The Grease Injection Control Head is designed to create a seal around a moving wireline, allowing intervention access to wells under pressure.
Positioned at the uppermost point of the pressure control equipment string, the Grease Injection Control Head comprises two major sub- assemblies, the stuffing box or pack-off and the flow tube assembly.
The stuffing box is designed to pack-off on a stationary wireline by means of a pack-off rubber energized by hydraulic pressure.