Drilling riser adapter connection with subsea functionality

摘要

A drilling riser adapter variably connects and releases a riser from a subsea wellhead assembly. The drilling riser adapter has a hydraulically actuated engagement assembly for selectively engaging and disengaging a lower end of the marine riser. The drilling riser adapter also includes a control panel communicatively coupled to the engagement assembly for actuating the engagement assembly to engage and disengage the lower end of the marine riser. The drilling riser adapter also includes a hydraulic fluid pressure receptacle on the control panel for engagement by a remotely operated vehicle to supply hydraulic fluid pressure to the engagement assembly. The drilling riser adapter may be actuated subsea to release a first riser from the wellhead assembly, and connect to a second riser.

主权项

1. A system for connecting a lower marine riser package to a marine riser, the lower marine riser package (LMRP) to be placed subsea at a wellhead so that the riser will extend from the LMRP to a drilling rig located at a sea surface, the system comprising:
a drilling riser adapter for mounting to the lower marine riser package and having a hydraulically actuated engagement assembly for selectively engaging and disengaging a lower end of the marine riser; a crossover riser joint having a lower end profile selectively mated with the engagement assembly when the engagement assembly is in an engaged state, and an upper end connection assembly selectively connected to the riser; a control panel mounted to the adapter and communicatively coupled to the engagement assembly for actuating the engagement assembly to engage and disengage the lower end of the marine riser; and a receptacle for receiving hydraulic fluid pressure on the control panel for engagement by a remote operated vehicle (ROV) to supply hydraulic fluid pressure to the engagement assembly.