FIELD: testing the nature of borehole walls, formation testing, methods or apparatus for obtaining samples of soil or well fluids, namely downhole tools to determine reservoir parameters.
SUBSTANCE: method involves arranging downhole tool having probe in well bore, wherein the probe comprises at least one executive mechanism for probe extension and retraction; moving the probe to provide probe contact with well wall and accumulating reservoir data. Protective screen is arranged around probe. The protective member may slide between retracted position, where protective member is arranged near body, and extended position, where protective member touches well bore wall, independently of probe.
EFFECT: improved probe and well bore protection, possibility to accumulate data or take samples without erosion.
30 cl, 10 dwg
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