IADC CODE SELECTION
| IADC | WOB | RPM | Application |
| (KN/mm) | (r/min) |
| 111/114/115 | 0.3-0.75 | 200-80 | very soft formations with low compressive strength and high drill
ability, like clay, mudstone, chalk |
| 116/117 | 0.35-0.8 | 150-80 | very soft formations with low compressive strength and high drill
ability, like clay, mudstone, chalk |
| 121 | 0.3-0.85 | 200-80 | soft formations with low compressive strength and high drill
ability, like mudstone, gypsum, salt, soft limestone |
| 124/125 | 180-60 |
| 131 | 0.3-0.95 | 180-80 | soft to medium formations with low compressive strength, like
medium, soft shake, medium soft limestone, medium soft sandstone,
medium formation with harder and abrasive interbeds |
| 136/137 | 0.35-1.0 | 120-60 |
| 211/241 | 0.3-0.95 | 180-80 | medium formations with high compressive strength, like medium, soft
shake, hard gypsum, medium soft limestone, medium soft sandstone,
soft formation with harder interbeds. |
| 216/217 | 0.4-1.0 | 100-60 |
| 246/247 | 0.4-1.0 | 80-50 | medium hard formation with high compressive strength, like hard
shale, limestone, sandstone, dolomite |
| 321 | 0.4-1.0 | 150-70 | medium abrasive formations, like abrasive shale, limestone,
sandstone, dolomite, hard gypsum, marble |
| 324 | 0.4-1.0 | 120-50 |
| 437/447/435 | 0.35-0.9 | 240-70 | very soft formations with low compressive strength and high drill
ability, like clay, mudstone, chalk, gypsum, salt, soft limestone |
| 517/527/515 | 0.35-1.0 | 220-60 | soft formations with low compressive strength and high drill
ability, like mudstone, gypsum, salt, soft limestone |
| 537/547/535 | 0.45-1.0 | 220-50 | soft to medium formations with low compressive strength, like
medium, soft shake, medium soft limestone, medium soft sandstone,
medium formation with harder and abrasive interbeds |
| 617/615 | 0.45-1.1 | 200-50 | medium hard formation with high compressive strength, like hard
shale, limestone, sandstone, dolomite |
| 637/635 | 0.5-1.1 | 180-40 | hard formation with high compressive strength, like limestone,
sandstone, dolomite, hard gypsum, marble |
| Note: Above limitts of WOB and RRPM should not be used
simultaneously |
PIN SIZE
| Bit Diameter | API PIN |
| (inch) | (mm) |
| 3 7/8"~5 1/4" | 98~134 | 2 3/8", 2 7/8" |
| 5 5/8"~6 3/4" | 143~171 | 3 1/2" |
| 7 1/2"~9 1/2" | 190.5~241 | 4 1/2" |
| 9 5/8"~13 3/4" | 245~350 | 6 5/8" |
| 14 5/8"~26" | 371~660.4 | 7 5/8" |
IADC Code Classifications
STEEL MILLING TOOTH BITS
IADC 1 SERIES DRILL BITS
These bits are used to drill low-compressive strength, soft
formations. Long projection tooth lengths are used on high offset
cones to provide the greatest penetration rates possible.
Wear-resistant hardfacing is used to control tooth wear. On the
softest bit types this hardfacing completely covers the bit teeth.
IADC 2 SERIES DRILL BITS
These bits are used to drill high-compressive strength, medium hard
formations. Short projection teeth with reduced crest length are
used in this series of bit designs. Durable hardfacing is applied
to reduce tooth wear.
IADC 3 SERIES DRILL BITS
These bits are used to drill hard and abrasive formations. Very
short, closely spaced teeth with minimum amounts of hardfacing are
used for breakage resistance. These bits must withstand high loads
and drill abrasive formations with a crushing, cutting action.
TCI (TUNGSTEN CARBIDE INSERT) BITS
IADC 4 SERIES DRILL BITS
These bits are used to drill low compressive strength, very soft
formations. The bits maximize the use of both conical and chisel
inserts of large diameters and high projection. This cutting
structure design, combined with maximum cone offset, results in
high bit penetration rates. The deep intermesh of cutter rows
prevents bit balling in sticky formations.
IADC 5 SERIES DRILL BITS
These bits are used to drill low compressive strength, soft to
medium soft formations. Drill bit design features are used to
enhance bit penetration rates. Some reduction in cone offset and
insert projection is used to improve cutter durability. Insert
numbers and pitch is controlled to prevent tracking.
IADC 6 SERIES DRILL BITS
These bits are used to drill high-compressive strength, medium hard
formations. A small amount of cone offset and low insert projection
is used to prevent cutting structure damage when hard streaks are
encountered. Increased numbers of blunter, smaller diameter inserts
are used to increase life in harder, more abrasive formations.
IADC 7 SERIES DRILL BITS
These bits are used to drill hard and abrasive formations. A more
wear-resistant grade of tungsten carbide insert is used to prevent
wear. Low cone offset with increased numbers of breakage resistant
cutters add to the required bit durability.
IADC 8 SERIES DRILL BITS
These bits can be used to drill extremely hard and abrasive
formations. Wear-resistant inserts are used in the outer rows to
prevent loss of bit gauge. Maximum numbers of hemispherical-shaped
inserts are used in all rows to provide cutter durability and long
life.
About us
MIROC® Rock Drilling Tools are Rock Drilling Tools Brand by KSQ
Tecnologies (Beijing) Co. Ltd.
KSQ Technologies (Beijing) Co. Ltd. provides exceptional technical
know-how in development, production, and application. The company
has adopted advanced manufacturing processes to ensure high quality
steels and tungsten carbide inserts for its rock drilling
accessories. Its personnel understand clients’ drilling needs, and
have the service skills to recommend the right drilling tools for
the job. Its experienced product developers can also create custom
tools. Furthermore, the company’s development team introduces
innovative products each year – tools that are rigorously tested in
the field and proven
to perform beyond industry expectations.
MIROC® Rock Drilling and Ground Support Tools include:
Integral Rods
Plug Hole Rods
Tapered Drilling Tools
Extension Drilling Tools
Drifting and Tunneling Tools
Reaming Tools
Shank Rods
Shank Adapters (Striking Bars)
Down-the-hole (DTH) Bits
Down-the-hole (DTH) Hammers
Forging Processing Red Color 12 1/4'' TCI Tricone Bit , Tricone Roller Bit
