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EP0079404B2 - A single point mooring buoy with rigid arm - Google Patents
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EP0079404B2 - A single point mooring buoy with rigid arm - Google Patents

A single point mooring buoy with rigid arm Download PDF

Info

Publication number
EP0079404B2
EP0079404B2 EP81201274A EP81201274A EP0079404B2 EP 0079404 B2 EP0079404 B2 EP 0079404B2 EP 81201274 A EP81201274 A EP 81201274A EP 81201274 A EP81201274 A EP 81201274A EP 0079404 B2 EP0079404 B2 EP 0079404B2
Authority
EP
European Patent Office
Prior art keywords
mooring
rigid arm
vessel
buoy
tension members
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
EP81201274A
Other languages
German (de)
French (fr)
Other versions
EP0079404A1 (en
EP0079404B1 (en
Inventor
Jacob De Baan
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.)
Bluewater Terminal Systems NV
Original Assignee
Bluewater Terminal Systems NV
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8188163&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0079404(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Bluewater Terminal Systems NV filed Critical Bluewater Terminal Systems NV
Priority to EP81201274A priority Critical patent/EP0079404B2/en
Priority to DE8181201274T priority patent/DE3174847D1/en
Priority to OA57840A priority patent/OA07247A/en
Priority to DK507682A priority patent/DK154335C/en
Priority to ES1982268488U priority patent/ES268488Y/en
Priority to PH28146A priority patent/PH21279A/en
Priority to NO823830A priority patent/NO154954C/en
Priority to BR8206620A priority patent/BR8206620A/en
Priority to JP57201788A priority patent/JPS5897585A/en
Publication of EP0079404A1 publication Critical patent/EP0079404A1/en
Publication of EP0079404B1 publication Critical patent/EP0079404B1/en
Application granted granted Critical
Priority to SG313/88A priority patent/SG31388G/en
Publication of EP0079404B2 publication Critical patent/EP0079404B2/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
    • B63B22/025—Buoys specially adapted for mooring a vessel and for transferring fluids, e.g. liquids and comprising a restoring force in the mooring connection provided by means of weight, float or spring devices

Definitions

  • the invention relates to a mooring system for mooring a vessel on the surface of a body of water comprising a mooring point having buoyancy and being anehored to the floor of the body of water and a rigid arm structure, connected at one end to said mooring point and at the other end to the respective, ballasted, ends of two tension members, one on each side of the vessel hill.
  • Such a mooring system is known from FR-A-2.420.475, fig.7 and 8.
  • the mooring point is a tower structure which is kept upright by its own buoyancy and anehored to the floor of the body of water by means of a universal joint.
  • the upper end of this tower supports by means of a horizontal pivot axis two rigid arms which are at their respective other ends via respective horizontal pivot axes connected to the vertical tension members of which the other ends are the bow of the vessel interconnected by a further horizontal axis.
  • Such a mooring system allows a limited movement in the longitudinal direction of the vessel and provides a restoring force when the vessel moves towards the mooring point and away from it.
  • this mooring system is in fact a rigid structure so that rolling movements of the moored vessel impart very severe bending moments on the entire structure resulting in a heavy loading of the various parts and pivots and a rapid wear therof, the more so because they are constantly subjected to the corrosive influence of the seawater.
  • the invention aims to provide an improved mooring system of the abovementioned kind.
  • the mooring point is a floating buoy having a limited lateral stability and anchored by means of anchor chains or anchor cables
  • the tension members are pivotable tension members such as chains of cables
  • the rigid arm structure is Y-shaped each vessel end therof being connected to a tension member, the arrangement being such as to allow a rotational movement around the longitudinal axis of the Y-shaped structure.
  • the invention is elucidated on the hand of the drawing.
  • the figure shows the vessel 1 floating on a body of water 2, and moored by means of two pivotable tension members 6, 7, a rigid arm 15 and a floating mooring buoy 3 which is anchored by one of more anchor chains 5.
  • the single point mooring buoy 3 is of a type known as such and consists of a body 4 on which the turntable 8 is free to rotate about the vertical axis A-A of the buoy body 4.
  • the buoy body 4 is attached to the floor of the body of water 2 by means of one or more anchor chains 5.
  • the rigid arm 15 is in this embodiment attached to the mooring buoy 3 by means of the hinges 9. These hinges 9 allow relative movement between the buoy 3 and the rigid arm 15 about the horizontal axis B-B. Furthermore, the arrangement allows rotational movement of the rigid arm 15 around its longitudinal axis by virtue of the limited lateral stability of the mooring buoy 3. A less practical solution would be to incorporate an axial rotational connection in the rigid arm 15 such as the one indicated with reference numeral 10.
  • the rigid arm 15 is 6-shaped and the two side arms 11-12 incorporate ballasting arrangements 13, 14. This implies that the two side arms 11, 12 can be ballasted or alternatively deballasted, in which case rigid arm 15 can become independently booyant.
  • Two pivotable tension members 6, 7 such as chain or cables connect the two side arms 11, 12 to the vessel 1. These tension members 6, 7 run from the ballasting members 13, 14 upwards through hawses 19 to fixing points 22 on deck 21 of the vessel 1. Any rolling movement of the vessel 1 is thus smoothed out by the up-and-down movement of the side arms 11, 12 causing the middle leg of the Y-shaped rigid arm to oscillate about its axis.
  • a mooring hawser 18 connects the single point mooring buoy 3 to a fixing point 24 on deck of the vessel 1. This is not essential but provides both an additional mooring facility and a factor of safety in the mooring arrangement.
  • the product fluid is carried to the single point mooring buoy 3 by means of the submarine riser 16. It is then transported to the vessel 1 by means of the floating hose string 17.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
  • Materials For Medical Uses (AREA)
  • Prostheses (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Description

