CORE DRILLING AND ROCK

Stone Assistance works for several years on the study of the performance of small diameter drill bits (<1 cm) particularly in the context of the characterization of mechanical properties of materials by micro-drilling technique.

With this experience, two drilling benches were developed to study the performance of drill bits and coring.

 

These test benches used to test both prototype tools as tools commercially available.

Our approach is :

  • Characterization of the mechanical properties of rocks

  • Performance characterization tools by laboratory test drilling

  • Definition of optimum drilling parameters

  • Performance monitoring on site using onboard instrumentation on the drilling machine

                                                               LABORATORY TESTS


Laboratory drilling tests determine the performance (penetration rate and specific energy ) that can be achieved with a tool according to the technological parameters which are taxed ( weight on bit and rotational speed ) . The establishment of a characteristic of the tool eventually to define precisely the optimum drilling parameters , as well as the necessary power. Comparing the responses of various drilling tools also select the tool that is most efficient .

 Comparison of the response curves of the same tools

 


Stone Assistance is based on this experimental approach both to define drill parameters to be respected , as to suggest changes to the design of tools , or select items to place on the cutting tools. In all cases , the objectives are to improve drilling performance.

                                                    Instrumentation on site

 

Stone Assistance also offers its services for instrumentation and performance monitoring of drilling machines in order to allow operators to increase the performance of their drilling equipment.

                                                                 REFERENCES

For more information on the developed method , we recommend the following article

  • F. Dagrain, E. Lamine, R. Delwiche, N. Golard. Characterization of the performances of small diameter drill bits for the optimization of the drilling parameters. 2nd International Conference on Stone and Concrete Machining (ICSCM), Dortmund, Germany, 14-15 November 2013.

Contact us ,and we will send you a copy of this publication.

Stone Assistance SPRL

Dr Ir Fabrice Dagrain

 

+32 (0)494 89 32 51

info@stoneassistance.be

www.stoneassistance.be

BE 0546.726.939

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