You can use our tutorials and sample data, or you can ask us to brand a set for you. Just about any. Data is accessed through the Earthworks data source drivers, for example SQL tables, spreadsheets, text files - and selected proprietary formats like Datamine binary tables. Downhole Explorer does not impose any particular database on you - you can use whatever corporate standard you have, or may change over to in the future. Assays and logs can be across multiple files.
Surveys can be separate or with collar data.
Downhole Explorer can deal with whatever data you have available. If you've only got collars you can still see where they are and annotate them in a collar plot. If you've no collars or surveys but assays, litho or downhole logs you can still get log plots. Yes, any 3D data type supported by the Earthworks Data Source Drivers can be imported and displayed in plan, section and 3D views. Common formats include DXF, AutoCad DWG, ArcView and Wavefront.