WO1999044883A1 - Navire de surface - Google Patents

Navire de surface Download PDF

Info

Publication number
WO1999044883A1
WO1999044883A1 PCT/NO1998/000069 NO9800069W WO9944883A1 WO 1999044883 A1 WO1999044883 A1 WO 1999044883A1 NO 9800069 W NO9800069 W NO 9800069W WO 9944883 A1 WO9944883 A1 WO 9944883A1
Authority
WO
WIPO (PCT)
Prior art keywords
vessel
bow
well
rotating part
turret
Prior art date
Application number
PCT/NO1998/000069
Other languages
English (en)
Inventor
Leiv Wanvik
Hans Bjørn LIE
Original Assignee
Kværner Oil & Gas A.S
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 Kværner Oil & Gas A.S filed Critical Kværner Oil & Gas A.S
Priority to PCT/NO1998/000069 priority Critical patent/WO1999044883A1/fr
Priority to AU73516/98A priority patent/AU7351698A/en
Publication of WO1999044883A1 publication Critical patent/WO1999044883A1/fr

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 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/04—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with single hull
    • B63B1/06—Shape of fore part
    • 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
    • B63B35/4413—Floating drilling platforms, e.g. carrying water-oil separating devices

Definitions

  • the invention relates to a surface vessel for exploiting natural resources below the seabed, which vessel includes a geostationary moorable rotating part which is pivotally supported about a vertical axis in a vertical aperture or well in the vessel and dynamic positioning means for holding the vessel in a desired directional orientation, and which has equipment for establishing a rigid, heave-compensated string connection between the rotating part of the vessel and the seabed, in particular a drill string.
  • floaters Hydrocarbon recovery from floating structures
  • Such floaters may be in the form of ships or semi-submersible units.
  • the first known floaters were barges which were moored by a plurality of anchors to the seabed from where drilling operations were conducted. Gradually, as deeper waters were explored, equipment was developed making it possible to drill despite the motions of the vessel. In areas of the world with harsher climates, it is in practice virtually impossible to lie at anchor with a fixed directional orientation, because wind and current at times straight from the side produce forces which far exceed the capacity of the mooring, not to mention the problems due to the rolling of the vessel.
  • One of the objects of the invention is to achieve greater regularity for operations requiring a rigid string connection, heave compensated in the longitudinal direction, between the turret and the seabed, in particular drilling operations.
  • the vessel can be operated in two operational modes.
  • the ship Owing to the turret location, the ship will be directionally unstable, but the directional orientation is maintained with the aid of a dynamic positioning system. If the weather conditions exceed a given limit, the drilling operation can be temporarily interrupted and the ship switched to a stormy weather mode where the turret will be in front of Lpp/2, thereby obtaining greater directional stability.
  • a surface vessel for exploiting natural resources under the seabed, which vessel includes a geostationary moorable rotating part which is pivotally supported about a vertical axis in a vertical aperture or well in the vessel, and dynamic positioning means for holding the vessel in a desired directional orientation, and which has equipment for establishing a rigid, heave compensated string connection between the vessel's rotating part and the seabed, in particular a drill string, which surface vessel is characterised in that the vessel has a bow structure at both ends, and that the well and rotating part are positioned eccentrically relative to the longitudinal centre of the vessel.
  • the invention Based on the ship size that is used today as production ships (100000 dwt and over), the invention initially provides a basis for drilling which far outclasses the drill ships that have been used earlier. Pure drill ships of this size have not been of interest earlier, since the costs of a large hull and the turret arrangement would go far towards giving excessively high costs. However, the invention makes possible the use of such large production ships also as combined production and drill ships.
  • the surface vessel according to the invention is designed to have a fair weather mode and a storm mode. This is achieved in that the bow closest to the well or turret is designed as a storm bow.
  • the living quarters on the vessel are located in the bow area which is furthest from the well/rotating part. Such location of the living quarters is favourable for several reasons.
  • the living quarters will be well in front of (upwind of) the turret or the drilling. If, as a result of an accident, there is burning oil on the sea surface, it will be relatively easy to turn the vessel in such direction as to ensure that life boats which are launched do not drift straight into the burning oil on the sea surface.
  • the vessel In extreme weather, the vessel will be switched to the storm mode or extreme weather mode. The said location of the living quarters will then be optimal with respect to comfort and the possibility of launching life boats in storm conditions. It is especially advantageous if the bow which is furthest from the well/rotating part is designed as a submersed bulbous bow. When the vessel is in operation, a special bow design of this type will give a reduced pitch motion.
  • the vessel has azimuth thrusters in both bow areas.
  • the surface vessel according to the invention has a second through-going aperture or well in the vessel.
  • This well can then be used as a service well, i.e., that service operations can be carried out on the seabed through the well, for example, in connection with positioning or parking safety valves, wellhead Christmas trees etc., without there being any need to clear the turret or moonpool of equipment for drilling (e.g., several hundred metres of riser), which takes place through the rotating part.
  • a service well of this kind will also be favourable in connection with any work or operations in connection with the production which is to take place parallel with the drilling through cable risers which run from the seabed up to the vessel via the rotating part.
  • the use of the service well may be hindered to a certain extent by mooring lines and/or flexible risers, as the ship must maintain the same direction whilst the operation takes place.
  • Fig. 1 is a schematic sectional elevation of a surface vessel according to the invention
  • Fig. 2 shows a second possible surface vessel according to the invention, in schematic sectional elevation
