Choose the type of diamond bit according to the type of PDC bit and the appropriate lithology: Generally, the formation drillability grade value is less than 5, that is to say, for very soft to medium-hard formations, a PDC bit should be selected. The drillability grade value of the formation is greater than 5 and less than 8, that is, the TSP bit is used for medium-hard formations. The drillability value of the formation is greater than 8, that is, the natural diamond bit is used for the formation that is difficult to form.

       Selection and reasonable use of geological exploration pdc core drill bit. PDC core drill bit refers to a one-piece drill bit made by welding a composite sheet of composite material on a rigid body through a special process. There are several advantages:

       1. Outstanding wear resistance: Due to its special welding process, the composite plate will not lose a large area when cutting the rock, and the cutting time is long. Its wear rate is dozens of times that of diamond drill bits.

       2. Good specification performance: The rigid body of the PDC bit is not directly generated by the friction of the rock formation like the rigid body of the diamond bit. Carbide gauge bars are welded on the inside and outside of the rigid body, which effectively reduces the loss of the rigid body and maintains the bottom diameter of the hole.

      3. Good impact performance: The composite drill bit can drill at high speed, high pressure, and large water volume. Experiments have proved that the Jinxinhai composite drill bit can still ensure the integrity of the composite sheet under the premise of more than one thousand revolutions. Jump the movie.

Geological Exploration PDC Core Drill Bit performance characteristics PDC core drill bit selects high-quality diamond composite sheet, which has the characteristics of wear resistance, high drilling efficiency, and constant quality, which greatly improves drilling efficiency, improves construction efficiency, and reduces construction labor intensity. The best effect is used in rock formations with f≤12.

It is used for drilling in geological exploration and hydrological exploration.

Technical parameter name, model, a suitable rock formation

PDC core drill bit Φ75-Φ153mm

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