AUTOMATED CONTROL SYSTEM FOR BACK-REAMING

摘要

A system that controls a back reaming operation of a drilling rig is provide d that includes a hoisting system that moves a drill pipe during a back reamin g operation at a hoisting speed and a hoisting torque. The hoisting system comprises at least one back reaming parameter sensor for measuring a corresponding at least one back reaming parameter. An operator control unit allows an operator to input a predetermined value of the at least one back reaming parameter therein. A back reaming parameter sensor obtains the measured value of the at least one back reaming parameter. A control system monitors the at least one back reaming parameter. A braking assembly resists the hoisting torque of the drawworks system when the measured value of the a t least one back reaming parameter equals the predetermined value of the at least one back reaming parameter.