Method and apparatus for drilling a plurality of offshore underwater wells
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United States of America Patent
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Dec 24, 2002
Grant Date -
N/A
app pub date -
Mar 24, 1999
filing date -
Mar 27, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
An underwater well system in which an initially vertical drilling riser conduit (5A) is fixed by a template at the seabed in a non-vertical orientation. Drilling is carried out through wellhead in the template which also includes a valve tree 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 to further templates such that a wide area of the seabed can be covered for a single drilling riser conduit.
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