ZA200402782B - Achieving hydrostatic stability of a floating structure. - Google Patents
Achieving hydrostatic stability of a floating structure. Download PDFInfo
- Publication number
- ZA200402782B ZA200402782B ZA200402782A ZA200402782A ZA200402782B ZA 200402782 B ZA200402782 B ZA 200402782B ZA 200402782 A ZA200402782 A ZA 200402782A ZA 200402782 A ZA200402782 A ZA 200402782A ZA 200402782 B ZA200402782 B ZA 200402782B
- Authority
- ZA
- South Africa
- Prior art keywords
- platform
- pontoons
- buoyancy means
- hull
- installation
- Prior art date
Links
- 230000002706 hydrostatic effect Effects 0.000 title claims description 11
- 238000009434 installation Methods 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 230000000153 supplemental effect Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 10
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 208000001970 congenital sucrase-isomaltase deficiency Diseases 0.000 claims 1
- 210000002435 tendon Anatomy 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000007704 transition Effects 0.000 description 5
- 238000005553 drilling Methods 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 239000003643 water by type Substances 0.000 description 3
- 238000009428 plumbing Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- 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
-
- 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
- B63B21/56—Towing or pushing equipment
- B63B21/62—Towing or pushing equipment characterised by moving of more than one vessel
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B43/00—Improving safety of vessels, e.g. damage control, not otherwise provided for
- B63B43/02—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking
- B63B43/10—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving buoyancy
- B63B43/14—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving buoyancy using outboard floating members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
- B63C7/00—Salvaging of disabled, stranded, or sunken vessels; Salvaging of vessel parts or furnishings, e.g. of safes; Salvaging of other underwater objects
- B63C7/06—Salvaging of disabled, stranded, or sunken vessels; Salvaging of vessel parts or furnishings, e.g. of safes; Salvaging of other underwater objects in which lifting action is generated in or adjacent to vessels or objects
- B63C7/10—Salvaging of disabled, stranded, or sunken vessels; Salvaging of vessel parts or furnishings, e.g. of safes; Salvaging of other underwater objects in which lifting action is generated in or adjacent to vessels or objects using inflatable floats external to vessels or objects
-
- 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
- B63B2001/044—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with single hull with a small waterline area compared to total displacement, e.g. of semi-submersible type
-
- 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
- B63B2021/505—Methods for installation or mooring of floating offshore platforms on site
-
- 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
- B63B2035/4486—Floating storage vessels, other than vessels for hydrocarbon production and storage, e.g. for liquid cargo
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B2221/00—Methods and means for joining members or elements
- B63B2221/02—Methods and means for joining members or elements by welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B2221/00—Methods and means for joining members or elements
- B63B2221/20—Joining substantially rigid elements together by means that allow one or more degrees of freedom, e.g. hinges, articulations, pivots, universal joints, telescoping joints, elastic expansion joints, not otherwise provided for in this class
- B63B2221/22—Joining substantially rigid elements together by means that allow one or more degrees of freedom, e.g. hinges, articulations, pivots, universal joints, telescoping joints, elastic expansion joints, not otherwise provided for in this class by means that allow one or more degrees of angular freedom, e.g. hinges, articulations, pivots, universal joints, not otherwise provided for in this class
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Description
METHOD AND APPARATUS FOR ACHIEVING HYDROSTATIC STABILITY
OF A FLOATING STRUCTURE WHILE BALLASTING
’ BACKGROUND OF THE DISCLOSURE . The present invention relates generally to floating platform systems for testing and producing hydrocarbon formations found in offshore waters. More particularly, the invention relates to a method and system for achieving hydrostatic stability of a floating structure while ballasting during installation of the structure.
The exploration for oil and gas deposits in offshore waters, and recovery of the oil and gas therefrom is very expensive. Various methods and offshore production systems have been utilized to locate and recover offshore oil and gas deposits. Exploration and production systems such as converted Mobile Offshore Drilling Units (“MODU™), Tendon Leg Platforms (TLP) and other floating structures typically used in offshore waters are very expensive to manufacture and install.
