FIELD: geology.
SUBSTANCE: invention relates to a device, system and method of sampling formation medium. Device comprises a probe for a geological formation, comprising at least one fluid inlet channel with an inlet zone, having selected, stepwise variable size and comprising multiple independently movable relative to each other sealing elements, which may be activated by pushing until contact with well wall, or moving backwards, to increase or decrease area of inlet zone, wherein inlet zone includes an inlet zone of a guide probe having stepwise controlled size, by means of selective activation of one or more selected sealing elements.
EFFECT: high efficiency of sampling.
20 cl, 7 dwg
