The WellSafe Installer is a passive weak link system for “locked to bottom” operations using drillpipe from semi-submersibles. Typical applications include installation and retrieval of x-mas tree’s using drillpipe and installation of subsea casing hangers, tubing hangers. In case of a compensator lock scenario, the tool will separate at a pre-set tension force preventing fatal accidents, severe damage to subsea and rig equipment, and non-productive time.
The WellSafe Installer can be set in strong mode (typical same strength as the DP) during installation, and can be remotely operated to “WeakLink” mode when locked to bottom.
The Casing Landing Assembly (CLA) minimizes the time the casing string is stationary in the open hole area, to prevent stuck casing and safely landing of the casing hanger into the subsea wellhead.
The CLA has a working stroke which allows the casing hanger to be landed in the well head while the top is still attached to the rig elevators, acting as a passive heave arrestor. Any heave that is present will be accommodated by the stroke allowing the top to be set in slips while rigging up the cement head and connecting hoses at normal working height. The tool is then fully extended to enable circulation through the string and to proceed with normal cementing operation. The CLA has proven to save up to 5 rig hours per well section during a standard casing/cementing operation.
WellSafe Explorer is a safety device designed to prevent major incidents during “locked to bottom” operations from a floating drilling vessel. It is applicable for exploration well testing, wireline intervention, well clean up and completion operations.
• Over tension protection system
• Can be turned on and off
• Strong mode during rig up and landing
• Weak mode in “locked to bottom”
• Adjustable weak mode setting point
• Tension system activates on over tension
WellSafe Explorer is compliant with existing rig handling systems, requires no interference to personnel in compensator lock events and protects the well control equipment from accidental tension and compression loads.