LG110, LG330, LG550, LG770 are types of wear resisting and antifriction flux cored wires for oil drill pipe, which is designed and manufactured by Tianjin Leigong Welding Alloys CO., LTD.. Hardfaced by LG110, LG330, LG550, LG770 hardbanding will be inforced with high wear resistance, antifriction, welding repeatability and high crack resistance, which can protect the drill string as well as the casing assets. LG110, LG330, LG550, LG770 adapts to hardfacing metal hardbanding of general drill pipe, heavy weight drill pipe, drill collar and other drilling tools used in bore, ultra deep well, highly-deviated well, extended reach drilling and horizontal well.