OTC 2012: Baker Hughes introduces rigless intervention system

Offshore staff

HOUSTON – Baker Hughes has unveiled the Mastiff rigless intervention system (RIS) at the Offshore Technology Conference. The company says the new mechanized, self-pinning RIS provides operators an alternative method for carrying out pipe installation and retrieval operations.

With a maximum weight of 24,000 lbs (10,886 kg), each RIS module can be transported in a standard 40-ft (12-m) open-top container. The Mastiff RIS has a self-pinning mast erection system that improves safety and enables the unit to be rigged up or rigged down in 24 to 48 hours.

Hydraulics built into the system enable the modular components to be assembled and disassembled using a hydraulic, self-pinning design, eliminating the need for riding belt operations, and reducing risks associated with working at height and manual handling of components. The system’s mast enables safe operation at wind speeds of up to 50 mph (43.5 knots).

The system has a 352-ton pulling capacity. While performing conductor pipe removal, the Mastiff RIS can support cutting and pulling lifts of 50-ft (15-m) sections of 36-in conductor pipe, inner casing and cement.

As an alternative to well abandonment, the Mastiff RIS can be used to initiate a slot recovery program for continued field development prior to the arrival of the drilling rig. Once the pipe is removed, the well slot can be prepared for a new, full-sized wellbore using a range of equipment from drive-pipe whipstocks to hammer services.


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