WO2021237323A1 - Système et procédé pour faire passer un câble à travers la coque d'une unité flottante et installation d'un batardeau portable sans intervention de plongeur - Google Patents

Système et procédé pour faire passer un câble à travers la coque d'une unité flottante et installation d'un batardeau portable sans intervention de plongeur Download PDF

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Publication number
WO2021237323A1
WO2021237323A1 PCT/BR2021/050073 BR2021050073W WO2021237323A1 WO 2021237323 A1 WO2021237323 A1 WO 2021237323A1 BR 2021050073 W BR2021050073 W BR 2021050073W WO 2021237323 A1 WO2021237323 A1 WO 2021237323A1
Authority
WO
WIPO (PCT)
Prior art keywords
shell
floating unit
cable
positioning
cofferdam
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.)
Ceased
Application number
PCT/BR2021/050073
Other languages
English (en)
Inventor
Nelson Szilard GALGOUL
Aidin Rezvani SARABI
Victor Dobrochinski BARBOSA
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.)
NSG Engenharia Projetos e Representacao Comercial Ltda
Original Assignee
NSG Engenharia Projetos e Representacao Comercial Ltda
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 NSG Engenharia Projetos e Representacao Comercial Ltda filed Critical NSG Engenharia Projetos e Representacao Comercial Ltda
Priority to EP21814494.7A priority Critical patent/EP4157710A4/fr
Publication of WO2021237323A1 publication Critical patent/WO2021237323A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B17/00—Vessels parts, details, or accessories, not otherwise provided for
    • B63B17/0018—Arrangements or devices specially adapted for facilitating access to underwater elements, e.g. to propellers ; Externally attached cofferdams or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B81/00—Repairing or maintaining vessels