  • The invention relates to a mooring system for mooring a vessel on the surface of a body of water comprising a mooring point having buoyancy and being anehored to the floor of the body of water and a rigid arm structure, connected at one end to said mooring point and at the other end to the respective, ballasted, ends of two tension members, one on each side of the vessel hill.
  • Such a mooring system is known from FR-A-2.420.475, fig.7 and 8. In this known mooring system the mooring point is a tower structure which is kept upright by its own buoyancy and anehored to the floor of the body of water by means of a universal joint. The upper end of this tower supports by means of a horizontal pivot axis two rigid arms which are at their respective other ends via respective horizontal pivot axes connected to the vertical tension members of which the other ends are the bow of the vessel interconnected by a further horizontal axis.
  • Such a mooring system allows a limited movement in the longitudinal direction of the vessel and provides a restoring force when the vessel moves towards the mooring point and away from it. However, for rolling movements of the vessel this mooring system is in fact a rigid structure so that rolling movements of the moored vessel impart very severe bending moments on the entire structure resulting in a heavy loading of the various parts and pivots and a rapid wear therof, the more so because they are constantly subjected to the corrosive influence of the seawater.
  • The invention aims to provide an improved mooring system of the abovementioned kind. To this end according to the invention the mooring point is a floating buoy having a limited lateral stability and anchored by means of anchor chains or anchor cables, the tension members are pivotable tension members such as chains of cables and the rigid arm structure is Y-shaped each vessel end therof being connected to a tension member, the arrangement being such as to allow a rotational movement around the longitudinal axis of the Y-shaped structure.
  • This results into a mooring system which has, as far as the counteracting of movements toward and away from the mooring point is concerned, the same advantages as the prior art mooring system but of which the structure is subjected to much smaller forces and loadings than in the prior art mooring system; moreover the whole has less pivot points and is considerable simpler. Rolling movements of the vessel do not result into heavy loading and the resultant wear and tear of the structure, the buoy simply rolling together with the rigid arm structure around the longitudinal axis thereof. Such rolling movements of the vessels are smoothed out by the up and down movements of the arms of the Y-shaped structure. Another, however far more impractical, solution would be to provide an axial rotational connection in the rigid arm.
  • It is observed that mooring systems with a floating buoy are known in itself from NL-A-66.00321 and 72.07903. These known mooring systems lack the combination of the rigid arm and in the mooring system according to NL-A-6600321 the floating buoy has a considerable lateral stability so that the rigid arm is subjected by very heavy forces resulting from rolling movements of the vessel. Consequently this structure must have considerable inherent strength and stiffness and a heavy hinge structure at the end which is connected to the vessel to provide adequate strength and stability, resulting in an expensive construction.
  • In the mooring system according to NL-A-7207903 the buoy has less lateral stability but this mooring system has the drawback of a considerable resistance against sideways (swaying) movements of the vessel so that here, too, the structure must satisfy the demands as outlined above.
  • The invention is elucidated on the hand of the drawing.
  • The figure shows the vessel 1 floating on a body of water 2, and moored by means of two pivotable tension members 6, 7, a rigid arm 15 and a floating mooring buoy 3 which is anchored by one of more anchor chains 5. The single point mooring buoy 3 is of a type known as such and consists of a body 4 on which the turntable 8 is free to rotate about the vertical axis A-A of the buoy body 4. The buoy body 4 is attached to the floor of the body of water 2 by means of one or more anchor chains 5.
  • The rigid arm 15 is in this embodiment attached to the mooring buoy 3 by means of the hinges 9. These hinges 9 allow relative movement between the buoy 3 and the rigid arm 15 about the horizontal axis B-B. Furthermore, the arrangement allows rotational movement of the rigid arm 15 around its longitudinal axis by virtue of the limited lateral stability of the mooring buoy 3. A less practical solution would be to incorporate an axial rotational connection in the rigid arm 15 such as the one indicated with reference numeral 10.
  • The rigid arm 15 is 6-shaped and the two side arms 11-12 incorporate ballasting arrangements 13, 14. This implies that the two side arms 11, 12 can be ballasted or alternatively deballasted, in which case rigid arm 15 can become independently booyant. Two pivotable tension members 6, 7 such as chain or cables connect the two side arms 11, 12 to the vessel 1. These tension members 6, 7 run from the ballasting members 13, 14 upwards through hawses 19 to fixing points 22 on deck 21 of the vessel 1. Any rolling movement of the vessel 1 is thus smoothed out by the up-and-down movement of the side arms 11, 12 causing the middle leg of the Y-shaped rigid arm to oscillate about its axis.
  • In addition, a mooring hawser 18 connects the single point mooring buoy 3 to a fixing point 24 on deck of the vessel 1. This is not essential but provides both an additional mooring facility and a factor of safety in the mooring arrangement.
  • The product fluid is carried to the single point mooring buoy 3 by means of the submarine riser 16. It is then transported to the vessel 1 by means of the floating hose string 17.

