Helix Well Ops (u.k.) Limited

Jonathan Paul Edwards

Alexander Jeffrey Burns

An apparatus () for coupling a monobore riser or lubricator system () to a dual bore () subsea well, the apparatus has a rotatable bore selector () within a housing (). The bore selector has at least one conduit () to provide through bore communication between the riser bore or lubricator () and selectively at least one or other of main () and annulus () bores in the dual bore () well. The bore selector in a first position connects the conduit between the riser or lubricator bore and the main bore, and in a second position connects the conduit between the riser or lubricator bore and the annulus bore. The rotatable selector can be offset or set at a tilt angle of up to &#xb1;5&#xb0; with respect to the length of the apparatus.

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West Perth, Australia

Jonathan Paul Edwards