Conventional oil pumping units from Ukraine. Oil pumping jacks. Heavy duty conventional oil pumping units from Ukrainian factory in production from 1925. The ck 3-1 has a 3 ton pumping capacity, with a 7. 5 KW motor, arm stroke from. 9 to 1. 5 meter, and unit weight is 3. 85 tons. Other units available in capacities of 8, 12, 1nd 15 ton. Other oil field production equipment aavailable: automated oil pipeline heaters, sludge vertical pumps, clay mixers, stream milling cutter, drilling solution degasser, etc.