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IADC: 517 - TCI journal sealed bearing bit with gauge protection for soft to medium soft formations with low compressive strength .
85 - 100 MPA
12,000 - 14,500 PSI
Medium hard and abrasive rocks such as sandstones with streaks of quartz, hard limestone or chert, hematite ores, hard, well-compacted abrasive rock such as: sandstones with quartz binder, dolomites, quartzite shales, magma and metamorphic coarse grained rocks.
8.5 inches (215mm or 216mm) API TCI Tricone Bits for Hard Rock
8 1/2"(215mm or 216) is a regular size in deep well drilling like oil and gas well drilling, and it is also a regular size in horizontal directional pilot hole drilling.
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Basical Specification |
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Size of Rock Bit |
8 1/2inches |
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215mm or 216mm |
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Bit Type |
TCI Tricone Bit |
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Thread Connection |
4 1/2 API REG PIN |
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IADC Code |
IADC 517G |
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Bearing Type |
Journal Sealed Bearing with Gauge Protection |
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Bearing Seal |
Elastomer or Rubber/ Metal |
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Heel Protection |
Available |
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Shirttail Protection |
Available |
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Circulation Type |
Mud Circulation |
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Drilling Condition |
Rotary drilling, high temp drilling, deep drilling, motor drilling |
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Nozzles |
3 |
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Operating Parameters |
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WOB (Weight On Bit) |
16,852-48,310 lbs |
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75-215KN |
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RPM(r/min) |
140~60 |
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Formation |
Soft to medium formation with low compressive strength, such as mudstone, gypsum, salt, soft limestone, etc. |