WO2006126884A1 - A method and a device for attaching a subsea cutting apparatus - Google Patents

A method and a device for attaching a subsea cutting apparatus Download PDF

Info

Publication number
WO2006126884A1
WO2006126884A1 PCT/NO2005/000107 NO2005000107W WO2006126884A1 WO 2006126884 A1 WO2006126884 A1 WO 2006126884A1 NO 2005000107 W NO2005000107 W NO 2005000107W WO 2006126884 A1 WO2006126884 A1 WO 2006126884A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting
cutting apparatus
seabed
accordance
attachment
Prior art date
Application number
PCT/NO2005/000107
Other languages
French (fr)
Inventor
Knut Bang
Original Assignee
Norse Cutting & Abandonment 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
Application filed by Norse Cutting & Abandonment As filed Critical Norse Cutting & Abandonment As
Priority to PCT/NO2005/000107 priority Critical patent/WO2006126884A1/en
Priority to GB0717633A priority patent/GB2438349B/en
Priority to US11/910,254 priority patent/US20080304915A1/en
Publication of WO2006126884A1 publication Critical patent/WO2006126884A1/en
Priority to NO20074519A priority patent/NO20074519L/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D53/00—Machines or devices for sawing with strap saw-blades which are effectively endless in use, e.g. for contour cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D57/00—Sawing machines or sawing devices not covered by one of the preceding groups B23D45/00 - B23D55/00
    • B23D57/0084—Sawing machines or sawing devices not covered by one of the preceding groups B23D45/00 - B23D55/00 specially adapted for sawing under water or at places accessible with difficulty
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/24—Anchors
    • B63B21/26—Anchors securing to bed
    • B63B21/27—Anchors securing to bed by suction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/52—Tools specially adapted for working underwater, not otherwise provided for
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
    • E02D9/04—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof by cutting-off under water

