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

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