Drill Bit Sizes 11 7/8" Steel Tooth Bit

Model

STEEL TOOTH BIT

IADC CODE

116 117 12 6127 136 137 216 217 226 226 316 317

326 327 336 337 115 125 135 215 225 235 315 325

335 114 124 214 314 111 121 131 346 347

available sizes:

From 2 7/8 to 26”

larger sizes for hole opener bit ,reamer bit

advantage

most favourable price and best qualtity

bearing type:

sealed bearing and non-sealed bearing

HJ(metal sealed journal bearing)

HA (rubber sealed journal bearing

aircooled bearing type

Formation or layer

soft ,medium soft ,hard,medium hard,very hard formation

Button size (extra features)

Button bit,saw teeth

1) Y-Conical teeth

2) X-chisel teeth

2) 3)K- wide teeth

4)G- Gague protection

Material

Tungsten Carbide

Packing

fumigation free of wooden case

Payment terms

T/T(30% downpayment and 70%balance before shipping.)

Delivery terms

By sea or by air

Delivery time

Within 7-15 work days

Main market

Canada, USA,Middle east ,Africa,Europe

IADC

WOB

(KN/mm)

RPM

(r/min)

Applicable Formations

111

0.3~0.75

200~80

Very soft formations with low compressive strength and high drillability,

such as clay, mudstone, chalk, etc.

121

0.3~0.85

200~80

Soft formations with low compressive strength and high drillability,

such as mudstone, gypsum, salt, soft limestone, etc.

131

0.3~0.95

180~80

Soft to medium formations with low compressive strength and high drillability,

such as medium soft shale, hard gypsum, medium soft limestone,

medium soft sandstone, soft formation with harder interbed, etc.

211

0.35~0.95

180~80

Medium formations with high compress strength, such as medium soft shale,

hard gypsum , medium soft limestone, medium soft sandstone,

soft formation with harder interbed, etc.

241

0.35~0.95

180~70

Medium hard formations with high compressive strength, such as abrasive shale,

limestone, sandstone, dolomite, hard gypsum, marble,etc

321

0.4~1.0

150~70

Hard semi-abrasive formations, such as abrasive shale,limestone,sand stone,dolomite,

hard gypsum,marble,etc.

Note: The upper limits of WOB and RPM in above table should not be used simultaneously.