Definitions

  • This invention regards a method of attaching a subsea cutting apparatus. More particularly, it regards a method in which a cutting apparatus designed to cut an object is attached to the seabed.
  • the invention also comprises a device for implementing the method.
  • Cutting of objects located under water can according to prior art be accomplished by e.g. sawing, grinding, clipping or burning .
  • the cutting operation is normally performed by placing a cutting apparatus at the cutting site by means of e.g. lifting equipment or a so-called ROV (Remote Operated Vehicle) . Then the cutting apparatus may optionally be connected to the object to be cut. It has proven to be rather difficult to achieve satisfactory attachment of a cutting apparatus by remote control, when using prior art. For reasons of safety, the actual cutting operation is normally controlled from a location remote from the cutting site, preferably from the surface of the sea.
  • ROV Remote Operated Vehicle
  • the object of the invention is to remedy or reduce at least one of the disadvantages of prior art.
  • a framework structure is placed on or immediately above the seabed by the object to be cut.
  • the framework structure is provided with a cutting head arranged to be displaced (advanced) in the direction of the object to be cut, in a manner that is known per se.
  • the cutting head may, in dependence of the cutting method em- ployed, comprise e.g. cutting tools that represent prior art per se, such as a diamond wire saw, a saw blade saw, a grinding rig in which is used an abrasive wheel or a fluid to which has been added an abrasive.
  • the cutting head may comprise torch equipment based on gas or electric- ity. It may also be appropriate to combine various cutting equipment .
  • the framework structure is provided with at least one fastener portion arranged to be coupled to an attachment projecting into the seabed.
  • the attachment is brought to the seabed along with the cutting apparatus.
  • the attachment or attachments can be moved into the seabed.
  • the attachments are made to accommodate the forces transferred from the cutting head to the framework structure.
  • the attachment may be pre-mounted at the mounting site and may in addition to the attachment also comprise a coupling portion for coupling to the framework structure.
  • the attachment is designed as a suction anchor or a ground screw.
  • other solutions such as a pile or hooks may be appropriate.
  • Figure 1 is a plan view of a cutting apparatus placed in po- sition about an object to be cut;
  • Figure 2 is a side view la-la of figure 1;
  • Figure 3 is a side view Ib-Ib of figure 1;
  • Figure 4 shows the same as figure 1, but here the object has been partially cut
  • Figure 5 shows a cutting apparatus equipped with ground screws ;
  • Figure 6 shows a cutting apparatus equipped with piles.
  • reference number 1 denotes a cutting appara- tus comprising a framework structure 2 and a cutting head 4 displaceably coupled to the framework structure.
  • the framework structure 2 comprises two parallel spaced-apart frame members 6.
  • the frame members 6 are assembled by means of a cross member 8 extending between the frame members 6 near one end of the frame members 6.
  • the cross member 8 and the frame members 6 together form an open U-shape .
  • the framework structure 2 can be moved in across an object 10 to be cut, so that the object 10 will be between the frame members 6, see figure 1.
  • the frame members 6 each have a rail 12, which rails are mutually parallel.
  • the rails 12 are a complementary fit to drive and running wheels (not shown) provided in the wheel- houses 16 of the cutting head 4.
  • the wheelhouses 16 are rigidly interconnected by a profile 18.
  • the wheelhouses 16 also form the supports for the driving disk 20 and reversing disk 22, respectively, of the cutting head.
  • the driving disk 20 is connected to a driving motor 24.
  • a sawing wire 26 preferably provided with diamond cutting means runs endlessly around the disks 20, 22.
  • the outside of the framework structure 2 has a number of fastener portions 28, here three, for coupling to respective attachments 30.
  • attachments 30 are suction anchors 32.
  • the required control and power connections to the cutting apparatus 1 are of a type that is known per se, and are not shown.
  • the cutting apparatus 1 When an object 10 is to be cut the cutting apparatus 1 is placed on the seabed about the object 10.
  • the suction anchors 30 are moved into the seabed 34 in a manner that is known per se, by removing the water present inside the suction anchor 30. This results in a negative pressure in the suction anchor 30, causing the suction anchor 30 to move into the seabed 34.
  • the driving motor 24 is started, thus causing the sawing wire 26 to rotate about the disks 20, 22. Then the cutting head 4 is advanced towards the object 10, whereby the sawing wire 26 cuts into the body of the object 10, see figure 4.
  • the sawed-off part of the object 10 may be removed, whereupon the cutting apparatus 1 can be released from the seabed 34.
  • the cutting apparatus 1 is provided with ground screws 36.
  • the ground screws are designed with a screw thread 38 and are arranged to be screwed into the seabed 34 by turning the ground screw 36 about its own longitudinal axis.
  • the ground screw 36 extends rotatably through a through opening 40 in the fastener part 28.
  • the cutting apparatus 1 is provided with piles 42 extending through respective openings 40 and into the seabed 34, see figure 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
  • Underground Or Underwater Handling Of Building Materials (AREA)

Abstract

A method of and a device for attaching a cutting apparatus (1), the cutting apparatus (1) comprising a framework struc­ture (2) and a cutting head (4) which can be displaced rela­tive to the framework structure (2), and where, during the cutting operation, the cutting apparatus (1) is tied in to the seabed (34) by means of at least one attachment (30).

