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COLD ROLLING |
Cold rolling is the prestressing of the thread roots of the drill collar joint and results in a more durable connection. A hydraulic ram forces a roller into the thread root and follows the root down the thread spiral. The roller has the same contour as the thread root and the pressure between the roller and the root compresses the metal in the thread root. This compression of the fibers in the thread root results in a stronger connection that can withstand bending stresses longer without fatigue damage. |
5050 Ashley Court Houston, Texas 77041 Telephone (713) 466-0088 / (800) 475-8665 www.cuttingtools.com info@cuttingtools.com |