Hebei Zhiwei Petroleum Equipment Coltd

4 5/8&#*4; ZW **7G tricone bit for rock drilling bit Basical Specific

6 1/2&#*4; ZW **7G tricone bit for rock drilling bit Basical Specif

6&#*4; ZW**7G tricone bit for rock drilling bit Basical Specificati

6 4 wings chevron drilling drag drill bit for water well Product Description Drag bit features 1,

7 7/8&#*4; ZW **7G tricone bit for rock drilling bit Basical Specif

7 7/8&#*4; ZW**7G tricone bit for rock drilling bit Basical Specifica

8 1/2&#*4; ZW **7G tricone bit for rock drilling bit Basical Specific

8 1/2&#*4; ZW**7 tricone bit for rock drilling bit Basic Specificat

8 1/2 3 wings chevron drilling drag drill bit for water well Product Description Drag bit features 1,

9 1/2&#*4; ZW**7 tricone bit for rock drilling bit Basic Specificat

Basic Specification Size of Rock Bit 9 1

9 1/2&#*4; ZW**7G tricone bit for hard rock drilling bit Basical Spec

9 5/8 3 wings chevron drilling drag drill bit for water well Product Description Drag bit features 1, A

9 7/8&#*4; ZW**7G tricone bit for rock drilling bit Basical Specifi

*0 5/8&#*4; ZW**7 tricone bit for rock drilling bit Basical Specifi

*1 5/8&#*4; ZW**7 tricone bit for rock drilling bit Basical Specifica

*1 5/8&#*4; ZW**7G tricone bit for rock drilling bit Basical Specific

Table of classification of formation hardness and bit selection Roller cone bit IADC

*2 1/4&#*4; ZW **7G tricone bit for rock drilling bit Basical Specifi

Basical Specification Size of Rock Bit *2