Installation of an offshore platform, such as a TLP, may require that the platform hull be wet towed to the installation site. The hull of a single column TLP comprises the central column and a plurality of pontoons extending radially outwardly from the central column. The hull of a single column TLP is quite stable floating on the pontoons because of the large water plane area provided by the central column and pontoons. During installation, the hull is ballasted down for connection to a plurality of tendons which anchor the hull to the seabed. As the hull is ballasted down, the hydrostatic stability of the hull decreases significantly after the pontoons submerge. : To reduce stability problems during installation, the hull is typically installed without the deck and with a stabilizing upward force applied at the top of the hull as it is ballasted down to connect with the pre-installed tendons. This stabilizing force is typically supplied by a derrick barge. After the hull is lowered, connected to tendons and deballasted, the system is very stable.
The deck may then be lifted using the derrick barge and safely set on the platform hull.
For some offshore platform installations, it may be very advantageous commercially to utilize an installation alternative that eliminates the need for the expensive derrick barge during hull and deck installation. One such installation method. would for example. include installing ‘ 5 thedeck onthe hull ina less exposed, shallower water location with less expensive lifting means, wet-towing the hull-deck assembly to the installation site, and safely lowering the hull-deck assembly and connecting it to pre-installed tendons without using a derrick barge.
It is therefore an object of the present invention to provide a method of installing an offshore floating platform without using a derrick barge.
It is a further object of the present invention to provide a method of installing a floating platform including the steps of assembling the complete hull, deck and most production equipment at or near the fabrication site; wet towing the assembled platform to the installation site; and ballasting down the assembled platform to tendon connection draft without a derrick barge.
It is a further object of the present invention to provide a method of installing a floating platform by providing hydrostatic stability for the hull of the platform at all drafts through the use of supplemental buoyancy.
In accordance with a preferred embodiment of the present invention, a floating platform includes a hull and a deck mounted on the uppermost end of the hull. A plurality of pontoons extend radially outwardly from the lower end of the hull. The platform is anchored to the seabed . by a plurality of tendons connected to the hull at the upper ends thereof and secured to the seabed at the lower ends thereof. The platform includes detachable ballast means providing supplemental buoyancy for hydrostatically stabilizing the platform without utilizing a derrick barge while ballasting the platform during installation. . '
.
So that the manner in which the above recited features, advantages and objects of the present invention are attained can be understood in detail. a more particular description of the invention briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings.
It is noted, however, that the appended drawings illustrate only typical embodiments of this invention and are therefore not to be considered limiting of its scope, for the invention may admit to other equally effective embodiments.
Fig. 1 1s a side view of the floating platform of the invention illustrating the platform being wet towed to the installation site;
Fig. 2 is a side view of the floating platform of the invention illustrating ballasting the platform and depicting the pontoons submerged below the water line;
Fig. 3 is a side view of the floating platform of the invention illustrating the platform at full installation draft and full deployment of the detachable ballast means providing supplemental buoyancy;
Fig. 4 is a partial exploded view of the detachable ballast means of the invention;
Fig. 5 is top plan view of the buoy support frame of the detachable ballast means of the invention; .
Fig. 6 is a top plan view of the floating platform of the invention depicting an alternate ‘ embodiment of a supplemental ballast means of the invention; and
Fig. 7 is a side view of the floating platform of the invention shown in Fig. 6.
Referring first to Fig. 1, the floating platform of the invention is generally identified by , the reference numeral 10. The platform 10 includes a hull 12 which provides positive buoyancy and vertical support for the platform 10. The hull 12 comprises a central column 13 and pontoons 18 extending radially outwardly from the lower end of the central column 13. One or more decks 14 are sunported on the central column 13 above the water surface 16. Drilling and/or production equipment necessary for the recovery and processing of oil, gas and water recovered from the oil and gas field are secured on the deck 14.
