EP1597141A2 - Systeme porteur de colonnes de monte et procede associe - Google Patents

Systeme porteur de colonnes de monte et procede associe

Info

Publication number
EP1597141A2
EP1597141A2 EP04715646A EP04715646A EP1597141A2 EP 1597141 A2 EP1597141 A2 EP 1597141A2 EP 04715646 A EP04715646 A EP 04715646A EP 04715646 A EP04715646 A EP 04715646A EP 1597141 A2 EP1597141 A2 EP 1597141A2
Authority
EP
European Patent Office
Prior art keywords
vessel
keel
riser
hull
risers
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Withdrawn
Application number
EP04715646A
Other languages
German (de)
English (en)
Inventor
Pieter G. Wybro
Shakai Wu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sea Engineering Associates Inc
Modec International LLC
Original Assignee
Sea Engineering Associates Inc
Modec International LLC
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 Sea Engineering Associates Inc, Modec International LLC filed Critical Sea Engineering Associates Inc
Publication of EP1597141A2 publication Critical patent/EP1597141A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/002—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling
    • E21B19/004—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling supporting a riser from a drilling or production platform
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • 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
    • B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
    • B63B1/107—Semi-submersibles; Small waterline area multiple hull vessels and the like, e.g. SWATH
    • 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
    • B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
    • B63B1/12—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly
    • B63B2001/128—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly comprising underwater connectors between the hulls
    • 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
    • B63B21/502—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers by means of tension legs

