E21B10/06 - CPC Classification Index

ClassID:

135205 ⎘

E21B10/06 - CPC Classification

Classification description:

Drill bits; Core bits Roller core bits

Recent Application in this class:

20190390519

Rotary drilling tool and method for producing a bore in the ground

20190249497

Downhole tools with variable cutting element arrays

20150211303

Drill bits with anti-tracking features

20110315452

Drill bits with anti-tracking features

20110036639

Roller cone disk with shaped compacts