US3619832A - Single buoy mooring for use in loading and unloading ship - Google Patents

Single buoy mooring for use in loading and unloading ship Download PDF

Info

Publication number
US3619832A
US3619832A US844998A US3619832DA US3619832A US 3619832 A US3619832 A US 3619832A US 844998 A US844998 A US 844998A US 3619832D A US3619832D A US 3619832DA US 3619832 A US3619832 A US 3619832A
Authority
US
United States
Prior art keywords
floating
buoy
conduit
conduits
fluid
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
US844998A
Other languages
English (en)
Inventor
Simon Westra
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
Application granted granted Critical
Publication of US3619832A publication Critical patent/US3619832A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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 structure for facilitating the loading and unloading of ships and more particularly to single buoy mooring for transporting fluids to and from tankers or similar vessels.
  • Single buoy moorings for loading fluid into a ship, such as a tanker, or unloading fluid from such a ship, are known in the art.
  • These known single buoy mooring buoys which are in commercial use, are provided with flexible fluid conduits floating in the water in order to enable the ship to make a fluid communication between the ship and the buoy for loading or unloading a fluid.
  • the floating flexible fluid conduit is easily damaged and is very expensive and thus it is desirable to find means to extend its useful life as much as possible.
  • the single buoy mooring comprises a buoy having a part rotatably secured in such a way that it is rotatable around a vertical axis, said part being provided with means for mooring a ship thereto.
  • the buoy is anchored to the bottom of a body of water and a fluid supply or discharge conduit is operatively associated with the buoy.
  • a fluid conduit is secured to the rotatable part and a coupling is provided between the fluid supply or discharge conduit and the fluid conduit secured to the rotatable part, said coupling allowing rotation around a vertical axis.
  • a flexible fluid conduit floating in the water is connected at one of its ends by means of an elbow piece and a pipe swivel to the fluid conduit secured to the rotatable part, the pipe swivel allowing rotation around a vertical axis.
  • the pipe part of the elbow piece which is adjacent to the floating flexible fluid conduit is inclined to the water surface and that section of the floating flexible fluid conduit adjacent to the elbow piece is of such buoyancy that it floats below the Water surface.
  • the remaining part of the floating flexible fluid conduit has such buoyancy that it floats at the water surface.
  • FIG. 1 shows a top plan view of a single buoy mooring according to the invention
  • FIG. 2 shows a side view of the same single buoy mooring as shown in FIG. 1;
  • FIG. 3 shows schematically a top plan view of the single buoy mooring according to the invention, disclosing two diflerent positions of the floating flexible fluid conduits;
  • FIG. 4 shows schematically a side view of the single buoy mooring as shown in FIG. 3.
  • a hollow cylindrical floating body 1 is provided with a rim 2 having means for securing anchor cables (not shown) thereto.
  • the elements 1 and 2 form together a buoy suitable to be anchored in a body of water at a desired location.
  • a part 3 is rotatably secured in such a way that it is rotatable around a vertical axis.
  • the rotatable part 3 has the shape of a turntable.
  • the rotatable part 3 is provided with means 4, such as bollards or similar devices, for securing mooring cables or chains of a ship thereto.
  • a fluid supply or discharge conduit 5 is connected to the buoy, said conduit 5 leading to a reservoir (not shown), for example, to a reservoir located on-shore.
  • On the rotatable part 3 is secured a fluid conduit 6 and a fluid conduit 6'.
  • the fluid conduit 6 and the fluid conduit 6 are each in communication with the fluid supply or discharge conduit 5 through a coupling 7.
  • the coupling 7 is constructed in such a way that it allows rotation around a vertical axis.
  • valves 8 and 8' are present.
  • the respective lower ends of the fluid conduits 6 and 6' are each provided with a pipe swivel 9' and 9', connecting an elbow piece 10 and 10' to the fluid conduit 6 and 6' in such a way that each elbow piece 10 and 10' is rotatable around a vertical axis.
