Deck wrench disengage with pipe unscrewed interlock

A mobile drill machine, comprising:

• a mobile frame;
• a drill mast mounted on the frame;
• a drill head movably mounted on the mast;
• a drill string coupled to the drill head and aligned with the mast;
• a deck wrench mounted on the frame configured to engage the drill string;
• an interlock system, the interlock system including,
• a sensor assembly configured to determine a drill string status,
• an operator interface configured to receive a deck wrench disengagement input, and
• a control module configured to receive the deck wrench disengagement input from the operator interface, receive the drill string status from the sensor assembly, determine from the drill string status that a drill string component engaged by the deck wrench is connected to a drill string or a drill head, and disengage the deck wrench from the drill string component engaged by the deck wrench.

A method for providing a digital interlock for a mobile drilling machine, comprising:

• receiving a deck wrench disengagement input at an operator interface;
• receiving at a control module the deck wrench disengagement input from the operator interface;
• receiving a drill string status at the control module from a sensor assembly;
• determining from the drill string status that a drill string component engaged by the deck wrench is connected to a drill string or a drill head;
• and
• disengaging the deck wrench from the drill string component.