3 Cone Bit

 

Milled Tooth

 

 

PDC

 

TCI

 

 

 

 

 

Steel Tooth

 

 

 

 

1S -- Long, widely spaced teeth for softest formation (soft          sediments, shales, clays, etc.)

 

1 -- Reduced spacing between teeth for shale, soft limestone,        loosely cemented sandstone, etc.

 

2M -- More teeth and shorter teeth for hard shales, sandstones,           limestones, etc.

 

3MT -- Short, closely spaced teeth for very hard rock (dolomite,              limestone, very hard shales, etc.)

 

3T -- Similar to "3MT" but teeth have "T" shape for slightly more          abrasive formations.

 

3H -- Features paired teeth on gage. High resistsance to abrasion          from formations with high silica content.

 

BIT CODE FORMATION TYPE

BIT

DIAMETER

 

  in.            mm.

1S

Very

Soft

111

1

Soft

 

121

2M

Medium

 

231

3MT

Medium Hard

311

3T

Hard

 

321

3H

Very

Hard

339

 

PIN

SIZE

2 7/8          73.0

 

 

X

 

X

 

 N 4 thd

2 15/16    74.6

 

 

X

 

X

 

 

 3               76.0

 

 

 

 X

 

 

 

 3 1/8        79.4

 

 

X

 

 

 

 

 3 1/4        82.6

 

 

 

 

 

 

 

 3 1/2        88.9

 

 

 

 X

 

 

 

 3 5/8        92.1

 

 X

 X

 

X

 

 2 3/8 API Reg

 3 3/4        95.3

 

 X

 X

 

 

 

 

 3 7/8        98.4

 

 X

 X

 X

X

X

 

 4              101.6

 

 X

 

 X

 

 

 

 4 1/4      108.0

 

 X

 

 X

 

 

 

 4 1/2      114.3

 

 X

 

 

 

 

 

 4 5/8      117.5

 

 X

X

 

X

 

 

 4 3/4      120.7

 

 X

X

X

X

X

2 7/8 API Reg

 4 7/8      123.8

 

 X

X

X

X

X

 

 5             127.0

 

 X

X

X

 

 

 

 5 1/8      130.2

 

 X

X

X

 

 

 

 5 1/4      133.4

 

 X

X

X

X

 

 

 5 1/2      139.7

 

 X

X

X

X

 

 

 5 5/8      142.9

 

 X

X

 

X

X

3 1/2 API Reg

 5 3/4      146.0

 

 X

X

 

X

X

 

 5 7/8      149.2

 

 X

X

X

X

X

 

 6             152.4

 

 X

X

X

X

X

 

 6 1/8      165.6

 X

 X

X

X

X

X

 

 6 1/4      158.8

 X

 X

X

X

X

X

 

 6 3/4      171.0

 

 

 

 

 

 

 

 7 1/2      190.6

 

 X

X

 

X

X

 

 7 7/8      200.0

 X

 

X

X

X

X

4 1/2 API Reg

 8 1/2      215.9

 

 X

 X

 

X

X

 

 8  3/4     222.3

 X

 X

X

X

 

X

 

 9             228.6

 X

 X

 X

X

X

 X

 

 9 7/8      250.8

 X

 X

 X

X

X

 X

6 5/8 API Reg

10 5/8     269.9

 

 X

 X

 

 

 X

 

12 1/4     311.2

 X

 X

 X

 

 

 X

 

13 3/4     349.3

 X

 

 X

 

 

 X

 

17 1/2     444.5

 X

 

 X

 

 

 

7 5/8 API Reg

 

 

 


  

 

 

 

 

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