11 Ignition systems comprised of a gas supply tube with a nozzle and an electrical igniter to create a flame at the nozzle for oil and gas drilling and production operations, namely, for igniting waste gases being discharged from a well; mud gas separators, namely, separators for the cleaning and purification of drilling mud; gas extraction devices, namely, degasser of gas and extractors of liquid for use in extracting gases from drilling fluids; and pressure control equipment, namely, chokes and degassers for separating gas from fluid during oil production; power operated pressure control equipment for use in drilling oil, namely, chokes, and degassers for extracting gas from fluid during oil production and dual mud gas separators for horizontal drilling