NL2016740B1 - Moon pool for a ship or marine platform and sliding hatch cover there for, and method for lowering and lifting tools and/or instruments. - Google Patents

Moon pool for a ship or marine platform and sliding hatch cover there for, and method for lowering and lifting tools and/or instruments. Download PDF

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Publication number
NL2016740B1
NL2016740B1 NL2016740A NL2016740A NL2016740B1 NL 2016740 B1 NL2016740 B1 NL 2016740B1 NL 2016740 A NL2016740 A NL 2016740A NL 2016740 A NL2016740 A NL 2016740A NL 2016740 B1 NL2016740 B1 NL 2016740B1
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NL
Netherlands
Prior art keywords
moon pool
opening
cover
instruments
ship
Prior art date
Application number
NL2016740A
Other languages
Dutch (nl)
Inventor
Van Der Ploeg Evert
Gerardus Grijze Antonius
Van Der Ploeg Patrick
Original Assignee
Parosha Holding B V
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 Parosha Holding B V filed Critical Parosha Holding B V
Priority to NL2016740A priority Critical patent/NL2016740B1/en
Application granted granted Critical
Publication of NL2016740B1 publication Critical patent/NL2016740B1/en

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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 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/16—Arrangement of ship-based loading or unloading equipment for cargo or passengers of lifts or hoists
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B19/00—Arrangements or adaptations of ports, doors, windows, port-holes, or other openings or covers
    • B63B19/12—Hatches; Hatchways
    • B63B19/14—Hatch covers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B3/00—Hulls characterised by their structure or component parts
    • B63B3/14—Hull parts
    • B63B2003/147—Moon-pools, e.g. for offshore drilling vessels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/16—Arrangement of ship-based loading or unloading equipment for cargo or passengers of lifts or hoists
    • B63B2027/165—Deployment or recovery of underwater vehicles using lifts or hoists

Abstract

The present invention relates to a moon pool for a ship or marine platform, ship or marine platform comprising such moon pool, and a method for lowering and lifting tools and/or instruments. The moon pool according to the invention comprises: - an opening giving access to a room and/or water below; - a guiding construction configured for lowering and lifting tools and/or instruments to and from the room and/or water; - a hatch cover configured for covering the opening, wherein the guiding construction is at least partly provided in the opening and comprises a moveable guiding part that can be moved between an activated position enabling lowering and lifting tools and/or instruments and a retracted position enabling the hatch cover to cover the opening.

Description

Moon pool for a ship or marine platform and sliding hatch cover there for, and method for lowering and lifting tools and/or instruments
The present invention relates to a moon pool for a ship or marine platform. A moon pool is used in ships including drill ships, diving support vessels, cable laying vessel, pipe laying vessel, and research vessels, and also marine platforms including drilling platforms. A moon pool provides an opening in the ship or platform giving access to the room and/or water below.
Conventional moon pools are known from drilling platforms that are often located above the sea level. Also known are moon pools that are applied to ships or vessels. These moon pools can be located below the water line. A problem with conventional moon pools is related to safety issues associated with the presence of an opening to the water below. Some of the conventional moon pools are provided with separate hatches that are placed on the opening and/or pivotable hatches. This requires additional handling and manoeuvring of the hatches or covers. Furthermore, these hatches still involve safety risks when working with a moon pool.
It is an objective of the present invention to improve the safety and/or efficiency of a moon pool, thereby obviating or at least reducing the aforementioned problems.
This is achieved with the moon pool for a ship or marine platform according to the present invention, wherein the moon pool comprising: an opening giving access to a room and/or water below; a guiding construction configured for lowering and lifting tools and/or instruments to and from the room and/or water; a hatch cover configured for covering the opening, wherein the guiding construction is at least partly provided in the opening and comprises a moveable guiding part that can be moved between an activated position enabling lowering and lifting tools and/or instruments and a stored position enabling the hatch cover to cover the opening.
Providing an opening in a ship or marine platform enables access to the room and/or water below the opening. This opening is provided in a ship or marine platform including drill ships, diving support vessels, cable laying vessel, pipe laying vessel, research vessels and marine platforms, such as marine drilling platforms. Lifting tools and/or instruments include remote operated vehicles (ROV), diving bells, drilling equipment, measuring equipment such as a sonar. The lifting tools and/or instruments can be lowered to the water and/or lifted therefrom, using the guiding construction of the moon pool.
According to the present invention, the guiding construction is at least partly provided in the opening and comprises a movable guiding part. By providing a movable guiding part, at least two different states or modes of operation can be distinguished.
In an activated position of the moveable guiding part, the movable guiding part is brought in line with the guiding construction, preferably in line with a guiding rail thereof. When the movable guiding part is in the activated position, lifting tools and/or instruments can be moved effectively from and/or to the water.
In a retracted or stored position, the movable guiding part is moved relative to the opening or stationary part of the guiding construction. According to the invention, in this retracted position of the moveable guiding part, a sliding hatch cover can be positioned over or in the opening, thereby obviating or preventing safety risks associated with the presence of a moon pool in a ship or marine platform.
The sliding hatch cover is configured to cover the opening of the moon pool with the movable guiding part being in the retracted position. More specifically, when sliding the hatch cover over the opening, the movable guiding part is in the retracted position or being moved towards the retracted position. Moving the moveable guiding part from the opening removes the guiding structure from the opening to enable access to the hatch cover and enabling an effective positioning thereof. Providing the moveable guiding part in accordance with the invention also contributes to a safety improvement by preventing safety risks.
The sliding hatch cover preferably moves along rails using a number of wheels that are attached to the sliding hatch cover. This renders the positioning and manoeuvring of the hatch cover easy and improves possibilities for automated safety control by closing the opening after finishing the operations involving the moon pool. The sliding hatch cover is preferably provided with a drive, preferably using one or more hydraulic cylinders, screw spindles using electro or hydro motors, a gear rack with electro or hydro motors or any other convenient drive.
The use of a sliding hatch cover enables an effective closing of the opening of the moon pool. This closure of the opening reduces the air flow caused by waves in the moon pool, for example. Also, the sliding hatch cover provides a safe environment for the crew of the ship or marine platform. Also, it provides a protection from water entering or damaging equipment in or on the ship or platform. Preferably, a number of sensors is provided to determine and control the actual position of the sliding hatch cover. This further improves the safety of working with the moon pool. Although the sliding hatch cover is preferably applied to a moon pool enabling access to the water below, it is also possible to apply the sliding hatch cover to other openings that may provide access to a room below, such as a ship’s hold.
In a presently preferred embodiment, the guiding construction comprises a drive for moving the movable guiding part. The drive may involve the use of hydraulic cylinders or screw spindles with electro or hydro motors. The movable guiding part preferably involves a rail, or so-called cursor rail. By providing a drive, the movement of the movable guiding part can be automated and included in the operation involving the moon pool according to the present invention. Preferably, the moon pool is provided with sensors monitoring the actual state or position of movable elements of the moon pool, for example the movable guiding part and/or the sliding hatch cover as mentioned earlier.
In one of the presently preferred embodiments, the movable guiding part comprises a hinge for enabling a rotational movement of the movable guiding part relative to the opening or stationary part of the guiding construction. The rotational movement enables bringing the movable guiding part in line with the stationary part, thereby enabling lowering and lifting of tools and/or instruments.
In an alternative embodiment, the movable guiding part comprises a telescopic element, configured for enabling a telescopic movement of the movable guiding part relative to the opening or stationary part of the guiding construction. This telescopic movement provides an effective movement of the guiding part between the activated and retracted positions.
In a further preferred embodiment according to the invention, the moon pool further comprises a hatch housing for storing the sliding hatch cover after activating the moon pool.
By providing a hatch housing, the sliding hatch cover can be retracted effectively. Further, the hatch housing may be used to carry equipment. Furthermore, the hatch housing may provide a water tight connection, thereby improving safety and/or improving possibilities for the applicability of the moon pool. The use of a hatch housing is especially beneficial when the opening is provided in the ship’s bottom hull. For example, such application is used for providing sonar equipment in a research vessel and/or may relate to a so-called bow thruster. It will be understood that other applications involving such housing could also be envisaged in accordance with the invention.
In a further preferred embodiment according to the present invention, the sliding hatch cover comprises at least two cover parts.
By providing a number of cover parts, for example two cover parts, the sliding hatch cover can be positioned and manoeuvred more effectively. Furthermore, in one of the presently preferred embodiments, the sliding hatch cover is moved over two separate sliding hatch cover guide sets that are configured for moving cover parts to different sides of the opening. For example, by providing the sliding hatch cover with two cover parts, one of the parts can be moved to the left hand side of the opening and the other part can be moved to the right hand side of the opening when activating the moon pool.
In a further presently preferred embodiment according to the present invention, the sliding hatch cover comprises a carrying structure capable of carrying tools and/or instruments.
By providing a carrying structure, equipment such as tools and/or instruments can be moved effectively over the ship or platform.
The present invention further relates to a sliding hatch cover for a moon pool and/or a ship or marine platform comprising a moon pool with a sliding hatch cover as described earlier.
Such sliding hatch cover and/or ship or marine platform provides the same effects or advantages as described for the moon pool. The sliding hatch cover may also be applied to cover other openings in a ship’s deck, such as for a ship’s hold.
In particular, the ship or marine platform with the moon pool provides a safe working environment.
The invention further also relates to a method for lowering and lifting tools and/or instruments, the method comprising the steps of: providing a moon pool as described earlier; removing the hatch cover from the opening; moving the moveably guiding part into the activated position in the opening; lowering and/or lifting tools and/or instruments; moving the moveably guiding part into the retracted position; and covering the opening with the hatch cover.
The method provides the same effects and advantages as described for the moon pool, ship or marine platform.
Further advantages, features and details are elucidated on the basis of preferred embodiments thereof, wherein reference is made to the accompanying drawings, in which: - figure 1 shows the moon pool according to the present invention in opened/activated position; - figure 2 shows the moon pool of figure 1 in a closed position; - figure 3 shows an alternative embodiment of the moon pool in an opened position; - figure 4 shows the moon pool of figure 3 in a closed position; - figure 5A-E shows different embodiments of the movable guiding parts; - figure 6 shows an alternative embodiment of a moon pool provided in the ship’s bottom hull.
Ship 2 (Figure 1) is provided with moon pool 4 comprising lower opening 6, channel or chamber 8 extending between lower opening 6 and upper opening 10. In the illustrated embodiment sliding hatch cover 12, 14 comprises first hatch 12 and second hatch 14 that are movable along two guide rails 16 with the use of hydraulic cylinder 18 as a drive. Hydraulic cylinder 18 is at a first end connected via connection 20 to ship 2 and at a second end via connection 22 to sliding hatch cover 12, 14.
Guiding construction or guide rails 24 are provided in opening 10, comprising movable guiding part 26. In the illustrated embodiment, two guide rails 24 are provided. It will be understood that another number of guide rails 24 in opening 10 could also be envisaged. Moveable guiding part 26 is moved with the use of drive 28 that is connected to frame 30 of ship 2. In the illustrated embodiment, sensors 32, 34 are provided to monitor the actual position of movable part 26 and sliding hatch cove 12, 14, respectively.
