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1. WO1997029948 - TENSION-LEG PLATFORM BUOYANCY RING

Publication Number WO/1997/029948
Publication Date 21.08.1997
International Application No. PCT/NO1997/000042
International Filing Date 14.02.1997
Chapter 2 Demand Filed 20.08.1997
IPC
B63B 9/06 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
9Methods of designing, building, maintaining, converting, refitting, repairing, or determining properties of, vessels, not otherwise provided for
06Methods of building hulls
B63B 21/50 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
21Tying-up; Shifting, towing, or pushing equipment; Anchoring
50Anchoring arrangements for special vessels, e.g. for floating drilling platforms or dredgers
B63B 35/44 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
35Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
44Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
CPC
B63B 2001/044
BPERFORMING OPERATIONS; TRANSPORTING
63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
1Hydrodynamic or hydrostatic features of hulls or of hydrofoils
02deriving lift mainly from water displacement
04with single hull
044with a small waterline area compared to total displacement, e.g. of semi-submersible type
B63B 21/27
BPERFORMING OPERATIONS; TRANSPORTING
63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
21Tying-up; Shifting, towing, or pushing equipment; Anchoring
24Anchors
26securing to bed
27by suction
B63B 21/502
BPERFORMING OPERATIONS; TRANSPORTING
63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
21Tying-up; Shifting, towing, or pushing equipment; Anchoring
50Anchoring arrangements ; or methods; for special vessels, e.g. for floating drilling platforms or dredgers
502by means of tension legs
B63B 35/4413
BPERFORMING OPERATIONS; TRANSPORTING
63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
35Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
44Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
4413Floating drilling platforms, e.g. carrying water-oil separating devices
B63B 77/00
BPERFORMING OPERATIONS; TRANSPORTING
63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
77Transporting or installing offshore structures on site using buoyancy forces, e.g. using semi-submersible barges, ballasting the structure or transporting of oil-and-gas platforms
Applicants
  • PETROLEUM GEO-SERVICES A/S [NO]/[NO] (AllExceptUS)
  • BØRSETH, Knut [NO]/[NO] (UsOnly)
Inventors
  • BØRSETH, Knut
Agents
  • LARSEN, Rolf
Priority Data
08/602,66516.02.1996US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) TENSION-LEG PLATFORM BUOYANCY RING
(FR) ANNEAU DE FLOTTAISON POUR PLATE-FORME A CABLES TENDUS
Abstract
(EN)
A process and a device for generating a stabilizing moment, before a TLP platform is secured and tensioned to the sea floor, wherein the central axis of the TLP is vertically aligned; and reducing the size of the TLP in the wave zone, after a tendon of the platform is secured to the sea floor. A tension-leg platform (TLP) also comprising a buoyancy structure for floating the TLP at the sea surface; a platform for mineral production operations located above the sea surface; a support which connects at a lower end to the buoyancy structure and connects at an upper end to the platform; and a tendon which fixes the TLP to the sea floor. A process comprising: stabilizing the buoyancy-support with the float; ballasting the buoyancy-support until the buoyancy-support resides lower in the sea relative to the sea surface; and assembling the platform to the buoyancy-support.
(FR)
Une procédure et un dispositif permettant d'obtenir un moment de stabilisation avant qu'une plate-forme à câbles tendus ne soit fixée au fond de la mer et mise en tension, l'axe central de la plate-forme à câbles tendus étant aligné à la verticale; et de réduire la taille de ladite plate-forme dans la zone de houle après qu'un câble de la plate-forme ait été fixé au fond de la mer. Une plate-forme à câbles tendus comprenant également: une structure de flottaison destinée à maintenir ladite plate-forme à la surface de la mer; une plate-forme destinée à des opérations de production minérale située au-dessus de la surface de la mer; un support relié en sa partie inférieure à la structure de flottaison et en sa partie supérieure à la plate-forme; et un câble qui fixe la plate-forme à câbles tendus au fond de la mer. Une procédure comprenant: la stabilisation du support de flottaison au moyen d'un flotteur; le lestage du support de flottaison jusqu'à ce que ledit support se trouve sous la surface de la mer; et le raccordement de la plate-forme au support de flottaison.
Also published as
NO19983740
Latest bibliographic data on file with the International Bureau