RISER TENSIONING SYSTEM

摘要

The riser tensioning system (10) includes a tensioning ring (18) for secured engagement with the riser and plurality of hydraulic cylinders (12) extending between the tensioning ring and a floating platform. A gimbal mechanism (42) acts between the platform and the riser to allow the riser axis to tilt relative to the floating platform. One or more elongate torque transfer members (38) extend between the tensioning ring and the gimbal mechanism and allow axial movement of the tensioning ring and the riser with respect to the floating platform.

主权项

1. A riser tensioning system for tensioning a riser extending from a subsea wellhead to a floating platform, the riser tensioning system comprising:
a tensioning ring for secured engagement with the riser; a plurality of hydraulic cylinders each extending between the tensioning ring and the floating platform; a gimbal mechanism below the tensioning ring and acting between the platform and the riser and allowing the riser axis to tilt relative to the floating platform; and one or more elongate torque transfer members extending between the tensioning ring and gimbal mechanism, the one or more torque transfer members transferring riser torque from the tensioning ring through the gimbal mechanism and to the floating platform while allowing axial movement of the tensioning ring and the riser with respect to the floating platform.