Our Mastiff™ rigless intervention system (RIS) helps you perform efficient intervention operations without the need for a rig. The system’s versatility enables you to use it for multiple needs, including conductor pre-installation, workovers, and well abandonment. Regardless of the application, the Mastiff RIS provides you with easier setup, quicker transport, and more reliable operations to boost your efficiency.


Specific customizable operations made possible

It’s mobile.

The system can be easily transported globally, with each section fitting in a standard 40-ft (12-m) open-top container. When on location, it can be rigged up or down in less than a day, saving significant rig time.

It’s modular.

Made up of modular sections, the Mastiff RIS can be configured to weigh 131 tons (119 tonnes)—a great advantage for platforms with limited deck capacity. It can be customized to your specific operations to maximize efficiency, like placing it on capping beams to simplify operations on fixed or spar platforms. The system also features a self-elevating, self-pinning design that helps reduce work at height and related health safety and environmental (HSE) risks.

It’s mighty.

With the Mastiff RIS, you are able to cut and pull 50-ft (15-m) sections in a single lift, significantly speeding up the abandonment process compared to casing jacks, which typically can only handle 6-ft (1.8-m) sections. With a 352-ton (319-tonne) pulling capacity, the RIS can easily handle pipe up to 36-in. (914-mm) outside diameter (OD). This is especially valuable when conductor strings are barnacle-encrusted or cemented together.


  • Rigless operations
  • Conductor pre-installations
  • Workover jobs
  • Plug and abandonment (P&A)

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