Method and apparatus for drilling a plurality of offshore...

Details Method and apparatus for drilling a plurality of offshore... Method and apparatus for drilling a plurality of offshore...

E - Fixed Constructions

21

B

E21B 7/12 (2006.01) E21B 7/04 (2006.01) E21B 17/01 (2006.01) E21B 23/08 (2006.01) E21B 23/12 (2006.01) E21B 33/043 (2006.01) E21B 33/064 (2006.01) E21B 34/04 (2006.01) E21B 43/013 (2006.01) E21B 43/017 (2006.01) E21B 43/30 (2006.01)

Patent

CA 2262243

An underwater well system in which an initially vertical drilling riser conduit (5A) is fixed by a template (7,13,15) at the seabed (6) in a non-vertical orientation. Drilling is carried out through wellhead (30) in the template which also includes a valve tree (28) allowing the production fluid to be brought to the surface along a line separate from the drilling riser conduit. The template may be a junction template allowing several wells to be drilled from a single template, or allowing the template to be connected by one or more drilling conduits (12,14) to further templates such that a wide area of the seabed can be covered for a single drilling riser conduit.

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