Dull Bit Grading Handbook – Great for Your Reference

Dull bit grading is a standard method to grade the bit and it will also help personnel to understand bit performance better. However, it is sometimes very difficult to understand the meaning of the codes showing in the grading because you’ve never seen these dull characteristics before.   Especially, there are new people who start to work in the oilfield therefore it is very critical to have them learn the correct way to do the bit grading in a short period of time.

dull-bit-grading-handbook-cover

One of my friends shares this very useful dull bit grading created by Smith Bit company and I can say that this is an excellent book to help you grade the bit correctly.

Let’s take a look in this book what inside

Roller cone dull bit grading part

roller cone dull bit grading part

System Structure

system structure

Dull Characteristics

Dull Characteristics

Images showing the dull characteristics of the bit – Every dull type has an image to show you how it looks like.  This part is extremely helpful for you.  This book also tells you causes of bit failure.

Images showing the dull characteristics

There is another part which is “Fixed Cutter Dull Grading”. This is applicable for PDC bits and diamond bits

 Fixed Cutter Dull Grading

Dull characteristics for fixed cutter bits

Dull characteristics for fixed cutter bits

Location on the bit structure

Location on the bit structure

Images demonstrate how it should look like for each dull characteristic of the fixed blade bit

 Images demonstrate dull characteristic of the fixed blade bit

 There is a lot of information from this book and you can download it from this link -> Dull Bit Grading Book

Please feel free to add any comments or suggest.

We wish this book would be advantage for you and your colleges.

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