Claims (2)

1. Mooring system for mooring a vessel (1) on the surface of a body of water (2), comprising a mooring point (3) having buoyancy and being anchored to the floor of the body of water (2) and a rigid arm structure (15, 11, 12) connected at one end to said mooring point (3) and at the other end to the respective, ballasted, ends of two tension members (6, 7) one on each side of the vessel hull, characterized in that said mooring point (3) is a floating buoy (4) having a limited lateral stability and anehored by means of anehor chains or anchor cables, the tension members (6, 7) are pivotable tension members such as chains or cables and the rigid arm structure (15, 11, 12) is Y-shaped, each vessel end (13, 14) thereof being connected to a tension member (6, 7), the arrangement being such as to allow a rotational movement around the longitudinal axis of the Y-shaped structure.
2. Mooring system according to claim 1, characterised by an axial rotational connection (10) in the rigid arm (15).
EP81201274A 1981-11-17 1981-11-17 A single point mooring buoy with rigid arm Expired - Lifetime EP0079404B2 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
EP81201274A EP0079404B2 (en) 1981-11-17 1981-11-17 A single point mooring buoy with rigid arm
DE8181201274T DE3174847D1 (en) 1981-11-17 1981-11-17 A single point mooring buoy with rigid arm
OA57840A OA07247A (en) 1981-11-17 1982-11-05 Single point anchor structure.
DK507682A DK154335C (en) 1981-11-17 1982-11-15 DEVICE FOR MOVING A VESSEL
ES1982268488U ES268488Y (en) 1981-11-17 1982-11-15 SINGLE POINT MOORING STRUCTURE.
NO823830A NO154954C (en) 1981-11-17 1982-11-16 FORTOEYNINGSKONSTRUKSJON.
PH28146A PH21279A (en) 1981-11-17 1982-11-16 Single-point mooring structure
BR8206620A BR8206620A (en) 1981-11-17 1982-11-16 ATTRACTION STRUCTURE TO ATTACH A VESSEL ON THE SURFACE OF A WATER MASS
JP57201788A JPS5897585A (en) 1981-11-17 1982-11-17 Mooring arrangement
SG313/88A SG31388G (en) 1981-11-17 1988-05-21 A single point mooring buoy with rigid arm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81201274A EP0079404B2 (en) 1981-11-17 1981-11-17 A single point mooring buoy with rigid arm

