+

WO1999039971A1 - Navire a ouvertures verticales pour operations de forage en mer - Google Patents

Navire a ouvertures verticales pour operations de forage en mer Download PDF

Info

Publication number
WO1999039971A1
WO1999039971A1 PCT/NO1999/000034 NO9900034W WO9939971A1 WO 1999039971 A1 WO1999039971 A1 WO 1999039971A1 NO 9900034 W NO9900034 W NO 9900034W WO 9939971 A1 WO9939971 A1 WO 9939971A1
Authority
WO
WIPO (PCT)
Prior art keywords
deck
ship
hull bottom
area
areas
Prior art date
Application number
PCT/NO1999/000034
Other languages
English (en)
Inventor
Kåre SYVERTSEN
Arne Smedal
Original Assignee
Hitec Systems As
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 Hitec Systems As filed Critical Hitec Systems As
Priority to EP99909423A priority Critical patent/EP1053171B1/fr
Priority to CA002319487A priority patent/CA2319487A1/fr
Priority to PL99342664A priority patent/PL342664A1/xx
Priority to AU28625/99A priority patent/AU747520B2/en
Priority to JP2000530419A priority patent/JP2002502761A/ja
Priority to DE69912244T priority patent/DE69912244T2/de
Priority to BR9910888-7A priority patent/BR9910888A/pt
Priority to KR1020007008544A priority patent/KR20010040670A/ko
Publication of WO1999039971A1 publication Critical patent/WO1999039971A1/fr
Priority to US09/627,335 priority patent/US6397770B1/en

Links

Classifications

    • 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
    • B63B3/48—Decks
    • 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
    • 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

