... 475m 2.Application: diamond and wire-line coring drilling JRK-5 Hydraulic Core Rig1.Main Application and Performance ... JRK-5 hydraulic core rig applies to diamond drilling and wire-line coring drilling technologies. ... The hydraulic core rig contains hydraulic pump, hydraulic motor, main valve, windlass, transmission, hydraulic oil cooler, liquid pressure gauge, hydraulic hose and ...