Definitions

  • the present invention relates generally to offshore hydrocarbon production and more particularly to fixing a keel guide on the submerged perimeter of the hull of a tension leg platform or other floating offshore vessel to laterally support a riser or umbilical extending vertically or near vertically from the seabed.
  • a riser pipe is used to connect a subsea wellhead structure at the sea floor with the hydrocarbon processing system located on a floating platform maintained in position above the wellhead.
  • the lower ends of the risers are connected to the sea floor by structures embedded in the sea floor and grouted or cemented thereto.
  • a floating structure such as a tension leg platform (TLP) or a semi-submersible platform
  • TLP tension leg platform
  • the riser is typically suspended from the floating vessel using a support platform.
  • a typical TLP (10) consists of one or more decks (20) with equipment for production and processing of hyrdocarbons.
  • the deck (20) is supported by a hull (18), which is submerged or partially submerged and which provides the buoyant force for the platform.
  • the hull (18) provides attachment points ⁇ 19) for tendons (12) anchored to the seabed (11).
  • the hull (18) may comprise one or more submerged pontoons, often positioned to form a horizontal triangle, square or circle, or as illustrated in Figures 1 and 2, a cruciform structure.
  • One or more vertical columns (22) extend from the hull (18) upwards through the water's surface and attach to the deck (20).
  • Risers (14) or umbilicals extend from subsea wells (40) to the platform (10).
  • the risers (14) are traditionally vertically suspended and laterally supported below the water's surface by a structure (16) attached to the platform (10).
  • Risers are traditionally spaced apart from the hull to minimize impact with the hull caused by environmental forces and to allow easier termination of the risers.
  • Figures 1-2 disclose a moored TLP of prior art with risers (14) vertically suspended and laterally supported under water by a truss extending outboard from the hull.
  • FIGS. 3 and 4 show a prior art TLP (10) moored by tendons (12) connected to the hull (18) at attachment points (19).
  • the TLP (10) has columns (22) supporting a superstructure with decks (20).
  • this TLP hull (18) is configured with pontoons forming a square within a cruciform shape.
  • a rectangular array of risers (14) passes through the center of the platform (10), suspended below the water's surface and laterally braced interiorly away from the hull by a grid-like network of struts (16).
  • U.S. 6,273,018 shows a buoyant offshore platform using a similar arrangement of risers passing through the center of the platform and supported by trusses.
  • Floating offshore vessels have structures which extend well below the surface of the water and which are subjected to environmental forces resulting in movement of the platform. Both the upper and lower ends of the risers are affected by movement of a floating platform.
  • Forces acting on a floating vessel and riser pipe system include forces resulting from heave, pitch, roll, sway or surge, height and period of waves and swells, currents, specific gravity of fluid conducted within the riser, buoyancy means attached to the riser, current profile, offset of the platform from the well, tension at the top of the riser, the stiffness of the riser, and the riser's vertical disposition.
  • riser stroke is also a function of platform design. Locating risers close to the hull reduces potential riser stroke, while locating risers further away from the hull increases potential riser stroke. To compensate for riser stroke, the upper ends of risers are connected to the platform by relatively complex riser tensioning systems which permit the platform to move relative to the riser and at the same time maintain a desired tension on the riser. It is advantageous to place risers close to the vessel hull to provide increased and simplified lateral support to the risers or umbilicals without an extensive network of struts.
  • the primary object of the invention is provide a floating platform designed to have risers or umbilicals that are vertically or near vertically suspended above the keel of the floating platform and that are laterally supported by keel guides positioned along the perimeter of the platform's hull at an elevation at or near the keel.
  • Another object of the invention is to provide lateral support to risers or umbilicals at a vertical elevation at or near the keel or the vertical elevation of the hull attachment poinst for mooring tendons.
  • Another object of the invention is to provide increased riser structural support, with a lateral support structure integral to or rigidly connected with the hull.
  • Another object of the invention is to provide a method to reduce the impact of wave action on the risers or umbilicals in the wave zone, minimizing riser/hull clashing and increasing riser fatigue life while allowing the risers to be arranged vertically or near vertically close to the hull.
  • a floating offshore system such as a TLP or semi- submersible platform, which mates with risers or umbilicals extending vertically or near vertically from the ocean floor.
  • the risers are suspended vertically from above the keel (and usually, but not necessarily, above the water's surface) and are supported laterally at or near the hull by keel guides positioned along the submerged perimeter of the platform's hull, or within the hull by production riser slots.
  • the keel guides or production riser slots are designed and arranged to receive a keel joint which provides a bearing surface to laterally support the riser while allowing free vertical movement relative to the platform.
  • the keel guides may be positioned on outboard-facing hull surfaces, inboard-facing hull surfaces, or within a moonpool.
  • Figure 1 illustrates a side view of a moored TLP of prior art having risers suspended under water from truss extending outboard from the hull;
  • Figure 2 is a cross section taken along lines 2-2 of Figure 1 ;
  • Figure 3 illustrates a side view of a moored TLP of prior art having risers suspended under water using a grid network attached to the interior sides of the TLP pontoons;
  • FIG. 4 is a cross section taken along lines 4-4 of Figure 3;
  • Figure 5 is side view of a moored TLP according to the invention having risers vertically suspended from above the waterline and laterally supported below the waterline adjacent to and outboard of the TLP hull using keel guides;
