Oilfield tubular spin-in and spin-out detection for making-up and breaking-out tubular strings

A method for making up a threaded connection between an upper tubular and a lower tubular using a low-torque oilfield tubular spinner and a high-torque torque wrench, the low-torque and high-torque being relative to each other, the method comprising:

• holding the lower tubular with the high-torque torque wrench;
• frictionally engaging the upper tubular with the low-torque tubular spinner;
• operating a motor of the low-torque tubular spinner to spin-in and shoulder-up a tubular connection between the upper tubular and the lower tubular;
• establishing a threshold hydraulic system pressure that indicates a shouldered-up condition, wherein the threshold hydraulic system pressure is substantially equal to a maximum hydraulic system pressure;
• monitoring, with a detection system, a hydraulic system pressure of the motor during spin-in and shoulder-up;
• detecting the shouldered-up condition, with the detection system, when the maximum hydraulic system pressure is substantially reached;
• and
• maintaining the threshold hydraulic system pressure to operate the motor for a selected period of time when the threshold hydraulic system pressure is reached.