Super Hard, Super Thick Diamond Cutters for Hard Rock Drilling - Development and Test Results


Christopher J. Durrand, Marcus R. Skeem, Ron B. Crockett and David R. Hall

Key Words:

diamond cutters, drilling


Stanford Geothermal Workshop




Emerging Technology



File Size:


View File:


Throughout the history of oilfield drilling, workers have tried to improve drill bit mechanical efficiency. Various cutting theories, designs and materials have been implemented to increase ROP, wear resistance and overall bit life. The advent of the PDC cutter in the mid 1970ís started the gradual movement away from the roller cone bit to the shear cutter bit. The geometry of the PDC (Poly-Crystalline Diamond Compact) cutter changed the cutting mechanics from a point load or crushing of the rock to a transverse shearing motion. PDC bits have a number of advantages over roller cone bits in some environments and in many applications significantly outperform them. However PDC bits in geothermal drilling remains a field of relatively limited experience and is an area where PDC fixed cutter bits underperform compared to roller cone bits. A new, hard, thick, shaped Stingerô PDC has been invented that aims to provide a link between crushing and shearing of rock to improve both ROP and overall cutter life. This paper describes the testing of such a cutter and preliminary work on Stinger populated drill bits aimed to enhance ROP in geothermal and EGS applications.

ec2-44-200-101-84.compute-1.amazonaws.com, you have accessed 0 records today.

Press the Back button in your browser, or search again.

Copyright 2010, Stanford Geothermal Program: Readers who download papers from this site should honor the copyright of the original authors and may not copy or distribute the work further without the permission of the original publisher.

Attend the nwxt Stanford Geothermal Workshop, click here for details.

Accessed by: ec2-44-200-101-84.compute-1.amazonaws.com (
Accessed: Monday 02nd of October 2023 08:17:45 AM