The drilling rig drive the compound box by 3 sets of diesel engines and coupling mechanisms. It passes API certificate and ISO ZJ70/4500LDB rig drive the compound box by 3 sets of diesel engines and coupling mechanisms. Chain box is sealing structure which includes 3 engines and 2 pumps 6 axle. 1,2,3 shaft is input shaft, 2,4shaft is pump shaft, 5 shaft is driven shaft to generator sets, and the ...