The invention discloses an underground
drill bit track closed-
loop control tool, and belongs to the field of drilling technologies and oil and gas exploitation. According to the tool, a closed-
loop control framework integrating measurement, analysis and execution is adopted, and accurate regulation and control of the three-dimensional track of the
drill bit are achieved through an
electric control system. A high-precision electronic
gyroscope is embedded in the end, close to the
drill bit, of the tool, and
drill bit track data are collected in real time and fed back to a
ground control station; the front
servo motor and the rear
servo motor drive the
bevel gear set and the rotary supporting mechanism respectively, and the transverse
deflection angle and the
azimuth angle of the
drill bit are cooperatively controlled by combining
linear motion and
axial rotation of a push rod rack, so that dynamic adjustment of a three-dimensional track is achieved. A through type
drilling fluid channel is formed in the tool, and drilling power supply and rock debris removal are ensured through a high-pressure hose and a built-in channel. The closed-
loop control process comprises the steps of real-
time data acquisition, deviation analysis,
servo motor instruction generation and track correction circulation until the deviation between an actual track and a target track is smaller than a threshold value. In addition, the tool is integrated with a fault detection and redundancy control module, the motor, the sensor and the communication state are monitored in real time, a standby strategy or emergency shutdown is switched when abnormity occurs, and safety and reliability of the
system are guaranteed. Through the electromechanical integration design, the precision, the efficiency and the
automation level of underground
drill bit track control are remarkably improved.