Definitions

  • This invention relates to the repair and maintenance of the shell or hull of floating units, such as any floating platform or vessel with floatation tanks, where said tanks are fully or partially submerged.
  • the technique is achieved by passing cables or ropes through the hull of the floating unit.
  • the present method provides a dry working area for offshore floating units, using portable cofferdam, without the need of divers for placement of portable cofferdam into its position.
  • Floating units such as any floating platform or vessel with floatation tanks, where said tanks are fully or partially submerged require specific methods and technology for repair and maintenance of their hull as going to the dry dock is not practical.
  • Portable cofferdams are widely used to provide a dry working area, due to their size, portability, and reusability, making it safe to perform a repair and maintenance of the hull of a floating unit.
  • the portable cofferdam is a portable enclosure composed by the water barrier (portable cofferdam itself), water discharge pump, vent connections, dewatering hoses, lifting connections and lifting lines.
  • the water discharge pump dewaters the portable cofferdam, pumping water out through the discharge hoses, providing a dry and safe working area for repair and maintenance.
  • Lifting lines are used for lowering of portable cofferdam, by hanging it down from any lifting appliance.
  • the portable cofferdam is lowered to the proximity of the repair area with a lifting appliance, such as a crane, and finally positioned to the target repair area with divers who control the portable cofferdam movements due to ocean waves and currents.
  • a lifting appliance such as a crane
  • This procedure is unsafe for the divers, costly and takes a long time because it is very dependent upon the environmental and weather conditions.
  • US10435860 present a portable cofferdam designed for isolating a working area from water such as a culvert.
  • the device provides the dewatering of the desired working area, allowing the cutting of the floating hull or any other necessary work on the area. Due to its portability and durability, it can be fished back to the deck, prepared again, and relaunched for the repairing of a new area.
  • US10011145 and W02015/002742 present an apparatus for inspecting and small repairing of flooded cavities in a floating offshore installation, on the wall of a pipe, sea chest or other flooded cavity within the hull of a ship or floating offshore installation.
  • This technology is only used for inspection purposes, or small repairing, such as replacement of damaged pipe sections, US6241424, and removing blockages in subsea pipelines, US6200068.
  • This invention presents new apparatuses and methods for passing a rope or cable through the hull and guiding a portable cofferdam to the desired repair or maintenance area without diver intervention.
  • the presented invention uses a sealed cutting apparatus to make a hole directly on the hull of a floating unit.
  • another sealed apparatus is used to pass the cable or rope through the hull of a floating unit.
  • This rope or cable may be fished from the floating unit deck, to be used as a positioning cable for a portable cofferdam.
  • the positioning cables may be tensioned from inside the floating unit hull, to achieve proper sealing and provide a dry working area for the repair or maintenance of the floating unit hull itself.
  • This invention makes it possible to install the portable cofferdam without diver intervention. Traditionally, always the diver intervention is required for portable cofferdam installation.
  • a system for passing a cable through the shell of a floating unit which comprises:
  • the positioning cable can has attached a buoy, the positioning cable can be connected to a fishing line, the equipment for cutting or drilling a hole in the shell of a structure can be a hot tapping tool, the equipment used to lift, tow or sustain loads can be a winch and the shell of a floating unit can be a hull of a floating unit.
  • a system for conceiving a dry working area on the shell of a floating unit without diver intervention comprises:
  • the portable cofferdam can be a guided cofferdam and the shell of the floating unit can be the hull of a floating unit.
  • the guided cofferdam comprises:
  • the hot tapping comprising:
  • each positioning cable comprises:
  • the cable deployment tool comprises:
  • the pushing launching arm comprises:
  • the method related to the system for passing a cable through the shell of a floating unit comprises: a.cutting or drilling a hole on the shell of a floating unit with an equipment for cutting or drilling a hole in the shell of a structure; b.closing the isolation valve and removing the equipment for cutting or drilling a hole in the shell of a floating unit; c.connecting the cable deployment tool to the isolation valve; d.passing one rope or cable connected to the equipment used to lift, tow or sustain loads through the mechanical seals; e.connecting the end termination to set up the positioning cable; f.connecting the cable deployment tool to the isolation valve; g.opening the isolation valve and passing positioning cable throughout the hole on the shell using the pushing launching arm or the threaded launching arm; h.repeat steps (a) to (g) until the desired number of positioning cables is reached; and i.catching the positioning cables on the seaside or wet side of the shell floating unit.
  • the method is composed by the following steps: cutting or drilling a hole on the shell of a floating unit with an equipment for cutting or drilling a hole in the shell of a structure; closing the isolation valve and removing the equipment for cutting or drilling a hole in the shell of a floating unit; connecting the cable deployment tool to the isolation valve; passing one rope or cable connected to the equipment used to lift, tow or sustain loads through the mechanical seals; connecting the end termination to set up the positioning cable; connecting the cable deployment tool to the isolation valve; opening the isolation valve and passing positioning cable throughout the hole on the shell using the pushing launching arm or the hot; repeat steps to pass the cable until the desired number of positioning cables is reached; catching the positioning cables on the seaside or wet side of the shell floating unit; pulling the positioning cables up to the deck of a floating unit, where the portable cofferdam is seated on deck; connecting the positioning cables to the guiding connections
  • the shell of the floating unit is ready to be repaired or get maintenance as both sides of the shell are dry and the shell may be cut with no water ingress to the floating unit. It is important to notice that the equipment for cutting or drilling a hole in the shell of a structure can be a hot tapping, the equipment used to lift, tow or sustain loads can be a winch and the shell of the floating unit can be a hull of a floating unit.
  • the method wherein before to cut a hole on the shell of the floating unit with the hot tapping tool comprises these additional steps: a.welding the pipe stub to the dry side of the shell of the floating unit; b.connecting the isolation valve to the pipe stub; and c.connecting the hot tapping tool to the isolation valve .
  • this invention is applied to any offshore installation comprising a floating unit with floating tanks, where said tanks are fully or partially submerged.
  • the fed cables end can be connected to a buoy for facilitating fishing of said cables, specially on hard environment conditions, such as windy weather and rough sea.
  • this method provides a diverless technic of repair of a shell of a submersible structure.
  • FIG. 1 shows the pipe stub (6) welded from the inside to the floating unit hull (9).
  • FIG. 2 shows the installation of an isolation valve (7) to the pipe stub (6).
  • FIG. 3 contains an example of the hot tapping device for use in this invention, comprising a valve chamber, a pressurized chamber, a tap cutter (21), a pilot drill (22), and tapping machine (23).
  • FIG.4 shows the installation of the hot tapping device to the isolation valve (7).
  • FIG.4 shows the hot tapping device drilling from the inside to the floating unit hull (9).
  • FIG. 5a contains the cable deployment tool (5) parts of the flange (51), pushing launching arm (52), mechanical seals (53), and chamber (54) before the cable passing process.
  • FIG. 5b contains the cable deployment tool (5) parts of the flange (51), pushing launching arm (52), mechanical seals (53), and chamber (54) after the cable passing process.
  • FIG. 6a, FIG. 6b and FIG. 6c contains a schematic description of the cables (3) feeding through the cable deployment tool (5) throughout the holes on the floating unit hull (9).
  • FIG. 6d, FIG. 6e and FIG. 6f contains a schematic description of the cables (3) feeding through the cable deployment tool (5) with optional attached floats (33) being available to be fished on the outside of the floating unit hull (9).
  • FIG. 7 contains a schematic description of the portable cofferdam (1) being guided by the positioning cables (3), while being lowered by a lifting appliance.
  • FIG. 8 contains a schematic description of the vessel hull (7) with the cables (3) passed through the holes on the vessel hull (7). At this moment the portable cofferdam can be pulled against the shell to achieve proper sealing.
  • FIG. 9 contains a schematic description of the guided cofferdam (1) with cofferdam body (11), lifting connections (12), guiding connections (13), sealing (14), dewatering connection (15) and the cables (3).
  • the positioning cable can has attached a buoy (33), the positioning cable can be connected to a fishing line (10), the equipment for cutting or drilling a hole in the shell of a structure (2) can be a hot tapping tool, the equipment used to lift, tow or sustain loads (4) can be a winch and the shell of a floating unit can be the hull of a floating unit (9).
  • the portable cofferdam (1) can be a guided cofferdam (2) and the shell of the floating unit can be the hull of a floating unit (9).
  • this structure comprises:
  • this structure comprises:
  • this structure comprises:
  • this structure comprises:
  • this structure comprises:
  • the first system is related to a method for passing a cable through the shell of a floating unit.
  • the method is composed by the following steps: cutting or drilling a hole on the shell of a floating unit with an equipment for cutting or drilling a hole (2) in the shell of a structure; closing the isolation valve(7) and removing the equipment for cutting or drilling a hole in the shell of a floating unit; connecting the cable deployment tool(5) to the isolation valve(7); passing one rope or cable (31) connected to the equipment used to lift, tow or sustain loads (4) through the mechanical seals(53); connecting the end termination (32) to set up the positioning cable(3); connecting the cable deployment tool(5) to the isolation valve (23); opening the isolation valve (23) and passing positioning cable (3) throughout the hole on the shell using the pushing launching arm (52) or the threaded launching arm; repeat steps (a) to (g) until the desired number of positioning cables(3) is reached; taking into account that those positioning cables can float with the help of a buoy (33) in your extremity; catching the positioning cables(3) on the seaside or
  • the hot tapping device is sealed, what makes it possible to open the isolation valve (7) without flooding the floating unit tank.
  • the pilot drill (22) and tap cutter (21) is able to access the hull and make the hole.
  • the second system is related to a method for conceiving a dry working area on the hull of a floating unit without diver intervention.
  • the method is composed by the following steps: cutting or drilling a hole on the shell of a floating unit with an equipment for cutting or drilling a hole (2) in the shell of a structure; closing the isolation valve (7) and removing the equipment for cutting or drilling a hole in the shell of a floating unit; connecting the cable deployment tool(5) to the isolation valve(7); passing one rope or cable (31) connected to the equipment used to lift, tow or sustain loads (4) through the mechanical seals(53); connecting the end termination (32) to set up the positioning cable (3); connecting the cable deployment tool(5) to the isolation valve (23); opening the isolation valve (23) and passing positioning cable (3) throughout the hole on the shell using the pushing launching arm(52) or the threaded launching arm; repeat steps to pass the cable until the desired number of positioning cables(3) is reached; catching the positioning cables(3) on the seaside or wet side of the shell floating unit(9); pulling the positioning cables(3)

