Patent ID: 8074537

Claim:
An oilfield tubular spinner for an oilfield tubular torque wrench, the oilfield tubular spinner comprising: a powered spin roller including an axis of rotation; a spin motor operatively connected to, and configured to drive, the powered spin roller to rotate about its axis of rotation, and a shoulder-up system comprising: a pressure sensor configured to sense a fluid pressure of a system driving the spin motor; a memory storage configured to store a pressure threshold indicative of a motor pressure during a shoulder up condition; and a comparator configured to continuously compare output from the pressure sensor to the pressure threshold, the comparator asserting the shoulder-up condition when the pressure sensor output reaches the pressure threshold, wherein the shoulder-up, system is configured to detect a shoulder-up condition of a pair of tubulars being driven to threadedly connect by the powered spin roller and to initiate spin motor shutdown subsequent to the detection of the shoulder-up condition, wherein the detection is monitored by an oilfield tubular spinner control system and based on a plurality of variables.