6 1/2″ Tricone Bit for HDD

6 1/2″ Tricone Bit for HDD IADC637

 

产品参数   Products Specification TCI Bit 6 1/2″ IADC637
外径    SIZE	mm	165.0
	inch	6 1/2
扣型(REG)            Thread（REG）		3 1/2
重量 毛/净(kg)        Weight  G/N（kg）		21/20
产品高度(mm)        Height (mm)		300
包装尺寸 (mm)       Package Size (mm)		190*175*365
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）		60～220
钻压（KN/mm）      WOB（KN/mm）		0.35～1.0
上扣扭矩（KN.m）    Make Up Torque（KN.m）		9.5～12.2
喷嘴外径（mm）      Nozzle Size(MM)		23.50±0.05

What does “IADC637” mean?

 

It is a standardized classification code for drilling equipment, specifically tricone roller drill bits, established by the International Association of Drilling Contractors (IADC).

The 1st digit means what lithology it is for, in some extent it also means “bit type” or “cutter/tooth type”. “4-6 ” means T.C.I. (Tungsten Carbide Insert) drill bit. Digit “6”‘s working lithology description is “Medium hard with harder more abrasive steaks“.

The 2nd digit “3” means the lithology grade (1,2,3,4). The bigger the grade number is, the harder the ground layer is.

The  3rd digit “7” means internal structure feature of the tri-cone bit. “7” means “Gage Protection and Jounal Bearing“.

 

How is the bit 6 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  6 1/2″ refers to the diameter of the bit’s head. 6 1/2” bit commonly works with 95mm mud motor, 73 or 89mm drill rods and a drill rig with pullback force less than 60 tons.

Different shapes and applications of Tungsten Carbide Insert (TCI Tooth/Cutter).

 

Tungsten carbide insert bits, also known as TCI bits, are made by pressing cylindrical sintered tungsten carbide inserts with different tip shapes into precisely machined holes on forged cone shells. These inserts form the cutting structure of the bit.

TCI bits are highly resistant to wear and can handle heavy loads, making them durable. They perform especially well in hard, abrasive formations like flint and quartzite.

These bits are versatile and work well in a wide range of formations. They are widely used in oil drilling due to their effectiveness and reliability.

Currently, there are more than ten common insert shapes used in TCI bits both domestically and internationally. These include spherical, chisel, conical, wedge, spoon, conical-spoon, offset spoon, side wedge, and flat-top shapes. Different insert shapes are chosen based on the specific formation and rock type.

• Spoon-shaped inserts: Suitable for very soft to medium-soft formations.
• Wedge-shaped inserts: Ideal for soft to medium-hard formations.
• Conical inserts: Best for medium-hard formations.
• Chisel-shaped inserts: Designed for hard formations.
• Spherical inserts: Effective in hard to extremely hard formations.

Choosing the right insert shape ensures optimal performance and efficiency in drilling operations.

Other Q&A

 

Q: What is the closest port for marine freight for you?

A: Tianjin Xingang Port.

 

Q: Is metal-sealed tricone bit better for tougher or more abrasive formations?

A: Yes. Bearing failure is one of common failures theoretically. Tri-cone bits with metal-sealed bearing last longer in very tough conditions.

 

Q: In China many people tell me they have composite-sealing bearing drill bits. What is composite sealing?

A: Composite seal is still classified as “rubber seal” in fact. It’s an upgraded sealing structure based on rubber seal, but not same as metal seal. In KINGDREAM’S classification, it’s an evolutionary rubber seal type.