8 1/2" kingdream new 127steel tooth tricone bits
| Sealed bearing structure | Abrasion resistance and seizure resistance of the bearing are improved and suitable for high rotary speed. The advanced metal seal package will improve the reliability and durability of bearing seal |
| Types | steel tooth tricone bit (mill tooth tricone bit) and tricone bit (tungsten carbide inserted tricone bit) , both of used for mining pilling , water well drilling or oil well drilling |
| Formation or layer |
sticky, soft , medium soft , hard, medium hard , very hard formation
|
| Applicable |
water well , oil field , construction , geothermal , directional boring , underground foundation work
|
|
IADC
|
437
|
517
|
537
|
617
|
637
|
737
|
|
|
WOB
|
KN/mm (bit dia.)
|
0.5-0.75
|
0.5-0.85
|
0.5-0.85
|
0.55-0.85
|
0.55-0.85
|
0.55-0.85
|
|
Lb/in (bit dia.)
|
2860-4280
|
2860-4860
|
2860-4860
|
3140-4860
|
3140-4860
|
3140-4860
|
|
|
r.p.m
|
70-45
|
70-45
|
70-45
|
70-45
|
60-40
|
60-40
|
|
|
Size
|
IADC Code
|
|
|
In .
|
Mm
|
|
|
6
|
152.4
|
136,127,517,537,617,637
|
|
6 1/2
|
165.1
|
126,127,517,537,617,637
|
|
7 1/2
|
190.5
|
126,136,216,227,517,537,617,637
|
|
8 1/2
|
215.9
|
114,124,126,127,517,537,617,637
|
|
9 1/2
|
241.3
|
126,127,517,537,617,637
|
|
9 5/8
|
244.5
|
127,517,537,617,637
|
|
9 7/8
|
250.8
|
127,517,537,617,637
|
|
12 1/4
|
311.1
|
114,126,127,517,537,617,637
|
|
13 5/8
|
346
|
117,126,127,517,537,617,637
|
|
14 3/4
|
374.6
|
124,517,537,617,637
|
|
15
|
381
|
124,517,537,617,637
|
|
15 1/2
|
393.7
|
124,517,537,617,637
|
|
17 1/2
|
444.5
|
114 117 124 126 216
|
|
22
|
558.8
|
124,517,537,617,637
|
|
24
|
609.6
|
124,517,537,617,637
|
|
26
|
660.4
|
114,517,537,617,637
|