BQ NQ HQ PQ Boart Longyear Surface Set Diamond Core Bits For Faster
Drilling Stone
Surface-Set Diamond Bits are set with a singular layer of natural
or synthetic diamond utilizing a hard matrix compound on the face
of the bit. The diamond set design ensures sufficient overlap to
prevent premature wear of the matrix.
Surface-Set diamond bits are primarily recommended for use in
drilling relatively soft, abrasive, unconsolidated formations that
are not effectively drilled by impregnated diamond bits. They are
also recommended for use in drilling harder formations where the
available rotational speeds and bit loads are insufficient to use
impregnated diamond bits due to drilling equipment limitations.
Specifications:
1. All D.C.D.M.A. standards
2. Wireline series: AQ, BQ, NQ, HQ, PQ/BQ-3, NQ-2
3. T2 series: 46, 56, 66, 76, 86 and 101
4. T6 series: 76, 86, 101, 116, 131 and 146
5. T6S series: 76, 86, 101, 116, 131 and 146
6. B series: 46, 56, 66, 76, 86, 101, 116, 131 and 146
| Core bits | Reaming Shell |
| Size | O.D (mm) | I.D (mm) | Size | Set Diameter (mm) |
| AQ | 47.75/47.50 | 27.10/26.85 | AQ | 48.13/47.88 |
| AWG(AX) | 47.75/47.50 | 30.23/29.97 | AWG(AX) | 48.13/47.88 |
| AWM | 47.75/47.50 | 30.23/29.97 | AWM | 48.13/47.88 |
| BQ | 59.69/59.44 | 36.52/36.27 | BQ | 60.07/59.82 |
| BQ3 | 59.69/59.44 | 33.65/33.40 | BQ3 | 60.07/59.82 |
| BWG(BX) | 59.69/59.44 | 42.16/41.91 | BWG(BX) | 60.07/59.82 |
| BWM | 59.69/59.44 | 42.16/41.91 | BWM | 60.07/59.82 |
| NQ | 75.44/75.19 | 47.75/47.50 | NQ | 75.82/75.57 |
| NQ2 | 75.44/75.19 | 50.80/50.55 | NQ2 | 75.82/75.57 |
| NQ3/NQTT | 75.44/75.19 | 45.21/44.96 | NQ3/NQTT | 75.82/75.57 |
| NWG(NX) | 75.44/75.19 | 54.86/54.61 | NWG(NX) | 75.82/75.57 |
| NWM | 75.44/75.19 | 54.86/84.61 | NWM | 75.82/75.57 |
| NMLC | 75.44/75.19 | 52.12/51.87 | NMLC | 75.82/75.57 |
| HQ | 95.76/95.38 | 63.63/63.38 | HQ | 96.27/95.89 |
| HQ3/HQTT | 95.76/95.38 | 61.24/60.99 | HQ3/HQTT | --- |
| HWG(HX) | 98.98/98.60 | 76.33/76.08 | HWG(HX) | 99.36/99.11 |
| HMLC | 98.98/98.96 | 63.63/63.38 | HMLC | 98.20/97.80 |
| PQ | 122.30/121.80 | 85.09/84.84 | PQ | 122.81/122.43 |
| PQ3 | 122.30/121.80 | 83.18/82.93 | PQ3 | 122.81/122.43 |
| T2-76 | 76.12/75.87 | 61.82/61.57 | T2-76 | 76.50/76.20 |
| T2-101 | 101.12/100.80 | 83.82/83.57 | T2-101 | 101.50/101.20 |
| T6-76 | 76.12/75.87 | 57.12/56.87 | T6-76 | 76.50/76.20 |
| T6-101 | 101.12/100.80 | 79.12/78.87 | T6-101 | 101.50/101.20 |
| T6-131 | 131.19/130.80 | 108.13/107.00 | T6-131 | 131.57/131.19 |