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

La présente invention concerne la réparation et l'entretien de la coque d'unités en mer flottantes telles que des navires, des plates-formes flottantes, des plates-formes de forage flottantes et des tours éoliennes en mer. Des modes de réalisation particulièrement illustratifs concernent les présents appareils et le procédé pour faire passer un câble ou une corde à travers la coque d'une unité flottante et l'installation, sans intervention de plongeur, d'un batardeau portable qui fournit une zone de travail sèche pour des unités flottantes en mer.
PCT/BR2021/050073 2020-05-28 2021-02-17 Système et procédé pour faire passer un câble à travers la coque d'une unité flottante et installation d'un batardeau portable sans intervention de plongeur Ceased WO2021237323A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21814494.7A EP4157710A4 (fr) 2020-05-28 2021-02-17 Système et procédé pour faire passer un câble à travers la coque d'une unité flottante et installation d'un batardeau portable sans intervention de plongeur

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202063031414P 2020-05-28 2020-05-28
US63/031,414 2020-05-28

Publications (1)

Publication Number Publication Date
WO2021237323A1 true WO2021237323A1 (fr) 2021-12-02

Family

ID=78745716

Family Applications (1)

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PCT/BR2021/050073 Ceased WO2021237323A1 (fr) 2020-05-28 2021-02-17 Système et procédé pour faire passer un câble à travers la coque d'une unité flottante et installation d'un batardeau portable sans intervention de plongeur

