Plug installation system including a tractor

摘要

A system for maneuvering a plug 28 in and out of a tubing hanger mounted to a subsea wellhead assembly includes a tractor 22 and an end effector 26 that are sheltered in a housing. A control cable 30 spools from a reel mounted on the housing and attaches to the tractor 22. The control cable 30 provides communication from a remotely operated vehicle (ROV) 45 to the tractor 22 and end effector 26 so that commands from the ROV 45 via the control cable control the tractor 22 and end effector 26. After the housing connects to the wellhead assembly, control signals from the ROV 45 activate the tractor 22 to drive the end effector 26 into the wellhead assembly and command the end effector to set the plug 28 in the tubing hanger, or to remove the plug 28 from the tubing hanger.