Rock bits |
 |
Milled tooth
rock bits - Small diameters |
|
 Manufactured
with superior quality steel, advanced technologies, designed for
use with compressed air or fluid circulation systems.
Regular and Jet circulation available.
Cutting structures allow optimum penetration rates and long runs
even in the most difficult and abrasive formations.
Weight on the bit is distributed through a five part anti-friction
bearing matched and ground with precision to tolerances of ±
0,0002".
Critical areas on the external portion of the bit are protected
with tunsten carbide alloy hardfacing.
Available for:
- Soft
- Medium - Soft
- Medium - Hard
- Hard formations
Bit type availability
SIZE |
REGULAR API |
WEIGHT APPROX |
TOOTH TYPE |
INSERT TYPE |
in. |
mm. |
PIN SIZE |
KG |
T3 |
T2 |
T1H |
SE54 |
SE56 |
SE58 |
2 
- 2  |
73-75 |
N-ROD (4 thd) |
1.8 |
|
|
|
|
|
|
3 - 3  |
76-89 |
N-ROD (4 thd) |
2 |
|
|
|
|
|
|
3 
- 3 |
95-98 |
2 
API REG. |
4 |
|
|
|
|
|
|
4 - 4  |
101-105 |
2
API REG. |
5 |
|
|
|
|
|
|
4 
- 4 |
108-114 |
2
API REG. |
5 |
|
|
|
|
|
|
4
- 5" |
120-127 |
2
API REG. |
5.5 |
|
|
|
|
|
|
5
- 5 |
130-140 |
2
API REG. |
7 |
|
|
|
|
|
|
5 |
149 |
3
API REG. |
11.5 |
|
|
|
|
|
|
6 - 6 |
152-155 |
3
API REG. |
12.6 |
|
|
|
|
|
|
6
- 6 |
159-165 |
3
API REG. |
18 |
|
|
|
|
|
|
6 |
171 |
3
API REG. |
18 |
|
|
|
|
|
|
7 |
200 |
4
API REG. |
34 |
|
|
|
|
|
|
8 |
216 |
4
API REG. |
38 |
|
|
|
|
|
|
Denotes
regular circulation
Denotes
jet circulation
Top 
Tungsten
carbide rock bits - Small diameters |
|
 When
drilling hard and abrasive formations with tooth type rock bits,
an excessive wear of the teeth may occur. It is necessary in such
cases to use tungsten carbide insert rock bits. A specified in the
next table of drilling parameters, more weight must be given when
drilling with T.C.I. rock bits in order to obtain a major compression
effect on hard rock being drilled.
Drilling parameters
ROCK BIT TYPE |
FORMATION TO DRILL |
WEIGHT PER INCH OF
DIAM. (KG) |
RPM - ROTARY SPEED |
|
|
MIN |
MAX |
MIN |
MAX |
TOOTH TYPE ROCK BIT |
SOFT - MEDIUM SOFT |
450 |
1300 |
60 |
110 |
MEDIUM HARD |
450 |
1800 |
50 |
100 |
HARD - VERY HARD |
900 |
2200 |
40 |
80 |
| |
|
|
|
|
|
T.C. INSERT ROCK BIT |
MEDIUM SOFT |
450 |
1800 |
45 |
80 |
MEDIUM HARD - ABRASIVE |
1200 |
2800 |
40 |
80 |
HARD AND ABRASIVE |
1800 |
3100 |
30 |
60 |
Top
Rotary
rock bits - Large diameters new and retipped, rerun |
|
For oil and water well drilling.
New and reconditioned of major U.S.A. brands: HUGHES, SMITH, REED,
SECURITY.
- milled steel tooth type
- tungsten carbide insert type
Available with sealed or regular bearing, with regular or jet circulation.
