a means offering resistance to the water current being connected to said rope comprising first means for maintaining said mooring cable and floating hose permanently in a stretched condition and second means spaced from said first means for forming an open loop with said rope.
  • a method for self-mooring of a ship to a one-point mooring buoy for loading or unloading a fluid into or from a ship which comprises:

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Farming Of Fish And Shellfish (AREA)
US00125976A 1970-04-10 1971-03-19 Self-mooring of a ship to a one-point mooring buoy Expired - Lifetime US3747136A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1715870 1970-04-10

Publications (1)

Publication Number Publication Date
US3747136A true US3747136A (en) 1973-07-24

Family

ID=10090309

Family Applications (1)

Application Number Title Priority Date Filing Date
US00125976A Expired - Lifetime US3747136A (en) 1970-04-10 1971-03-19 Self-mooring of a ship to a one-point mooring buoy

Country Status (2)

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US (1) US3747136A (enrdf_load_stackoverflow)
GB (1) GB1301749A (enrdf_load_stackoverflow)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2537321A (en) * 1946-02-09 1951-01-09 Robert S Walton Fish line retarding device and release
US2721530A (en) * 1953-05-12 1955-10-25 Shell Dev Anchor
US2744352A (en) * 1954-05-18 1956-05-08 Arvid R Holgerson Water kite
US2942371A (en) * 1957-10-04 1960-06-28 Canadian Patents Dev Dual-purpose midwater-bottom otterboard
US3354479A (en) * 1964-12-18 1967-11-28 Shell Oil Co Loading buoy having loading arms
US3466680A (en) * 1967-07-14 1969-09-16 Air Logistics Corp Apparatus for loading and unloading offshore vessels
US3595195A (en) * 1968-05-08 1971-07-27 Shell Oil Co Offshore vessel mooring system
US3619832A (en) * 1968-08-02 1971-11-16 Shell Oil Co Single buoy mooring for use in loading and unloading ship

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2537321A (en) * 1946-02-09 1951-01-09 Robert S Walton Fish line retarding device and release
US2721530A (en) * 1953-05-12 1955-10-25 Shell Dev Anchor
US2744352A (en) * 1954-05-18 1956-05-08 Arvid R Holgerson Water kite
US2942371A (en) * 1957-10-04 1960-06-28 Canadian Patents Dev Dual-purpose midwater-bottom otterboard
US3354479A (en) * 1964-12-18 1967-11-28 Shell Oil Co Loading buoy having loading arms
US3466680A (en) * 1967-07-14 1969-09-16 Air Logistics Corp Apparatus for loading and unloading offshore vessels
US3595195A (en) * 1968-05-08 1971-07-27 Shell Oil Co Offshore vessel mooring system
US3619832A (en) * 1968-08-02 1971-11-16 Shell Oil Co Single buoy mooring for use in loading and unloading ship

Also Published As

Publication number Publication date
GB1301749A (enrdf_load_stackoverflow) 1973-01-04

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