Definitions

  • the present invention relates to a ship for use in offshore operations which has one or more vertical openings in the hull, so-called moonpools. Openings in the hull of a ship which, e.g., is to be used as a drill ship, are quite common today, occurring both singly and severally, and are used for a variety of tasks. In some situations it is desirable to arrange fixedly mounted equipment in proximity to such a moonpool in order to carry out specific tasks. This could be, e.g., a derrick, a crane arrangement for launching and taking up, for instance, ROV, or other equipment for the execution of operations through these openings in the hull.
  • the openings are usually arranged along the longitudinal centre line of the ship and may be of a variety of cross-sectional shapes and sizes, but often they are rectangular or approximately rectangular, and if there are several openings, these are arranged one after the other along the longitudinal centre line of the ship and may have the same cross- sectional shape and size. If the openings are not used for specific tasks, they may be built into a ship to have an impact on its motions
  • the rectangular openings have an effect on the stress distribution in, ter alia, the deck and hull bottom plates when the ship is exposed to stresses caused by waves and other loads. In some areas, notches may occur which result in concentrations of stress, where the level of stress may be considerably higher than the average stresses in the deck or hull bottom plates. Stress concentrations will occur in particular at the corners of rectangular openings, even though the corners are designed so as to minimise notch effect. It is also possible to alleviate the situation by designing bracket plates and local reinforcements appropriately, but the stress concentration factor will often be high, and a stress concentration factor of 2 is by no means unusual.
  • the load picture and the stress distribution will be more complicated and uncertain when, e.g., a derrick for use through the hull opening is to be fixedly mounted in the area of stress concentrations, or in proximity to such areas.
  • stresses and stress concentration should be the lowest and most uniform possible with no local stress concentrations, or the potential for these. This may also result in designs that are simpler to produce, which in turn will help to reduce costs in connection with the production of the ship.
  • One of these is to reduce the notch effect in the deck and hull bottom plates, and the other solution, towards which the present invention is directed, concentrates on the positioning and design of the deck and hull bottom plates at the site of cut-outs which, e.g., are rectangular, in relation to the transverse neutral axis of the ship.
  • the invention relates to a ship as disclosed in the preamble of claim 1, having the characteristics that are disclosed in the characterising clause of claim 1. Additional embodiments of the invention are disclosed in the other claims.
  • the deck plates (on the upper deck) and the bottom plates on the side of the moonpool will be continuous without any cut-outs which result in notches and thus stress concentrations.
  • Fig. 1 is a lateral sectional view of a hull with three moonpools taken through the centre line of the ship, wherein the deck and hull bottom plates between each moonpool are displaced in accordance with the present invention
  • Fig. 2 is a lateral sectional view of a ship with one moonpool taken through the centre line of the ship, wherein the deck and hull bottom plates abaft of and forward of the moonpool are displaced in accordance with an embodiment of the present invention.
  • Fig. 3 is a lateral sectional view of a ship with one moonpool taken through the centre line, wherein the deck and hull bottom plates are displaced in accordance with an embodiment of the present invention
  • Fig. 4 is a top view of the hull as shown in Fig. 1 ;
  • Fig. 5 is a top view of the hull shown in Fig. 2;
  • Fig. 6 is a top view of the hull shown in Fig. 3;
  • Fig. 7 is a transverse section in the centre of a moonpool of a ship having a double bottom and double deck, wherein the deck and hull bottom plates are arranged in accordance with the present invention
  • Fig. 8 is a transverse section in the centre of a moonpool of a ship having a double bottom and double deck, wherein the deck and hull bottom plates are arranged in accordance with the present invention
  • Fig. 9 is a transverse section in the centre of a moonpool of a ship having a single bottom and single deck, wherein the deck and hull bottom plates are arranged in accordance with the present invention
  • Fig.10 is a transverse section in the centre of a moonpool of a ship having a double bottom but not a double deck.
  • the deck plate at the moonpool is displaced in accordance with the present invention.
  • Fig. 1 One embodiment of the present invention is indicated in Fig. 1 in a lateral sectional view through the centre line of a hull having three through-going vertical openings 2, also known as moonpools, positioned one after the other in the longitudinal direction.
  • the deck area 8 and the hull bottom area 4 between each of the openings 2 have been displaced in such a way that the deck plates 8 are displaced down towards the ship's transverse neutral axis 20, and similarly the hull bottom plates 4 are displaced relative to the rest of the ship's hull bottom, towards the ship's transverse neutral axis 20.
  • Fig. 4 where the same construction as that in Fig.
  • FIG. 1 is shown in a top view, wherein the openings, or the moonpools 2, are positioned along the centre line of the ship with deck areas 8 therebetween.
  • the hatched deck areas 8 have thus been moved to an area where the average stress level is lower, and as a result of this positioning, the impact of the notch effect at corners etc. will be reduced.
  • Fig. 2 is a lateral sectional view of a hull with a moonpool 2 taken through the centre line.
  • the deck area on each side of the moonpool is divided into the areas 9 and 10, both of which are displaced towards the ship's transverse neutral axis 20 relative to the rest of the deck.
  • the hull bottom plates 5 and 6 have also been displaced in a vertical direction towards the transverse neutral axis 20 of the ship.
  • the solution in Fig. 2 differs from that in Fig. 1 in that in this case it is the deck and hull bottom plate areas in the forward and after edge of the moonpool 2 that have been displaced, whilst in Fig.
  • Both the displacement of the deck plates 9 and 10 and the displacement of the hull bottom plates 5 and 6 are arranged stepwise so that the deck plates 9 and the hull bottom plates 5 are displaced further in a vertical direction towards the ship's transverse neutral axis 20 than the deck plates 10 and the hull bottom plates 6. This is done to further reduce the notch effect, thereby helping to reduce the stress concentrations in the construction of the deck area and hull bottom area in addition to the displacement thereof towards an area having a lower average stress level.
  • FIG. 3 shows a lateral sectional view of a hull with one moonpool 2 taken through the centre line, and the deck areas on the after and forward sides of the moonpool are displaced in accordance with the invention at deck areas 1 la and 1 lb. Furthermore, the hull bottom plate areas on the forward and after sides of the moonpool 2 are displaced at the hull bottom plates 7a and 7b.
  • the junction between the displaced areas and the rest of the surrounding deck and hull bottom plate areas is indicated by an approximately linear inclined plane 7b, 1 lb, which is also a design model for reducing the notch effect in the areas around the moonpool.
  • the degree of displacement of the deck plate or hull bottom plate towards the ship's transverse neutral axis 20, in accordance with the present invention, may vary according to the average stress level that is desirable, whilst the practical considerations relating to the design of the ship will prevail with respect to the positioning of these deck and hull bottom plates.
  • Fig. 7 shows a transverse section of a ship having a double bottom and "double" deck and a centrally located moonpool 2.
  • the deck area and hull bottom area at the forward and/or after side of the moonpool are displaced relative to the rest of the deck area and hull bottom area towards the ship's transverse neutral axis.
  • this has been done by removing the upper deck plate and lower hull bottom plate in the double deck and double bottom construction, thereby displacing the deck plate area and the hull bottom area in the vertical direction to the position of the lower deck plate and the upper hull bottom plate.
  • the local stress notches around the moonpool have been moved to a level where the average stress level in the cross section is lower. If this displacement achieves a reduction in the average stress level of 20-40%, it could at a rough estimate have the effect of increasing fatigue life by something in the range of 100 to 200%.
  • Fig. 8 also shows a transverse section of a hull having a moonpool 2 wherein there is provided both a double deck and a double bottom.
  • the deck area and the hull bottom area on each side of the moonpool have been displaced in the vertical direction towards the ship's transverse neutral axis by placing a separate deck level between the upper and lower deck in the double deck configuration, and also a separate hull bottom level between the upper and lower bottom in the double bottom construction.
  • Fig. 9 shows a transverse section of a hull with moonpool 2, wherein there is provided a single deck and a single hull bottom.
  • the displacement of the deck area and hull bottom area on each side of the moonpool has not been related to any lower deck levels or upper hull bottom levels, and the advantageous effect of the invention has been achieved here simply by displacing a part of the deck area and the hull bottom area in the vertical direction towards the transverse neutral axis of the ship.
  • the displacement of the deck area and the hull bottom area need not be symmetrical by their being displaced an equal distance towards the transverse neutral axis.
  • it is not necessary to displace both deck area and hull bottom area which is illustrated in Fig. 10.
  • This figure shows a transverse section of a hull with moonpool 2 where only the deck area has been displaced in the vertical direction towards the ship's transverse neutral axis.
  • a ship having one or more moonpools wherein one or more of the areas between these moonpools may be displaced in the vertical direction towards the ship's transverse neutral axis.
  • the displacement need not be symmetrical about the neutral axis, i.e., that the deck plate and hull bottom plate are not necessarily displaced an equal distance, or that only one of them is displaced in the vertical direction.
  • it may be appropriate to have different vertical displacement between the different moonpools.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Vibration Prevention Devices (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Earth Drilling (AREA)
  • Foundations (AREA)

