... products customizable API 11B hollow sucker rodStandardThe mechanical performance of hollow sucker rod from our company reaches the SY/T5550-2006 “ ... , high wax" crude oil, and it is a rod, of which the rod head and couplings, through friction welding, are welded to ... , all functions are realized through the inner channel of the hollow sucker rod which is formed within the tubular column. Hollow ...