复合片钻头，聚晶金刚石复合片钻头的简称。是石油钻井行业常用的一种钻井工具。

  Polycrystalline Diamond Compact,Polycrystalline diamond compact bit. It is a kind of drilling tool commonly used in petroleum drilling industry.

复合片钻头操作使用规程：

Operating instructions：

1、复合片钻头针对的地层是4—10级地层（按12级标准）

2、复合片钻头工作原理是刮削，（切削）。

3、软底层复合片钻头设计上垂直度高，硬应底层垂直度低

4、钻压一般来说800-1000公斤压力，钻速89的钻头150--200转，钻头越大钻速越低

5、针对粉砂岩（细砂岩）以钢件钻头为主，片数少的为佳，98/89钻头4翼的，113/108钻头5翼或6翼为佳，钻进速度快，效率高

6、针对粗砂岩（砂砾岩）以热压体钻头为主，片数多的为佳，98/89钻头8翼的，113/108钻头10翼为佳。寿命长，保径效果好。不需要重新扩孔。

1, The formation of the compound bit drill is 4 - 10 strata (according to the level of 12)

2, The working principle of PDC bit scraping, (cutting).

3. The design of the bottom layer of the composite bit is high, and the hardness should be low

4, Drilling pressure in general 800-1000 kg pressure, drilling speed of 89 bit 150--200 turn, the greater the drill bit faster drilling speed

5, In order to powder sandstone (fine sandstone) to the steel bit based, the number of small pieces of good, 98/89 drill 4 wings, 113/108 bit or better than the 6 wings, drilling speed, high efficiency

6, For the coarse sand (Sha Liyan) to hot press bit, the number of pieces is better, 98/89 drill 8 wings, 113/108 bit better for the 10 wings. Long life, good effect of retaining diameter. No need to re expand.