Description

A METHOD AND DEVICE FOR ATTACHING A SUBSEA CUTTING APPARATUS
This invention regards a method of attaching a subsea cutting apparatus. More particularly, it regards a method in which a cutting apparatus designed to cut an object is attached to the seabed. The invention also comprises a device for implementing the method.
Cutting of objects located under water can according to prior art be accomplished by e.g. sawing, grinding, clipping or burning .
The cutting operation is normally performed by placing a cutting apparatus at the cutting site by means of e.g. lifting equipment or a so-called ROV (Remote Operated Vehicle) . Then the cutting apparatus may optionally be connected to the object to be cut. It has proven to be rather difficult to achieve satisfactory attachment of a cutting apparatus by remote control, when using prior art. For reasons of safety, the actual cutting operation is normally controlled from a location remote from the cutting site, preferably from the surface of the sea.
It is also known to place a cutting apparatus on the seabed during cutting operations. This may prove satisfactory when clipping an object, but as a rule it will not provide sufficient stability when cutting the object by means of sawing or grinding.
The object of the invention is to remedy or reduce at least one of the disadvantages of prior art.
The object is achieved in accordance with the invention, by the characteristics stated in the description below and in the following claims.
A framework structure is placed on or immediately above the seabed by the object to be cut. The framework structure is provided with a cutting head arranged to be displaced (advanced) in the direction of the object to be cut, in a manner that is known per se.
The cutting head may, in dependence of the cutting method em- ployed, comprise e.g. cutting tools that represent prior art per se, such as a diamond wire saw, a saw blade saw, a grinding rig in which is used an abrasive wheel or a fluid to which has been added an abrasive. Alternatively the cutting head may comprise torch equipment based on gas or electric- ity. It may also be appropriate to combine various cutting equipment . The framework structure is provided with at least one fastener portion arranged to be coupled to an attachment projecting into the seabed.
Most preferably the attachment is brought to the seabed along with the cutting apparatus. When the cutting apparatus is in a planned position the attachment or attachments can be moved into the seabed. When attached to the seabed, the attachments are made to accommodate the forces transferred from the cutting head to the framework structure.
The attachment may be pre-mounted at the mounting site and may in addition to the attachment also comprise a coupling portion for coupling to the framework structure.
Advantageously the attachment is designed as a suction anchor or a ground screw. In special cases other solutions such as a pile or hooks may be appropriate.
The following describes a non-limiting example of a preferred method and embodiment illustrated in the accompanying drawings, in which:
Figure 1 is a plan view of a cutting apparatus placed in po- sition about an object to be cut;
Figure 2 is a side view la-la of figure 1;
Figure 3 is a side view Ib-Ib of figure 1;
Figure 4 shows the same as figure 1, but here the object has been partially cut; Figure 5 shows a cutting apparatus equipped with ground screws ; and
Figure 6 shows a cutting apparatus equipped with piles.
In the drawings, reference number 1 denotes a cutting appara- tus comprising a framework structure 2 and a cutting head 4 displaceably coupled to the framework structure.
The framework structure 2 comprises two parallel spaced-apart frame members 6. The frame members 6 are assembled by means of a cross member 8 extending between the frame members 6 near one end of the frame members 6. The cross member 8 and the frame members 6 together form an open U-shape . Thus the framework structure 2 can be moved in across an object 10 to be cut, so that the object 10 will be between the frame members 6, see figure 1.
The frame members 6 each have a rail 12, which rails are mutually parallel. The rails 12 are a complementary fit to drive and running wheels (not shown) provided in the wheel- houses 16 of the cutting head 4.
The wheelhouses 16 are rigidly interconnected by a profile 18. The wheelhouses 16 also form the supports for the driving disk 20 and reversing disk 22, respectively, of the cutting head.
The driving disk 20 is connected to a driving motor 24. A sawing wire 26 preferably provided with diamond cutting means runs endlessly around the disks 20, 22. The outside of the framework structure 2 has a number of fastener portions 28, here three, for coupling to respective attachments 30.
In this preferred embodiment the attachments 30 are suction anchors 32.
The required control and power connections to the cutting apparatus 1 are of a type that is known per se, and are not shown.
When an object 10 is to be cut the cutting apparatus 1 is placed on the seabed about the object 10. The suction anchors 30 are moved into the seabed 34 in a manner that is known per se, by removing the water present inside the suction anchor 30. This results in a negative pressure in the suction anchor 30, causing the suction anchor 30 to move into the seabed 34.
After the cutting apparatus 1 has been tied in to the seabed the driving motor 24 is started, thus causing the sawing wire 26 to rotate about the disks 20, 22. Then the cutting head 4 is advanced towards the object 10, whereby the sawing wire 26 cuts into the body of the object 10, see figure 4.
When the cutting has been completed the sawed-off part of the object 10 may be removed, whereupon the cutting apparatus 1 can be released from the seabed 34.
In an alternative embodiment, see figure 5, the cutting apparatus 1 is provided with ground screws 36. The ground screws are designed with a screw thread 38 and are arranged to be screwed into the seabed 34 by turning the ground screw 36 about its own longitudinal axis. The ground screw 36 extends rotatably through a through opening 40 in the fastener part 28.
In another embodiment the cutting apparatus 1 is provided with piles 42 extending through respective openings 40 and into the seabed 34, see figure 6.

