发明授权
US09027416B2 Method and system for controlling tongs make-up speed and evaluating and controlling torque at the tongs 有权
用于控制钳子化妆速度和钳子扭矩控制的方法和系统

Method and system for controlling tongs make-up speed and evaluating and controlling torque at the tongs
摘要:
Make-up speed for a tongs drive system is monitored and controlled to maintain the speed within a limited target range either throughout the make-up process or during the final portion of the make-up process, thereby improving make-up consistency and allowing for improved evaluation or torque during the make-up process. An encoder generates speed and position data during the make-up process. The speed data is compared to a target speed, which is based on rod and/or tongs characteristics. If the speed does not match the target speed or is not within a range of the target speed, a signal is transmitted to the tongs drive to adjust the speed accordingly. Furthermore, position data from the encoder, or other position sensors, provide position data for the rod during the make-up process to limit or vary the speed control parameters during different portions of the make-up process.
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