The central column 13 extends upward from the base or keel of the platform 10. The base node of the platform 10 is at the intersection of the central column 13 and the pontoons 18 extending radially outwardly therefrom. The platform 10 is anchored to the seabed by tendons 20 secured at one end thereof to the pontoons 18, as shown in Fig. 3, and at the opposite ends thercof to foundation piles (not shown in the drawings) embedded in the seabed. The hull 12 provides sufficient buoyancy to support the payload of the platform 10; which payload includes the deck 14, drilling and/or completion equipment, production facilities, production and drilling risers; and sufficient excess buoyancy to develop the tendon pre-tension.
Referring still to Fig. 1, the hull 12, including the deck 14 mounted on top of the central column 13, is towed to the installation site and maneuvered over tendons 20 which have been pre-installed and connected at the lower ends thereof to foundation piles embedded in the seabed.
In the configuration shown in Fig. 1, the hull 12 and deck 14 mounted thereon are stable floating on the pontoons 18 because of the large water plane area provided by the pontoons 18. The assembled hull 12 and deck 14, however, is unstable at drafts where the pontoons 18 are fully ‘ submerged below the water line 16. At full installation draft, the assembled hull 12 and deck 14 may be unstable until the tendons 20 are connected to the pontoons 18. In the final installed .
configuration of the platform 10, the tendons 20 provide stability.
Referring now to Figs. 2 and 3, upon positioning the platform 10 over the tendons 20, \ it is ballasted down for connection to the upper ends of the tendons 20. The hydrostatic stability of the platform 10 is maintained by supplemental buoyancy added to the ends of the pontoons « 18 to provide additional water plane area and righting moment. For the sake of convenience, only one secondary hnoyancy assembly ie chown mounted on the nontoons 18. Tt ie understand however that the platform 10 of the inventions includes a secondary or supplemental buoyancy assembly mounted to the distal ends of each of the pontoons 18.
The secondary buoyancy assembly includes a transition structure 22 releasably connected to the distal ends of the pontoons 18. Any number of releasable connection means may be utilized to securely mount the transition structure 22 to the pontoons 18. In a preferred embodiment shown in Fig. 4, brackets 24 provided on the pontoons 18 are adapted for mating engagement with padeyes 26 provided on the transition stiucture 22. A connector pin 23 inseried through the aligned brackets 24 and padeyes 26 fixedly secures the transition structures 22 to the distal ends of the pontoons 18. ‘The secondary buoyancy assembly further includes a floodable hard tank 28 welded or otherwise mounted on top of the transition structure 22. The hard tank 28 is provided with the necessary plumbing, including a fill port 30 and vent 32, for connection with the ballast system of the marine installation equipment.
Referring still to Figs. 4 and 5, an assembly of buoys 34 is pivotally connected to a buoy support post 36 secured to top of the hard tank 28. The buoys 34 are assembled on a buoy support frame 38 secured to the support post 36. As the pontoons 18 submerge, the buoys 34 are drawn ’ into the water to provide the additional water plane area for maintaining the hydrostatic stability of the platform 10 as it is ballasted down for connection to the tendons 20. Commercially available buoyancy elements, such as Yokohama fenders, are suitable to provide the additional water plane area required to maintain hydrostatic stability. , Referring again to Fig. 1, it will be observed that before the hull 12 is ballasted down to the point where the pontoons 18 are submerged, the buoys 34 rest on top of the pontoons 18. ) 5 Environmental conditions, such as rough seas, at the installation site may present additional difficulties when ballasting down the platform 10. Rough seas may cause the buoys 34 to repeatedly hit the pontoons 18 due to wave action as they submerge below the water line 16. To ameliorate this condition, a lift line 40 may be connected to an end of the buoy support frame 38 for pulling the buoy assembly to a controlled position off and above the pontoons 18. A linkage assembly, formed by a tri-plate 41 and linkage lines 43, connects the lift line 40 to padeyes and shackle and pin connectors 45 secured to the buoy support frame 38. The lift line 40 passes over a sheave 42 mounted on the deck 14 and the opposite end thereof is attached to a winch 44 mounted on top of the central column 13 of the hull 12. In such a configuration, the winch 44 is operated as needed to lift the buoys 34 upwardly and off the pontoons 18 as the platform 10 is ballasted down. As the platform 10 is lowered to its full installation draft, the buoys 34 pivot to a substantially vertical orientation and provide the necessary distributed buoyancy to maintain the hydrostatic stability of the platform 10.
