US20030103812A1 - Offshore load handling system - Google Patents

Offshore load handling system Download PDF

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Publication number
US20030103812A1
US20030103812A1 US10/267,799 US26779902A US2003103812A1 US 20030103812 A1 US20030103812 A1 US 20030103812A1 US 26779902 A US26779902 A US 26779902A US 2003103812 A1 US2003103812 A1 US 2003103812A1
Authority
US
United States
Prior art keywords
load
arm
handling system
floater
trolley
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.)
Abandoned
Application number
US10/267,799
Other languages
English (en)
Inventor
Hans Linden
Per Johansson
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.)
Master Marine AS
SKF AB
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to AKTIEBOLAGET SKF, MASTER MARINE A.S. reassignment AKTIEBOLAGET SKF ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LINDEN, HANS, JOHANSSON, PER
Publication of US20030103812A1 publication Critical patent/US20030103812A1/en
Abandoned 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 
    • B63B77/00—Transporting or installing offshore structures on site using buoyancy forces, e.g. using semi-submersible barges, ballasting the structure or transporting of oil-and-gas platforms

Definitions

  • the present invention relates to a system for handling offshore load transfer operations. More particular, the present invention relates to a system for handling offshore transfer operations using a floater device.
  • the present invention refers to a system for handling offshore load transfer operations, wherein a floater is taken to a transfer site at sea and loads are transferred between the floater and the transfer site.
  • the floater is equipped with a supporting structure carrying the load to be transferred.
  • the floater has adjustable buoyancy for offshore transport, installation and removal of structural elements.
  • Such a system is primarily intended for transport, installation and removal of heavy construction elements to or from offshore oil and gas platforms, and uses a floater with load transfer elements protruding from the floater.
  • the floater may have any form adapted to or suited for these tasks, and it may, for example, be of the type disclosed in U.S. Pat. No. 6,244,786, which illustrates and describes a column stabilized floater, or a catamaran-like floater, such as disclosed in U.S. Pat. No. 3,078,680.
  • Other suitable floaters are shown in European Patent Publication No. 000 462 A1, French Patent Application No. 247 992, Norwegian Patent Document No. 160424 and Norwegian Patent Document No. 135056.
  • the floater is deployed for transportation, installation, or removal of heavy construction elements, to or from fixed structures or floating structures offshore at open sea, hereinafter referred to as “marine structures”. Because the floater may be at open sea, the floater could be exposed to waves.
  • the heavy construction element is carried from underneath by beam elements, also referred to as load-transfer beams, which protrude from the floater.
  • the weight of the heavy construction elements is transferred from the floater to the marine structures by ballasting the floater, i.e., filling ballast into ballast tanks of the floater or discharge ballast from the tanks.
  • Horizontal dynamic loads from the floater can introduce large bending moments at the bottom of the substructure, which is fixed to the seabed. Large shear forces in the substructure as well as large horizontal forces at the contact point between the platform topside and the load carrying point on the load-transfer beams can also occur.
  • the present invention provides a floater which allows for horizontal motions relative to the marine structure, and especially wave frequency motions during the load-transfer operation.
  • the present invention provides an offshore load handling system, which will reduce the horizontal dynamic loads from the floater acting on the marine structure, and which will permit horizontal motions of the floater relative to the marine structure during the load-transfer operation in order to limit horizontal dynamic forces from the floater acting on the marine structure.
  • FIG. 1 shows schematically one type of a floater used in the load handling system according to the invention.
  • FIG. 2 shows schematically and in perspective an outer part of a load transfer beam forming part of the offshore load handling system according to the invention.
  • FIG. 3 is a schematic cross section of the load transfer beam shown in FIG. 2.
  • FIG. 1 shows a perspective view of a floater 20 , which in this embodiment has two hulls 21 , thereby being of the catamaran type.
  • the floater 20 supports a number of load transfer beams 1 , each one supported on a connecting structure 3 , which is attached to the floater 20 .
  • the connecting structures 3 project toward the opposite hull.
  • the load transfer beam 1 includes a hinged arm 2 connected to the structure 3 .
  • the structure 3 is preferably a box girder, which is firmly connected to the floater or forms an integrated part thereof.
  • the structure 3 has a forked bracket at its free end.
  • the forked bracket includes two lugs 4 , 5 arranged one above the other and substantially parallel to one another.
  • a journalled shaft 6 is arranged to extend substantially vertically between the two lugs 4 , 5 .
  • the hinged arm 2 is rotatable in the horizontal plane about the journalled shaft 6 .
  • the bending moment of the hinged arm 2 is taken up by two or more radial bearings 7 a , 7 b , and the vertical load is taken by one or more axial bearings 8 .
  • the radial bearings 7 a , 7 b could preferably be spherical roller bearings as illustrated and the axial bearing(s) 8 could preferably be a spherical roller thrust bearing.
  • the radial bearings 7 a , 7 b and the axial bearing(s) 8 preferably permit a certain amount of angular misalignment.
  • a trolley 9 supports a load carrying point 10 .
  • the trolley 9 is designed to move along the hinged arm 2 in a direction from the journalled shaft 6 towards the free end of the hinged arm 2 .
  • the trolley 9 is supported on linear bearings 11 (or other bearings with the same feature) on the hinged arm 2 .
  • the trolley 9 is designed to straddle the arm 2 , and the arm 2 is provided with a number of elongated ribs 12 spaced apart in a vertical direction and extending along the vertical sides of the arm 2 . These ribs 12 are arranged to cooperate with corresponding ribs or ledgers inside the vertical sidewalls of the trolley 9 .
  • the ribs 12 in the arm 2 and the ledgers inside the trolley act as supporting structures for the linear bearings 11 .
  • the load carrying point 10 could preferably be a steel plate, supported by a spherical roller thrust bearing 13 or other bearing allowing for rotation about the z-axis and tilt about the x- and y-axes.
  • the spherical roller thrust bearing 13 (or other bearing with the same feature) could preferably be supported by a hydraulic jack 14 , in order to adjust height of the load carrying points 10 and to control loads on each lifting point 10 when more than one lifting point 10 are working in multiple.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Jib Cranes (AREA)
  • Load-Engaging Elements For Cranes (AREA)
US10/267,799 2001-10-10 2002-10-10 Offshore load handling system Abandoned US20030103812A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0103406-5 2001-10-10
SE0103406A SE0103406L (sv) 2001-10-10 2001-10-10 Lasthanteringssystem för offshorebruk

Publications (1)

Publication Number Publication Date
US20030103812A1 true US20030103812A1 (en) 2003-06-05

Family

ID=20285633

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/267,799 Abandoned US20030103812A1 (en) 2001-10-10 2002-10-10 Offshore load handling system

Country Status (4)

Country Link
US (1) US20030103812A1 (nl)
NL (1) NL1021626C2 (nl)
NO (1) NO20024886L (nl)
SE (1) SE0103406L (nl)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105539722A (zh) * 2015-10-12 2016-05-04 武汉船舶职业技术学院动力工程学院 一种船舶主机和轴系安装技能的测评方法
WO2019069076A1 (en) * 2017-10-06 2019-04-11 Offshore Decommissioning Services Ltd SEMI-SUBMERSIBLE SHIP
EP3508412A1 (en) * 2018-01-04 2019-07-10 Robert Bosch GmbH Topside lifting device, topside lifting arrangement, vessel comprising the topside lifting arrangement, and method of lifting or lowering a topside
US20190263483A1 (en) * 2016-11-17 2019-08-29 Cccc First Harbor Engineering Co., Ltd. Self-propelled integrated ship for transporting and installing immersed tubes of underwater tunnel and construction process
US11674283B2 (en) * 2021-04-23 2023-06-13 Cccc First Harbor Engineering Co., Ltd. Semi-submersible immersed tube transportation and installation integrated ship and construction process

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4829924A (en) * 1986-07-21 1989-05-16 Dynovation Design And Engineering Inc. Semi submersible device and method to set and salvage marine superstructures
US4973200A (en) * 1987-01-14 1990-11-27 Allseas Engineering B.V. Method for manoeuvering a superstructure element relative to a fixed construction arranged in water, method for constructing a building structure and building structure constructed according to such a method
US5829919A (en) * 1995-11-03 1998-11-03 Allseas Group S. A. Method and installation for removing a superstructure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4829924A (en) * 1986-07-21 1989-05-16 Dynovation Design And Engineering Inc. Semi submersible device and method to set and salvage marine superstructures
US4973200A (en) * 1987-01-14 1990-11-27 Allseas Engineering B.V. Method for manoeuvering a superstructure element relative to a fixed construction arranged in water, method for constructing a building structure and building structure constructed according to such a method
US5829919A (en) * 1995-11-03 1998-11-03 Allseas Group S. A. Method and installation for removing a superstructure

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105539722A (zh) * 2015-10-12 2016-05-04 武汉船舶职业技术学院动力工程学院 一种船舶主机和轴系安装技能的测评方法
US20190263483A1 (en) * 2016-11-17 2019-08-29 Cccc First Harbor Engineering Co., Ltd. Self-propelled integrated ship for transporting and installing immersed tubes of underwater tunnel and construction process
US10836459B2 (en) * 2016-11-17 2020-11-17 Cccc First Harbor Engineering Co., Ltd. Self-propelled integrated ship for transporting and installing immersed tubes of underwater tunnel and construction process
WO2019069076A1 (en) * 2017-10-06 2019-04-11 Offshore Decommissioning Services Ltd SEMI-SUBMERSIBLE SHIP
EP3508412A1 (en) * 2018-01-04 2019-07-10 Robert Bosch GmbH Topside lifting device, topside lifting arrangement, vessel comprising the topside lifting arrangement, and method of lifting or lowering a topside
US11674283B2 (en) * 2021-04-23 2023-06-13 Cccc First Harbor Engineering Co., Ltd. Semi-submersible immersed tube transportation and installation integrated ship and construction process

Also Published As

Publication number Publication date
NL1021626A1 (nl) 2003-04-11
SE0103406D0 (sv) 2001-10-10
SE0103406L (sv) 2003-04-11
NL1021626C2 (nl) 2003-09-18
NO20024886L (no) 2003-04-11
NO20024886D0 (no) 2002-10-10

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Legal Events

Date Code Title Description
AS Assignment

Owner name: MASTER MARINE A.S., NORWAY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LINDEN, HANS;JOHANSSON, PER;REEL/FRAME:013723/0636;SIGNING DATES FROM 20030130 TO 20030203

Owner name: AKTIEBOLAGET SKF, SWEDEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LINDEN, HANS;JOHANSSON, PER;REEL/FRAME:013723/0636;SIGNING DATES FROM 20030130 TO 20030203

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION