GB2275230A - A design for oil production vessels - Google Patents
A design for oil production vessels Download PDFInfo
- Publication number
- GB2275230A GB2275230A GB9303391A GB9303391A GB2275230A GB 2275230 A GB2275230 A GB 2275230A GB 9303391 A GB9303391 A GB 9303391A GB 9303391 A GB9303391 A GB 9303391A GB 2275230 A GB2275230 A GB 2275230A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vessel
- oil production
- turret
- barge
- hull
- 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.)
- Granted
Links
Classifications
-
- 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
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
- B63B21/507—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers with mooring turrets
-
- 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
- B63B3/02—Hulls assembled from prefabricated sub-units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
Abstract
In an oil production vessel comprising a hull 40 moored by an internal turret 11 so that it may weathervane, the portion of the vessel forward of the turret contains all the areas which may normally have personnel present without external protective clothing being necessary, whereas all systems (including storage tanks) containing hydrocarbons are disposed in, or aft, or behind the turret. The vessel comprises a plurality of functional block 1 - 39. The design and arrangement of the functional blocks is such that they act as a structural part of the hull and provide support and separation for other functional blocks in such a way as to reduce the interfaces between the systems required to produce oil safely, economically and with minimum environmental risks. <IMAGE>
Description
A DESIGN FOR OIL PRODUCTION SHIPS
This invention relates to a vessel, ship or barge, hereinafter generically called a "vessel", and to the design of such a vessel, the vessel being for economically exploiting oil fields in the marine environment and incorporating all the facilities to connect to subsea oil wells, control, process, store and later off-load the produced oil and vent or flare or pipe away the hydrocarbon gasses, all in a safe manner which meets the relevant national and international regulations.
The building of new floating production vessels, incorporating oil storage, is becoming an increasingly important option for exploiting offshore oil fields.
However, it has been difficult to identify a hull configuration which will work economically over a range of different oil field developments. An additional specific problem for the oil field operator is that he cannot easily vary the specification of the hull and systems after some parts of the vessel detailed design and construction has started, typically 18 to 24 months before first oil is produced. The changing regulatory requirements in different countries can also make existing designs quickly obsolete for many future applications. Furthermore, after the oil field has been depleted, which will usually be a period less than the life of the vessel, it will be difficult to modify a field-specific design for use on future oil fields.
According to the present invention a design method using a unique arrangement of functional blocks is provided for a range of hull sizes that offers variability of the main specification features without the need for a specific size of hull, mooring design or riser system at the initial development stages of a particular oil field. These features are incorporated in a design that offers oil storage configurations to meet all present, and anticipated, safety and pollution requirements. The invention also provides for new and novel functional blocks that will improve the design of floating production vessels in meeting national and international safety and pollution requirements.
According to the invention in one aspect there is provided a vessel comprising a hull moored by an internal turret which is forward of the centre of environmental forces near the amidships, so that the vessel may weathervane, the portion of the vessel forward of the turret containing all the enclosed and mechanically ventilated areas, which have personnel present without protective clothing being necessary, to operate the vessel in the same manner as a ship, all the systems containing hydrocarbons and hazardous area being placed in, or aft, or behind the turret.
Such an arrangement is advantageous for a number of reasons including the fact that areas that are normally occupied by crew are always upwind of the dangerous processing and storage areas, both in the event of a fire and during normal operation.
A specific embodiment of the invention will now be described, by way of example, with the accompanying drawings, in which:
Figure 1 shows a plan view of the vessel;
Figure 2 shows an upright section of the vessel taken
along the line 2-2 of Figure 1;
Figures 3 to 6 are upright sections taken respectively
along the lines 3-3, 4-4, 5-5 and 6-6 of Figure 1;
Figure 7 is a section taken along the line 7-7 of
Figure 2; and
Figure 8 is a perspective view of the completed
vessel.
Referring to the drawings, the vessel comprises a hull 40 which provides the flotation and stability to support all the functional blocks 1 to 39 inclusive. These functional blocks are the primary subdivision, by function, of the systems required to exploit economically, oilfields in the marine environment. These functional blocks incorporate all the facilities to connect to subsea oil wells, control, process, store and later off-load the produced oil and vent or flare or pipe away the hydrocarbon gasses all in a safe manner which meets the relevant national and international regulations.
The functional blocks 1 to 39 are given in the following list with the names commonly used on the Marine Industry, and or, the Offshore Oil Industry. The marine convention of Forward / Aft and Port / Starboard has been used, but this should be considered to be the same Front / Back and
Left / Right. The description is also to cover the case where Port can be substituted for Starboard and Starboard for Port, to produce mirror images of the arrangement(s).
1. Helicopter Facilities 2. Forward Marine Equipment 3. Forward or Peak ballast tank 4. Bridge or Pilot House 5. Hotel Services or Accommodation Block 6. Evacuation Muster Station or Safe Refuge 7. Operational Control Centre 8. Utilities Support Unit or Engine Room 9. Fuel Storage 10. Turret Housing and Forward Cofferdam 11. Mooring Turret 12. Mooring Lines or Catenary Mooring 13. Risers or Flowlines 14. Riser Termination 15. Emergency Shut Down Valves 16. Swivel Assembly or High Pressure Fluid Transfer
unit(s) 17. Well Fluid Pressure Control or Choke Valves (note this
may be optionally placed before or after item 15.) 18. Starboard side protected access route 19.Port side unprotected access route which may be
continuous during construction, at times when the
process plant is not in operation or in emergency
situations, but will be sectioned off by doors at the
structural barriers during normal operation 20. Process Deck 21. Main Deck Sandwich Structure which will be continuous
during construction, and may have continuous access at
times when the process plant is not in operation or in
emergency situations, but will be sectioned off by
doors at the structural barriers during normal
operation 22. Port Wing Ballast and Trim Tanks 23. Starboard Wing Ballast and Trim Tanks 24. Tanks for products, oil cargo, slops or ballast where
the tanks are formed by internal horizontal or
vertical barriers to a number required to ensure
stability and to minimize pollution in case of damage
to one or more tanks, 25. Aft Cofferdam 26.Starboard Thruster System 27. Pump Room containing the pumps and valves necessary to
fill, empty and control the amount of fluids in the
tanks, and which function may be supplemented by pumps
contained in some of the tanks.
28. Port Thruster System 29. Gas and Oil Flare(s) and Gas Venting System(s) 30. Shuttle Tanker Mooring System 31. Aft Marine Equipment 32. Crude Oil Offloading System 33. Aft Trim and Ballast Tank 34. Aft Lifesaving Apparatus 35. Forward Starboard Lifesaving Apparatus 36. Forward Port Lifesaving Apparatus 37. Forward Port Cranage 38. Central Starboard Cranage which may be provided by one
or more cranes or gantries 39. Aft Port Cranage
The interface structure between the functional blocks is so arranged to provide the strength necessary to stiffen the hull so that it may resist the environmental forces, support the functional blocks themselves and provide a barrier between the functional blocks. Thus each block is itself designed to be self supporting and complete both as to its operation and design, apart that is for necessary connections to other blocks and to utilities.
The arrangement of the functional blocks is in such a unique way as to minimise the number of interfaces between the functional blocks that need to be penetrated by pipes, cables and operating personnel, necessary to operate the vessel.
The functional blocks are defined by the following set of rules: - Blocks are single structural entities inside the
boundaries of the block.
- The block may share structural support with adjacent
blocks.
- The structural support between blocks generally forms
a barrier and some functional blocks form the barrier
between other functional blocks.
Barriers can be any one or combination of:
- Gas tight
- Watertight
- Flame resistant
- Pressure resistant
- Blast resistant - Blocks containing active Hydrocarbons are separated
from other working (areas which have or may have
personnel present) blocks by an impervious barrier or
a non active space contained between barriers - Non active blocks have one dimension between other
active blocks which is at least the minimum dimension
required to meet national and international
requirements on the separation of Hazardous Areas.
These non active blocks define, but do not necessarily
totally enclose, a area or volume that is either:
- Completely enclosed and ventilated in such a way
as to ensure a non explosive gas mixture is
present
- Completely enclosed and to be filled and emptied
with water in a controlled manner, such that no
explosive gas mixture may enter when the water is
emptied
- Not enclosed on at least two boundaries such that
the ventilation is by the free movement of fresh
air
Each of these primary functional blocks may be described, specified, designed, engineered in detail and constructed within pre-defined structural boundaries which will form the necessary boundaries between the functions to meet the regulations and requirements for operating the vessel.
The invention therefore also extends to a method of designing a vessel according to these criteria and also to building a vessel according to that design and these criteria.
The invention further extends to a unique type of primary functional block shown as 21, the Main Deck Sandwich
Structure. This block is a type of vessel deck which is designed to give structural strength, and act as a barrier as defined by national and international regulations between the hydrocarbon processing equipment and the stored oil. The top and bottom of the sandwich are steel boundaries with the internal space being freely ventilated from the sides as can be seen very clearly from Figure 8.
Internal girders provide the stiffening strength to enable the deck to span the cargo and ballast tanks and support the process plant above, as well as contributing to the longitudinal strength of the hull.
Therefore the invention in a further aspect comprises a vessel for storing and processing oil having a deck which provides structural strength and acts as a barrier between an oil storage area and an oil processing area positioned at least partially above the oil storage area, the deck comprising a sandwich made up of continuous metal sheeting held apart by girders which provide the stiffening strength to enable the deck to span the oil storage area and support the oil processing area, the girders having openings and at least the two opposed side edges of the deck being open to the atmosphere so that the deck is freely ventilated.
The invention also incorporates a specific arrangement of the six primary functional blocks 1, 5, 6, 7, 35 and 36 to meet the United Kingdom regulations on the evacuation of oil installations developed after the Lord Cullen report on the Piper Alpha disaster enquiry. The specific arrangement allows that the primary normally manned areas 5 and 7 are connected and also directly interfaced: - with 6 which is directly interfaced with the
lifesaving equipment 35 and 36 and - with 1, which is achieved by having vertical access in
both 5 and 7 up to 1.
By following the design method according to the invention one can achieve a number of advantages: 1 A design method using a unique arrangement of
functional blocks is provided for a range of hull
sizes that offers variability of the main
specification features without the need for a specific
size of hull, mooring design or riser system at the
initial development stages of a particular oil field.
These features are incorporated in a design that
offers oil storage configurations to meet all present,
and anticipated, safety and pollution requirements.
The invention also provides for new and novel
functional blocks that will improve the design of
floating production vessels in meeting national and
international safety and pollution requirements.
2 The total system is subdivided into a number of single
primary functional blocks and the arrangement of these
blocks is in such a way that there are no divided
primary functions.
3 Each of these primary functional blocks may be
described, specified, designed, engineered in detail
and constructed within pre-defined structural
boundaries which will form the necessary boundaries
between the functions to meet the regulations and
requirements for operating the vessel.
4 The secondary functional connections between blocks
can be categorised as a series of interface
requirements.
5 The design incorporates a unique type of primary
functional block the Main Deck Sandwich Structure 21.
This block is a new type of vessel deck which is
designed to give structural strength, and act as a
barrier as defined by national and international
regulations between the hydrocarbon processing
equipment and the stored oil. The top and bottom of
the sandwich can be steel boundaries with the internal
space being freely ventilated from the sides.
Internal girders provide the stiffening strength to
enable the deck to span the cargo and ballast tanks
and support the process plant above.
6 The specific arrangement of the six primary functional
blocks 1, 5, 6, 7, 35 and 36 allows that the primary
normally manned areas 5 and 7 be interfaced and also
directly interfaced:
- with 6 which is directly interfaced with the
lifesaving equipment 35 and 36 and
- with 1, which is achieved by having vertical
access in both 5 and 7 up to 1.
7 As previous oil production ships and proposed designs
have had the primary functions split over more than
one structural boundary, advantages of the design
invention are:
- The simplification of the interface between
blocks, which is a major part of the initial
design of any such floating production system
- The functional blocks separate the different
marine and offshore regulatory areas so the
conflicting requirements between regulatory
requirements are minimised
- The ability to have functional blocks specified,
designed and even constructed before other blocks
are at the same stage of development, so that the
blocks with the longest total construction time
can be identified and started before other
blocks, e.g. one would probably have to complete
the design of and start constructing the
accomodation block before a decision on the
number of oil tanks and ultimately the length of
the vessel is made
- The arrangement of the blocks enables the system
to be put together and connected up with cables and piping which accesses each block by passing through the minimum number of boundaries The arrangement of the blocks enables the system to be operated and accessed by personnel by passing through the minimum number of boundaries because of the access ways 18 and the close positioning of the blocks 5 and 7 The arrangement of the normally manned blocks 5 and 7 provides for the minimum distance to the methods of evacuating the vessel 1, 35 and 36 via the muster station 6 The main variables of Storage Volume, Process
Plant Area and Accommodation Requirement can be varied in the initial stages of the building (up to 6-9 months before delivery).
The Design allows any Safety Case requirements to be fully analyzed before commitment to finalising any of the main parameters. This is very important since the obtaining of Government approval for one block need not delay the detailed design and building of other blocks For most applications (excluding arctic requirements), the Classification of the vessel need not be decided before the storage requirement has been confirmed (up to 9-12 months before delivery.
The hull/turret configuration incorporates all requirements for a worldwide mooring location, including disconnectable systems in Typhoon areas.
The subsea interface has been addressed by incorporating three options for the turret assembly: - up to 6 riser bundles without work-over; - up to 10 riser bundles and work-over; - up to 6 risers and disconnectable without workover.
The hull can be modified and extended for future developments. Thus even after the vessel has been in use for several years it may be desirable and it is possible to modify the oil storage and/or oil processing blocks to suit the requirements of a different field, whilst still retaining the block forward of the turret unchanged.
The turret functional block allows a completely different subsea interface requirement to be met by exchanging the turret assembly.
Claims (5)
1 An oil production ship, vessel or barge comprising a hull moored by an internal turret which is forward of the centre of environmental forces near the amidships, so that the vessel may weathervane, the portion of the vessel forward of the turret containing all the enclosed and mechanically ventilated areas, which have personnel present without protective clothing being necessary, to operate the vessel in the same manner as a ship, all the systems containing hydrocarbons and hazardous areas being placed in, or aft, or behind the turret.
2 An oil production ship, vessel or barge as claimed in
Claim 1, in which each of the primary functional blocks may be described, specified, designed, engineered and constructed within pre-defined structural boundaries which will form the necessary boundaries between the functions to meet the regulations and requirements for operating the vessel.
3 An oil production ship, vessel or barge as claimed in
Claim 1 or Claim 2, in which the top and bottom of the main deck sandwich structure (21), are steel boundaries with the internal space being freely ventilated from the sides.
Internal girders provide the stiffening strength to enable the deck to span the cargo and ballast tanks, and support the process plant above, as well as contributing to the longitudinal strength of the hull.
4 An oil production ship, vessel or barge as claimed in
Claim 1 or Claim 2 in which the Helicopter Facilities (1),
Hotel Services or Accommodation Block (5), Evacuation Muster
Station or Safe Refuge (6), Operational Control Centre (7),
Forward Starboard Lifesaving Apparatus (35) and forward Port
Lifesaving Apparatus (36) shown in Figures 1-7 are arranged such that (5) and (7) are directly interfaced, and also directly interfaced: - with (6), which is directly interfaced with (35) and
(36).
- with (1), which is achieved by having vertical access
in both (5) and (7) up to (1).
5 An oil production ship, vessel or barge substantially as described herein with reference to Figures 1-8 of the accompanying drawings.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9303391A GB2275230B (en) | 1993-02-19 | 1993-02-19 | An oil production ship, vessel or barge |
GB9613780A GB2300605B (en) | 1993-02-19 | 1993-02-19 | An oil production ship, vessel or barge |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9303391A GB2275230B (en) | 1993-02-19 | 1993-02-19 | An oil production ship, vessel or barge |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9303391D0 GB9303391D0 (en) | 1993-04-07 |
GB2275230A true GB2275230A (en) | 1994-08-24 |
GB2275230B GB2275230B (en) | 1997-06-04 |
Family
ID=10730730
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9303391A Expired - Fee Related GB2275230B (en) | 1993-02-19 | 1993-02-19 | An oil production ship, vessel or barge |
GB9613780A Expired - Fee Related GB2300605B (en) | 1993-02-19 | 1993-02-19 | An oil production ship, vessel or barge |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9613780A Expired - Fee Related GB2300605B (en) | 1993-02-19 | 1993-02-19 | An oil production ship, vessel or barge |
Country Status (1)
Country | Link |
---|---|
