In the past, a human driller would manually operate the brakes to lower the drill pipe, trying to maintain a steady pressure on the bit. An autodriller uses sensors and software to do this with much higher precision.

An autodriller is an electronic control system that automatically manages the and rate of penetration (ROP) during drilling. It replaces manual air/hydraulic drilling controls, using setpoints and real-time sensor feedback (hookload, block position, mud pressure) to maintain consistent drilling parameters.

The difference between the pressure inside the drill pipe and the annulus, which indicates how hard the mud motor is working.

The speed at which the bit moves through the rock.

These papers provide a good starting point for understanding the current state of autodrilling technology, its applications, and future research directions.

The system acts as a "smart cruise control." The operator sets a target value for one of these parameters (e.g., 20,000 lbs of WOB), and the autodriller manages the drawworks to keep the bit at that exact weight, regardless of changing rock formations. Key Benefits of Autodrilling Systems