We integrated the various hydraulic systems like the mud circulation system, filtering and pump, as well as top drive, drill bit, blow out preventer and accumulator. This allows us to simulate in real-time the first meters of drilling. The geology is still a simple model, we are working on developing a accurate rate of peneration based on lithology, UCS, porosity, density, abrasiveness and permeability. The important coupling of the hydraulics, especially the mud circulation through the bit, and the flow of cuttings generated by the bit is fully realized. The transport of cuttings and their impact on hydraulic properties has been implemented.