GB (2) | GB2275230B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5749758A (en) * | 1994-02-02 | 1998-05-12 | Den Norske Stats Oljeselskap A.S., I & K Patent | Vessel for production and/or loading/unloading and transport of hydrocarbons from offshore fields, and/or for carrying out well operations |
WO1999061308A1 (en) * | 1998-05-27 | 1999-12-02 | Toermaelae Pasi | Evacuation refuge |
WO2005082704A1 (en) * | 2004-02-26 | 2005-09-09 | Single Buoy Moorings Inc. | Floating building |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO308128B1 (en) * | 1997-03-14 | 2000-07-31 | Hitec Systems As | Arrangement for vessels for production / test production of oil / gas from fields below sea level |
US6715436B2 (en) | 1998-09-24 | 2004-04-06 | Stolt Offshore Limited | Sea-going vessel and hull for sea-going vessel |
GB9822975D0 (en) * | 1998-10-21 | 1998-12-16 | Kvaerner Oil & Gas Ltd | Gas disposal system |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB799556A (en) * | 1956-01-19 | 1958-08-13 | Uno Staffansson | Improvements in or relating to ships |
GB981016A (en) * | 1963-01-09 | 1965-01-20 | Phs Van Ommeren N V | Improvements in or relating to tankers |
WO1985003048A1 (en) * | 1984-01-03 | 1985-07-18 | Hermann Wuttudal | Turret for mooring vlcc size vessels |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL6713009A (en) * | 1967-09-08 | 1969-03-11 | ||
US3835800A (en) * | 1968-02-13 | 1974-09-17 | Santa Fe Drilling Co | Twin hull semi-submersible derrick barge |
-
1993
- 1993-02-19 GB GB9303391A patent/GB2275230B/en not_active Expired - Fee Related
- 1993-02-19 GB GB9613780A patent/GB2300605B/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB799556A (en) * | 1956-01-19 | 1958-08-13 | Uno Staffansson | Improvements in or relating to ships |
GB981016A (en) * | 1963-01-09 | 1965-01-20 | Phs Van Ommeren N V | Improvements in or relating to tankers |
WO1985003048A1 (en) * | 1984-01-03 | 1985-07-18 | Hermann Wuttudal | Turret for mooring vlcc size vessels |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5749758A (en) * | 1994-02-02 | 1998-05-12 | Den Norske Stats Oljeselskap A.S., I & K Patent | Vessel for production and/or loading/unloading and transport of hydrocarbons from offshore fields, and/or for carrying out well operations |
WO1999061308A1 (en) * | 1998-05-27 | 1999-12-02 | Toermaelae Pasi | Evacuation refuge |
GB2353767A (en) * | 1998-05-27 | 2001-03-07 | Pasi Toermaelae | Evacuation refuge |
GB2353767B (en) * | 1998-05-27 | 2002-04-03 | Pasi Toermaelae | Evacuation refuge |
US6510808B1 (en) | 1998-05-27 | 2003-01-28 | Tormaalaa Pasi | Evacuation refuge |
WO2005082704A1 (en) * | 2004-02-26 | 2005-09-09 | Single Buoy Moorings Inc. | Floating building |
Also Published As
Publication number | Publication date |
---|---|
GB9303391D0 (en) | 1993-04-07 |
GB2300605A (en) | 1996-11-13 |
GB9613780D0 (en) | 1996-09-04 |
GB2275230B (en) | 1997-06-04 |
GB2300605B (en) | 1997-06-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR102163594B1 (en) | Ship | |
EP3254948B1 (en) | Hydrocarbon processing vessel and method | |
US6336419B1 (en) | Floating structure | |
JP5180897B2 (en) | Liquefied gas carrier | |
AU700992B2 (en) | Tanker reconstruction | |
DK3038896T3 (en) | Liquid structure for crude oil drilling | |
GB2549079A (en) | Apparatus and method | |
GB2275230A (en) | A design for oil production vessels | |
Moan et al. | Risk assessment of FPSOs with emphasis on collision | |
US5901656A (en) | Watercraft with stacked wing ballast tanks | |
CN205273808U (en) | Floating well drilling production oil storage device pump cabin structure | |
KR100802584B1 (en) | Ship having heavy fuel oil storing tank on upper deck | |
US5101750A (en) | Tanker ship hull for reducing cargo spillage | |
Wang | A brief review of marine and offshore safety assessment | |
KR20120003757U (en) | Floating marine structure having escape way from turret moonpool | |
WO1997031817A1 (en) | Semi-submersible vessels | |
RU2303553C1 (en) | Tanker | |
US7267072B2 (en) | Dry cargo submarine with air-charge cargo hold | |
CN216153988U (en) | Floating oil storage ship with independently communicated cabins | |
Tronstad | The use of risk analysis in design: safety aspects related to the design and operation of a FPSO | |
NO345160B1 (en) | A floating production unit | |
WO1994018066A1 (en) | Tanker | |
Vinnem et al. | Applicability of Risk Assessment to Shipping | |
CN118107721A (en) | Transport ship | |
MacGregor et al. | Developments in Monohull Production Vessels for North Sea and Atlantic Applications |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19990219 |