Using a vane-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 together by simply unbolting and pulling it down off the stem. We want you to keep your hydraulic oil clean, but we understand the challenge, and this hydraulic motor eats dirt well. Regardless, there is excellent filtration on the pump to keep the oil clean.

The XK-90 also has unique lubrication and sealing features. Lower shaft bearings are pressure-lubricated with hydraulic oil, dual upper seals are pressure-greased, and all seals run on hardened and ground wear bushings to prevent stem wear and corrosion.

Our washpipes and packing are designed for long life, and have no holes through their wall that can leak wellbore fluid. Another special feature is that the packing cartridge may be installed either way. When installed upside down with the main packing nut on top and non-rotating, the packing may be greased while drilling with an air-powered greasing system. This can extend packing life dramatically during difficult drilling situations.

Our lifting device is an elevator bail on the XK-90. Standard torque reaction arrangement uses one telescoping torque arm, which is designed with wire rope sheaves for rolling contact with a wire rope tensioned between crown and floor.