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TECHNICAL PAPERS

Drillstring Stability Based on Variable Material Specific Force and Using a Sharp Three-Insert Polycrystalline Diamond Compact (PDC) Coring Bit

[+] Author and Article Information
M. A. Elsayed, L. F. Washington

Mechanical Engineering Department, University of Louisiana at Lafayette, Lafayette, LA 70504

J. Energy Resour. Technol 123(2), 138-143 (Nov 06, 2000) (6 pages) doi:10.1115/1.1367857 History: Received February 26, 1999; Revised November 06, 2000
Copyright © 2001 by ASME
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References

Dunayevsky, V. A., and Abbassian, F., 1995, “Application of Stability Approach to Bit Dynamics,” SPE Tech. Pap., Paper No. 30478, Conference and Exhibition, Dallas, TX.
Tlusty, J., and Polacek, M., 1963, “The Stability of the Machine Tool Against Self-Excited Vibrations in Machining,” ASME Production Engineering Research Conference, Pittsburgh, PA.
Zamudio, C. A., Tlusty, J. L., and Dareing, D. W., 1987, “Self-Excited Vibrations in Drillstrings,” SPE Tech. Pap., paper 16661, 62nd Annual Conf., Dallas, TX., pp. 117–123.
Dareing,  D., Tlusty,  J., and Zamudio,  C., 1990, “Self-Excited Vibrations Induced by Drag Bits,” ASME J. Energy Resour. Technol., 112, pp. 54–61.
Elsayed,  M. A., Wells,  R. L., Dareing,  D. W., and Nagirimadugu,  K., 1994, “Effect of Process Damping on Longitudinal Vibrations in Drillstrings,” ASME J. Energy Resour. Technol., 116, pp. 129–135.
Tlusty, J., 1999, Manufacturing Processes and Equipment, Prentice Hall, Upper Saddle River, NJ, pp. 518, 565.
Elsayed,  M. A., Dareing,  D. W., and Dupuy,  C. A., 1997, “Effect of Downhole Assembly and Polycrystalline Diamond Compact (PDC) Bit Geometry on Stability of Drillstrings,” ASME J. Energy Resour. Technol., 119, pp. 159–163.
Glowka,  D. A., 1989, “Use of Single-Cutter Data in Analysis of PDC Designs: Part 1—Development of a PDC Cutting Force Model,” JPT, J. Pet. Technol., 41, pp. 797–799, 844–849.
Dareing,  D., and Livesay,  B., 1968, “Longitudinal and Angular Drillstring Vibrations With Damping,” ASME J. Energy Resour. Technol., 90, pp. 671–679.
Elsayed, M. A., and Dareing, D. W., 1994, “Coupling of Longitudinal and Torsional Vibrations in a Single-Mass Model of a Drillstring,” Developments in Theoretical and Applied Mechanics, Vol. XVII, University of Arkansas, Fayetteville, AR, pp. 128–139.
Elsayed,  M. A., Dareing,  D. W., and Vonderheide,  M., 1997a, “Effect of Torsion on Stability, Dynamic Forces and Vibration Characteristics in Drillstrings,” ASME J. Energy Resour. Technol., 119, pp. 11–19.
Glowka,  D. A., 1989, “Use of Single-Cutter Data in Analysis of PDC Designs: Part 2-Development and Use of PDCWEAR Computer Code,” JPT, J. Pet. Technol., 41, pp. 850–859.
Tlusty, J., 1978, “Analysis of the State of Research in Cutting Dynamics,” CIRP Annals, Vol. 27/2, pp. 583–589.
Tlusy, J., Dareing, D., and Zamudio, C., 1988, “Progress Report No. 1, Vibrations of Drag Bits,” MLI Manuf. Lab. Report, Gainsville, Fl.
Elsayed, M. A., and Raymond, D. W., 2000, “Measurement and Analysis of Chatter in a Compliant Model of a Drillstinrg Equipped with a PDC Bit,” Proc., ASME ETCE Conference, New Orleans, LA., pp. 1–8.

Figures

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A typical cutter removing an undulated surface
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Specific force for Sierra White granite, sharp cutters
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Specific force for Berea sandstone, sharp cutters
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Cutter placement on the coring bit
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Development of the area removed by each cutter
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Vector diagram indicating change in material thickness δCij of the cut area Aij due to vibration
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Process damping force associated with area Aij whose thickness variation is δCij
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Measured FRF in the axial direction of Sandia’s hard rock drilling facility
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Correlation between measured vibration and relative instability, Berea sandstone, sharp cutters, WOB=500 lb
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Correlation between measured vibration and relative instability, Sierra White granite, sharp cutters, WOB=1500 lb

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