SYSTEM WITH A GUIDE FRAME FOR PETROLEUM PRODUCTION RISERS; A GUIDE FRAME FOR RISERS; RISER BUOYANCY ELEMENTS AND A SEMI-SUBMERSIBLE PRODUCTION PLATFORM - Patent 1163422

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EP 1 163 422 A1

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(43)	Date of publication:
	19.12.2001 Bulletin 2001/51

(21)	Application number: 00915595.3

(22)	Date of filing: 23.03.2000

(51)	International Patent Classification (IPC)⁷: E21B 19/24

(86)	International application number:
	PCT/NO0000/106

(87)	International publication number:
	WO 0058/598 (05.10.2000 Gazette 2000/40)

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV MK RO SI

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Priority:

25.03.1999 NO 991470

(71)	Applicant: PGS Offshore Technology AS
	1324 Lysaker (NO)

(72)	Inventors:
	B RSETH, Knut N-1413 T rn sen (NO) OFTEN, Ola N-1368 Stabekk (NO)

(74)	Representative: Rackham, Stephen Neil et al
	GILL JENNINGS & EVERY, Broadgate House, 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)

(54)	SYSTEM WITH A GUIDE FRAME FOR PETROLEUM PRODUCTION RISERS; A GUIDE FRAME FOR RISERS; RISER BUOYANCY ELEMENTS AND A SEMI-SUBMERSIBLE PRODUCTION PLATFORM