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Performance of a new Diamond Drill Bit

Conference · · Soc. Pet. Eng. AIME, Pap.; (United States)
OSTI ID:5338116
Early in 1984 a new type of synthetic diamond drill bit was introduced. The bits, know as ballaset diamond bits, are designed for and work well in medium to hard, moderately abrasive formations such as limestones, dolomites, hard brittle shales, and sandstones. Two years of field tests, many in the overthrust belt, have proven that ballaset diamond bits offer faster rates of penetration, longer life on bottom and overall improved performance when compared to types 3, 4, 5, and 7; tungsten carbide insert bits in medium to hard formations like the Twincreek limestone and Nugget sandstones of the Overthrust Belt. The ballaset cutting elements are polycrystalline, synthetic diamond. They differ from other polycrystalline synthetic diamonds (diamond compact) such as General Electric's Stratapax, in that they are thermally stable up to 1200/sup 0/C. Other synthetic diamonds are thermally stable up to 800/sup 0/C. Recognizing that frictional wear is a major factor limiting the hardness and abrasiveness of diamond compact drillable formations, thermally stable ballaset diamond bits can now drill these formations.
Research Organization:
Norton Christensen Drilling Products
OSTI ID:
5338116
Report Number(s):
CONF-8405166-
Conference Information:
Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE12907
Country of Publication:
United States
Language:
English

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