  • the lower pipe parts 11 and 11 of the elbow pieces 10 and 10' are inclined to the water surface 12.
  • the longitudinal axis of the pipe parts 11 and 11' is at an angle of 30 degrees with the water surface 12.
  • the floating flexible fluid conduits 13 and 13' comprise a number of sections of hose 14, 15, 16, 17, 18 and 14, 15', 16', 17, 18 interconnected in the usual manner by metal flanges 19 and 19.
  • the said sections are provided with a number of annular floats 20 and 20 surrounding the conduits.
  • These annular floats can suitably consist of foamed plastic.
  • the hose sections 14 and 14' are connected by means of flanges 21 and 21' to the pipe parts 11 and 11.
  • the number of floats on the sections 14 and 15 and on the sections 14 and 15' is so chosen that the buoyancy of these sections, when filled with fluid to be pumped through it, is less than the buoyancy of the respective remaining parts of the floating flexible conduits 13 and 13, when filled with fluid to be pumped through them, the result being that, during normal use, the sections 14 and 15 and the sections 14' and 15' are floating below the water surface 12, whereas the remaining parts of the floating conduit 13 and 13' (in the drawings the sections 16, 17, 18 and 16, 17', 18') are floating at the water surface 12.
  • part of the floating flexible fluid conduits as represented by the sections 14 and 15 and the sections 14' and 15', are slightly curved, when at rest.
  • that part of the hose section 14 which is adjacent to the elbow piece 10 has a gradually diminishing wall thickness, so as to prevent hose kinking beyond the built-in steel nipple.
  • the special features as claimed have the advantage that the lifetime of the floating flexible fluid conduits is substantially increased as compared with the known single buoy moorings.
  • attention is drawn to the fact that, because of the action of the waves, movement of the floating flexible fluid conduits 13 and 13 inwardly and outwardly relative to the buoy 1 normally occurs. This relative movement tends to cause damage to that part of the floating conduits 13 and 13' where the conduits are secured to the buoy.
  • the elbow piece 10 and 10' and the pipe swivels 9 and 9' the curved part of the floating conduits 13 and 13' will be able to move vertically downward and at the same time laterally in a horizontal direction as shown in FIGS.
  • FIGS. 3 and 4 as the conduits 13 and 13 move inwardly relative to the buoy 1.
  • the original position of the floating flexible fluid conduits 13 and 13 is shown in full lines, whereas the position of the floating flexible fluid conduits l3 and 13', after relative inward movement has occurred, is shown in dotted lines.
  • a single buoy mooring of the type which is anchored to the bottom of a body of water to provide an offshore fluid transfer facility for ships comprising:
  • a buoy having a part rotatably secured so that it is rotatable around a vertical axis, said part being provided with means for mooring a ship thereto;
  • first flexible fluid conduit floating in the water and connected with one of its ends by means of a first elbow piece and a first pipe swivel to the first fluid conduit secured to the rotatable part, the first pipe swivel allowing rotation of the first elbow piece around a vertical axis, said first elbow piece including first pipe means adjacent to the first floating flexible fluid conduit inclined to the water surface; said floating flexible conduit including a section vadjacent to the elbow piece having such buoyancy that it floats below the water surface, and the remaining part of the first floating flexible fluid conduit having such buoyancy that it floats at the water surface; second flexible fluid conduit floating in the water side by side with the first flexible conduit and connected with one of its ends by means of a second elbow piece and a second pipe swivel to the second fluid conduit secured to the rotatable part, the second pipe swivel allowing rotation of the second elbow piece around a vertical axis, said second elbow piece including second pipe means adjacent to the second floating flexible fluid conduit inclined to the water surface; said second floating flexible flexible

