Fracture and Fatigue of Polycrystalline-Diamond Compacts
- Kris Zacny (Honeybee Robotics)
- Document ID
- Society of Petroleum Engineers
- SPE Drilling & Completion
- Publication Date
- March 2012
- Document Type
- Journal Paper
- 145 - 157
- 2012. Society of Petroleum Engineers
- 5.3.4 Integration of geomechanics in models
- wear, polycrystalline diamond compact, PDC, drill bit, fracture
- 3 in the last 30 days
- 841 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 5.00|
|SPE Non-Member Price:||USD 35.00|
Four different batches of polycrystalline-diamond compacts (PDCs) were tested under monotonic and cycling loadings. Initially, the mean load to fracture was recorded for each batch. In fatigue tests, the specimens were preloaded to between 75 and 95% of a batch mean static (S) strength and the R-value of 0.1 was used with frequencies of 10 and 20 Hz. It was found that some PDCs sustained greater than 106 cycles without fracturing. It was also noted that fracture force was reduced by 10 to 35% after the specimens were subjected to cyclic loading. This could indicate that fatigue weakens the structure of the PDC material. Tests conducted on two opposing edges of the same PDC buttons showed that the fracture on one side does not affect the strength of the opposing side. Thus, PDCs whose fracture or wear on flat areas is relatively small can be salvaged from the old bits, rotated 180°, and then rebrazed. Investigation of the fracture surface using a scanning-electron microscope (SEM) revealed that the fracture followed a transgranular path.
|File Size||10 MB||Number of Pages||13|
Brookes, C.A., Brookes, E.J., and Howes, V.R. 1990. Some MechanicalProperties of Diamond--A Perspective View. In Science and Technology of NewDiamond, ed. S. Saito, O. Fukunaga, and M. Yoshikawa, Section III, 261-272.Tokyo, Japan: KTK Scientific Publishers/TERRAPUB. http://www.terrapub.co.jp/e-library/nd/index.html.
Dunn, K.J. and Lee, M. 1979. The fracture and fatigue of sintered diamondcompact. J. Mater. Sci. 14 (4): 882-890. http://dx.doi.org/10.1007/bf00550720.
Glowka, D.A. and Stone, C.M. 1986. Effects of Thermal and Mechanical Loadingon PDC Bit Life. SPE Drill Eng 1 (3): 201-214.SPE-13257-PA. http://dx.doi.org/10.2118/13257-PA.
Hall, H.T. 1970. Sintered Diamond: A Synthetic Carbonado. Science 169 (3948): 868-869. http://dx.doi.org/10.1126/science.169.3948.868.
Hibbs Jr, L.E. and Lee, M. 1978. Some aspects of the wear of polycrystallinediamond tools in rock removal processes. Wear 46 (1):141-147. http://dx.doi.org/10.1016/0043-1648(78)90116-3.
Hibbs, L.E. Jr. and Flom, D.G. 1976. Geothermal Compax drill bitdevelopment. Semiannual technical report TID-28702, Contract No.EX-76-C-01-2360, General Electric Company, Schenectady, New York (31 December1976). 10.2172/6548255, http://www.osti.gov/bridge/servlets/purl/6548255-o1BxTc/
Hibbs, L.E. Jr. and Wentorf, R.H. 1974. Borazon and Diamond Compact Tools.High Temperatures--High Pressures 6: 409-413.
Lin, T.-P., Hood, M., Cooper, G.A., and Smith, R.H. 1994. ResidualStresses in Polycrystalline Diamond Compacts. J. Am. Ceram. Soc. 77 (6): 1562-1568. http://dx.doi.org/10.1111/j.1151-2916.1994.tb09757.x.
Sneddon, M.V. and Hall, D.R. 1988. Polycrystalline Diamond: Manufacture,Wear Mechanisms, and Implications for Bit Design. J Pet Technol 40 (12): 1593-1601. SPE-17006-PA. http://dx.doi.org/10.2118/17006-PA.
Teayaert, J. 1969. The Physical and Chemical Properties of Diamond.Presented at the Industrial Diamond Conference, October 1969.
Wentorf, R.H., DeVries, R.C., and Bundy, F.P. 1980. Sintered SuperhardMaterials. Science 208 (4446): 87-880. http://dx.doi.org/10.1126/science.208.4446.873.
Wilks, W. and Wilks, J. 1991. Properties and Applications of Diamond.Woburn, Massachusetts: Butterworth-Heinemann.