porattava

Porattava is an adjective in Finnish used to describe materials or formations that can be drilled. It is formed from the verb porata, meaning to drill, with the adjectival suffix -ttava, yielding the sense of “that can be drilled” or “drillable.”

In geology, mining, and petroleum exploration, porattava materials are those suitable for borehole drilling to obtain cores or samples and to establish access for further testing or extraction. The term is common in technical reports, planning documents, and field assessments where the feasibility and cost of drilling depend on material properties and drilling conditions.

Drillability is not a fixed property; it depends on factors such as hardness, abrasiveness, porosity, and the presence of fissures or water. Evaluations typically combine surface testing, core logging, and pilot drilling to assess how easily a formation can be penetrated and how much wear or energy a drill would require. The concept is context-specific, with different standards and thresholds for various projects.

Examples of usage include describing rock types as porattava (for example, drillable limestone) or noting that certain layers are not porattava under given conditions. The term is primarily a technical descriptor used in engineering, geology, and construction to communicate the practicality and planning implications of drilling operations. See also poraus (drilling) and porattavuus (drillability).