Alignment sub

[0001]FIG. 1 is a front, right, top perspective view of an alignment sub showing an embodiment of our new design;

[0002]FIG. 2 is a rear, left, top perspective view of the alignment sub of FIG. 1;

[0003]FIG. 3 is a top plan view of the alignment sub of FIG. 1;

[0004]FIG. 4 is a bottom plan view of the alignment sub of FIG. 1;

[0005]FIG. 5 is left-side elevated view of the alignment sub of FIG. 1;

[0006]FIG. 6 is a right-side elevated view of the alignment sub of FIG. 1;

[0007]FIG. 7 is a front elevated view of the alignment sub of FIG. 1;

[0008]FIG. 8 is a rear elevated view of the alignment sub of FIG. 1;

[0009]FIG. 9 is a cross section view of the alignment sub of FIG. 1, taken along line 9-9 of FIG. 7; and,

[0010]FIG. 10 is a cross section view of the alignment sub of FIG. 1, taken along line 10-10 of FIG. 7.

[0011]The evenly spaced broken lines depict portions and environment of the alignment sub that form no part of the claimed design. The dot dot dashed lines denote the boundaries of the claim and form no part thereof.