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8 1/2 " steel tooth drill bit---kemei ,good service,sen sample if necessary
8 1/2 " steel tooth drill bit---kemei ,good service,sen sample if necessary

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1. 137 steel tooth drill bit
2. good price
3.high quality

As one the unique designated production enterprised, our company has a history of more than 40 years,there is the earliest specific research institution of drill bits where a group of experienced engineers and researchers available .

With the high technology,advanced management and reliable quality ,we have pas the API identification from 1986 and have got the API certificate.Besides ,in 1996 ,we got the ISO9001 quality management system certification.Our product has been marketed all over the world ,including our main land and other foreign countries like northern America, middle east ,eastern Asia,and south east Asia.

we put "quality first" first ,and supply different service for different requirments.

TCI bits series:

Soft formation TCI tricone bits:

The soft formation TCI tricone bits are used to drill low compressive strength, very soft formations. This bit maximized to use of both conical and chisel tungsten carbide inserts of large diameters and high projection. This cutting structure design, combined with maximum cone offset, results in high bit penetration rates. The deep intermesh of cutter rows prevents bit bailing in sticky formations.

 

Medium formation TCI tricone bits:

The medium formation TCI tricone bits features aggressive chisel tungsten carbide inserts on the heel rows and inner rows. This design provides a fast drilling rate and added cutting structure durability in medium to medium hard for mations. The HSN rubber O-ring provides adequate sealing for bearing durability.

 

Hard formation TCI tricone bits:

The hard formation TCI tricone bits can be used to drill hard and abrasive formations. Wear resistance tungsten carbide inserts are used in the outer rows to prevent loss of bit gauge. Maximum numbers of hemispherical shaped inserts are used in all rows to provide cutter durability and long life.

 

Medium hard formation TCI tricone bits:

The medium hard formation TCI tricone bits features robust chisel tungsten carbide inserts on the heel row and conical on the inner rows. This design provides a fast drilling rate and added cutting structure durability in medium to medium hard formations. The HSN rubber O-ring provides adequate sealing for bearing durability.

 

Steel tooth bits series:

Soft formation tooth bits:

The soft formations tooth bits are used to drill low compressive strength, soft formations. Long projection tooth lengths are used on high offset cones to provide the greatest penetrations rates possible. Wear resistance hard facing is used to control tooth wear. On the softest bit types this hard facing completely covers the bit teeth.

 

Medium hard formations tooth bits:

The medium hard formation tooth bits are used to drill high compressive strength, medium hard formations. Shoot projection teeth with reduced crest length are used in this series of bit designs. Durable hard facing is applied to reduce tooth wear.

 

 

 

Steel teeth drill bit table recommend parameter table

Structure characteristics

not sealed bearings rolling

rubber sealed rolling bearing

rubber seale sliding bearing

IADC

121

131

321

114

134

214

324

116

246

216

 

 

 

115

135

215

 

117

247

217

 

 

 

 

 

225

 

 

 

 

bit pressure(KN/mm)

0.35-0.7

0.35-0.7

0.45-0.75

0.3-0.65

0.35-0.7

0.4-0.75

0.45-0.75

0.35-0.7

0.45-0.8

0.45-0.8

revolving speed(r/min)

180-80

150-80

110-60

150-60

120-60

120-60

100-50

150-60

70-

50

80-60

  

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