Presenter Information

Azmi Zainal Adnan


Geosciences and Geological and Petroleum Engineering

Meeting Name

4th Annual UMR Undergraduate Research Symposium (1994: Mar. 23, Rolla, MO)


The petroleum industry has seen many technological advances since oil was first discovered in the 19th century. Some of the current technological advances in the industry include cuttings transport, drillbit design, logging, and horizontal and directional drilling. Currently, research projects are being done at UMR to find ways to further reduce drilling costs and develop new technology that could improve the drilling effectiveness. One such project is the development of high- pressure waterjet / hybrid bits to replace the conventional mechanical drillbits. In this design, the advantages of waterjet penetration are combined with those of mechanical teeth cutting action..

At UMR, the project is under the overall direction of Dr. David A. Summers, a well-known researcher on the high-pressure waterjet technology, and Dr. AW. Iyoho, an expert in the drilling technology. Preliminary results show that there are many advantages to high-pressure waterjet bits compared to conventional bits. Therefore, it is possible that the high-pressure waterjet technology could someday be used commercially in the mining and petroleum industries once the design is perfected.

This paper discusses advantages and problems related to the high-pressure waterjet/ hybrid bit technology and proposes a design to address the problems. The designs were developed in partial fulfillment of an advanced drilling course (PE314) taught by Dr. Iyoho.

Document Type


Presentation Date

23 Mar 1994