| CPC E21B 19/10 (2013.01) [E21B 19/165 (2013.01); E21B 41/0021 (2013.01); E21B 19/06 (2013.01)] | 17 Claims |
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1. A computer-implemented method, comprising:
monitoring, using an interface between a powerlock and a powerslip of a well, measurements from sensors comprising weight sensors measuring weights, pressure sensors measuring pressures, and temperature sensors measuring temperatures corresponding to use of the powerslip and a grappling device during operation of the well, the measurements indicating a weight of a tubular being transferred between the grappling device and the, the weight sensors being included in the powerslip and communicating with a wireless weight sensor included in the grappling device comprising a case running tool or a casing drive system the powerslip comprising slips that are retractable between positions;
comparing the measurements from the sensors to pre-determined tolerances;
preventing, while the grappling device is gripping a string and supporting a string weight of the string, a release of the grappling device in response to determining that the string weight of the string has not been fully transferred to the powerslip;
verifying, based on the monitoring and the comparing, an appropriate engagement exists between the powerlock and the powerslip, comprising verifying that the powerslip is well seated comprising that the powerslip is gripping the tubular of the string;
in response to verifying the appropriate engagement, releasing one of the grappling device and the powerslip;
providing, by an input/output device controlled by a programmable logic controller (PLC), feedback to a graphical user interface of an operator device regarding an alarm identifying changes in a state of the powerslip and the powerlock, the changes comprising:
a first change in the state of the powerslip, detected by location indicator sensors, and indicating that each of the slips of the powerslip has been fully retracted to an initial position,
a second change in the state of the powerslip indicating that weight has been transferred to the powerslip, and
a third change in the state of the powerslip indicating that no weight is supported by the powerslip;
determining that an input signal to the PLC is lost, the input signal comprising data indicative of positions of the slips of the powerslip; and
in response to determining that the input signal to the PLC is lost, activating an override status to deactivate the grappling device and to maintain a status of the powerslip to engage the string for securing the string.
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