A deepwater floating drilling and production facility incorporating flexible production risers

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(11)

EP 0 250 069 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	29.03.1989 Bulletin 1989/13

(43)	Date of publication A2:
	23.12.1987 Bulletin 1987/52

(21)	Application number: 87303005.0

(22)	Date of filing: 07.04.1987

(51)	International Patent Classification (IPC)⁴: E21B 7/128, E21B 43/01, B63B 35/44

(84)	Designated Contracting States:
	DE FR GB IT NL

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Priority:

20.06.1986 US 876576

(71)	Applicant: CONOCO INC.
	Ponca City Oklahoma 74603 (US)

(72)	Inventor:
	Hunter, Andrew F. Houston, Texas 77095 (US)

(74)	Representative: Davies, Christopher Robert et al
	Frank B. Dehn & Co., European Patent Attorneys, 179 Queen Victoria Street London EC4V 4EL London EC4V 4EL (GB)

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References cited: :

(54)	A deepwater floating drilling and production facility incorporating flexible production risers

(57) A method of using a floating platform (12) in deep (1000-3000 feet) water as a drilling/workover and production platform. By interconnecting the subsea wellheads of at least one template (16) to the platform using flexible production risers (26) connected through a reverse loop, the platform may be adjusted on its moorings to position the platform directly over a second template (18) for subsequent drilling or workover. This eliminates the need for separate drilling platforms and workboats. Further, wells of separate templates can be serviced separately and the entire field production need not be completely curtailed during such a workover.

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