After the operation with moon pool 4 has terminated, outer opening 10 is covered by moving sliding hatch cover 12, 14 (Figure 2) over opening 10. This provides a safe working environment for people on ship 2. In this position, movable guide parts 26 have been rotated around pivot axes 36 with hinges 38. This movement is performed with the use of hydraulic drive 28. In the illustrated embodiment this movement brings movable part 26 from a substantially vertical position in line with rail 24 (Figure 1) into a substantially horizontal direction in the retracted or stored position (Figure 2). It will be understood that other positions of movable part 26, especially in the retracted or stored position, can also be envisaged in accordance with the present invention.
In another embodiment, moon pool 40 (Figures 3 and 4) is provided with sliding hatch cover 12, 14 that can be moved in opposite directions, using guide rails 16a, 16b, respectively. This movement of covers 12, 14 of sliding hatch cover in opposite direction provides an alternative to moon pool 4 with movement of a single or coupled sliding hatch cover 12, 14.
After operations with moon pool 40 have been terminated, hatch covers 12, 14 are moved towards each other, thereby closing opening 10 of moon pool 40. Configuration of moon pool 40 with sideways relative movement of sliding hatch cover parts 12, 14 has the advantage that opening 10 can be closed faster. A further advantage is that the amount of space that is required can be reduced.
In the illustrated embodiments of moon pool 4, 40, movable guide part 26 is moved involving a rotational movement. It will be understood that other movements could also be envisaged in accordance with the invention (Figure 5A-E). An overview (Figure 5A) illustrates the different possibilities of rotational and/or translational (including telescopic) movement of guide part 26 relative to rail 24. For example, moveable guide part 26 may rotate horizontally towards the side of guide 24 (Figure 5B). Also, movable guiding part 26 may rotate upwards or downwards to the side of guide rail 24 (Figure 5C). In a further alternative embodiment, movable guiding part 26 moves upwards or downwards towards the front or back of guide rail 24 (Figure 5D). Also, movable guiding part 26 may move in a translational direction parallel to guide rail 24 (Figure 5E), including a telescopic movement.
In a further embodiment, moon pool 42 comprises box 44 (Figure 6). Tool 46 is movably attached to box 44. For example, tool 46 may relate to sonar equipment. Sliding hatch cover 48 is capable of covering and releasing opening 50 by extending and retracting hatch 48 with cylinder 52 into housing 54. In the illustrated embodiment, housing 54 is fully sealed with seal 56 to provide a water tight environment. In the illustrated embodiment, moon pool 42 is provided in the ship’s bottom hull 58.
When measurements or other operations are required, hatch cover 48 is retracted into housing 54 by activating cylinder(s) 52. Tool 46 is lowered into the water and measurements can be performed. Afterwards, tool 46 is retracted into box 44 and hatch cover 48 is returned to its position, covering opening 50. This protects tool 46 and prevents, or at least reduces, the effects of waves acting on the ship.
The present invention is by no means limited to the above described preferred embodiments thereof. The rights sought are defined by the following claims, within the scope of which many modifications can be envisaged. For example, sliding hatch covers 12, 14 are preferably made of steel. However, the use of other materials as an alternative or in combination with steel could also be envisaged, including the use of composite materials.
Clauses 1. Moon pool for a ship or marine platform, the moon pool comprising: an opening giving access to a room and/or water below; a guiding construction configured for lowering and lifting tools and/or instruments to and from the room and/or water; a sliding hatch cover configured for covering the opening, wherein the guiding construction is at least partly provided in the opening and comprises a moveable guiding part that can be moved between an activated position enabling lowering and lifting tools and/or instruments and a retracted position enabling the sliding hatch cover to cover the opening. 2. Moon pool according to clause 1, wherein the guiding construction comprises a drive for moving the moveable guiding part. 3. Moon pool according to clause 1 or 2, wherein the moveable guiding part comprises a hinge configured for enabling a rotational movement of the moveable guiding part relative to the opening. 4. Moon pool according to clause 1, 2 or 3, wherein the moveable guiding part comprises a telescopic element configured for enabling a telescopic movement of the moveable guiding part relative to the opening. 5. Moon pool according to one or more of the foregoing clauses, further comprising a hatch housing for storing the sliding hatch cover after activating the moon pool. 6. Moon pool according to one or more of the foregoing clauses, wherein the sliding hatch cover comprises at least two cover parts. 7. Moon pool according to clause 6, further comprising at least two separate sliding hatch cover guides configured for moving cover parts to different sides of the opening. 8. Moon pool according to one or more of the foregoing claims, wherein the sliding hatch cover comprises a carrying structure capable of carrying tools and/or instruments. 9. Sliding hatch cover for a moon pool according to one or more of the foregoing clauses. 10. Ship or marine platform comprising a moon pool with a sliding hatch cover according to one or more of the foregoing clauses. 11. Method for lowering and lifting tools and/or instruments, the method comprising the steps of: providing a moon pool according to one or more of the clauses 1-8; removing the hatch cover from the opening; moving the moveably guiding part into the activated position in the opening; lowering and/or lifting the tools and/or instruments; moving the moveable guiding part into the retracted position; and covering the opening with the hatch cover.

