8 1/2″ HDD Tri-cone Bit IADC637 Roller Bit
This hdd tricone drill bit is one the most used bits for rock layers. Commonly works with 165mm mud motor, 127mm drill rods and a drill rig with pullback force of 200 tons.
| 产品参数 Products Specification HDD Tri-cone Drill Bit 8 1/2″ IADC637 rubber-seals | ||
| 外径 SIZE | mm | 215.9 |
| inch | 8 1/2 | |
| 扣型(REG) Thread（REG） | 4 1/2 | |
| 重量 毛/净(kg) Weight G/N（kg） | 42/38 | |
| 产品高度(mm) Height (mm) | 350 | |
| 包装尺寸 (mm) Package Size (mm) | 290*290*530 | |
| 密封形式（金属/橡胶）Seal Type (metal/rubber) | 橡胶 Rubber | |
| 轴承结构（滑动/滚动）Bearing (Journal/Roller) | 滑动 Journal | |
| 附加特征 Optional Feature | 掌背强化 Gage protection | |
| 使用参数 Recommended Operating Parameters | ||
| 转速（r/min） RPM（r/min） | 40～80 | |
| 钻压（KN/mm） WOB（KN/mm） | 0.5～1.2 | |
| 上扣扭矩（KN.m） Make Up Torque（KN.m） | 16.3～21.7 | |
| 喷嘴外径（mm） Nozzle Size(MM) | 33±0.05 | |
Features of this IADC637 HDD Tri-cone Drill Bit
Large radius scoop compacts in inner row, spherical compacts in outer row.It is suitable for medium hard with high compressive strength and high abrasiveness, such as limestone,dolomite, sandstone and chert, etc.
How is the bit 8 1/2″ IADC637 typically used in trenchless drilling or directional drilling?
“637” is one the most used bit codes for rock layers. If you are drilling rocks (not that hard or abrasive), “637” is right for you. Besides, as “IADC637″ is broadly used, so it is massively produced as well. You can easily find goods from your supplier.
The size of 8 1/2″ refers to the diameter of the bit’s head. 8 1/2” bit commonly works with 165 mud motor, 127mm drill rods and a drill rig with pullback force 0f 200 tons.
How to distinguish metal-seal hdd ticone bit from rubber-seal hdd tricone bit
From the appearance, it is really hard to differentiate the two types. Because the bearing struture is invisiable!
But we still could check the bottom printing to identity whether it is a metal-seal roller bit or a rubber-seal one. Check the figure 1. below.
“XM” means it is a metal-seal tricone bit. “M” mean “metal”.
“XA” or “XE” means it is a rubber-seal one.
Of course, beside from the bottom, you can also check the model info from the outer package. But sometimes you can not remember which is its own package.
Other Q&A
Q: What are your products always available in stock, or those always need time to manufacture?
A: Typically, they are tri-cone bits. We stock from popular models directly from KINGDREAM factory, like 6”/6 ½”/8 ½”/9 1/2”/12 ¼” IADC537/617/637.
On the other hand, hole openers(reamers) always need to be customized. Because customers’ drill rigs vary so much, we need customize the thread types for them on the reamers. Especially for rock reamers, the customization not only comes from the thread type, but also from the IADC code and the distribution density of the roller cones. Lastly, sometimes we need design the reamers according to customer’s drilling plan, especially the design of centralizer size.
As for other products, it depends. Mud motor is more like to be available as there’s not so much customization. Kindly inquire from us if you want to check our stock status.
Q: What are the terms of payment?
A: For commodities in stock, we request a 100% prepayment by TT, upon which, we’ll deliver in 3-5 days; but if the commodities need some time to manufacture, a 30% prepayment by TT shall be transmitted, and the rest shall be transferred before shipment.
Q: Do you have experience of global delivery?
A: Yes. From America to the middle east, from Africa to India, from Brazil to Australia, we are familiar with how to deliver satisfactory to all of you.
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