E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 17/01 (2006.01)
Patent
CA 2321073
A riser pipe construction (5) for a drilling connection from a drilling vessel (1) to a valve (6) previously provided on a sea floor (8) comprises a riser pipe through which drilling means can be passed by means of which an oil well can be drilled, as welll as pressure pipes (11) extending along the riser pipe to operate the valve, and floating elements disposed around the riser pipe and the pressure pipes to limit the load on the drilling vessel. The riser pipe and the pressure pipes are built up from modules capable of being coupled to-gether. The floating elements are formed by steel tubular chambers closed so as to be gastight, disposed around the relevant modules and firmly connected thereto. The invention also relates to a riser pipe mod-ule.
L'invention concerne une structure (5) de tube goulotte destinée à constituer un raccordement de forage entre un engin de forage flottant (1) et une vanne disposée antérieurement sur un plancher océanique. La structure de tube goulotte comprend un tube goulotte par lequel on peut faire passer un appareil de forage destiné au forage d'un puits de pétrole; des tubes de pression (11) s'étendant le long du tube goulotte pour actionner la vanne; et des éléments de flottaison disposés autour du tube goulotte et des tubes de pression pour limiter la charge sur l'engin de forage. Le tube goulotte et les tubes de pression sont formés de modules capables d'être couplés. Les éléments de flottaison sont formés de compartiments tubulaires en acier fermés de manière à être étanches au gaz, disposés autour des modules correspondants auxquels ils sont solidement reliés. L'invention concerne également un module de tube goulotte.
Adviesbureau H. Van Der Poel
Borden Ladner Gervais Llp
Buitendijk Holding B.v.
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