Analytical modeling of PDC single cutter-rock interaction under confining pressure

R. Rahmani, J. R. Smith, Arash Dahi Taleghani

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)

Abstract

Slow penetration rate is a major factor in the high cost of deep drilling operations worldwide. A contributing factor is the excessive energy required to create and transport rock cuttings under high confining pressure. This work describes a new analytical single cutter model of cutting rock under confining pressure that was adapted from a model of machining metal. The original model quantifies an increase in shear plane area resulting from an increase in friction on the cutter face and/or in back rake angle based on the principle of minimum energy. An adaptation of the model accounts for the effects of the confined shear strength of the rock and confining pressure-induced friction on the shear plane. Additional model terms were developed to account for the effect of specific dysfunctions, i.e. cutter balling and severe "global" balling. The model predicts distinctive characteristics of each condition: no dysfunction, cutter balling, and global balling in addition to unique changes in these characteristics as a function of confining pressure. The relevance of model predictions is supported by comparison to single cutter test results on shales.

Original languageEnglish (US)
Title of host publication46th US Rock Mechanics / Geomechanics Symposium 2012
Pages729-741
Number of pages13
StatePublished - Dec 1 2012
Event46th US Rock Mechanics / Geomechanics Symposium 2012 - Chicago, IL, United States
Duration: Jun 24 2012Jun 27 2012

Publication series

Name46th US Rock Mechanics / Geomechanics Symposium 2012
Volume1

Other

Other46th US Rock Mechanics / Geomechanics Symposium 2012
CountryUnited States
CityChicago, IL
Period6/24/126/27/12

Fingerprint

confining pressure
Rocks
rock
modeling
friction
Friction
deep drilling
Shear strength
shear strength
energy
Drilling
Machining
penetration
metal
prediction
Metals
cost
Costs

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology

Cite this

Rahmani, R., Smith, J. R., & Dahi Taleghani, A. (2012). Analytical modeling of PDC single cutter-rock interaction under confining pressure. In 46th US Rock Mechanics / Geomechanics Symposium 2012 (pp. 729-741). (46th US Rock Mechanics / Geomechanics Symposium 2012; Vol. 1).
Rahmani, R. ; Smith, J. R. ; Dahi Taleghani, Arash. / Analytical modeling of PDC single cutter-rock interaction under confining pressure. 46th US Rock Mechanics / Geomechanics Symposium 2012. 2012. pp. 729-741 (46th US Rock Mechanics / Geomechanics Symposium 2012).
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Rahmani, R, Smith, JR & Dahi Taleghani, A 2012, Analytical modeling of PDC single cutter-rock interaction under confining pressure. in 46th US Rock Mechanics / Geomechanics Symposium 2012. 46th US Rock Mechanics / Geomechanics Symposium 2012, vol. 1, pp. 729-741, 46th US Rock Mechanics / Geomechanics Symposium 2012, Chicago, IL, United States, 6/24/12.

Analytical modeling of PDC single cutter-rock interaction under confining pressure. / Rahmani, R.; Smith, J. R.; Dahi Taleghani, Arash.

46th US Rock Mechanics / Geomechanics Symposium 2012. 2012. p. 729-741 (46th US Rock Mechanics / Geomechanics Symposium 2012; Vol. 1).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Rahmani R, Smith JR, Dahi Taleghani A. Analytical modeling of PDC single cutter-rock interaction under confining pressure. In 46th US Rock Mechanics / Geomechanics Symposium 2012. 2012. p. 729-741. (46th US Rock Mechanics / Geomechanics Symposium 2012).