Well-riser Repair Collar with Concrete Seal

摘要

The present invention is a device suitable for capture and containment of oil and gas wells following blowouts or other catastrophic failures, including those in submarine environments, and methods for its construction. The present invention provides a structurally-robust repair collar with integrated locking elements capable of engaging a riser pipe assembly, and an internal structure allowing in situ formation of an impermeable permanent seal through the introduction of liquid concrete into the device. The repair collar can provide means for attaching valves and various other downstream components in order to return pre-blowout functionality to the repaired riser, including oil recovery and flow control capability.