slick/spiral drill collar is produced by aisi 4145h modified quenched and tempered steel as api specification and implementation of sy / t5144 standard, which can be cold thread rolling, copper or phosphate processing, machine special double shoulder thread and other specificatiomore...
The Drill collar slips are fallen into three models, that is, DSC-S, DSC-R, and DSC-L. The models can be used to handle drill collars with outer diameters from 3" OD to 14" OD more...
