Kingdream TCI Tricone 8 1/2′′ Rock Roller Bit/ Rock Bit

• IADC: 437
• Formation: Medium
• Size: 8 1/2
• Inch: 215.9mm
• Color: Golden
• Customersized: Yes
• Transport Package: Wooden Case
• Specification: SGS
• Origin: Hebei
• HS Code: 82071990
• Production Capacity: 50000PS/Year

Product Description

1. Tricone bit cutting structure
Adopting new formula of new technology of the high quality hard alloy tooth, enhance the cutting teeth mechanical properties.

2. Tricone bit diameter structure
Using multiple gage protection structure: Die with multidrug trimming tooth (GT teeth), round back, claw back set have cemented carbide gear, surfacing resistance mo alloy, strengthen ZhaoJian and anterior apply welding, greatly improving the drill gage protection ability.

3. Tricone bit bearing structure
Adopting high precision with radial sliding, two way thrust bearings, ball tight. Tooth claw big shaft neck and two stop surface welding have wear-resisting alloy, cone big hole and two stop surface solution and silver inlaid special alloy, increase the abrasion resistance and resistance bearing vice occlusive ability, improve bearing ability of high speed vice adapt.

4. Tricone bit seal lubricants
Adopting advanced metal seal, greatly extend the drill life.

5. Tricone bit applicable
Metal seal bit stable performance, than common rubber seal bit longer life, suitable for underground power drill and high penetration rate turntable drilling. <o:p>

ROLLER  CONE BITS	ROLLER CONE BIT (M/H)		FORMATION HARDNESS	FORMATION	ROCK TYPE	COMPRESS STRENGTH
	WEM	OBM
111/124	15-30	18-33	Very soft	soft formation with sticky layers and low compressive strength	clay,silts, sands	<25 MPa
116/137 437	9-15	12-18	soft	soft formation with low compressive strength and high drill ability	claystone,marl, lignite,tuff, sandstone	25-50 MPa
126/139 517/527	4.5-9	6-12	Medium soft	soft to medium formation with low compressive strength interb dded with hard layers	claystone,marl lignite,sandstone silts anhydrrites tuff	50-75 MPa
211/217 517/537	2.5-6	3-6	Medium	medium to hard formation with high compressive strength and small abrasive layers	mudstone , limstone, anhydrites, sandstone	75-100 MPa
211/236 537/617	1.5-2.5	1.5-3	Medium hard	hard and dense formation with very high compressive strength but non-abrasive	limestone, anhydrites, dolomite	100-120MPa
311/347 627/637	1-1.5	1-1.5	Hard	hard and dense formation with very high compressive strength and some abrasive layer	shale,sandstone ,siliceous, siltstone	100-200MPa
637 /737 /837	1	1	Very  hard	extremely hard and abrasive formtions	quartzite, lgneous ,rocks	>200MPa