Wireline tensioner systems
•	The primary purpose of a drilling riser tensioner system is to apply relatively constant tension to a drilling riser and to compensate for movement of the rig due to environmental forces contributing to heave, rolling and pitching.
•	The system consists of multiple tension cylinders with high-pressure and low-pressure piston accumulators.
•	Third-party certification of systems according to ABS or DNV requirements.
•	Wire-pull capacity up to 250 Kips.
•	Clover Industries is experienced in the design and production of wire line tensioner systems to meet the customer’s specific requirements.
Crown-mounted compensator systems
•	Allows for drill string compensation to be crown-mounted.
•	Weight savings when compared to traditional drill string compensators.
•	Compression system involving integrated cylinder and piston accumulator.
•	Cushioning capabilities designed into the system.
•	Third-party certification of systems according to ABS or DNV requirements.
Other tensioner systems
•	Drill string compensator systems
•	Active heave compensator systems
•	Jacking systems
•	Clover also has capabilities to design and produce other tensioner systems. Contact us for additional information.
Oil & Gas industry — land-based applications
•	Telescopic and single-stage cylinders that raise and lower the mast and drill floor on land-based drilling rigs.
•	Cylinder systems, including cylinders, hydraulic power units, control panels and specialized diagnostic repair services for land-based rigs.

Military and defense applications
Our service record is exemplary. Meeting the needs of military and defense contractors involves a great deal of feasibility study and R&D work performed by Clover’s own people. Many of the projects Clover has assisted with involve proprietary applications, such as a portable antenna mast deployment system, enclosed field command and control centers with motion control systems, and cylinders utilized in mine detection equipment. Clover is also capable of providing hydraulic cylinders and systems for heavy-rig moving equipment, mast cylinders for submarines and more. View a press release from the office of U.S. Congressman Dave Obey of Wisconsin announcing Clover projects on behalf of the U.S. Army to produce components for mobile shelter units and lightweight antenna mast system, and Clover’s contribution to a U.S. Air Force cargo loader project.

Custom applications for other industries
Clover is ready to address the needs of any customer in any industry where innovative solutions for loading, handling, functioning and environmental challenges need to be met. Contact us for the help you need.