Claims

C l a i m s
1. A method of attaching a cutting apparatus (1), the cutting apparatus (1) comprising a framework structure (2) enclosing the object to be cut and a cutting head (4) which can be displaced relative to the framework structure (2), c h a r a c t e r i z e d i n that during the cutting operation, the cutting apparatus (1) is tied in to the seabed (34) by means of at least one attachment (30).
2. A method in accordance with Claim 1, c h a r a c t e r i z e d i n that the cutting apparatus (1) is tied in to the seabed (34) by means of at least one suction anchor (32).
3. A method in accordance with Claim 1, c h a r a c - t e r i z e d i n that that the cutting apparatus (1) is tied in to the seabed (34) by means of at least one ground screw (36) .
4. A method in accordance with Claim 1, c h a r a c t e r i z e d i n that that the cutting appara- tus (1) is tied in to the seabed (34) by means of at least one pile (42).
5. A device for attaching a cutting apparatus (1), the cutting apparatus (1) comprising a framework structure (2) enclosing the object to be cut and a cutting head (4) which can be displaced relative to the framework structure (2), c h a r a c t e r i z e d i n that during the cutting operation, the cutting appara- tus (1) is tied in to the seabed (34) by means of at least one attachment (30) that projects into the seabed (34) .
6. A device in accordance with Claim 5, c h a r a c - t e r i z e d i n that that the attachment (30) comprises a suction anchor (32) .
7. A device in accordance with Claim 5, c h a r a c t e r i z e d i n that that the attachment (30) comprises a ground screw (36) .
8. A device in accordance with Claim 5, c h a r a c t e r i z e d i n that that the attachment (30) comprises a pile (42) .
9. A device in accordance with one or more of Claims 5 to 8, c h a r a c t e r i z e d i n that the cutting apparatus (1) is provided with a sawing wire (26) comprising diamond cutting means.
10. A device in accordance with one or more of Claims 5 to 8, c h a r a c t e r i z e d i n that the cutting apparatus (1) is provided with means of util- izing a cutting medium in the form of a fluid to which has been added an abrasive.
PCT/NO2005/000107 2005-03-29 2005-03-29 A method and a device for attaching a subsea cutting apparatus WO2006126884A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PCT/NO2005/000107 WO2006126884A1 (en) 2005-03-29 2005-03-29 A method and a device for attaching a subsea cutting apparatus
GB0717633A GB2438349B (en) 2005-03-29 2005-03-29 A method and a device for attaching a subsea cutting apparatus
US11/910,254 US20080304915A1 (en) 2005-03-29 2005-03-29 Method and Device For Attaching a Subsea Cutting Apparatus
NO20074519A NO20074519L (en) 2005-03-29 2007-09-07 Method and apparatus for attaching an underwater cutter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/NO2005/000107 WO2006126884A1 (en) 2005-03-29 2005-03-29 A method and a device for attaching a subsea cutting apparatus

Publications (1)

Publication Number Publication Date
WO2006126884A1 true WO2006126884A1 (en) 2006-11-30

Family

ID=37452239

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2005/000107 WO2006126884A1 (en) 2005-03-29 2005-03-29 A method and a device for attaching a subsea cutting apparatus

Country Status (4)

Country Link
US (1) US20080304915A1 (en)
GB (1) GB2438349B (en)
NO (1) NO20074519L (en)
WO (1) WO2006126884A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2216117A1 (en) * 2009-02-10 2010-08-11 Betag-Betontaglio SA Rope saw and method for operating same
WO2011108939A1 (en) * 2010-03-05 2011-09-09 Mechanica As Device for remote-controlled, submarine machining unit
WO2012108775A1 (en) * 2011-02-10 2012-08-16 Aker Subsea As Subsea clamp connector emergency release tool and method
WO2013080228A1 (en) * 2011-11-28 2013-06-06 Ts R & D S.R.L. Apparatus for cutting underwater structures
CN104648637A (en) * 2015-03-18 2015-05-27 重庆交通大学 Manipulator carrier for underwater operation
CN105711779A (en) * 2016-03-16 2016-06-29 河海大学常州校区 Underwater flushing robot with eight propellers
FR3063924A1 (en) * 2017-03-16 2018-09-21 Dodin Campenon Bernard POST CUTTING INSTALLATION OF AN ART WORK AND CUTTING METHOD