As the hull 12 is ballasted down and after the floodable hard tank 28 is immersed (after the assembly of buoys 34 is pulled up with the lift line 40), but before the first buoy 34 starts to submerge, a “buoyancy gap” may occur. To minimize the effect of such a buoyancy gap, the buoy support frame 38 is connected to the buoy support post 36 by a synthetic rope 37, shown in Fig. 4, which is specified as short as possible. Alternatively, a short bar with a swivel on both ' ends may be substituted for the synthetic rope 37.
Upon reaching the installation draft of the platform 10, the tendons 20 are connected to the pontoons 18 and the platform 10 is deballasted to develop the tendon pre-tension required . to provide stability to the platform 10. The secondary buoyancy assemblies mounted on the distal ends ofthe pontoons 18 are then filled with seawater and detached from the ends ofthe pontoons ) 5 18 and removed from the platform 10.
Referring now to Figs. 6 and 7, an alternate embodiment of the platform 10 of the invention is shown. In the alternate embodiment of the invention, the secondary ballast assemblies are permanently secured to the pontoons 18. The secondary ballast assemblies comprise elongated buoys 50 pivotally connected to brackets 52 welded or otherwise secured to the top surfaces of the pontoons 18 near the distal ends thereof. The buoys 50 include the necessary plumbing, including a fill port and vent, for connection with the ballast system of the marine platform installation equipment. The buoys 50 operate similar to the buoys 34 previously described herein. As the platform 10 is ballasted to its installation draft, the buoys 50 are drawn into the water and float upwardly to a vertical orientation to provide the necessary water plane area for maintaining the hydrostatic stability of the platform 10. This alternate embodiment of the invention may also include the lift line and winch option to control slamming of the buoys 50 on the pontoons 18 in heavy seas.
While a preferred embodiment of the invention has been shown and described, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims which follow. ’ ¢ -7- 3
Claims (9)
1. A floating platform coraprising: a) a hull supporting one or more decks in a body of water above the water line; b) said hull including buoyancy means for supporting said one or more decks of said platform above the water line, said buoyancy means including pontoons extending radially outwardly from said hull; and . ¢) supplemental buoyancy means secured on the distal ends of said pontoons for stabilizing said platform while ballasting down to the installation draft of said platform.
2. The platform of claim 1 wherein said supplemental buoyancy means comprises a floodable tank mounted on the distal ends of said pontoons and a buoy assembly pivotally connected to said floodable tank.
3. The platform of claim 1 wherein said supplemental buoyancy means is detachably connected to said pontoons.
4, The platform of claim 2 including a winch and lift line operatively connected to said buoy N assembly for lifting an end of said buoy assembly upwardly above said pontoons.
5. The platform of claim 1 wherein said supplemental buoyancy means comprise elongated buoys pivotally connected to said pontoons.
6. The platform of claim 1 including a winch and lift line operatively connected to said supplemental buoyancy means for lifting an end thereof upwardly above said pontoons. .
