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Unformatted text preview: his case CCS is used.
There is a good correlation between the downhole data and the CCS. The “peaks” with high DSE values show a lot of
opportunities for improving the drilling efficiency on this particular well.
Including a particular bit hydraulic-related term in the specific energy correlation would allow a better understanding of the
complex-rotary drilling process. Putting together the mechanical (axial and torsional) and hydraulic components of the
specific energy, at the bit level, would give a more holistic approach for the bit-rock interaction while drilling. The rock is
broken by the mechanical energy component (axial plus torsional), and the pieces are removed underneath the bit by the
hydraulic component. The faster the rock pieces are removed, the less energy is wasted re-grinding cuttings already broken.
The experimental data suggests that the DSE can be used to identify inefficient drilling conditions. Fig. 19 shows a sketch
making a connection between the traditional ROP vs. WOB plot and the...
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This note was uploaded on 01/31/2014 for the course MOGE 9114 taught by Professor Thomod during the Spring '13 term at Memorial University.
- Spring '13