HR Series Rubber Sealed Bearing Bits
Journal bearing.Hardfaced head bearing surface.inner hole of cone is silver-plated.The load capacity and seizure resistance of the bearing is greatly improved.0 ring seal is made of the more wear resistance high saturated buna-N with the increased seal section and precisely designed sealing flflange in the cone sealing area increased the reliability of the seal.
HENGJI BIT SPECIFICATION | |
Bit Size | 11’’ |
IADC Code | 537 |
Series | HR |
Tooth type | TCI/tungsten carbide insert |
Connection | 6 5/8 API REG PIN |
Bearing | rubber sealed bearing |
Nozzle | three jet nozzles |
Rotary Speed(rpm) | 120~50 |
Weight on Bit(KN/MM) | 0.45~1.0 |
Application | water well,oil well,HDD,exploration,etc |
Formation | Soft to medium formation with low compressive strength,such as medium soft shale,medium soft limestone,medium soft sandstone,etc. |
Popular models | |
size | IADC CODE |
4 1/2’’(114.3mm) | 115 117 127 217 417 437 517 537 637 |
4 3/4’’(120.7mm) | 115 117 127 217 417 437 517 537 637 |
5 7/8’’(149mm) | 115 117 127 217 417 437 517 537 637 |
6’’(152mm) | 115 117 127 217 417 437 517 537 637 737 |
6 1/2’’(165mm) | 115 117 127 217 417 437 517 537 617 627 637 737 |
7 1/2’’(190mm) | 115 117 127 217 417 437 517 537 617 627 637 737 |
7 7/8’’(200mm) | 115 117 127 217 417 437 517 537 617 627 637 737 837 |
8 1/2’’(215.9mm) | 115 117 127 217 417 437 517 537 617 627 637 737 837 |
8 3/4’’(222.3mm) | 115 117 127 217 417 437 517 537 617 627 637 737 837 |
9 5/8’’(244.5mm) | 115 117 127 217 417 437 517 537 617 627 637 737 837 |
9 7/8’’(250.8mm) | 115 117 127 137 217 417 437 517 537 617 627 637 737 837 |
11 5/8’’(295.3mm) | 115 117 127 217 417 437 517 537 617 627 637 737 837 |
12 1/4’’(311.1mm) | 115 117 127 217 417 437 517 537 617 627 637 737 837 |
14 3/4’’(374.7mm) | 115 117 127 217 417 437 517 537 617 627 637 737 837 |
15 1/2’’(393.7mm) | 115 117 127 217 417 437 517 537 617 627 637 737 837 |
17 1/2’’(444.5mm) | 115 117 127 217 237 417 437 517 537 617 637 |
20’’(508mm) | 115 117 127 217 237 437 517 537 637 |
22’’(558.8mm) | 115 117 127 217 437 517 537 637 |
24’’(509.6mm) | 115 117 127 217 437 517 537 |