  • Fig. 3 shows a vessel as in Fig. 2;
  • Fig. 4 is a plan view of a vessel as in Fig. 2.
  • Fig. 1 shows a vessel 1 which carries a process plant 2 and a drilling package 3.
  • the vessel 1 is anchored to the seabed 4 by mooring lines 5.
  • the mooring arrangement is attached to a turret 6 which is located in the vessel 1, in a vertical aperture or well 7.
  • the drilling package 3 is placed on the turret 6 or straddling it.
  • Flexible risers 8 pass from the seabed 4 up to the vessel 1. Through these flexible risers oil and gas can be passed from the seabed to the vessel through the turret 6 and a system not shown in any detail which transfers the oil and/or gas from the turret 6 to the vessel's 1 deck.
  • Such transfer systems may include swivels or so-called drag chains and involve what in the eyes of the skilled artisan is prior art.
  • a so-called moonpool through which drilling operations can be carried out with drilling package 3.
  • a drill string with surrounding risers is indicated by means of the reference numeral 10.
  • the vessel 1 has a bow structure 11 at one end and a bow structure 12 at the other end.
  • the turret is located closer to the bow 12 than to the bow 11.
  • the bow 12 is designed as a storm bow, i.e., a bow which is proportioned for extreme storm conditions (usually 100 year storm conditions).
  • the bow 11 is designed as a submerged bow which gives reduced pitch motions.
  • the vessel 1 has living quarters 13 in proximity to the bow 11.
  • the process plant 2 has a flare tower 14 at a good distance from the living quarters.
  • the main power plant 15 (for process) is also located close to the bow 12.
  • the turret 6, including mooring lines 5, drilling package 3 and the risers 8, is to be understood as geostationary in normal operation.
  • the drilling package may also be supported by the ship's deck and only operate through the turret.
  • the vessel 1 is equipped with automatic propeller systems 16 which in combination with the mooring arrangement, i.e., the mooring lines 5, will be capable of holding the vessel 1 into the wind and weather.
  • the vessel 1 can be operated in two modes.
  • the dynamic positioning means 16 are proportioned to hold the bow 11 into the wind until a specified state of the sea, whereafter the choice can be made in a controlled manner to turn the ship 180° so that the bow 12 comes into the wind. With the storm bow 12 facing into the wind and weather, the vessel will be designed for extreme storm conditions (100 year storm conditions).
  • Fig. 2 shows a vessel 17 with a bow structure at each end.
  • One of the bows 18 is designed as a storm bow, whilst the other bow 19 is designed as a normal bulbous bow.
  • a rotating part 21, geostationary with the aid of mooring lines 20, is pivotally supported in a well 22 in the vessel 17.
  • a heave compensated string 23 runs down into the sea through the rotating part 21. Between the rotating part 21 and the seabed, not shown in Fig. 2, there run flexible risers 24.
  • the ship 17 has an extra service well 25 through which it is possible to pass a string 26 up and down, and for example, carry out work or operations on the non-illustrated seabed.
  • Living quarters 25 are located in the area close to the bow 19.
  • the ship 17 has positioning/driving means 28 in the form of azimuth thrusters.
  • the vessel 17 operates in the same modes of operation as the vessel 1 in Fig. 1, with the bow 19 facing into the wind and weather in operational mode 1 (fine weather mode), with the well/rotating part 22, 21 located astern of the centre of the vessel.
  • the storm bow 18 is brought into the wind and weather according to need, in the same way as the bow 12 in the embodiment in Fig. 1.
  • the invention provides a vessel which is operable with a high degree of regularity for drilling operations, which vessel can at the same time be used for production and storage and also service operations (through the well 25). It is not shown, but a person versed in the art will understand that the hull of the vessel can be designed to have a lean "foreship” and full “stern". The terms “foreship” and “stern” refer here to the ship's directional position in mode 1, with the well/turret placed astern of the centre of the vessel.
  • the invention makes possible an optimal drilling/production ship which will have a regularity that is fully comparable with today's semi-submersible drilling platforms.
  • a turret located astern will relieve the stresses in the midship.
  • a midship bending moment is generally a problem when there are large openings for a turret.
  • the location of the living quarters on production ships is the subject of much discussion. Some people prefer a location at the back (downwind), others prefer a position in front (upwind). The disadvantage of a rear position is that any explosion and subsequent fire in a downwind position is disastrous with regard to safety.
  • it is a preferable location with a view to launching the lifeboats drift away from the vessel. The forward location is better as regards safety, but will be dangerously close to turret drilling, and could present major problems as regards launching the lifeboats.
  • the proposed vessel according to the application has living quarters in the bow in mode 1 - operation, i.e., upwind at some distance from the turret/drilling, i.e., a good starting point for safety. If it is required to launch lifeboats, it will be relatively easy to let the ship turn in a direction so that the lifeboats do not drift straight into possible burning oil on the sea surface. In extreme weather the vessel will be switched to mode 2 - extreme. The location of the living quarters according to the invention will then be optimal as regards comfort and the possibility of launching lifeboats in storm conditions.
  • Fig. 3 shows a favourable distribution of various types of units and packages on a ship according to the invention, of the type shown in Fig. 2.
  • the vessel 17 has a bow 18 designed as a storm bow, whilst its other bow 19 is designed as a normal bulbous bow.
  • a geostationary rotating part 21 is pivotally supported in a well 22 in the vessel 17, and an extra service well 25 is provided close to the well 22. 8
  • living quarters 27 are arranged at the area close to the bow 19. Then, in the direction towards the bow 18, there follows a power plant 29, a drilling package 30, a process plant 31 and a flare tower 32.
  • Fig. 4 is a plan view of the vessel 17 in Fig. 2, with the same reference numerals.
  • the anchor lines 20 are arranged so that a large sector 33 is kept free, where desired operations can be carried out through the service well.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

