Patent ID: 8881828
Filing Date: 2014-11-11
Classification: E21B

Abstract:
1. A bore selector for coupling a monobore riser to a dual bore subsea installation,the bore selector comprising: a lower base part comprising a first through bore connected to a first bore of the dual bore subsea installation and a second through bore connected to a second bore of the dual bore subsea installation; an upper selector part comprising a through bore connected to a bore of the monobore riser, the upper selector part is movable in relation to the lower base part to and fro between a first position, wherein in the first position the through bore of the upper selector part is aligned with and connected to the first through bore of the lower base part, and a second position, wherein in the second position the through bore of the upper selector part is aligned with and connected to the second through bore of the lower base part; an actuator configured to move the upper selector part in relation to the lower base part between the first position and the second position; and a connector sleeve slidably mounted in the through bore of the upper selector part, wherein the connector sleeve is configured to selectively engage with the first through bore and the second through bore of the lower base part, the connector sleeve is movable in an axial direction of the through bore of the upper selector part to and fro between a raised position, wherein in the raised position a lower end of the connector sleeve is received in the through bore of the upper selector part, and a lowered position, wherein in the lowered position the lower end of the connector sleeve projects beyond the lower end of the through bore of the upper selector part and is received in one of the first through bore and the second through bore of the lower base part.