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8651098B2 (en) 2010-03-04 2014-02-18 MacTech, Inc. Apparatus, system and method for using a diamond-impregnated wire to cut an object
US9776265B2 (en) 2013-06-03 2017-10-03 MacTech, Inc. System, method and retractable and/or folding apparatus for cutting an object
US9636761B2 (en) 2013-07-25 2017-05-02 MacTech, Inc. Modular cutting system, method and apparatus
US9770761B2 (en) 2013-08-22 2017-09-26 MacTech, Inc. Tool bit apparatus, system, and method for cutting an object
NO338419B1 (en) * 2014-11-26 2016-08-15 1Diamond As Sawing system and method of salvage
EP3371376B1 (en) * 2015-11-07 2021-07-14 Oceaneering International Inc. Current shield
GB2566288B (en) * 2017-09-07 2022-04-13 Equinor Energy As Marine suction anchor
NO345448B1 (en) 2018-01-30 2021-02-01 1Diamond As Inclined cut GBS leg

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US4856938A (en) * 1987-07-28 1989-08-15 Bomag-Menck Gmbh Method of and arrangement for separating tubular foundation piles under water
EP0540834A1 (en) * 1991-11-06 1993-05-12 Francesco Matteucci Method and device for cutting underwater structures
US20040069103A1 (en) * 2001-03-20 2004-04-15 Francesco Matteucci Method and apparatus for cutting underwater structures

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US4168729A (en) * 1977-11-16 1979-09-25 The United States Of America As Represented By The Secretary Of The Navy Underwater self-gripping pile cutting device
EP0011894B1 (en) * 1978-12-04 1984-07-04 Shell Internationale Researchmaatschappij B.V. A method for installing a tubular element in the bottom of a body of water and apparatus for carrying out this method
US5107594A (en) * 1991-09-03 1992-04-28 Julian Ferreras Piling cutting tool
US7121310B2 (en) * 2003-05-02 2006-10-17 Clark Wilbur L Underwater pile cutting apparatus and method of use
US20080282857A1 (en) * 2007-05-16 2008-11-20 Khoury John J Cutting machine for use in removing damaged oilfield rigs and equipment located in offshore waters, and method of using same

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US4856938A (en) * 1987-07-28 1989-08-15 Bomag-Menck Gmbh Method of and arrangement for separating tubular foundation piles under water
EP0540834A1 (en) * 1991-11-06 1993-05-12 Francesco Matteucci Method and device for cutting underwater structures
US20040069103A1 (en) * 2001-03-20 2004-04-15 Francesco Matteucci Method and apparatus for cutting underwater structures

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2216117A1 (en) * 2009-02-10 2010-08-11 Betag-Betontaglio SA Rope saw and method for operating same
WO2011108939A1 (en) * 2010-03-05 2011-09-09 Mechanica As Device for remote-controlled, submarine machining unit
WO2012108775A1 (en) * 2011-02-10 2012-08-16 Aker Subsea As Subsea clamp connector emergency release tool and method
CN103328760A (en) * 2011-02-10 2013-09-25 阿克海底公司 Subsea clamp connector emergency release tool and method
GB2505301A (en) * 2011-02-10 2014-02-26 Aker Subsea As Subsea clamp connector emergency release tool and method
US8915676B2 (en) 2011-02-10 2014-12-23 Aker Subsea As Subsea clamp connector emergency release tool and method
RU2585292C2 (en) * 2011-02-10 2016-05-27 Акер Сабси АС Tool and method for emergency disconnection of clamping connection device under water
GB2505301B (en) * 2011-02-10 2018-05-16 Aker Solutions As Subsea clamp connector emergency release tool and method
WO2013080228A1 (en) * 2011-11-28 2013-06-06 Ts R & D S.R.L. Apparatus for cutting underwater structures
CN104648637A (en) * 2015-03-18 2015-05-27 重庆交通大学 Manipulator carrier for underwater operation
CN105711779A (en) * 2016-03-16 2016-06-29 河海大学常州校区 Underwater flushing robot with eight propellers
FR3063924A1 (en) * 2017-03-16 2018-09-21 Dodin Campenon Bernard POST CUTTING INSTALLATION OF AN ART WORK AND CUTTING METHOD

Also Published As

Publication number Publication date
GB2438349B (en) 2009-12-16
NO20074519L (en) 2007-12-27
US20080304915A1 (en) 2008-12-11
GB0717633D0 (en) 2007-10-24
GB2438349A (en) 2007-11-21

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