7. A method of installing a floating platform, comprising the steps of: 8 Aciudep SHEET PAGE 3/4 * RCVD AT 8127/2004 12:53:52 AM [Eastern Daylight Time] * SVR:USPTO-EFXRF-210 * DNIS:7465092* CID:2814805510 * DURATION {mm-55):00-58
TR SE hw im FEE PER RE OES 88/27/2084 0B: 82 2819865511 NICK NICHOLS PAGE 04/84 a) wet towing said platform to an installation site; ¢ b) ballasting down said platform to zn installation draft without the use of a derrick barge; c) providing supplemental buoyancy means for maintaining the hydrostatic stability of said platform while ballasting down to the installation draft of said platform; and d) connecting said platform to anchor means for securing said platform at the installation site.
8. The method of clajm 7 including providing a winch and lift line operatively connected to said ve ; supplemental buoyancy means for lifting an end thereof upwardly while ballasting down said platform to the installation draft of said platform.
9. The method of claim 7 including removing said supplemental buoyancy means from said platform after securing said platform to said anchor means. ] vy ’ : 9- PAGE 4/4 * RCVD AT 8/27/2004 12:53:52 AM [Eastern Daylight Time] * SVR:USPTO-EFXRF-2/0 * DNIS: 7465092 * CSID:2818305510 * DURATION fram-5s):00-58 AMEHIDED STEST
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US32794501P | 2001-10-09 | 2001-10-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA200402782B true ZA200402782B (en) | 2005-05-12 |
Family
ID=35160924
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA200402782A ZA200402782B (en) | 2001-10-09 | 2004-04-08 | Achieving hydrostatic stability of a floating structure. |
Country Status (4)
Country | Link |
---|---|
KR (1) | KR20050034601A (en) |
CN (1) | CN100465064C (en) |
AU (1) | AU2002335802B2 (en) |
ZA (1) | ZA200402782B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101681710B1 (en) * | 2012-02-07 | 2016-12-13 | 대우조선해양 주식회사 | Semi-submersible marine structure |
WO2014015363A1 (en) * | 2012-07-27 | 2014-01-30 | Nautilus Minerals Pacific Pty Ltd | A method of subsea testing using a remotely operated vehicle |
CN107101882B (en) * | 2016-02-23 | 2019-09-03 | 烟台中集来福士海洋工程有限公司 | A kind of method of machine utilization test |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3996754A (en) * | 1973-12-14 | 1976-12-14 | Engineering Technology Analysts, Inc. | Mobile marine drilling unit |
US3983706A (en) * | 1975-07-10 | 1976-10-05 | Texaco Inc. | Marine structure with hydraulic tensioner |
US3955521A (en) * | 1975-08-11 | 1976-05-11 | Texaco Inc. | Tension leg platform with quick release mechanism |
GB9424930D0 (en) * | 1994-12-09 | 1995-02-08 | Kazim Jenan | Marine system which retains hydrostatic stability even when fully submerged |
US5567086A (en) * | 1994-12-23 | 1996-10-22 | Shell Oil Company | Tension leg caisson and method of erecting the same |
US5964550A (en) * | 1996-05-31 | 1999-10-12 | Seahorse Equipment Corporation | Minimal production platform for small deep water reserves |
ATE313479T1 (en) * | 1999-07-08 | 2006-01-15 | Abb Lummus Global Inc | SUBSTRUCTURE WITH WIDED BASE FOR A PLATFORM ANCHORED WITH TENSIONING ELEMENTS |
-
2002
- 2002-10-09 AU AU2002335802A patent/AU2002335802B2/en not_active Ceased
- 2002-10-09 KR KR1020047005266A patent/KR20050034601A/en not_active Application Discontinuation
- 2002-10-09 CN CNB028200063A patent/CN100465064C/en not_active Expired - Fee Related
-
2004
- 2004-04-08 ZA ZA200402782A patent/ZA200402782B/en unknown
Also Published As
Publication number | Publication date |
---|---|
CN1753811A (en) | 2006-03-29 |
KR20050034601A (en) | 2005-04-14 |
CN100465064C (en) | 2009-03-04 |
AU2002335802B2 (en) | 2008-08-21 |
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