| CROWN PROFILES | |
| Extended channel flushing *Standard profile-general purpose design *Suitable for mixed formations containing broken and competent zones *Suitable for a broad range of formations | |
| Jet *High performance "free cutting"bit *High productivity *Suitable for hard/competent formations | |
| Face discharge *Designed to minimize flushing of core sample *Suitable for broken/granular formations | |
| Wheel gear *Speed performance *High productivity *Suitable for hard/competent formations | |
| Ball *Suitable for mixed formations containing broken and competent zones *Suitable for a broad range of formations | |
| CROWN HEIGHT | |
| Short depth holes | 7mm |
| Short to medium depth holes | 10mm |
| Deep holes | 14mm |
| FEATURES&BENEFITS |
| * Simplified bit selection |
| * Increased productivity |
| * Reduced inventory |
| * High performance |
| *Streamline application based product offering |
| STANDARD SPECIFICATION | |||||||
| ITEM | DIAMOND BIT | REAMING SHELL | |||||
| "Q" Series Wireline | Size | Bit-set OD | Bit-set ID | ||||
| mm | inch | mm | inch | mm | inch | ||
| AQ | 47.60 | 1.88 | 26.97 | 1.06 | 48.00 | 1.89 | |
| BQ | 59.50 | 2.35 | 36.40 | 1.43 | 59.90 | 2.36 | |
| NQ | 75.30 | 2.97 | 47.60 | 1.88 | 75.70 | 2.98 | |
| HQ | 95.58 | 3.77 | 63.50 | 2.50 | 96.00 | 3.78 | |
| PQ | 122.00 | 4.80 | 84.96 | 3.35 | 122.60 | 4.83 | |
| APPLICATION | |
| Application 1 | Soft to medium hard rock with abrasive and fractured to competent formations Matrix series 1-4 |
| Application 2 | Medium hard to hard rock with slightly abrasive and slightly broken to competent formations Matrix series 5-8 |
| Application 3 | Hard to very hard rock with competent formations Matrix series 9-10 |
| MATRIX SERIES | ||
| Rock Group | Formation Description | Rock Type |
| 1-4 | Soft to medium hard Very abrasive to slightly abrasive Very fractured to slightly broken | Unmetamorphosed or weakly metamorphosed shales, Sandstone and limestone |
| 5 | Medium hard Abrasive Moderately fractured to slightly broken | Limestone and dolomite. Weathered granite and gneiss. Serpentinite and metaperidotite. |
| 6 | Medium hard Moderately abrasive Moderately fractured to slightly broken | Unmetamorphosed or weakly metamorphosed diorite, Gabbro, peridotite and gneiss. Basalt, andesite. |
| 7 | Medium hard - hard Moderately abrasive Slightly fractured to competent | Metabasalt, amphibolite. Metamorphosed diorite and gabbro. Diabase. |
| 8 | Hard Slightly abrasive Competent | Quartz rich skarn. Granite and pegmatite |
| 9 | Very hard Slightly abrasive Very competent | Metamorphosed granitic rock and quartz rich gneiss. |
| 10 | Extremely hard Non-abrasive, fine grained Very competent | Chert and jasperite. Quartzite. Highly metamorphosed volcanic. |