  • Figure 6 is a cross section talcen along lines 6-6 of Figure 5 showing risers laterally supported near the keel using keel guides attached to the outboard hull surfaces according to the invention;
  • Figure 7 is an enlarged side view of a portion of Figure 5 showing detail of the keel guides
  • Figure 8 is a perspective view of an open frame side-entry keel guide according to the invention
  • Figure 9 is a cross section of a typical keel joint or prior art
  • Figure 10 is a vertical cross section of a TLP according to the invention showing a riser tensioner located on a platform deck;
  • Figure 11 is a horizontal cross section of a TLP according to the invention having risers laterally supported near the keel using keel guides attached to the inboard pontoon surfaces;
  • Figure 12 is a horizontal cross section of a TLP according to the invention having a moonpool with keel guides disposed therein; and Figure 13 is a horizontal cross section of a TLP according to the invention having riser production slots in the bottom of the TLP hull. DESCRIPTION OF THE PREFERRED EMBODIMENT OF THE INVENTION
  • this invention concerns a floating offshore system, such as a TLP or semi-submersible platform, hereinafter referred to simply as platform 10.
  • the platform consists of one or more decks 20 with equipment for production and processing of hyrdocarbons, drilling, and workover.
  • the deck 20 provides utility, safety, and supporting structures for human use.
  • the deck 20 is supported by a hull 18 which is submerged or partially submerged and which provides the buoyant force for the platform.
  • the hull 18 provides attachment points 19 for tendons 12 or other means of mooring.
  • the hull 18 may include one or more submerged pontoons, often positioned to form a horizontal triangle, square, circle, or cruciform-shaped structure.
  • One or more vertical columns 22 extend from the hull 18 upwards through the water's surface and attach to the deck 20.
  • the platform 10 mates with one or more risers 14 or umbilicals extending vertically or near vertically from the ocean floor 11.
  • the risers 14 are used for drilling, production, export, or injection of water, gas or chemicals.
  • the risers 14 according to the invention are vertically suspended above the keel 26, preferably from the deck 20.
  • the platform 10 includes keel guides 7, also known as keel joint receptacles or support receptacles, which are positioned along the exterior submerged perimeter of the hull 18 and which simply provide lateral support to the risers 14.
  • keel guides 7 may be positioned at an elevated position on the hull 18, the keel guides 7 are preferably located at or near the vertical elevation of the keel 26 and/or the vertical elevation of the hull tendon attachment points (tendon porches). It is desirable, particularly in the case of TLPs, for the vertical elevation of the keel guides 7 to be kept at or close to that of the tendon porches so that the top of the risers at the keel guide level moves in parallel with the top of the tendons.
  • Each riser 14 is equipped with a keel joint assembly 8 which is received into a keel guide 7.
  • the keel joint 8 provides a bearing surface for riser 14, allowing the riser to freely move along its vertical axis within the keel guide 7 while being supported laterally.
  • Figure 7 is an enlarged view of the six keel guides illustrated in Figure 5 which provides greater detail of the structure of the keel guides but which slows only one riser 14 and keel joint 8.
  • Keel guide 7 is a structure integral with the hull 18 or designed and arranged for rigid mounting to the vessel hull 18. Keel guide 7 is designed to receive particular riser keel joint 8. The keel guide 7 provides lateral support to a keel joint 8 and riser 14 ithin it. A keel guide can be of a slotted design 7A for side entry of the riser pipe or closed design 7B for vertical riser entry. A perspective sketch of a typical open frame side entry keel guide structure is shown in Figure 8. Keel joints are known in the art, and Figure 9 illustrates detail of an ordinary keel joint 8 of prior art. Riser 14 is fitted with a keel joint outer casing 60 and elastomeric bearings 62.
  • FIG. 10 illustrates a production riser system according to the invention.
  • Riser 14 is shown connected to a subsea wellhead 40 at the ocean floor 11.
  • the riser 14 is tensioned from deck 20 by a passive spring riser tensioner 42.
  • the tensioner 42 is located on the cellar deck of platform 10.
  • Riser 14 is laterally supported by a keel guide 7 attached to the platform hull 18 and keel joint 8 which is received in the keel guide 7.
  • the riser 14 terminates at a tubing head 44 and surface tree 46, with an injection umbilical 48 and a production umbilical 50 extending therefrom.
  • keel guides may be placed anywhere along the hull 18 perimeter, including both outboard exterior surfaces 30 as illustrated in Figure 6, and inboard exterior surfaces 32 as illustrated in Figure 11.
  • Figure 11 is a horizontal cross section of a TLP with a hull 18 formed by a ring shaped pontoon.
  • Keel guides 7 are attached directly to the hull on the inboard surfaces 32 for laterally supporting risers 14.
  • keel guides can simultaneously exist on both inboard surfaces 32 and outboard surfaces 30.
  • the hull 18 may include one or more moonpools 24.
  • a moonpool is an opening in or near the center of the hull 18 or a closure of some space around the hull 18 that is used to route and protect the risers 14, among other functions.
  • An open moonpool is one whose top and bottom are perforated to allow the routing of risers, and whose bottom and top are both below the water's surface.
  • a closed moonpool on the other hand, has a bottom located below the waterline and a top located above the waterline.
  • Keel guides 7 may also be positioned within an either an open moonpool or a closed moonpool.
  • the present invention provides an alternate structure for laterally supporting a riser.
  • Production riser slots or hawser pipe penetrations 6, positioned in the hull as shown in Figure 13, may be used.
  • the risers may be vertically supported by a tensioner located on deck 20, and keel joints are designed and arranged to fit within the production riser slots 6.
  • this invention is best suited for support of risers during platform operation, it may be used for temporary support of the risers as well.

