FHSeries
Pilot Hole Opener Cone Bit
Bit Size |
Bit Type |
|
inch |
mm |
|
15 |
381 |
FH117G FH127G FH517G FH537G FH617G |
28 |
711.2 |
FH117G FH127G FH517G FH537G FH617G |
30 |
762.0 |
FH117G FH127G FH517G FH537G FH617G |
32 |
812.8 |
FH117G FH127G FH517G FH537G FH617G |
36 |
914.4 |
FH117G FH127G FH517G FH537G FH617G |
IADC |
Recommendation |
Applicable Formation |
|
WOB |
RPM |
||
117 127 |
0.35~0.9 |
150~70 |
Soft formations with low compressive strength and high drillability, such as mudstone, gypsum, salt, soft shale, soft limestone, etc. |
517 537 |
0.4~1.0 |
120~60 |
Soft to medium formations with low compressive strength, such as medium soft shale, hard gypsum, medium soft limestone, medium soft sandstone, soft formation with harder interbed, etc. |
Note: the maximum value of WOB and RPM in this table can not be adopted at the same time.