poraustöiden

Poraustyöt refers to activities involved in creating boreholes by drilling into the ground or rock. The term is used in contexts such as mineral exploration, oil and gas drilling, groundwater well construction, geothermal energy projects, and geotechnical investigations for construction. The purpose of poraustyöt can be to access subsurface resources, obtain rock or soil samples, or install casings, sensors, or other equipment.

Common methods and equipment include rotary drilling, percussion (hammer) drilling, auger drilling, and core drilling. Equipment used comprises drill rigs, drill strings, drill bits, casings, and drilling fluids or muds that stabilize the borehole and transport cuttings to the surface. The choice of method depends on factors such as rock type, depth, borehole diameter, and intended use of the borehole. Core drilling is specifically used to recover intact rock samples for analysis, while other methods focus on establishing a functional borehole or well.

The typical process involves planning and permitting, site surveys, borehole design, mobilization of equipment, drilling operations, logging and sampling, and borehole completion with casing and seals. After testing, the borehole may be abandoned or rehabilitated if no longer in use. Environmental and safety considerations include preventing groundwater contamination, managing drill cuttings and waste, mitigating noise, ensuring well control, and protecting worker safety.

Poraustyöt require trained crews and compliance with standards and regulations. They are a fundamental activity in natural resource management, construction, and energy projects in Finland and elsewhere, often involving coordination with environmental authorities, geological agencies, and local communities.