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These are rugged bits with no moving parts made of either steel on Tungsten carbide head for different formation, configuration of the head depends on type of formation, the depth of drilling, wight of bits ( WOB) and ROP and other operation factors. The main factor on design of PDC Bits is cutting formation, number of blades and size of cutters; they are widely used in direction drilling.
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Process of manufacturing PDC Bit in cylinder sazi
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1_ PROCUREMENT OF WELDING MATERIAL.
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2_ MANUFACTURING & WELDING OF THE STEEL UPPER SECTION.
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3_ QUALITY CONTROL INSPECTION.
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4_ RE- WORK WELD JOIN FLASH.
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5_ G… GAGE CUTTERS ON … GRINDER.
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6_ INSPECTION OF NOZZLE … ADS ADS AND … GROOVE.
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7_PRESSURE TESTING OF BIT BOUDY AND WELD JOINTS.
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8_ PAINTING & PACKING.
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9_ BIT BREAKERS MANUFACTURING.
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INTRODUCTION TO PDC BITS
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Polycrystalline diamond compact, or PDC, is one of the most important material advances for oil drilling tools in recent years. Fixed-head bits rotate as one piece and contain no separately moving part. When fixed head bits use PDC cutters, they are commonly called PDC bits. Since their first production in 1976, the popularity of bits using PDC cutters has grown steadily and they are, today nearly as common as roller cone bits.
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PDC Bits are designed and manufactured by two, structurally dissimilar, approaches: Matrix Body Bit and Steel Body Bits. The two provide significantly different capabilities and a choice between them would be decided by the nature of end needs, both types having certain advantages.
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“Matrix” is a very hard, rather brittle composite material comprised of tungsten carbide grains metallurgically bonded with a softer, tougher, metallic binder.
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Steel is metallurgically an opposite to matrix: it is capable of withstanding high impact loads. But is, relatively soft and without protection, would protection, would quickly fail by abrasion and erosion.
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Arcs , Rotosteer , Standard , Quad-D are smith PDC bits that manufactured in cylindersazi Tehran company.
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