Hydraulic Casing running tool is a new technology for running casing. We developed the more safe and efficient internal casing running tool to break the limitation of normal running casing operation. This technology could develop all the advantages of top drive drilling, make the casing string rotating, lift and circulating the mud simultaneously, insure the casing could be running to the well bottom normally, improve the success rate, safety and efficiency of casing running observably. It has a wide introduction value to the oil field.