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 PDFInfo
- 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
Links
- 238000007667 floating Methods 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000009434 installation Methods 0.000 title description 10
- 238000005553 drilling Methods 0.000 claims abstract description 29
- 238000012423 maintenance Methods 0.000 claims abstract description 11
- 238000002955 isolation Methods 0.000 claims description 35
- 238000010079 rubber tapping Methods 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 230000007613 environmental effect Effects 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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)
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Earth Drilling (AREA)
Abstract
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)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/BR2021/050073 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)
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)
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 |
CA3094321A1 (fr) * | 2018-03-19 | 2019-09-26 | Resolve Marine Group, Inc. | Ensembles et systemes de perforation de reparation navale |
EP4143081A1 (fr) * | 2020-04-30 | 2023-03-08 | E M & I (Maritime) Limited | Procédé et appareil pour installer un batardeau, par exemple contre la coque d'un navire |
-
2021
- 2021-02-17 WO PCT/BR2021/050073 patent/WO2021237323A1/fr unknown
- 2021-02-17 EP EP21814494.7A patent/EP4157710A4/fr active Pending
Patent Citations (11)
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 |
Also Published As
Publication number | Publication date |
---|---|
EP4157710A1 (fr) | 2023-04-05 |
EP4157710A4 (fr) | 2024-07-03 |
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