The mark consists of a circular stylized drilling image defined by a left edge portion and a right edge portion of the circle filled in with solid gray color, the left edge portion and the right edge portion terminating at spaced-apart vertical inner edges to define an open vertical gap therebetween (within the circular image); two overlapping sinusoidal or parabolic lines extending along the open vertical gap between the left and right edge portions; with a topmost sinusoidal line in blue color and starting at the top left of the circular image, then bending to the right around a vertical midpoint of the circular image, then bending back to the left to terminate at the bottom left of the circular image; and with a bottommost sinusoidal line in green color and starting at the top right of the circular image, then bending to the left around a vertical midpoint of the circular image, then bending back to the right to terminate at the bottom right of the circular image; the blue sinusoidal line intersecting and overlaying the green sinusoidal line at one location above the vertical midpoint of the circular image and at one location below the vertical midpoint of the circular image, both intersections spaced from the respective top and bottom of the circular image; the words Terra Sonic International extending in capitalized letters to the right of the circular image, with Terra Sonic is larger bolder typeface located above the word International.