Study of the Hydraulic Performance of Drill Bits Using a Computational Particle-Tracking Method
- Ali Moslemi (National Oilwell Varco) | Goodarz Ahmadi (Clarkson University)
- Document ID
- Society of Petroleum Engineers
- SPE Drilling & Completion
- Publication Date
- January 2014
- Document Type
- Journal Paper
- 28 - 35
- 2014.Society of Petroleum Engineers
- 1.7.7 Cuttings Transport, 1.5 Drill Bits, 1.6 Drilling Operations, 1.5.4 Bit hydraulics
- hydraulic performance, drill bits, particle tracking, CFD, drill bit cleaning
- 2 in the last 30 days
- 909 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 5.00|
|SPE Non-Member Price:||USD 35.00|
The hydraulic performance of fixed-cutter drill bits was studied with the ANSYS-FLUENT code (ANSYS 2012). Cuttings were modeled as spherical particles that were injected from the bottom of the hole, and discrete particle modeling (DPM) was used to track the cuttings in which particle/particle interaction is ignored. The ratio of average particle velocity to average annulus fluid velocity, referred to as the cuttings-transport ratio (Ct), was then evaluated to study the hydraulic performance of drill bits under different conditions. The simulation results show that Ct increases as nozzle-jet velocity and HSI (hydraulic horsepower per square inch of bit) increase. Comparing Ct with rate-of-penetration (ROP) data available in the literature revealed that the rate of Ct change is less than that of ROP as HSI changes. Ct decreased slightly in a bit with seven nozzles when compared with the same bit with five nozzles with the same total flow area (TFA) of nozzles and inlet flow rate. Also, Ct was found to be insensitive to the nozzle-size arrangement and bit-waterway profile in the studied bit size. Overall, the current method (with the assumption of negligible particle/particle interaction) is more appropriate for predicting drill-bit hydraulic performance when drilling hard and nonreactive formations.
|File Size||891 KB||Number of Pages||8|
ANSYS, Inc. 2012. “ANSYS FLUENT User’s Guide,” Release 14.5.
Garcia-Gavito, D. and Azar, J.J. 1994. Proper Nozzle Location, Bit Profile, and Cutter Arrangement Affect PDC-Bit Performance Significantly. SPE Drill & Compl 9 (3): 167–175. http://dx.doi.org/10.2118/20415-PA.
Glowka, D. 1983. Optimization of Bit Hydraulic Configurations. SPE J. 23 (1): 21–32. http://dx.doi.org/10.2118/10240-PA.
Guo, B. and Liu, G. 2011. Applied Drilling Circulation Systems, Elsevier.
Hanna, C., Douglas, C., Asr, H. et al. 2011. Application Specific Steel Body PDC Bit Technology Reduces Drilling Costs in Unconventional North American Shale Plays. http://dx.doi.org/10.2118/144456-MS.
Hariharan, P.R. and Azar, J.J. 1996. PDC Bit Hydraulics Design, Profile Are Key To Reducing Balling. Oil & Gas J.
Holster, J.L. and Kipp, R.J. 1984. Effect of Bit Hydraulic Horsepower on the Drilling Rate of a Polycrystalline Diamond Compact Bit. J Pet Technol. 36 (12): 2110–2118. http://dx.doi.org/10.2118/11949-PA.
Kendall, W.A. and Goins, W.C. 1960. Design and Operation of Jet Bit Programs for Maximum Hydraulics Horsepower, Impact Force, or Jet Velocity. Trans., AIME, 219: 238–247.
Kolle´, J.J. 2000. Hydraulic Drilling and Excavation of Rock, Tempress Technologies, Inc. Short Course S5, Seattle, Washington.
Lim, K.M. and Chukwa, G.A. 1996. Bit Hydraulics Analysis for Efficient Hole Cleaning. Paper SPE 35667 presented at the SPE Western Regional Meeting, Anchorage, Alaska, 22–24 May. http://dx.doi.org/10.2118/35667-MS.
Mensa-Wilmot, G. and Fear, M. 2002. Innovative Technology Improves Penetration Rates of PDC Bits in Shales Drilled at Great Depth With Weighted Water Based Mud Systems. Paper IADC/SPE 74526 presented at the IADC/SPE Drilling Conference, Dallas, Texas, 26–28 February. http://dx.doi.org/10.2118/74526-MS.
Morsi, S.A. and Alexander, A.J. 1972. An Investigation of Particle Trajectories in Two-Phase Flow Systems. J. Fluid Mechanics 55: 193–208.
Nazari, T., Hareland, G., and Azar, J.J. 2010. Review of Cuttings Transport in Directional Well Drilling: Systematic Approach. Paper SPE132372 presented at the SPE Western Regional Meeting, Anaheim, California, 27–29 May. http://dx.doi.org/10.2118/132372-MS.
Wells, M., Marvel, T., and Beuershausen, C. 2008. Bit Balling Mitigation in PDC Bit Design. Paper SPE 114673 presented at the IADC/SPE Asia Pacific Drilling Technology Conference and Exhibition, Jakarta, Indonesia, 25–27 August. http://dx.doi.org/10.2118/114673-MS.