A control system for a combined power generation and metallurgical plant facility integrates generator-side and load-side control to provide coordinated operation of the two processes. The delta-sigma modulator includes a loop filter having a plurality of serially coupled integrators, and a multi-bit quantizer coupled to the loop filter; the multi-bit quantizer including an ADC operable to produce a multi-bit digital output signal, the ADC coupled to a DAC having dual DAC feedback loops, and a dynamic element matching function. The stripper rubber has a generally cylindrical upper moiety and a dynamic, generally frustoconical, lower moiety that cooperatively define a bore for receiving oilfield equipment.