Country Status (2)

Country Link
EP (1) EP4157710A4 (fr)
WO (1) WO2021237323A1 (fr)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3401664A (en) * 1966-06-27 1968-09-17 Mitsubishi Heavy Ind Ltd Apparatus for fixing a waterproof band for use in the cutting or the joining of a structure floating on the water
US3857249A (en) * 1973-03-22 1974-12-31 T Kelly Cofferdam
US4161155A (en) * 1978-06-30 1979-07-17 Cloutier Charles C Patch for ship hulls
US4175510A (en) * 1977-10-25 1979-11-27 Devine Thomas H Cofferdam
US5009180A (en) * 1990-09-07 1991-04-23 Holt William T Hull hole closure for an oil tanker
US5036786A (en) * 1990-03-23 1991-08-06 Joseph Uri Patch system for ship hulls
US5165356A (en) * 1991-12-13 1992-11-24 Phillip A. Steele Magnetic ship hull patch
WO2006072675A1 (fr) * 2005-01-03 2006-07-13 Ropart Jean-Francois Dispositif pour obstruer une voie d’eau sur un bateau
US20130000538A1 (en) * 2011-06-30 2013-01-03 John Patrick Connolly Exterior hull patch
US20130139740A1 (en) * 2011-12-02 2013-06-06 John Connolly Oil Leak Containment System for a Ship hard Aground
GB2498164B (en) * 2010-10-28 2016-09-14 Republic Of Korea (Korea Coast Guard Commissioner) Apparatus for the emergency plugging of a puncture in a marine vessel

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3641774A (en) * 1970-01-30 1972-02-15 Kaiser Steel Corp Method and apparatus for fabricating an offshore structure
US6200068B1 (en) * 1998-02-06 2001-03-13 Sonsub, Inc. Hot tap fluid blaster apparatus and method of using same
US6241424B1 (en) * 1998-03-17 2001-06-05 Sonsub Inc. Method and apparatus for replacing damaged section of a subsea pipeline without loss of product or entry of seawater
GB201210929D0 (en) * 2012-06-20 2012-08-01 E M & I Maritime Ltd Apparatus and method
ITMI20130693A1 (it) * 2013-04-26 2014-10-27 Fincantieri Cantieri Navali It Metodo per la manutenzione di un propulsore retrattile
US20160138747A1 (en) * 2013-07-02 2016-05-19 Johnny Butler System for cutting a workpiece and method for the same
GB2520688B (en) * 2013-11-27 2019-05-01 E M & I Maritime Ltd Apparatus and method for inspecting flooded cavities in a floating offshore installation
KR101880242B1 (ko) * 2017-04-18 2018-07-20 주식회사 도우 코퍼댐
WO2019182958A1 (fr) * 2018-03-19 2019-09-26 Resolve Marine Group, Inc. Ensembles et systèmes de perforation de réparation navale
EP4143081B1 (fr) * 2020-04-30 2024-11-06 E M & I (Maritime) Limited Procédé et appareil pour installer un batardeau, par exemple contre la coque d'un navire

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3401664A (en) * 1966-06-27 1968-09-17 Mitsubishi Heavy Ind Ltd Apparatus for fixing a waterproof band for use in the cutting or the joining of a structure floating on the water
US3857249A (en) * 1973-03-22 1974-12-31 T Kelly Cofferdam
US4175510A (en) * 1977-10-25 1979-11-27 Devine Thomas H Cofferdam
US4161155A (en) * 1978-06-30 1979-07-17 Cloutier Charles C Patch for ship hulls
US5036786A (en) * 1990-03-23 1991-08-06 Joseph Uri Patch system for ship hulls
US5009180A (en) * 1990-09-07 1991-04-23 Holt William T Hull hole closure for an oil tanker
US5165356A (en) * 1991-12-13 1992-11-24 Phillip A. Steele Magnetic ship hull patch
WO2006072675A1 (fr) * 2005-01-03 2006-07-13 Ropart Jean-Francois Dispositif pour obstruer une voie d’eau sur un bateau
GB2498164B (en) * 2010-10-28 2016-09-14 Republic Of Korea (Korea Coast Guard Commissioner) Apparatus for the emergency plugging of a puncture in a marine vessel
US20130000538A1 (en) * 2011-06-30 2013-01-03 John Patrick Connolly Exterior hull patch
US20130139740A1 (en) * 2011-12-02 2013-06-06 John Connolly Oil Leak Containment System for a Ship hard Aground

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4157710A4 *

Also Published As

Publication number Publication date
EP4157710A1 (fr) 2023-04-05
EP4157710A4 (fr) 2024-07-03

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