I. Pre-Drilling Preparations for Diamond Drill Bits
1. Inspect the previous diamond drill bit for any damage to the body, tooth loss, etc., and ensure the well bottom is clean and free of debris.
2. Handle the diamond drill bit with care, placing it on a rubber mat or wooden board to prevent damage.
3. Check for any damage to the cutting teeth of the diamond drill bit and ensure there are no foreign objects inside the bit.
II. Attaching the Diamond Drill Bit
1. Clean the male or female threads of the diamond drill bit and apply thread oil to facilitate attachment.
2. Use a tong to grip the diamond drill bit and lower the drill string to engage the threads.Diamond Drill Bit Usage Precautions
3. Place the diamond drill bit and tong together into the rotary table sub, then tighten the threads to the recommended torque value.
4. When mounting or dismounting the drill bit or reamer, avoid using tools to clamp, hold, or violently strike the diamond matrix area to prevent the matrix from fracturing and causing hole accidents.
III. Running in the Drill Bit
1. Lower the diamond drill bit slowly to protect the cutting teeth from damage.Diamond Drill Bit Usage Precautions
2. Be mindful of any sections of the well that encountered resistance during the last trip out; slow down when passing through contractions and doglegs.
3. Approximately one single joint above the well bottom, begin rotating at a drilling speed of 50-60 rpm and start the pump at the rated flow rate to flush the well bottom.
4. Monitor the weight indicator and torque to ensure the diamond drill bit contacts the well bottom smoothly.
