GB2486189A - Dynamically stabilised marine transfer platform - Google Patents
Dynamically stabilised marine transfer platform Download PDFInfo
- Publication number
- GB2486189A GB2486189A GB1020553.2A GB201020553A GB2486189A GB 2486189 A GB2486189 A GB 2486189A GB 201020553 A GB201020553 A GB 201020553A GB 2486189 A GB2486189 A GB 2486189A
- Authority
- GB
- United Kingdom
- Prior art keywords
- creachts
- booms
- platform
- work
- stabilised
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000033001 locomotion Effects 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 3
- 238000009434 installation Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 2
- 230000006641 stabilisation Effects 0.000 claims description 2
- 238000011105 stabilization Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000007689 inspection Methods 0.000 abstract description 2
- 230000002411 adverse Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004297 night vision Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
- B63B27/30—Arrangement of ship-based loading or unloading equipment for transfer at sea between ships or between ships and off-shore structures
-
- 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
- B63B27/14—Arrangement of ship-based loading or unloading equipment for cargo or passengers of ramps, gangways or outboard ladders ; Pilot lifts
- B63B27/143—Ramps
-
- 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
- B63B43/00—Improving safety of vessels, e.g. damage control, not otherwise provided for
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The Sea Reach Transfer System (CReachTS) provides a dynamically stabilised marine transfer platform and is used for safe transfer of personnel and material from a work boat, on which the transfer system is mounted, to offshore structures. The system comprises a work platform 4 mounted at the end of a pair of telescopically extendable booms 2 and 3. These booms are in turn mounted on a rotatable base structure 1. The elevation of the extendable booms is controlled by a pair of hydraulic jacks 5 and 6. The system uses motion sensors to allow for heave, pitch, roll and yaw of the work boat, in use, to maintain the platform in a stationary position with respect to the offshore structure. The system may also be used for inspection, survey, repair and maintenance of offshore structures from a work boat at sea.
Description
Sea Reach Transfer System The sea reach transfer system (abbreviated as CReachTS) is an innovative hydraulic lift system for sea craft to stabilise large motion at sea to provide a stationary interface with reference to an offshore structure for safe transfer of men and materials, or to carry out work procedures such as inspection, survey, repair and maintenance of offshore structures from the dynamically stabilised Access for work to offshore structures such as offshore wind power generation turbines, offshore oil & gas platform and other structures, is restricted in rough sea conditions due to excessive wave induced motions of sea craft/workboat. It is an acute problem for offshore wind farms resulting in considerable loss of production as essential repair and maintenance services cannot be carried timely on turbines during rough seas because of accessibility problem.
Apart from access at sea level, it mostly requires to reach higher on offshore structure for working. And climbing heights with tools and equipment is hazardous and require extensive effort adversely effecting overall performance and efficiency.
The offshore structures requiring access may be fixed to sea bed using appropriate foundation or may be floating. In case, the offshore structure is floating, it may also have wave induced motion and stationary access/transfer interface shall accordingly require to compensate for such relative motions as well in addition to motion compensation for the vessel on which the system is installed.
The invention CReachTS provide a solution to those problems as explained using the following figures related to the system: Figure 1: Shows CReachTS in extended position with main component marked.
Figure 2: Shows typical installation to a sea craft, the CReachTS is in retracted position.
Figure 3: Shows typical installation to a sea craft, the CReachTS in extended/active position As shown in figure 1, the system consists of a rotate-able base structure 1 which supports the two telescopic hydraulic boom 2 and 3. The stabilised work-platform 4 to provide stationary interface to the offshore structure is attached at the booms head using booms head assembly 5. The boom head assembly 5 carry requisite motion sensors and mechanism to provide small motion compensation with reference to the offshore platform to be accessed. The large motion compensations are obtained as follows: * The compensation in heave, pitch and surge is obtained along with vertical reach of the stabilized work-platform 4 by extension of the telescopic booms 2 and 3 and by adjusting elevation angle using hydraulic jack 6 and 7. The innovative concept of combining vertical reach and motion compensation in heave, pitch and surge together, allows for large motion compensate typical of high sea states.
* The roll motion compensation of the sea craft for stabilised work-platform 4 is achieved by differential elevation of the telescopic booms 1 and 2 using hydraulic jack 6 and 7.
* The yaw motion compensation of the sea craft for stabilised work-platform 4 is achieved by rotation at the base 1 and differential extension of telescopic booms 2 and 3, and elevation using hydraulic jack 6 and 7.
* The sway motion compensation of the sea craft for stabilised work-platform 4 is achieved by rotation at the base 1 and differential extension of telescopic booms 2 and 3, and elevation using hydraulic jack 6 and 7 along with lateral motion compensation at booms head assembly 5.
The boom head assembly 5 may be provided with infra-red and night vision sensors to ensure availability of the system for operation in fog and dark conditions.
The figure 2 shows a typical installation of the CReachTS on board a SWATH (Small Water Plane Area Twin Hull) craft. The CReachTS is in retracted position while not in use during transits.
This configuration during transits provide the following benefits: * Lower wind cross-section i.e. lower wind drag improving fuel consumption as well as stability of the sea craft.
* Lower centre of gravity of the CReachTS, improving stability of the craft.
The figure 3 shows the CReachTS system in deployed mode.
The innovative concept of providing combined vertical lift and large motion compensation on two hydraulically controlled telescopic booms along with stabilisation of boom head work-platform using booms head assembly results in an efficient system to provide stationary interface from sea craft to offshore structure even in adverse sea conditions.
Claims (11)
- Claims 1. The CReach Transfer System (CReachTS) for installation on a sea craft shall provide motion stabilised stationary work-platform interface at a height above the craft for safe transfer of men and material to offshore structures and/or to carry out any other work procedures from the dynamically stabilised work-platform.
- 2. The CReachTS according to claim 1, in which the two telescopic hydraulic booms capable of extension/retraction, independent of each other, using hydraulic control system, are installed on a base structure.
- 3. The CReachTS according to claim 1, in which the base structure supporting two telescopic booms can rotate around a vertical axis at the centre of the structure using an appropriate control system.
- 4. The CReachTS according to claim 1, in which the two telescopic hydraulic booms may change angle of elevation, independent of each other, using hydraulic jack controlled by a hydraulic control system.
- 5. The CReachTS according to claim 1, in which the stabilised work-platform provide stationary interface to offshore structure is attached using booms head assembly.
- 6. The CReachTS according to claim 1, in which the loads carried on the stabilised work-platform at the booms head may be balanced by using counter weights or hydraulic balancing.
- 7. The CReachTS according to claim 1, in which the booms head assembly is capable to provide precise rapid compensation in small range of motions.
- 8. The CReachTS according to claim 1, in which the booms head assembly is fitted with requisite sensors for providing control and compensation in prevailing conditions including fog and dark.
- 9. The CReachTS according to claim 1, in which the sensors and control units are installed for sensing of motion of the sea craft on which the system is installed, and effect the motion of relevant components providing desired motion compensation for the booms head work-platform stabilization.
- 10. The CReachTS according to claim 1, in which the heave, surge, sway, roll, pitch and yaw motions of the sea craft are compensated in combination with desired vertical reach of stabilised boom head work-platform using the combination of telescopic booms extension and elevation angle, and rotation at the base structure.
- 11. The CReachTS according to claim 1, in which the relative motion of the offshore platform are compensated using the booms head assembly and motion compensation system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1020553.2A GB2486189A (en) | 2010-12-06 | 2010-12-06 | Dynamically stabilised marine transfer platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1020553.2A GB2486189A (en) | 2010-12-06 | 2010-12-06 | Dynamically stabilised marine transfer platform |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201020553D0 GB201020553D0 (en) | 2011-01-19 |
| GB2486189A true GB2486189A (en) | 2012-06-13 |
Family
ID=43531456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1020553.2A Withdrawn GB2486189A (en) | 2010-12-06 | 2010-12-06 | Dynamically stabilised marine transfer platform |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2486189A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5591488A (en) * | 1978-12-30 | 1980-07-11 | Mitsui Eng & Shipbuild Co Ltd | Man-transferring system between marine construction |
| WO1982001729A1 (en) * | 1980-11-12 | 1982-05-27 | Mahlon N Zimmerman | Automatic safety gangplank |
| GB2336828A (en) * | 1998-04-28 | 1999-11-03 | Oceantech Plc | Stabilised ship-borne support arm |
| NL1027103C2 (en) * | 2004-09-24 | 2006-03-27 | Univ Delft Tech | Vessel is for transfer of persons or goods to an offshore construction and has an upper deck with a platform regulatable as to its position |
| WO2007120039A1 (en) * | 2006-03-01 | 2007-10-25 | Technische Universiteit Delft | Vessel, motion platform, method for compensating motions of a vessel and use of a stewart platform |
| GB2440520A (en) * | 2006-08-03 | 2008-02-06 | Liam Clear | Motion Compensated Aircraft Platform |
| WO2009132814A1 (en) * | 2008-04-28 | 2009-11-05 | Stefan Leske | Device for the safe transfer of personnel or material from an object configured as a boat to an object moving relative thereto, and boat comprising the device |
-
2010
- 2010-12-06 GB GB1020553.2A patent/GB2486189A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5591488A (en) * | 1978-12-30 | 1980-07-11 | Mitsui Eng & Shipbuild Co Ltd | Man-transferring system between marine construction |
| WO1982001729A1 (en) * | 1980-11-12 | 1982-05-27 | Mahlon N Zimmerman | Automatic safety gangplank |
| GB2336828A (en) * | 1998-04-28 | 1999-11-03 | Oceantech Plc | Stabilised ship-borne support arm |
| NL1027103C2 (en) * | 2004-09-24 | 2006-03-27 | Univ Delft Tech | Vessel is for transfer of persons or goods to an offshore construction and has an upper deck with a platform regulatable as to its position |
| WO2007120039A1 (en) * | 2006-03-01 | 2007-10-25 | Technische Universiteit Delft | Vessel, motion platform, method for compensating motions of a vessel and use of a stewart platform |
| GB2440520A (en) * | 2006-08-03 | 2008-02-06 | Liam Clear | Motion Compensated Aircraft Platform |
| WO2009132814A1 (en) * | 2008-04-28 | 2009-11-05 | Stefan Leske | Device for the safe transfer of personnel or material from an object configured as a boat to an object moving relative thereto, and boat comprising the device |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201020553D0 (en) | 2011-01-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |