There are rich and diverse roller bits to meet different requirements of formations and rotary speeds. The sizes of the gage diameter and the types of bit are strictly designed in accordance with the standards API Spec.7, with the certificate of authority to use the official API monogram.
There are not only rubber sealed bearing bits but also metal face sealed bearing bits, and all bits are lubricated by new type of wear resistant grease that can sustain high temperature up to 250°C.
The surfaces of main or key parts are hard faced and treated with friction reducing technology. They can enhance gage protection and prolong the life of bit.
Center nozzle is equipped for bits of larger sizes..
Specifications:
Size |
IADC Code |
API Regular Pin (in) | |
|
in |
mm | ||
|
3 7/8 |
|
126 617 |
|
|
4 1/4 |
107.9 |
131 321 |
2 3/8 |
|
4 5/8 |
117.5 |
121 241 527 |
2 7/8 |
|
4 3/4 |
120.6 |
241 | |
|
5 5/8 |
142.9 |
121 241 321 537 |
3 1/2 |
|
5 7/8 |
149.2 |
241 321 517 537 547 617 637 | |
|
6 |
152.4 |
211 216 246 437 517 527 537 547 617 637 | |
|
6 1/8 |
155.6 |
117 211 437 517 | |
|
6 1/4 |
158.7 |
121 241 321 517 527 537 547 637 | |
|
6 1/2 |
165.1 |
517 | |
|
6 3/4 |
171.4 |
121 241 321 | |
|
7 1/2 |
190.5 |
121 124 134 217 244 517 527 547 617 |
4 1/2 |
|
7 7/8 |
200 |
121 124 131 134 241 321 517 527 547 617 | |
|
8 3/8 |
212.7 |
215 217 517 527 537 547 617 637 | |
|
8 1/2 |
215.9 |
114 116 117 121 124 126 127 131 134 137 211 216 217 241 247 321 437 447 517 527 537 547 617 637 837 | |
|
8 3/4 |
222.2 |
127 417 437 447 517 537 617 | |
|
9 1/2 |
241.3 |
117 124 125 127 437 517 527 537 617 637 |
6 5/8 |
|
9 5/8 |
244.5 |
114 121 124 131 134 437 517 527 | |
|
9 7/8 |
250.8 |
115 121 211 241 321 512 542 612 732 | |
|
10 |
254 |
126 | |
|
10 5/8 |
269.9 |
127 217 417 517 527 | |
|
11 5/8 |
295.3 |
117 127 137 217 417 517 537 547 | |
|
12 |
304.8 |
124 126 216 517 537 547 617 | |
|
12 1/8 |
308 |
547 | |
|
12 1/4 |
311.1 |
114 115 116 117 121 124 126 131 134 137 211 214 244 437 517 527 537 547 617 637 | |
|
13 5/8 |
346.1 |
114 115 121 124 437 515 517 | |
|
13 3/4 |
349.2 |
114 115 437 517 | |
|
14 3/4 |
374.6 |
136 127 517 527 |
7 5/8 |
|
15 |
381 |
121 124 241 244 | |
|
15 1/2 |
393.7 |
125 215 217 517 537 | |
|
16 |
406.4 |
115 215 515 535 545 | |
|
17 1/2 |
444.5 |
435 515 437 517 527 537 547 | |
|
18 |
457.2 |
547 | |
|
18 1/2 |
469.9 |
547 | |
|
19 1/4 |
489 |
115 225 | |
|
20 |
508 |
125 215 515 525 | |
|
22 |
558.8 |
124 | |
|
24 |
609.6 |
124 | |
|
26 |
660.4 |
114 124 134 525 | |
|
36 |
914.4 |
124 | |