Wellbore Notching Assembly

A well tool for generating a notch in an open-hole wellbore, the well tool comprising:

• a tool body comprising:
• a housing defining at least one slot, the housing defining an interior volume;
• a cutting device disposed in the interior volume of the housing, the cutting device configured to form a notch in a formation through which the wellbore is formed, the cutting device comprising:
• a shaft disposed in the interior volume of the housing, the shaft comprising:
• a first portion having first exterior threads that extend around the first portion in a first direction, and
• a second portion having second exterior threads that extend around the second portion in a second direction, wherein the second direction is opposite the first direction;
• and
• multiple blades having a first blade extending from the first portion of the shaft and a second blade extending from a second portion of the shaft, wherein the first and second blade are attached,
• wherein the multiple blades are configured to extend radially outward toward the formation through the slot or inward away from the formation.