DIAMETER inch. |
DIAMETER mm. |
CONNECTION |
WEIGHT |
LBS |
KG |
5 "
|
149.2 |
3 "
API REG. PIN |
29 |
13 |
6" |
152.4 |
3 "
API REG. PIN |
32 |
14 |
6 " |
155.6 |
3 "
API REG. PIN |
33 |
14.5 |
6 " |
158.8 |
3 "
API REG. PIN |
40 |
18 |
6 " |
165.1 |
3 "
API REG. PIN |
46 |
21 |
6 " |
171.5 |
3 "
API REG. PIN |
49 |
22 |
7 " |
200.0 |
4 "
API REG. PIN |
76 |
34 |
8 " |
216.0 |
4 "
API REG. PIN |
90 |
41 |
8 " |
222.3 |
4 "
API REG. PIN |
92 |
42 |
9 "
- 9 " |
241.3 - 250.8 |
6  "
API REG. PIN |
141 |
65 |
10 " |
270.0 |
6 "
API REG. PIN |
170 |
77 |
11" |
279.4 |
6 "
API REG. PIN |
175 |
80 |
12 " |
311.2 |
6 "
API REG. PIN |
220 |
100 |
13 "
- 13 " |
342.9 - 349.3 |
6 "
API REG. PIN |
237 |
108 |
14 " |
374.7 |
6 "
o 7 "
API REG. PIN |
305 |
138 |
16" |
406.4 |
6 "
o 7 "
API REG. PIN |
415 |
187 |
17 " |
444.5 |
7 "
API REG. PIN |
580 |
262 |
22" |
558.8 |
7 "
API REG. PIN |
766 |
347 |
23" |
584.2 |
7 "
API REG. PIN |
820 |
372 |
26" |
660.4 |
7 "
API REG. PIN |
1335 |
605 |
28" |
711.2 |
8 "
API REG. PIN |
1600 |
720 |
Top
Classification
- IADC code |
|
Standard roller bearing
(IADC xx1 or xx3)
|
Roller bearing air cooled
(IADC xx2 or xx3)
|
Sealed roller bearing
(IADC xx4 or XX5)
|
Sealed friction bearing
(IADC xx6 or xx7)
|
IADC code number
 |
First digit
Bit type
(Milled tooth or Insert and formation)
| 1, 2, 3 |
Milled tooth bits
(softest to hardest) |
| 4, 5, 6, 7, 8 |
Insert bits
(softest to hardest) |
|
Second digit
Formation sub-category
(softest to hardest) |
Third digit
Bit feature
- Standard roller bearing
- Roller bearing air cooled
- Roller bearing gage protected
- Sealed roller bearing
- Sealed roller bearing gage protected
- Sealed friction bearing
- Sealed friction bearing gage protected
|
Tooth
type bits |
Soft formations
Bits that feature long, widely spaced teeth, to drill soft
formation such as shales, soft sandstone, clay and all unconsolidated
formations.
IADC CODES 111 - 126 - 134 |
 |
Medium formations
With medium length teeth, closer spaces, to drill unconsolidated
limestones, medium sandstones, clay, marls
IADC CODES 211 - 224 - 234 |
 |
Medium Hard - Hard formations
With short, closely spaced teeth with tungsten carbide hardfacing,
for hard and abrasive formations such as sandstones, dolomite,
hard limestone and granite.
IADC CODES 311 - 314 - 321 |
 |
Insert
rock bits |
| Soft - Medium Soft formations
Features large chisel-shaped tungsten carbide inserts to provide
the highest penetration rates in the softest formations such
as shales, clays, limestone and sands.
IADC CODES 437 - 517 - 527 |
|
Medium Hard - Hard formations
Effective in a variety of formations with higher compressive
strength such as hard limestone, sandstone, dolomite and other
formations with high abrasive quality, hard streaks and broken
formations.
IADC CODES 617 - 627 - 637 |
 |
Hard and abrasive formations
With hemispherical tungsten carbide inserts. To optimize penetration
rate in hard and abrasive formations such as granites, basalts,
quartzite and chert. Drilling weight of 3 ± 4 tons
per inch of diameter should be applied.
IADC CODES 732 - 737 - 837 |
 |
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