The ornamental design for a flexiblesheet for insertion in a borehole, as shown and described.
FIG. 1 is a perspective view of a flexible sheet for insertion in a borehole showing my new design in a flat state;
FIG. 2 is a perspective view of the flexible sheet for insertion in a borehole of FIG. 1 shown in a curved state;
FIG. 3 is a top view thereof;
FIG. 4 is a front view of the flexible sheet for insertion in a borehole of FIG. 1;
FIG. 5 is a rear view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a partial enlarged top view thereof according to broken line circle “7” shown in FIG. 6;
FIG. 8 is a side view of the flexible sheet for insertion in a borehole of FIG. 1; and,
FIG. 9 is a partial enlarged side view according to broken line circle “9” shown in FIG. 8.
The claim is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design.