Abstract

L'invention porte sur un système et un procédé d'accouplement des colonnes de montée ou ombilics s'étendant verticalement ou quasi verticalement depuis le fond jusqu'aux unités flottantes telles que des plates-formes à câbles tendus ou des plates-formes semi-submersibles. Lesdites colonnes, suspendues verticalement au-dessus de la quille du navire, sont orientées latéralement par des guides de quille ou des réceptacles de colonnes disposés le long du périmètre immergé de la coque, ou dans la coque via des ouvertures de passage des colonnes pratiquées au fond de la coque. Lesdits guides ou ouvertures comportent tous un ensemble de joints de quille d'orientation latérale des colonnes présentant une surface porteuse permettant les mouvements verticaux de la colonne.
EP04715646A 2003-02-28 2004-02-27 Systeme porteur de colonnes de monte et procede associe Withdrawn EP1597141A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US45138003P 2003-02-28 2003-02-28
US451380P 2003-02-28
PCT/US2004/005892 WO2004077951A2 (fr) 2003-02-28 2004-02-27 Systeme porteur de colonnes de monte et procede associe

Publications (1)

Publication Number Publication Date
EP1597141A2 true EP1597141A2 (fr) 2005-11-23

Family

ID=32962587

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04715646A Withdrawn EP1597141A2 (fr) 2003-02-28 2004-02-27 Systeme porteur de colonnes de monte et procede associe

Country Status (9)

Country Link
US (1) US20040182297A1 (fr)
EP (1) EP1597141A2 (fr)
JP (1) JP2006519137A (fr)
KR (1) KR20050109516A (fr)
CN (1) CN1777532A (fr)
AU (1) AU2004218479A1 (fr)
BR (1) BRPI0408048A (fr)
CA (1) CA2517365A1 (fr)
WO (1) WO2004077951A2 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005100737A1 (fr) * 2004-04-16 2005-10-27 Vetco Aibel As Systeme et procede de reglage d'un equipement de reconditionnement de puits
US7669660B1 (en) * 2008-11-26 2010-03-02 Floatec, Llc Riser disconnect and support mechanism
CN102030085B (zh) * 2009-09-30 2013-05-08 天津市海王星海上工程技术有限公司 一种浮式生产储油平台结构
US20110206466A1 (en) * 2010-02-25 2011-08-25 Modec International, Inc. Tension Leg Platform With Improved Hydrodynamic Performance
JP5665024B2 (ja) * 2010-07-02 2015-02-04 独立行政法人海上技術安全研究所 ライザー管の懸吊装置および係留管の連結装置
US8757082B2 (en) * 2011-07-01 2014-06-24 Seahorse Equipment Corp Offshore platform with outset columns
US9109404B2 (en) * 2011-10-17 2015-08-18 Cameron International Corporation Riser string hang-off assembly
US9352808B2 (en) * 2012-01-16 2016-05-31 Seahorse Equipment Corp Offshore platform having SCR porches mounted on riser keel guide
CN105283380B (zh) * 2013-04-15 2017-09-22 海马设备公司 用于干树半潜结构的立管张紧装置导体
NO335480B1 (no) * 2013-04-16 2014-12-15 Gva Consultants Ab Rørledningsoppheng
US20150232154A1 (en) * 2014-02-19 2015-08-20 Conocophillips Company Tension leg platform (tlp) having offset top tension riser (ttr) guides
US20150298775A1 (en) * 2014-04-17 2015-10-22 Floatec, Llc Low Heave Semi-Submersible Offshore Structure
WO2015168432A1 (fr) * 2014-04-30 2015-11-05 Seahorse Equipment Corp Système de colonne montante articulée en faisceau pour navire d'installation flottante de production, stockage et déchargement
JP2016117363A (ja) * 2014-12-19 2016-06-30 三井造船株式会社 フェアリングカバー
US9718518B2 (en) * 2015-02-06 2017-08-01 Exmar Offshore Company Methods for connecting to floating structures
JP2017052469A (ja) 2015-09-11 2017-03-16 三井造船株式会社 ライザー支持構造体を備える浮体設備
CN108049558A (zh) * 2017-12-30 2018-05-18 浙江亚厦装饰股份有限公司 吊顶、吊顶总成及吊顶的安装方法
CN111634369B (zh) * 2020-05-29 2022-03-18 中国船舶工业集团公司第七0八研究所 一种fpso锚链检测系统舷外护管结构
BR102020020314A2 (pt) * 2020-10-02 2022-04-19 Petróleo Brasileiro S.A. - Petrobras Balcão de riser polivalente (polyvalent riser balcony)