Abstract

L'invention concerne un navire pour opérations de forage en mer, dont la coque comporte une ou plusieurs ouvertures (trappes) verticales. Dans cette configuration, les parties basses du pont et/ou de la coque comprises entre ces ouvertures et/ou sinon sensiblement adjacentes auxdites ouvertures sont déplacées par rapport au reste des parties basses du pont et/ou de la coque, de manière à occuper une position plus proche de l'axe transversal neutre du navire. La zone comprise entre ces autres parties basses et, sensiblement, la ou les parties basses déplacées est progressivement échelonnée. Selon une variante, la zone entre la ou les parties basses déplacées au niveau des ouvertures du navire et les autres parties basses peut comporter un ou plusieurs échelons, ou bien avoir une forme de jonction approximativement linéaire ou courbe.
PCT/NO1999/000034 1998-02-05 1999-02-03 Navire a ouvertures verticales pour operations de forage en mer WO1999039971A1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
EP99909423A EP1053171B1 (fr) 1998-02-05 1999-02-03 Navire a ouvertures verticales pour operations de forage en mer
CA002319487A CA2319487A1 (fr) 1998-02-05 1999-02-03 Navire a ouvertures verticales pour operations de forage en mer
PL99342664A PL342664A1 (en) 1998-02-05 1999-02-03 Coasting-trade ship with vertical openings
AU28625/99A AU747520B2 (en) 1998-02-05 1999-02-03 Ship for offshore operations with vertical openings
JP2000530419A JP2002502761A (ja) 1998-02-05 1999-02-03 垂直開口を有する沖合作業船
DE69912244T DE69912244T2 (de) 1998-02-05 1999-02-03 Schiff für den offshore-einsatz mit vertikalen öffnungen
BR9910888-7A BR9910888A (pt) 1998-02-05 1999-02-03 Navio para operação fora da costa que tem uma aberturas totalmente ou parcialmente vazadas no casco
KR1020007008544A KR20010040670A (ko) 1998-02-05 1999-02-03 수직 개구를 갖는 근해 작업용 선박
US09/627,335 US6397770B1 (en) 1999-02-03 2000-07-28 Ship for offshore operations with vertical openings

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO980498A NO308348B1 (no) 1998-02-05 1998-02-05 Skip for offshore operasjoner, med vertikale Õpninger
NO19980498 1998-02-05

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US09/627,335 Continuation US6397770B1 (en) 1999-02-03 2000-07-28 Ship for offshore operations with vertical openings

Publications (1)

Publication Number Publication Date
WO1999039971A1 true WO1999039971A1 (fr) 1999-08-12

Family

ID=19901632

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1999/000034 WO1999039971A1 (fr) 1998-02-05 1999-02-03 Navire a ouvertures verticales pour operations de forage en mer

Country Status (14)

