KR78-35 thermal recovery wellhead is mainly used in the wells that adopt steam stimulation or other thermal methods of oil extraction. The equipment consists of tubing head, tubing hanger, the main valve gate BOP (BOP), BOP pipelines and tubing head pipelines valve ( "Y"-type check valve), 2-9/16 "flat gate valve, 3-1/8 "flat gate valve, thermowell, thermometer, pressure switch, clamp, check valves, pressure gauges and other spare parts.