Global Patent Index - EP 0979921 A1

EP 0979921 A1 2000-02-16 - Method for installing an oil production installation

Title (en)

Method for installing an oil production installation

Title (de)

Verfahren zum Installieren einer Ölproduktionseinrichtung

Title (fr)

Procédé d'implantation d'une installation d'exploitation de pétrole

Publication

EP 0979921 A1 (FR)

Application

EP 99402018 A

Priority

FR 9810302 A

Abstract (en)

The platform (10) is anchored in the area of the deposit. The riser (24) is connected to reach a first point (30) on the seabed (F) from the platform and is then connected to the first point. The riser is then disengaged from the first point, keeping it submerged and its free end is moved to connect to a second point (32). The step of moving the free end of the riser involves the previous establishment of at least one fixed point (34a, 36a, 38a) on the seabed; positioning means of traction between the free end of the riser and the or each fixed point; and pulling the free end of the riser relative to the fixed point(s) to move it relative to the seabed to the second point. Three nonaligned fixed points are anticipated, so the riser moves under the action of three non coaxial forces. The free end of the riser is connected to at least one and preferably two moorings and the intervention points are in the area swept by the mooring or in the overlap between the two mooring circles. The fixed points and means of traction are established by a submersible engine, possibly during the anchoring of the platform.

Abstract (fr)

L'invention concerne un procédé d'intervention sur le fond marin (F) depuis l'extrémité libre d'une même colonne montante (24) issue d'une plate-forme semi-submersibie (10) adaptée pour l'exploitation d'un gisement, en un ensemble de points d'intervention distincts (30, 32). Il comporte des étapes successives suivantes : a) amarrer la plate-forme (10) pour l'immobiliser en flottaison au droit du gisement ; b) mettre en place la colonne montante (24) reliant la plate-forme (10) en flottaison au fond marin (F) pour l'intervention en un premier point d'intervention (30) ; c) intervenir au premier point d'intervention (30); d) dégager l'extrémité libre de la colonne montante (24) du premier point d'intervention (30), en maintenant celle-ci immergée; e) déplacer l'extrémité libre de ladite colonne montante (24) par rapport au fond marin (F) vers un second point d'intervention (32), en maintenant en place la plate-forme (10) en flottaison; et f) intervenir au second point d'intervention (32). <IMAGE>

IPC 1-7 (main, further and additional classification)

E21B 7/04; E21B 33/035; E21B 33/076

IPC 8 full level (invention and additional information)

E21B 7/04 (2006.01); E21B 33/076 (2006.01); E21B 41/10 (2006.01)

CPC (invention and additional information)

E21B 7/043 (2013.01); E21B 33/076 (2013.01); E21B 41/10 (2013.01)

Citation (search report)

Designated contracting state (EPC)

FI FR GB IE

EPO simple patent family

EP 0979921 A1 20000216; EP 0979921 B1 20040211; AU 4347899 A 20000302; AU 754692 B2 20021121; BR 9903615 A 20000905; CA 2280403 A1 20000211; CA 2280403 C 20071002; EA 001885 B1 20011022; EA 199900639 A2 20000228; EA 199900639 A3 20000828; FR 2782342 A1 20000218; FR 2782342 B1 20001110; ID 23248 A 20000330; NO 313894 B1 20021216; NO 993853 A 20000214; NO 993853 D0 19990810; US 6343655 B1 20020205

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