Claims (11)

1. Moon pool voor een schip of maritiem platform, waarbij de moon pool omvattende: een opening toegang gevend tot een kamer en/of het onderliggend water; een geleidingsconstructie geconfigureerd voor het neerlaten en heffen van gereedschappen en/of instrumenten in en uit de kamer en/of het water; een schuifbare afdekking, geconfigureerd voor het afdekken van de opening, waarin de geleidingsconstructie ten minste gedeeltelijk voorzien is in de opening en een beweegbaar geleidingsdeel omvat die kan worden bewogen tussen een geactiveerde positie waarin het neerlaten en heffen van gereedschappen en/of instrumenten mogelijk is in een teruggetrokken positie waarin het mogelijk is dat de schuifbare afdekking de opening afdekt.A moon pool for a ship or maritime platform, the moon pool comprising: an opening giving access to a room and / or the underlying water; a guide structure configured to lower and raise tools and / or instruments in and out of the chamber and / or water; a slidable cover configured to cover the opening, wherein the guide structure is at least partially provided in the opening and comprises a movable guide part that can be moved between an activated position in which the lowering and lifting of tools and / or instruments is possible in a retracted position in which it is possible for the sliding cover to cover the opening. 2. Moon pool volgens conclusie 1, waarin de geleidingsconstructie een aandrijving omvat voor het bewegen van het beweegbare geleidingsdeel.The moon pool according to claim 1, wherein the guide structure comprises a drive for moving the movable guide part. 3. Moon pool volgens conclusie 1 of 2, waarin het beweegbare geleidingsdeel een scharnier omvat geconfigureerd voor het mogelijk maken van een rotatiebeweging van het beweegbare geleidingsdeel relatief ten opzichte van de opening.3. Moon pool according to claim 1 or 2, wherein the movable guide part comprises a hinge configured to enable a rotational movement of the movable guide part relative to the opening. 4. Moon pool volgens conclusies 1, 2 of 3, waarin het beweegbare geleidingsdeel een telescopisch element omvat geconfigureerd voor het mogelijk maken van een telescopische beweging van het beweegbare geleidingsdeel relatief ten opzichte van de opening.A moon pool according to claim 1, 2 or 3, wherein the movable guide part comprises a telescopic element configured to enable a telescopic movement of the movable guide part relative to the opening. 5. Moon pool volgens één of meer van de voorgaande conclusies, verder omvattende een afdekbehuizing voor het opslaan van de schuifbare afdekking na het activeren van de moon pool.The moon pool according to one or more of the preceding claims, further comprising a cover housing for storing the sliding cover after the moon pool is activated. 6. Moon pool volgens één of meer van de voorgaande conclusies, waarin de schuifbare afdekking ten minste twee afdekdelen omvat.6. Moon pool according to one or more of the preceding claims, wherein the sliding cover comprises at least two cover parts. 7. Moon pool volgens conclusie 6, verder omvattende ten minste twee separate schuifbare afdekkingsgeleiders, geconfigureerd voor het bewegen van afdekdelen naar verschillende zijden van de opening.The moon pool according to claim 6, further comprising at least two separate sliding cover guides, configured to move cover parts to different sides of the opening. 8. Moon pool volgens één of meer van de voorgaande conclusies, waarin de schuifbare afdekking een draagstructuur omvat, geschikt voor het dragen van gereedschappen en/of instrumenten.8. Moon pool according to one or more of the preceding claims, wherein the sliding cover comprises a support structure suitable for carrying tools and / or instruments. 9. Schuifbare afdekking voor een moon pool volgens één of meer van de voorgaande conclusies.9. Slidable cover for a moon pool according to one or more of the preceding claims. 10. Schip of maritiem platform omvattende een moon pool met een schuifbare afdekking volgens één of meer van de voorgaande conclusies.A ship or maritime platform comprising a moon pool with a sliding cover as claimed in one or more of the preceding claims. 11. Werkwijze voor het neerlaten en heffen van gereedschappen en/of instrumenten, waarbij de werkwijze omvattende de stappen: het voorzien van een moon pool volgens één of meer van de conclusies 1-8; het verwijderen van de afdekking van de opening; het bewegen van het beweegbare geleidingsdeel in de geactiveerde positie in de opening; het neerlaten en/of heffen van de gereedschappen en/of instrumenten; het bewegen van het beweegbare geleidingsdeel in de teruggetrokken positie; en het afdekken van de opening met de afdekking.A method for lowering and raising tools and / or instruments, the method comprising the steps of: providing a moon pool according to one or more of claims 1-8; removing the cover from the opening; moving the movable guide member to the activated position in the opening; lowering and / or lifting the tools and / or instruments; moving the movable guide member in the retracted position; and covering the opening with the cover.
NL2016740A 2016-05-09 2016-05-09 Moon pool for a ship or marine platform and sliding hatch cover there for, and method for lowering and lifting tools and/or instruments. NL2016740B1 (en)

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Application Number Priority Date Filing Date Title
NL2016740A NL2016740B1 (en) 2016-05-09 2016-05-09 Moon pool for a ship or marine platform and sliding hatch cover there for, and method for lowering and lifting tools and/or instruments.

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Application Number Priority Date Filing Date Title
NL2016740A NL2016740B1 (en) 2016-05-09 2016-05-09 Moon pool for a ship or marine platform and sliding hatch cover there for, and method for lowering and lifting tools and/or instruments.

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NL2016740B1 true NL2016740B1 (en) 2017-11-16

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112407186A (en) * 2020-11-23 2021-02-26 江南造船(集团)有限责任公司 Moon pool system installation method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2865319A (en) * 1954-10-07 1958-12-23 Internat Macgregor Organizatio Hatch-covers arrangements
WO2012146622A1 (en) * 2011-04-26 2012-11-01 Ihc Holland Ie B.V. Vessel comprising a moon pool and a hoisting arrangement and method of lowering items into the sea
GB2526134A (en) * 2014-05-15 2015-11-18 Technip France Moonpool

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2865319A (en) * 1954-10-07 1958-12-23 Internat Macgregor Organizatio Hatch-covers arrangements
WO2012146622A1 (en) * 2011-04-26 2012-11-01 Ihc Holland Ie B.V. Vessel comprising a moon pool and a hoisting arrangement and method of lowering items into the sea
GB2526134A (en) * 2014-05-15 2015-11-18 Technip France Moonpool

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112407186A (en) * 2020-11-23 2021-02-26 江南造船(集团)有限责任公司 Moon pool system installation method
CN112407186B (en) * 2020-11-23 2021-12-07 江南造船(集团)有限责任公司 Moon pool system installation method

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