The entire bit body of the pcd drill bit is made of medium carbon steel and machined using a fabrication process. The bit crown is treated with a surface hardening process (sprayed tungsten carbide wear layer, carburized) to enhance erosion resistance.
Specification Of Steel PDC Drag Bit Drilling
|
Diameter
|
Wings
|
|
mm
|
inch
|
|
51
|
2”
|
3
|
|
65
|
2 1/2”
|
3
|
|
76
|
3”
|
3
|
|
89
|
3 1/2”
|
3
|
|
92
|
3 5/8”
|
3/4
|
|
95
|
3 3/4”
|
3/4
|
|
98
|
3 7/8”
|
3/4
|
|
102
|
4”
|
3/4
|
|
108
|
4 1/4”
|
3/4
|
|
114
|
4 1/2”
|
3/4
|
|
127
|
5”
|
3/4
|
|
133
|
5 1/4”
|
3/4
|
|
146
|
5 3/4”
|
3/4
|
|
152
|
6”
|
3/4
|
|
171
|
6 3/4”
|
2003/4/5
|
|
191
|
7 1/2”
|
2003/4/5
|
|
216
|
8 1/2”
|
2004/5/6
|
Steel PDC Bit Performance
The drill head is treated with the surface hardening process (spraying tungsten carbide wear -resistant layer) to enhance its erosion resistance. The advantage of steel body is that the manufacturing cost is low and easy to repair.
