... mandrel with certification, G,W,WD,WE type. Slip Casing HangerProduct SpecificationCasing hanger is classified into two kinds ... , i.e. the threaded (mandrel) and the slipped; slip casing hanger consists of G, W, WD, WE and ... connection of casing head and surface casing and keeps the slip closing the casing fast in use of outer force, ... the technology,plz feel free to contact us. Slip Casing Hanger