Using a 5000 psi piston-type, hollow shaft hydraulic motor, the swivel stem is driven directly by a massive lubricated spline.
The only moving parts are the hydraulic motor, stem, and packing cartridge.
No gears are required, so motor speed is swivel speed - very low by hydraulic standards, and very good for long life. This also means service is easy, allowing the entire hydraulic drive including swivel shaft bearings and seals to be removed by simply unbolting and pulling it up off the stem.
The XK-250 also has unique lubrication and sealing features. Upper shaft bearings and seals are pressure-lubricated with hydraulic oil, and all seals run on hardened and ground wear bushings to prevent stem wear and corrosion.
The XK-250 packing cartridge is installed with the big packing nut on top and non-rotating. This allows the non-rotating packing to be greased while drilling with an air-powered greasing system. This can extend packing life dramatically during difficult drilling situations.
The XK-250 is sold without torque reaction components to customers installing in their mast with their own torque reaction arrangement.
Available lifting devices include our Cobrahook™ link hooks, which allow wireline lubricator access to the gooseneck top connection for horizontal drilling work. Custom lifting devices can be made to coordinate with customer's requirements.
