A Shock Tool is a downhole drilling tool designed to absorb vibrations and sudden impacts during drilling. It acts like a damper and is typically placed between the drill bit and the drill string. When the bit encounters hard formations or sudden changes in rock properties, the shock tool absorbs the impact energy, preventing these stresses from being transmitted to the drill string or surface equipment. 🔹 Key benefits: • Extends the service life of the bit and bottom-hole assembly (BHA) • Reduces vibration and mechanical fatigue in the drill string • Improves rate of penetration (ROP) by ensuring smoother bit performance • Protects sensitive tools such as drilling motors and MWD/LWD systems In short, a shock sub functions as a mechanical shock absorber and protector in drilling operations.