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Extremely Hard Hughes Christense Style "Model" HR-89 HR-89

Extremely Hard Hughes Christense Style
Actual product may vary from image shown.
Extremely Hard Hughes Christense Style "Model" HR-89 HR-89
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  • Model: HR-89
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Manufacturer, Bit Name/Model Number:  HR-89

IADC Code: 817

Size Range (in): 7-7/8", 8-3/8", 8-1/2", 8-3/4", 9-7/8"

Recommended WOB (lb/in. Diameter): 3000-7000

Recommended Rotary Speed (RPM): 90-50

Special Features/Usage: GW

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