Available sizes: | 4 5/8"(118mm), 5 7/8"(149mm), 6"(152mm), 6 1/2"(165mm), 6 5/8"(168mm), 7 1/2"(190mm), 7 7/8"(200mm), 8 1/2"(215.9mm), 9 1/2"(241mm), 9 5/8"(245mm), 11 5/8"(295mm), 12 1/4"(311mm), 13 5/8"(346mm), 14 3/4"(374mm), 15 1/2"(394mm) 16"(406mm), 17 1/2"(445mm), 18"(457mm), 26"(660mm) |
Model NO. | 437,447,517,527,537,547,617,637,737 |
IADC CODE | 116,117,126,127,136,137,216,217,316,317,346,347 |
RPM(r/min) | 140~60 |
WOB(KN/mm) | 0.35~1.0 |
Thread Connection | 7 5/8 reg pin |
Bearing type | Sealed bearing and non-sealed bearing HJ(metal sealed journal bearing) HA(rubber sealed journal bearing) Aircooled bearing type |
Applicable Formations | Soft formations with low compressive strength and high drillability, such as mudstone, gypsum, salt, soft limestone, etc |
Circulation system | Mud pump |
Material | Alloy steel, carbide |
Delivery terms | By sea or by air |
application | Petroleum and gas, water well, mining and tectonic industries, oil field, construction, geothermal, directional boring and underground foundation work |
1>Cutting Structure
The durability of premium tungsten carbide insert is improved with new formulas and new techniques for insert bit.
2>Gauge Structure
Multiple gauge protection with gauge trimmers on the heel of cone, tungsten carbide inserts and hardfacing on the shirttail increases gauge holding capability and bearing life.
3>Bearing Structure
High precision bearing with two thrust faces. Ball lock the cone. Hardfaced head bearing surface. Cone bearing inlaid with friction-reducing alloy and then silver-plated. Abrasion resistance and seizure resistance of the bearing are improved.
4>Seal and Lubrication
Premium O-ring, Optimal seal compression and curved seal structure can enhance the seal performance. The pressure compensator system and advanced grease can greatly increase the lubricating reliability.
5>Product Application
It can receive high WOB in the conventional drilling. It is suitable for various formations by matching cutting structure with different tooth shape, tooth density and tooth exposure height.
