The drilling rigs use drilling mud (high density drilling fluid) to pack to drill column. The drilling mud is a mix of chemicals but there are three basic types; water based, diesel based, and synthetic oil based. The H-900-OMC unit is almost always used on synthetic oil based drilling mud or diesel based mud. Synthetic oil based drilling mud is the most common type to be used in the offshore rigs.
The end users use the drilling mud to pack the column so that no gas escapes during the drilling process as well as to transport the solids being removed and to lubricate the drill bit. The whole system has a fluid cycle that is run by the drilling mud pumps. The mud pumps keep a circulation flow down into the hole and back up with the solids from the drilling process. Typical drilling applications are listed by hole size and drill rates. That info would be part of a drilling solid waste management system.
The Solid Waste Management system would almost always include 3-6 shaker screens a cuttings dryer, two mid size decanter centrifuges, and related pumps and containers. The feed from the mud pumps would go over the shaker screens and be concentrated to 50-75% solids by mass and then fed to a H-900-OMC. The underflow from the unit would go to the decanter and be mixed with the underflow from the screens. A small portion of the decanter centrate is typically recycled into the unit feed to keep the material flowing and keep the screen openings flushed.
The feed would range from 2 cm to 40 um with a very wide distribution depending on the drill rates, drill bit type, and natural formation.
The typical slurry feed rate was 20-60 US tons/hr fed by progressive cavity pumps.