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Welcome to the website of Jiangxi Feilong Rock Bit Manufacture Co., Ltd.!

Teeth of steel tooth bits

2021-12-0120Author:Jiangxi Feilong Rock Bit Manufacture Co., Ltd.

1、Summarize

Teeth of steel tooth bits are made from the bit cones by milling. Most teeth are wedge-shaped. Tungsten carbide particle hardfacing is liberally applied to the working face and back cone of the teeth.

2、Structural features

Steel tooth bit is a tri-cone rock bit with roller bearing for oil well drilling. Tungsten carbide particle hardfacing is liberally applied to the teeth surface. The bearing system is suitable for high rotary speed. It can perform high PRM, long working life and reliable drilling in appropriate formations. It can be adaptable from soft to middle medium formations, widely used in oil-well drilling, mining, geological prospecting, hydrogeologic prospecting, piling, geothermal exploitation, water-well drilling etc.

Apply high abrasion resistant alloy sand on the face of palm and teeth to ensure the long working life.

Optimized teeth placement, height and shapes guarantees the well capacity of cutting and excellent cutting speed.

3、Recommended drilling parameters

Formation

Bit Type

Drilling Weight 

 (KN/mm)

Rotary Speed

(r/m)

Very soft: such as soft marl, clay, salt, etc.

111

0.4-0.7

180-90

Soft: such as clay, marl, soft sandstone, salt,etc.

121

0.45-0.75

180-90

Soft: such as clay, marl, soft sandstone, salt,etc.

127

0.45-0.75

180-90

Medium soft: such as shale, marl,sandstone,soft limestone, etc.

131

0.5-0.75

120-60

Very soft: such as soft marl, clay, soft sandstone, salt, etc.

114

0.4-0.7

120-45

Soft: such as clay, soft shale, marl, salt, etc.

124

0.5-0.85

120-45

Note: The upper limits of drilling weight and rotary speed recommended in above table could not be used at the same time.

4、Main models

Bit Size Diameter

Bit Type

inch

mm

3 5/8

92.1

GY126

3 3/4

95.3

GY126

3 7/8

98.4

GY131

4 1/2

114.3

GY126

4 5/8

117.5

GY126

8 1/2

215.9

GY121、GY114、GY124、GY127

9 1/2

241.3

GY127

9 5/8

244.5

GY121、GY124、GY127

9 7/8

250.8

GY127

12 1/4

311.2

GY121、GY124、GY126、GY127L

13 3/4

349.3

GY127、GY127L

15

381

GY127、GY127L

17 1/2

444.5

GY121、GY124、GY125、GY127L

26

660.4

GY111