L'invention concerne un navire permettant de réaliser des opérations de type forage et production en mer, lequel navire est conçu avec deux proues (11 et 12). Le bateau comporte une ouverture verticale ou puits (17) et à l'intérieur, une partie rotative (6) pouvant être fixée aux fonds marins (4) au moyen de câbles d'amarrage (5), de manière que la partie rotative (6) devienne un composant géostationnaire. Le puits (7) et la partie rotative (6) sont disposés de façon excentrique par rapport au centre du navire et plus à l'écart de la proue (119, qui, en conditions normales, sera exposée au vent et aux intempéries. Si les conditions météorologiques viennent à dépasser une certaine limite, le navire (1) peut être tourné de 180°, l'autre proue (12) étant conçue comme proue résistant aux tempêtes, exposée au vent et aux intempéries.
PCT/NO1998/000069 1998-03-04 1998-03-04 Navire de surface WO1999044883A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/NO1998/000069 WO1999044883A1 (fr) 1998-03-04 1998-03-04 Navire de surface
AU73516/98A AU7351698A (en) 1998-03-04 1998-03-04 Surface vessel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/NO1998/000069 WO1999044883A1 (fr) 1998-03-04 1998-03-04 Navire de surface

Publications (1)

Publication Number Publication Date
WO1999044883A1 true WO1999044883A1 (fr) 1999-09-10

Family

ID=19907871

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1998/000069 WO1999044883A1 (fr) 1998-03-04 1998-03-04 Navire de surface

Country Status (2)