Country Link
EP (1) EP1053171B1 (fr)
JP (1) JP2002502761A (fr)
KR (1) KR20010040670A (fr)
CN (1) CN1119259C (fr)
AU (1) AU747520B2 (fr)
BR (1) BR9910888A (fr)
CA (1) CA2319487A1 (fr)
DE (1) DE69912244T2 (fr)
ES (1) ES2211054T3 (fr)
NO (1) NO308348B1 (fr)
PL (1) PL342664A1 (fr)
PT (1) PT1053171E (fr)
RU (1) RU2243128C2 (fr)
WO (1) WO1999039971A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10730589B2 (en) 2015-05-04 2020-08-04 Gustomsc B.V. Vessel provided with a moon pool

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101159196B1 (ko) * 2008-10-27 2012-06-25 삼성중공업 주식회사 문풀 및 이를 구비한 시추선
CN101725162B (zh) * 2008-10-10 2011-11-16 鄂州市三祥机械有限公司 井式抓斗挖砂、清淤船

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4081163A (en) * 1976-10-04 1978-03-28 Guinn David C Blow out preventer handling system
US4281716A (en) * 1979-08-13 1981-08-04 Standard Oil Company (Indiana) Flexible workover riser system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4448568A (en) * 1982-06-22 1984-05-15 Mobil Oil Corporation Marine surface facility work station for subsea equipment handling
US5305703A (en) * 1992-12-31 1994-04-26 Jens Korsgaard Vessel mooring system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4081163A (en) * 1976-10-04 1978-03-28 Guinn David C Blow out preventer handling system
US4281716A (en) * 1979-08-13 1981-08-04 Standard Oil Company (Indiana) Flexible workover riser system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10730589B2 (en) 2015-05-04 2020-08-04 Gustomsc B.V. Vessel provided with a moon pool

Also Published As

Publication number Publication date
ES2211054T3 (es) 2004-07-01
PL342664A1 (en) 2001-07-02
EP1053171B1 (fr) 2003-10-22
PT1053171E (pt) 2004-02-27
NO980498D0 (no) 1998-02-05
JP2002502761A (ja) 2002-01-29
EP1053171A1 (fr) 2000-11-22
CN1119259C (zh) 2003-08-27
CA2319487A1 (fr) 1999-08-12
DE69912244T2 (de) 2004-08-26
NO980498L (no) 1999-08-06
NO308348B1 (no) 2000-09-04
RU2243128C2 (ru) 2004-12-27
CN1295523A (zh) 2001-05-16
AU747520B2 (en) 2002-05-16
DE69912244D1 (de) 2003-11-27
KR20010040670A (ko) 2001-05-15
BR9910888A (pt) 2001-04-17
AU2862599A (en) 1999-08-23

Similar Documents

Publication Publication Date Title
US7918174B2 (en) Anti-sloshing device in moon-pool
US6125780A (en) Floating barge-platform and method of assembly
US8220407B2 (en) Battered column semi-submersible offshore platform
CN101181927B (zh) 半潜式海洋多功能工程船
US7011472B2 (en) Semi-submersible offshore vessel
US6997132B2 (en) Semi-submersible offshore vessel and methods for positioning operation modules on said vessel
US6220194B1 (en) Hull construction
EP1053171B1 (fr) Navire a ouvertures verticales pour operations de forage en mer
US6397770B1 (en) Ship for offshore operations with vertical openings
CN110027671B (zh) 一种底纵桁集中布置的集装箱船底部结构
US6854411B2 (en) Semi-submersible offshore platform and methods for positioning operation modules on said platform
GB2187679A (en) Floating platform structure
CN102046458B (zh) 配合
JP3780615B2 (ja) 二重殻船の二重底内交通装置
JP2007050814A (ja) 高速コンテナ船
AU2022263178A1 (en) Floating structure
KR200219567Y1 (ko) 해수교환 방파제
CN111776134A (zh) 一种舱底结构及坐底驳船
JP2002255090A (ja) 繋船用浮き桟橋
JPS62203895A (ja) 半潜水式海洋構造物のコラム形状
JPS61253287A (ja) 海洋構造物

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 99804596.9

Country of ref document: CN

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 GD GE GH GM HR HU ID IL IN 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 CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW 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)
WWE Wipo information: entry into national phase

Ref document number: 09627335

Country of ref document: US

WWE Wipo information: entry into national phase

Ref document number: 28625/99

Country of ref document: AU

ENP Entry into the national phase

Ref document number: 2319487

Country of ref document: CA

Ref document number: 2319487

Country of ref document: CA

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 1020007008544

Country of ref document: KR

WWE Wipo information: entry into national phase

Ref document number: 1999909423

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1999909423

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

WWP Wipo information: published in national office

Ref document number: 1020007008544

Country of ref document: KR

WWG Wipo information: grant in national office

Ref document number: 28625/99

Country of ref document: AU

WWG Wipo information: grant in national office

Ref document number: 1999909423

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 1020007008544

Country of ref document: KR

点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载