EP2888193A1 - Method for lowering and hoisting of a load to or from an ocean floor - Google Patents

Method for lowering and hoisting of a load to or from an ocean floor

Info

Publication number
EP2888193A1
EP2888193A1 EP13831312.7A EP13831312A EP2888193A1 EP 2888193 A1 EP2888193 A1 EP 2888193A1 EP 13831312 A EP13831312 A EP 13831312A EP 2888193 A1 EP2888193 A1 EP 2888193A1
Authority
EP
European Patent Office
Prior art keywords
load
winch
weight
fraction
positioning
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.)
Withdrawn
Application number
EP13831312.7A
Other languages
German (de)
French (fr)
Other versions
EP2888193A4 (en
Inventor
Ottar Antonsen
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.)
Rolls Royce Marine AS
Original Assignee
Rolls Royce Marine AS
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 to NO20120936A priority Critical patent/NO20120936A1/en
Application filed by Rolls Royce Marine AS filed Critical Rolls Royce Marine AS
Priority to PCT/NO2013/000040 priority patent/WO2014031004A1/en
Publication of EP2888193A1 publication Critical patent/EP2888193A1/en
Publication of EP2888193A4 publication Critical patent/EP2888193A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/36Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
    • B66C23/52Floating cranes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/08Arrangement of ship-based loading or unloading equipment for cargo or passengers of winches
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/10Arrangement of ship-based loading or unloading equipment for cargo or passengers of cranes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B3/00Hulls characterised by their structure or component parts
    • B63B3/14Hull parts
    • B63B2003/147Moon-pools, e.g. for offshore drilling vessels

Abstract

A method is described for the lowering of a load (18) to the ocean floor from a vessel (10) that floats on the ocean surface, comprising the features: to couple a first lifting line (20) from a load holding winch (12) to the load (18), to connect a second lifting line (22) from a positioning winch (14a) to the load (18) and to adjust the positioning winch (14a) so that a fraction of the weight of the load (18) is taken up, to set the load holding winch (12) in a constant tension mode and to adjust the load holding winch (12) so that a fraction of the weight of the load is compensated, where the fraction of the weight that the load holding winch (12) takes up is greater than the fraction of the weight which the positioning winch (14a) takes up, and during lowering of the load (18), the positioning winch (14a) lets out the second lifting line (22) for lowering of the load (18), while the load holding winch (12) follows behind with letting out the first lifting line (20). A method for hoisting of the load is also described.

Description

Method for lowering and hoisting of a load to or from an ocean floor.
The present invention relates to methods for lowering and hoisting, respectively, of a load to or from the ocean floor from a vessel that floats on the ocean surface, where a first lifting line from a load holding winch is coupled to the load and a second lifting line from a positioning winch is coupled to the load.
This description has as an aim to describe an invention relating to a concept for installation and lifting that comprises equipment for anchor handling operations, and also a crane or positioning winch for subsea operations.
The system is initially described installed on an anchor handling vessel, but can also be adapted to other vessels, such as barges, cargo ships, etc. The core of the
invention is that one gets a possibility to handle a load, with a crane or the like, that is much bigger than the lifting capacity of the crane by using, for example, an anchor handling winch (load holding winch) in a constant tension mode, while the crane can operate in an active heave mode.
From prior art, reference is made to US 20120156003 Al . From the US document one can see, in a sense, the use of a heave compensated crane that can cooperate with a winch. However, it is very clear that both shall take up an even load, and there is no mention that the weight of the load shall be adjusted differently between the crane and the winch. Furthermore, a special loading block is apparent, as is the connection with the use of an ROV. In contrast to said US document, it is an essential feature of the invention that the winch shall take up the largest part of the weight and the crane is used to position and lower the load. During lowering, the winch is preferably in a constant tension mode. During hoisting, both the crane and the winch are preferably in a constant tension mode.
The object of the invention comprises use of one of the drums belonging to the anchor handling winch as a load holding winch, while the subsea crane/positioning winch positions the load.
This is achieved in that the load hangs in the load holding winch either across a stern roller or through an overboard disc arrangement at other places on the vessel, for example, through a moon pool. The crane/positioning winch can be coupled to the main line with the help of, for example, a triangle plate.
According to the invention a method is provided for the lowering of a load to the ocean floor from a vessel that floats on the ocean surface, comprising the features:
- to couple a first lifting line to the load from a load holding winch,
- to couple a second lifting line to the load from a positioning winch and to adjust the positioning winch so that a fraction of the weight of the load is taken up,
- to set the load holding winch in a constant tension mode and to adjust the load holding winch so that a fraction of the weight of the load is compensated, where the weight fraction that the load holding winch takes up is greater than the weight fraction that the positioning winch takes up, and
- during the lowering of the load the positioning winch lets out the second lifting line for the lowering of the load, while the load holding winch follows behind by releasing the first lifting line.
According to the invention a method is also provided for the hoisting of a load from the ocean floor by a vessel that floats on the ocean surface, comprising the features:
- to couple a first lifting line to the load from a load holding winch,
- to couple a second lifting line to the load from a positioning winch,
- to set the positioning winch in a constant tension mode and to adjust the positioning winch so that a
fraction of the weight of the load is taken up,
- to set the load holding winch in a constant tension mode and also to adjust the load holding winch so that a fraction of the weight of the load is compensated, where the weight fraction that the load holding winch takes up is greater than the weight fraction which the positioning winch takes up, and
- during the hoisting of the load the load holding winch lifts the load in a constant tension mode and the positioning winch lifts the load in a constant tension mode .
Alternative embodiments are given in the dependent claims.
During the lowering and hoisting, the fraction of the weight that the load holding winch takes up can be more than 80% of the weight of the load and the fraction of the weight that the positioning winch takes up can be less than 20% of the weight of the load.
During both lowering and hoisting, the fraction of the weight that the load holding winch takes up can be
approximately 90% of the weight of the load and the fraction of the weight that the positioning winch takes up can be approximately 10% of the weight of the load.
The positioning winch is preferably mounted to a deck crane on the vessel.
During the placing of the load on the ocean floor the deck crane can be set in an active heave compensation mode.
During the connection of the second lifting line to the load on the ocean floor the deck crane can be set in an active heave compensation mode.
The invention shall now be described in more detail with the help of the enclosed figure 1, which shows a diagram of a vessel equipped with a crane and a winch.
The figure shows a vessel 10, such as an anchor handling vessel which is equipped with a load handling winch 12, such as an anchor handling winch. The vessel 10 is further equipped with a deck crane 14 fitted with a heave
compensation, and whereupon, or whereto, a positioning winch is mounted, indicated by the reference number 14a, such as a winch for subsea operations.
In one embodiment the heave compensated crane 14 can, for example, comprise a lower vertical boom and an upper horizontal boom that are mutually connected via an articulated piece, and where the vertical boom is
connected at the bottom to a base socket which in turn encompasses a slew ring for rotation of the crane about a vertical axis. A tension stay can be arranged between the base socket and the articulated piece at a distance from the vertical boom and on the whole in parallel with this, in a normal position for the crane. The vertical boom can be driven by at least one cylinder and the movement of the upper crane boom with respect to the lower boom can be driven by an intermediate-lying cylinder arrangement, where the cylinder arrangement can comprise at least one single acting cylinder and at least one double acting cylinder. Other cranes that can be heave compensated can, of course, be used.
During the hoisting and the lowering of a load 18 the load can be connected to first and second lifting lines 20,22, where the lifting lines can run, for example, over the stern roller of the vessel, indicated by the reference number 26, or through the ship's moon pool 16. In the latter case, the lifting line 20 can then run over one or more pulleys 28 or the like mounted on the deck, or in the moon pool . The first lifting line 20 runs from the load handling winch 12 and to the load 18 and the second lifting line 22 runs from the positioning winch 14a. The first and the second lifting line can be connected to the load 18 with the help of, for example, a triangle plate 24 or the like.
When the crane/positioning winch is connected, it can lift with about 10% of the weight of the object. Thereafter the load holding winch is set in a constant tension mode and adjusted so that about 90% of the weight is compensated. The crane/positioning winch can now be used to guide the load down to the ocean floor, while the load holding winch follows. On placing the load on the ocean floor the crane/positioning winch can be set in an active heave compensation mode and the load can be put down without being influenced by the movements of the ship.
At the lifting of objects from the ocean floor, the crane/positioning winch is used to hold the lifting appliance at the connection, and if necessary in an active heave compensation mode. After the connection the crane can be set in a constant tension mode, and the load holding winch can lift the load in a constant tension mode free from the ocean floor.

Claims

C L A I M S
1. Method for lowering of a load (18) to the ocean floor from a vessel (10) that floats on the ocean surface, comprising the features:
- to couple a first lifting line (20) from a load holding winch (12) to the load (18)
- to connect a second lifting line (22) from a positioning winch (14a) to the load (18),
c h a r a c t e r i s e d b y
- to adjust the positioning winch (14a) so that a fraction of the weight of the load (18) is taken up,
- to set the load holding winch (12) in a constant tension mode and to adjust the load holding winch (12) so that a fraction of the weight of the load is compensated, where the fraction of the weight that the load holding winch (12) takes up is greater than the fraction of the weight which the positioning winch (14a) takes up, and
- during lowering of the load (18), the positioning winch (14a) lets out the second lifting line (22) for lowering of the load (18), while the load holding winch (12) follows behind with letting out the first lifting line (20) .
2. Method according to claim 1,
c h a r a c t e r i s e d i n that the fraction of the weight that the load holding winch (12) takes up is more than 80% of the weight of the load and that the fraction of the weight that the positioning winch (14a) takes up is less than 20% of the weight of the load.
3. Method according to claim 1,
c h a r a c t e r i s e d i n that the fraction of the weight that the load holding winch (12) takes up is approximately 90% of the weight of the load and that the fraction of the weight that the positioning winch (14a) takes up is approximately 10% of the weight of the load.
4. Method according to claim 1,
c h a r a c t e r i s e d i n that the positioning winch (14a) is mounted to a deck crane (14) on the vessel.
5. Method according to claim 4,
c h a r a c t e r i s e d in that during the landing of the load (18) on the ocean floor the deck crane (14) is set in an active heave compensation mode.
6. Method for the hoisting of a load (18) from the ocean floor from a vessel (10) that floats on the ocean surface, comprising the features:
- to couple a first lifting line (20) from a load holding winch (12) to the load (18),
- to connect a second lifting line (22) from a positioning winch (14a) to the load (18),
c h a r a c t e r i s e d b y
- to set the positioning winch (14a) in a constant tension mode and to adjust the positioning winch (14a) so that a fraction of the weight of the load (18) is taken up,
- to set the load holding winch (12) in a constant tension mode and also to adjust the load holding winch
(12) so that a fraction of the weight of the load is compensated, where the fraction of the weight that the load holding winch (12) takes up is greater than the fraction of the weight that the positioning winch (14a) takes up, and
- during hoisting of the load (18) the load
holding winch (12) lifts the load (18) in a constant tension mode and the positioning winch (14a) lifts the load (18) in a constant tension mode.
7. Method according to claim 6,
c h a r a c t e r i s e d in that the fraction of the weight that is taken up by the load holding winch (12) is more than 80% of the weight of the load and that the fraction of the weight that the positioning winch (14a) takes up is less than 20% of the weight of the load.
8. Method according to claim 6,
c h a r a c t e r i s e d in that the fraction of the weight that the load holding winch (12) takes up is approximately 90% of the weight of the load and that the fraction of the weight that the positioning winch (14a) takes up is approximately 10% of the weight of the load.
9. Method according to claim 6,
c h a r a c t e r i s e d in that the positioning winch (14a) is mounted to a deck crane (14) on the vessel.
10. Method according to claim 9,
c h a r a c t e r i s e d in that during connection of the second lifting line (22) to the load (18) on the ocean floor, the deck crane (14) is set in an active heave compensation mode.
EP13831312.7A 2012-08-22 2013-07-25 Method for lowering and hoisting of a load to or from an ocean floor Withdrawn EP2888193A4 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NO20120936A NO20120936A1 (en) 2012-08-22 2012-08-22 Procedure for lowering and raising cargo to or from the seabed
PCT/NO2013/000040 WO2014031004A1 (en) 2012-08-22 2013-07-25 Method for lowering and hoisting of a load to or from an ocean floor

Publications (2)

Publication Number Publication Date
EP2888193A1 true EP2888193A1 (en) 2015-07-01
EP2888193A4 EP2888193A4 (en) 2016-05-11

Family

ID=50150199

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13831312.7A Withdrawn EP2888193A4 (en) 2012-08-22 2013-07-25 Method for lowering and hoisting of a load to or from an ocean floor

Country Status (7)

Country Link
US (1) US20150217838A1 (en)
EP (1) EP2888193A4 (en)
CN (1) CN104540767A (en)
BR (1) BR112015003639A2 (en)
NO (1) NO20120936A1 (en)
SG (1) SG11201501217VA (en)
WO (1) WO2014031004A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2012527B1 (en) * 2014-03-28 2016-02-10 Bluemarine Offshore Yard Service Bv Method for lowering a subsea structure having a substantially flat support base into the water through the splash zone.
US9957142B2 (en) * 2014-08-29 2018-05-01 Teledyne Instruments, Inc. Shipboard winch with computer-controlled motor
CN104692247B (en) * 2014-12-09 2017-02-01 中国海洋石油总公司 Twisting-resisting installation method of deepwater underwater structure
EP3045416A1 (en) * 2015-01-14 2016-07-20 Robert Bosch Gmbh Device for lifting, lowering or holding a load and method of controlling such a device
EP3254946B1 (en) * 2016-06-07 2020-05-27 Jan De Nul N.V. Workboat for anchor handling

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US3807334A (en) * 1973-09-17 1974-04-30 Us Navy Motion compensating device for surface supported underwater structures
US4157812A (en) * 1977-08-15 1979-06-12 Bunker Ramo Corporation Ship motion compensator for recovery of oceanographic instrumentation
DD202676A1 (en) * 1981-07-09 1983-09-28 Toppe Hans Ernst Seaging subsystem for ship cranes
US5507596A (en) * 1993-10-15 1996-04-16 The United States Of America As Represented By The Secretary Of Commerce Underwater work platform support system
NL1009277C2 (en) * 1998-05-28 1999-11-30 Francois Bernard Method and device for accurately placing relatively heavy objects on and removing heavy objects from the seabed.
US6926103B1 (en) * 2001-07-02 2005-08-09 Itrec B.V. Splittable block on a derrick
US6826452B1 (en) * 2002-03-29 2004-11-30 The Penn State Research Foundation Cable array robot for material handling
GB0406336D0 (en) * 2004-03-19 2004-04-21 Subsea 7 Uk Apparatus and method
GB2434627B (en) * 2006-01-31 2010-10-20 Subsea 7 Ltd Apparatus and method for laying down, abandoning and recovering a pipe on the sea floor
NO330923B1 (en) * 2007-07-05 2011-08-15 Nat Oilwell Norway As Procedure for hoisting a package at sea
BRPI0800140A2 (en) * 2008-02-01 2009-10-20 Zytech Industrial Ltda process for lowering equipment to the bottom of the sea
GB0819400D0 (en) * 2008-10-22 2008-11-26 Subsea 7 Offshore lifting operations
DE102008059805A1 (en) * 2008-12-01 2010-06-02 Liebherr-Werk Nenzing Gmbh Device for lifting and lowering of load in water, has lifting unit with hoist rope and storage drum with another hoist rope, which are particularly arranged on floating unit
GB2466983B (en) * 2009-01-16 2013-10-30 Subsea 7 Ltd A method and apparatus for supporting a load
NO333202B1 (en) * 2009-02-16 2013-04-08 Nat Oilwell Varco Norway As Method and device for hoisting a package from a crane
KR101027583B1 (en) * 2010-07-08 2011-04-06 (주)해안기계산업 Active heave compensation system

Also Published As

Publication number Publication date
CN104540767A (en) 2015-04-22
EP2888193A4 (en) 2016-05-11
SG11201501217VA (en) 2015-04-29
WO2014031004A1 (en) 2014-02-27
NO20120936A1 (en) 2014-02-24
BR112015003639A2 (en) 2018-04-17
US20150217838A1 (en) 2015-08-06

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