Country Link
AU (1) AU7351698A (fr)
WO (1) WO1999044883A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001031164A1 (fr) * 1999-10-27 2001-05-03 Single Buoy Moorings Inc. Batiment de forage flottante et de reconditionnement pourvue d'un train de tiges de forage s'etendant au moins a travers une tete d'injection
US6457536B1 (en) * 1999-09-15 2002-10-01 Kvaerner Oil & Gas A.S. Method and system for exploiting natural resources under the seabed

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4509448A (en) * 1983-10-13 1985-04-09 Sonat Offshore Drilling Inc. Quick disconnect/connect mooring method and apparatus for a turret moored drillship
US4519728A (en) * 1982-04-16 1985-05-28 Mitsui Engineering And Shipbuilding Company, Ltd. Floating offshore structure
US4604961A (en) * 1984-06-11 1986-08-12 Exxon Production Research Co. Vessel mooring system
EP0656293A1 (fr) * 1993-12-02 1995-06-07 Imodco, Inc. Système de tourelle d'amarrage pour bateau

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4519728A (en) * 1982-04-16 1985-05-28 Mitsui Engineering And Shipbuilding Company, Ltd. Floating offshore structure
US4509448A (en) * 1983-10-13 1985-04-09 Sonat Offshore Drilling Inc. Quick disconnect/connect mooring method and apparatus for a turret moored drillship
US4604961A (en) * 1984-06-11 1986-08-12 Exxon Production Research Co. Vessel mooring system
EP0656293A1 (fr) * 1993-12-02 1995-06-07 Imodco, Inc. Système de tourelle d'amarrage pour bateau

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6457536B1 (en) * 1999-09-15 2002-10-01 Kvaerner Oil & Gas A.S. Method and system for exploiting natural resources under the seabed
WO2001031164A1 (fr) * 1999-10-27 2001-05-03 Single Buoy Moorings Inc. Batiment de forage flottante et de reconditionnement pourvue d'un train de tiges de forage s'etendant au moins a travers une tete d'injection
US6968899B1 (en) 1999-10-27 2005-11-29 Single Buoy Moorings Inc. Drilling-workover vessel having a drill string extending through at least one swivel

Also Published As

Publication number Publication date
AU7351698A (en) 1999-09-20

Similar Documents

Publication Publication Date Title
US7543543B2 (en) Floating LNG import terminal and method for docking
RU2422320C2 (ru) Система для загрузки и разгрузки углеводородов в водах, предрасположенных к образованию льда
US8231420B2 (en) Submersible mooring system
EP2744703B1 (fr) Système et connecteur d'amarrage
CA2285955C (fr) Navire en deux parties, utile pour le transport de petrole dans des eaux arctiques
US6485343B1 (en) Dynamic positioning dock-loading buoy (DPDL-buoy) and method for use of such a DPDL-buoy
US9616975B2 (en) Disconnectable production dock (DPD) for turret free disconnectable weather vaning FPSO
JP4018134B2 (ja) 海の沖からの炭化水素の搬送並びに製造並びに／もしくは充填／排出、並びに／もしくは油井を取り扱うための船
US6457536B1 (en) Method and system for exploiting natural resources under the seabed
WO2000027692A1 (fr) Dispositif pour positionner des vaisseaux
WO1999044883A1 (fr) Navire de surface
WO2004074085A1 (fr) Procede permettant de maintenir un navire dans une position et une orientation souhaitees en cooperation avec une unite de couplage amarree au navire
WO2022049263A1 (fr) Corps flottant et système d'amarrage
WO1998030438A1 (fr) Dispositif pour navire de forage et d'exploitation
KR20220137987A (ko) 라이저 문풀을 포함하는 스프레드 계류 선박
WO2000021825A1 (fr) Bouee de chargement
Newport A Historical Review of Disconnectable Moorings for Ship Shaped Floating Production Units
Lopez-Cortijo et al. DP FPSO-A Fully Dynamically Positioned FPSO For Ultra Deep Waters
Crowle et al. Transport Vessels for Floating Wind
CA2680755C (fr) Procede et dispositif de couplage d'un petrolier en mer
EP3437979A1 (fr) Barge de colonne montante d'accueil pour fpso
AU2009320492B2 (en) Disconnectable production dock (DPD) for turret free disconnectable weather vaning FPSO
De Boom The development of turret mooring systems for floating production units
Ji A State of Art FPSO With Dry Tree System
Christensson et al. Floating Production and Offshore Loading using Dynamic Positioning

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH GM GW HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
NENP Non-entry into the national phase

Ref country code: KR

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA