... SERVA: TPA-400, TPA-600, TPB-600 HALLIBURTON: HT-400 GARDNER DENVER: GD2000T, GD2250T, GD2500Q OPI: 1800AWS Continental Emsco, Bomco, Drillmec, Lewco ... , Eweco, Gardner Denver, Gaso, Hong Hua HHF, Ideco, Ls-now, Massarenti, National, Oilwell ...