Family Cites Families (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648638A (en) * 1970-03-09 1972-03-14 Amoco Prod Co Vertically moored platforms
US3780685A (en) * 1971-04-09 1973-12-25 Deep Oil Technology Inc Tension leg offshore marine apparatus
US3785445A (en) * 1972-05-01 1974-01-15 J Scozzafava Combined riser tensioner and drill string heave compensator
JPS50147401A (fr) * 1974-05-16 1975-11-26
US4185694A (en) * 1977-09-08 1980-01-29 Deep Oil Technology, Inc. Marine riser system
US4130995A (en) * 1977-11-03 1978-12-26 Standard Oil Company (Indiana) VMP riser horizontal bearing
GB8302292D0 (en) * 1983-01-27 1983-03-02 British Petroleum Co Plc Riser support system
JPS6053489A (ja) * 1983-09-01 1985-03-27 Mitsubishi Heavy Ind Ltd 水上浮揚式掘削装置
US4657439A (en) * 1985-12-18 1987-04-14 Shell Offshore Inc. Buoyant member riser tensioner method and apparatus
NO171773C (no) * 1988-02-24 1993-05-05 Norwegian Contractors Strekkstagplattform samt fremgangsmaate for aa installere slike
US5118221A (en) * 1991-03-28 1992-06-02 Copple Robert W Deep water platform with buoyant flexible piles
US5147148A (en) * 1991-05-02 1992-09-15 Conoco Inc. Heave-restrained platform and drilling system
US5551802A (en) * 1993-02-08 1996-09-03 Sea Engineering Associates, Inc. Tension leg platform and method of installation therefor
US5439321A (en) * 1993-03-11 1995-08-08 Conoco Inc. Interruptive mobile production system
US5642966A (en) * 1993-12-30 1997-07-01 Shell Oil Company Compliant tower
US5683205A (en) * 1995-04-28 1997-11-04 Deep Oil Technology, Inc. Stress relieving joint for pipe and method
US5722492A (en) * 1996-08-22 1998-03-03 Deep Oil Technology, Incorporated Catenary riser support
US5873677A (en) * 1997-08-21 1999-02-23 Deep Oil Technology, Incorporated Stress relieving joint for riser
AU746242B2 (en) * 1997-08-22 2002-04-18 Kvaerner Oil & Gas Australia Pty. Ltd. Buoyant substructure for offshore platform
US5865566A (en) * 1997-09-16 1999-02-02 Deep Oil Technology, Incorporated Catenary riser support
US6309141B1 (en) * 1997-12-23 2001-10-30 Shell Oil Company Gap spar with ducking risers
US6431107B1 (en) * 1998-04-17 2002-08-13 Novellant Technologies, L.L.C. Tendon-based floating structure
US6206614B1 (en) * 1998-04-27 2001-03-27 Deep Oil Technology, Incorporated Floating offshore drilling/producing structure
FR2782341B1 (fr) * 1998-08-11 2000-11-03 Technip Geoproduction Installation d'exploitation d'un gisement en mer et procede d'implantation d'une colonne montante
US6176646B1 (en) * 1998-10-23 2001-01-23 Deep Oil Technology, Incorporated Riser guide and support mechanism
US6386798B2 (en) * 1999-03-30 2002-05-14 Deep Oil Technology Incorporated Universal catenary riser support
US6371697B2 (en) * 1999-04-30 2002-04-16 Abb Lummus Global, Inc. Floating vessel for deep water drilling and production
ES2252026T3 (es) * 1999-07-08 2006-05-16 Deepwater Marine Technology L.L.C. Subestructura compacta de plataforma de cables tensados.
US6422791B1 (en) * 2000-04-04 2002-07-23 Abb Vetco Gray Inc. Riser to sleeve attachment for flexible keel joint
US6431284B1 (en) * 2000-10-03 2002-08-13 Cso Aker Maritime, Inc. Gimbaled table riser support system
US6648074B2 (en) * 2000-10-03 2003-11-18 Coflexip S.A. Gimbaled table riser support system
US6688250B2 (en) * 2001-08-06 2004-02-10 Seahorse Equipment Corporation Method and apparatus for reducing tension variations in mono-column TLP systems

