Feature about oil rig drill bit size:

1. High-strength, high flexibility, high temperature and high wear resistance. 
2. High-precision metal seal. 
3. Locking roller ball, to adapt to high-speed. 
4. The use of high strength high toughness carbide teeth, 
5. Hours in the rotary cone bit with the impact, crushing and shearing the role of broken rock. 
6. Cone bit to adapt to the soft, medium and hard of various strata. 
7. Reasonable price and high efficiency.

Size and types: 
Size: Common sizes, 6.6-1/2, 7-7/8, 9-7/8, 10-5/8, 12-1/4 
Various sizes also can be made to order. 
Types: IADC Code, 412, 432, 532, 612, 632, 712, 732, 832 etc.

Non standard also can be available as your requirements.

If you have any questions,please do not hesitate to contact me.

Photos of oil rig drill bit size