1. Preparation of diamond bit before drilling
　　 1. Check the previous diamond bit for damage to the bit body, missing teeth, etc., and make sure the bottom of the well is clean and free of falling objects.
　　2. Carry the diamond bit carefully and place the diamond bit on a rubber pad or wooden board. It is forbidden to place the diamond bit directly on the iron plate.
　　3. Check whether the cutting teeth of the diamond bit are damaged, whether there are foreign objects in the diamond bit, whether there is an O-ring in the nozzle hole, and install the nozzle as required.
2. Diamond drill bit buckle
　　 1. Clean the male or female buckle of the diamond bit and apply thread oil.
　　2. Clamp the shackle on the diamond drill bit, and lower the drill string to make it contact with the male or female buckle to buckle.
　　3. Put the diamond bit and the shackle into the turntable to fill the core, and then tighten the thread according to the recommended torque value.
Three. Drill down
　　 1. It is necessary to lower the diamond drill bit slowly, especially slowly through the turntable, blowout preventer, and casing hanger to protect the cutting teeth. 2. Pay attention to the well block encountered during the last trip. When you encounter reduced diameter and dog legs during the drilling process, the drill bit should be passed slowly.
　　3. When a single root is about 1 to the bottom of the well, it starts to rotate at a drilling speed of 50~60rpm and start the pump to flush the bottom of the well with a rated displacement.
　　4. Pay attention to the indicator weight and torque to make the diamond bit touch the bottom of the well.
4. Diamond drill bit cuts the eye
　　 1. It is not recommended to use diamond drill bits for borehole drilling.
　　2. When eyelashing is necessary, the eyelashes should be drawn slowly with low torque at the rated displacement.
5. Diamond drill shape
　　 1. Keep the rated displacement and lower the diamond bit to the bottom of the well.
　　2. Use slow drilling at least 1m to establish a bottom hole model.
　　3. Increase the drilling pressure to the normal drilling value by an increase of 10kN each time. Excessive pressure is strictly prohibited, which may cause early damage to the diamond bit.
　　4. Keep the weight on bit constant and adjust the drilling rate so as to obtain the standard drilling parameter combination.
6. Normal drilling of diamond bit
　　 1. When encountering strong abrasive or hard sandy mudstone, reduce the drilling speed to extend the life of the diamond bit.
　　2. When encountering formation changes or interlayer, adjust the drilling speed and diamond bit to maintain standard drilling performance.
　　 3. Pay attention to the following points each time you receive a single root: 3.1 Restore the pump stroke and check the standpipe pressure. 3.2 in
　　 Before the diamond bit touches the bottom of the well, start the pump, and slowly lower the diamond bit to the bottom of the well at a drilling speed of 50-60 rpm. 3.3 Slowly restore the pressure to the original diamond bit, and then increase the drilling speed to the original drilling speed.
　　Proof of on-site use,
　　 When drilling in soft-medium-hard formations, the diamond bit has the advantages of fast speed, large footage, long life, stable work, fewer downhole accidents, and good well quality. Diamond drill bits are not only used for a long time, but also can be reused. The use effect of the returned diamond drill bit is similar to the factory diamond bit, which can save a lot of drilling costs.