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PDC (polycrystalline diamond compact) bits are a type of drill bit used in the oil and gas industry for drilling oil and gas wells. They are designed to be more efficient and durable than traditional roller cone or tungsten carbide insert (TCI) bits. PDC bits are made up of a steel body and cutting surface, which is made of synthetic diamond material. The cutting surface, or cutter, is made up of hundreds of tiny diamond crystals that are sintered together under high pressure and high temperature.The typical PDC bit has several key components, including: • The body: The body of the bit is typically made of steel and is designed to provide structural support for the bit and to transmit drilling energy to the cutters. • The cutters: The cutters are the component of the bit that are in direct contact with the rock and are designed to cut through the rock. They are typically made of synthetic diamond material and are designed to be durable and efficient. • The nozzles: The nozzles are the component of the bit that are used to direct drilling fluid to the cutters and to cool and lubricate the bit. They are typically made of tungsten carbide or other durable materials. • The gauge protection: The gauge protection is the component of the bit that is located at the bottom of the bit and is designed to protect the gauge of the bit from damage. They are typically made of tungsten carbide or other durable materials.
PDC Bit Engineering SpecificationsThe engineering specifications for PDC bits are: • Diameter: typically from 3 7/8" to 17 1/2" • Cutting structure: typically from 8 to 24 blades • Cutter size: typically from 3mm to 8mm • Standard: API RP 7G, ISO 10424
PDC bits are designed to be more efficient and durable than traditional roller cone or tungsten carbide insert (TCI) bits. Their cutting structure, made of hundreds of tiny diamond crystals perform well against hard surfaces.