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Catching Or Destruction (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
US844998A 1968-08-02 1969-07-25 Single buoy mooring for use in loading and unloading ship Expired - Lifetime US3619832A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB37053/68A GB1177908A (en) 1968-08-02 1968-08-02 Single Buoy Mooring for Loading or Unloading Ships, in particular Tankers

Publications (1)

Publication Number Publication Date
US3619832A true US3619832A (en) 1971-11-16

Family

ID=10393365

Family Applications (1)

Application Number Title Priority Date Filing Date
US844998A Expired - Lifetime US3619832A (en) 1968-08-02 1969-07-25 Single buoy mooring for use in loading and unloading ship

Country Status (10)

Country Link
US (1) US3619832A (ja)
JP (1) JPS4841318B1 (ja)
BR (1) BR6911216D0 (ja)
ES (1) ES370110A1 (ja)
FR (1) FR2014932A1 (ja)
GB (1) GB1177908A (ja)
NL (1) NL157865B (ja)
NO (1) NO128857B (ja)
OA (1) OA03107A (ja)
SU (1) SU364149A3 (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3747136A (en) * 1970-04-10 1973-07-24 Shell Oil Co Self-mooring of a ship to a one-point mooring buoy
US4310937A (en) * 1979-08-30 1982-01-19 Amtel, Inc. Mooring terminal with top mounted fluid swivel
US5113778A (en) * 1988-11-28 1992-05-19 Golar-Nor Offshore As System for transferring fluids from a piping system in a ship's hull to a turning device, and vice versa
US20040077234A1 (en) * 2001-01-24 2004-04-22 Philippe Lavagna Wave motion absorbing offloading system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS565652Y2 (ja) * 1978-02-01 1981-02-06
GB2043008B (en) * 1979-03-08 1983-04-13 Bluewater Terminal Systems Nv Permanent single-point mooring system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3747136A (en) * 1970-04-10 1973-07-24 Shell Oil Co Self-mooring of a ship to a one-point mooring buoy
US4310937A (en) * 1979-08-30 1982-01-19 Amtel, Inc. Mooring terminal with top mounted fluid swivel
US5113778A (en) * 1988-11-28 1992-05-19 Golar-Nor Offshore As System for transferring fluids from a piping system in a ship's hull to a turning device, and vice versa
US20040077234A1 (en) * 2001-01-24 2004-04-22 Philippe Lavagna Wave motion absorbing offloading system
US6916218B2 (en) * 2001-01-24 2005-07-12 Single Buoy Moorings Inc. Wave motion absorbing offloading system

Also Published As

Publication number Publication date
GB1177908A (en) 1970-01-14
DE1939013A1 (de) 1970-02-05
BR6911216D0 (pt) 1973-01-02
NL6911609A (ja) 1970-02-04
JPS4841318B1 (ja) 1973-12-05
OA03107A (fr) 1970-12-15
NO128857B (ja) 1974-01-21
NL157865B (nl) 1978-09-15
DE1939013B2 (de) 1977-06-08
SU364149A3 (ja) 1972-12-25
ES370110A1 (es) 1971-04-01
FR2014932A1 (ja) 1970-04-24

Similar Documents

Publication Publication Date Title
US3641602A (en) Single anchor leg single point mooring system
US3440671A (en) Floating device for loading or unloading a ship in open water
US3339512A (en) Multiple storage and redistribution facility
US5288253A (en) Single point mooring system employing a submerged buoy and a vessel mounted fluid swivel
US3614869A (en) Pivoted tower single point mooring systems
US3515182A (en) One-point mooring system for loading or unloading a fluid into or from a ship
US3354479A (en) Loading buoy having loading arms
US3894567A (en) Offshore vessel mooring
US3708811A (en) Single anchor leg single point mooring system
US3750723A (en) Single point mooring system
US3074082A (en) Terminal station and system and method
US3899990A (en) Systems for anchoring ships at sea
GB1286759A (en) Improvements in or relating to off-shore loading and unloading installations for ships
US3366982A (en) Offshore floating terminal
US3651525A (en) One-point mooring buoy for loading or unloading ships
US3455270A (en) Protective dome for underwater mooring swivel
US3619832A (en) Single buoy mooring for use in loading and unloading ship
AU701392B2 (en) Arrangement in a loading/unloading buoy for use in shallow waters
US3426803A (en) Submerged floatable hoses for transporting oil and other liquids on the sea
US3519036A (en) Apparatus for transporting fluids between a submerged storage tank and a floating vessel
US3372409A (en) Apparatus for transporting fluids from a marine bottom to a floating vessel
US4546721A (en) Submerged single point mooring system
US3093167A (en) Offshore combination ship mooring and ship loading apparatus-bow mooring
US3837380A (en) Marine loading/unloading system
US3674062A (en) Offshore loading and unloading of tankers