The ornamental design for a downholesensortool, as shown and described.
FIG. 1 is an upper perspective view of the downhole sensor tool showing my design downhole sensor tool.
FIG. 2 is a front elevation view thereof;
FIG. 3 is a back elevation view thereof;
FIG. 4 is a side elevation view thereof;
FIG. 5 is an opposite side elevation view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is an exploded perspective view thereof, showing four sensors on one end and an inner chassis released from another end, wherein the inner chassis has surface structures in broken lines.
The downhole sensor tool is deployed into a borehole along a drill string to measure conditions with the sensors on the one end. The broken line features are illustrative and form no part of the claimed design.