Publications (3)

Publication Number Publication Date
EP0079404A1 EP0079404A1 (en) 1983-05-25
EP0079404B1 EP0079404B1 (en) 1986-06-18
EP0079404B2 true EP0079404B2 (en) 1992-03-25

Family

ID=8188163

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81201274A Expired - Lifetime EP0079404B2 (en) 1981-11-17 1981-11-17 A single point mooring buoy with rigid arm

Country Status (10)

Country Link
EP (1) EP0079404B2 (en)
JP (1) JPS5897585A (en)
BR (1) BR8206620A (en)
DE (1) DE3174847D1 (en)
DK (1) DK154335C (en)
ES (1) ES268488Y (en)
NO (1) NO154954C (en)
OA (1) OA07247A (en)
PH (1) PH21279A (en)
SG (1) SG31388G (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2547789B1 (en) * 1983-06-21 1988-06-24 Emh LOCKING SYSTEM FOR A BODY FLOATING LARGE DIMENSIONS ESPECIALLY AT SEA
FR2551721B2 (en) * 1983-09-14 1988-12-09 Emh LOCKING SYSTEM FOR A BODY FLOATING LARGE DIMENSIONS ESPECIALLY AT SEA
DE3344117C2 (en) * 1983-12-07 1985-10-31 Blohm + Voss Ag, 2000 Hamburg Permanent one-point anchoring of floating structures on the high seas
JPS61163083A (en) * 1985-01-14 1986-07-23 Mitsubishi Heavy Ind Ltd Single point mooring apparatus
GB2198407B (en) * 1986-06-19 1990-01-17 Peter William George Burridge Bearing assembly
NL191731C (en) * 1987-06-15 1996-05-03 Single Buoy Moorings Mooring system.
NL8800927A (en) * 1988-04-11 1989-11-01 Single Buoy Moorings MOORING SYSTEM WITH QUICK COUPLING.
EP1283159A1 (en) * 2001-08-06 2003-02-12 Single Buoy Moorings Inc. Hydrocarbon fluid transfer system
KR20080080194A (en) * 2005-12-22 2008-09-02 블루워터 에너지 서비시스 비.브이. Mooring system
US9803787B2 (en) 2012-09-14 2017-10-31 The United States Of America, As Represented By The Secretary Of The Navy Magnetically attracted fluid transfer system
CN110203331A (en) * 2019-06-14 2019-09-06 上海外高桥造船有限公司 A kind of hawser shoe for rigging hatch

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3155069A (en) * 1962-08-17 1964-11-03 B P Tanker Company Ltd Mooring arrangements for ships
US3556170A (en) * 1964-01-10 1971-01-19 Fmc Corp Mooring and fluid-transferring method
US3442245A (en) * 1968-04-08 1969-05-06 Us Army Rigid arm mooring means
FR2133307A5 (en) * 1971-04-16 1972-11-24 Elf Entr Rech Activit
US4176615A (en) * 1977-11-21 1979-12-04 Amtel, Inc. Mooring attachment for single point mooring terminals
IT1122786B (en) * 1979-08-17 1986-04-23 Magnanini Umberto TEMPORARY OR PERMANENT ROTATING MOORING STRUCTURE FOR SHIPS OR VESSELS

Also Published As

Publication number Publication date
ES268488U (en) 1983-05-16
JPS5897585A (en) 1983-06-10
ES268488Y (en) 1983-12-01
DK154335B (en) 1988-11-07
SG31388G (en) 1993-01-29
DK154335C (en) 1989-06-12
DE3174847D1 (en) 1986-07-24
NO154954B (en) 1986-10-13
NO154954C (en) 1987-01-21
BR8206620A (en) 1983-10-04
OA07247A (en) 1984-08-31
NO823830L (en) 1983-05-18
DK507682A (en) 1983-05-18
EP0079404A1 (en) 1983-05-25
EP0079404B1 (en) 1986-06-18
PH21279A (en) 1987-09-28

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