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004077951A2 *

Also Published As

Publication number Publication date
BRPI0408048A (pt) 2006-02-14
JP2006519137A (ja) 2006-08-24
WO2004077951A3 (fr) 2005-06-16
WO2004077951B1 (fr) 2005-08-04
CN1777532A (zh) 2006-05-24
AU2004218479A1 (en) 2004-09-16
WO2004077951A2 (fr) 2004-09-16
US20040182297A1 (en) 2004-09-23
CA2517365A1 (fr) 2004-09-16
KR20050109516A (ko) 2005-11-21

Similar Documents

Publication Publication Date Title
EP2726362B1 (fr) Plateforme en mer à colonnes à déport externe
US8083439B2 (en) Riser support system for use with an offshore platform
US20040182297A1 (en) Riser pipe support system and method
US6309141B1 (en) Gap spar with ducking risers
US6263824B1 (en) Spar platform
US8707882B2 (en) Offshore platform with outset columns
US8251005B2 (en) Spar structures
US6666624B2 (en) Floating, modular deepwater platform and method of deployment
US6884003B2 (en) Multi-cellular floating platform with central riser buoy
WO1987001748A1 (fr) Caisson de forage, de production et de stockage de petrole pour eaux profondes
WO2009111767A1 (fr) Structure flottante au large avec amortisseurs de mouvement
US6854933B2 (en) Vertically restrained centerwell SPAR
US6688250B2 (en) Method and apparatus for reducing tension variations in mono-column TLP systems
US9352808B2 (en) Offshore platform having SCR porches mounted on riser keel guide
MXPA05009213A (en) Riser pipe support system and method
OA16697A (fr)
WO2000048898A1 (fr) Sous-structure flottante avec systeme de lestage

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20050905

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SEA ENGINEERING ASSOCIATES INC.

Owner name: MODEC INTERNATIONAL, L.L.C.

DAX Request for extension of the european patent (deleted)
RIN1 Information on inventor provided before grant (corrected)

Inventor name: WU, SHAKAI

Inventor name: WYBRO, PIETER, G.

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20100803