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In this study, experimental study of profile geometry effect on Polycrystal Diamond Compact (PDC) drill bits performance and durability was conducted. In an extensive field study, three samples of bits was choosed among NIOC bits collection. PDC bit profile consists of apex, cone, nose, shoulder and gage, which all are effective on stability, penetration rate, aggressiveness and durability. Verification of the effect of PDC bit profile geometry needs to first determine the exact geometry. Complicated geometry of these PDC bits was obtained by 3D-scan and cloud of points. Then cutters arrangement of the profile was produced. In experimental study, field test of these bits was conducted in same condition (WOB, ROP, fluid velocity and drilling mud weight) in Ahwaz oil rig in Asmari formation. Drilling metrage and penetration rate was measured and the bits dull grading based on IADC standards was determined. Results of the bits test showed the effect of profile geometry on PDC bits performance and durability. optimization of profile geometry of PDC bits causes an increase in penetration rate, stability and durability.

Keywords: PDC drill bit, profile geometry, performance, durability

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