Finite element method for temperature distribution in synthetic diamond cutters during orthogonal rock cutting
The introduction of synthetic polycrystalline diamond compact (PDC) cutters for use as cutters on oil well drill bits by General Electric in 1973 was a significant advancement in drilling technology. To realize the full potential of this type of cutter a theoretical model of cutting heat transfer and wear for these cutters had to be developed. A cutting model developed in a previous study is used as the first step in developing a heat transfer model. The finite element method is used to solve the problem of simultaneous heat transfer in the rock chip and the tool. The model is verified by comparison with the single cutter experiments of Lee and Hibbs. The model suggested that a correlation existed in the experimental results of Lee and Hibbs between the velocity at which the wear of PDC drastically increased and the temperature at which the hardness decreased drastically. A significant conclusion from the results is that the heat flows from the tool into the chip and thus the chip actually helps in the cooling of the tool. Studies of the effect of film coefficient on the temperature of the tool suggest that there is an optimum cooling beyond which the decrease in temperature for an increase in cooling is insignificantly small. The maximum temperature is on the wear flat closer to the edge away from the cutting tip. The maximum temperature increased when the length of the wear flat increased. The largest contribution to the heat generation in the model is from the heat generation due to sliding friction on the wear flat.
- Research Organization:
- Kansas State Univ., Manhattan (USA)
- OSTI ID:
- 6183106
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
DRILL BITS
TEMPERATURE DISTRIBUTION
OIL WELLS
WELL DRILLING
CUTTING TOOLS
DIAMONDS
FINITE ELEMENT METHOD
HARDNESS
HEAT TRANSFER
MATHEMATICAL MODELS
RESERVOIR ROCK
ROCK DRILLING
SLIDING FRICTION
SYNTHETIC MATERIALS
WEAR
CARBON
DRILLING
DRILLING EQUIPMENT
ELEMENTAL MINERALS
ELEMENTS
ENERGY TRANSFER
EQUIPMENT
FRICTION
MATERIALS
MECHANICAL PROPERTIES
MINERALS
NONMETALS
NUMERICAL SOLUTION
TOOLS
WELLS
020300* - Petroleum- Drilling & Production