Casing-running device and casing-running operation process

The invention discloses a casing-running device and a casing-running operation process, which belong to the field of petroleum and natural gas drilling. The casing-running device comprises a top connecting sub, a connecting plate and an elevator assembly which are sequentially connected, and also comprises a main connecting pin and auxiliary connecting pins, wherein the top connecting sub is connected with the connecting plate through the main connecting pin, and is used for connection with the central pipe of a power swivel, the connecting plate is connected with the elevator assembly through the auxiliary connecting pins, and the elevator assembly is utilized to hold or release a casing to carry out casing-running operation. The process includes the casing-running device, and the detail of the steps of the process can be seen in the description. Because the embodiment of the invention does not require the arrangement of a hydraulic power tong or a cathead on a wellhead, wellhead tools are simplified, moreover, the wellhead space is effectively reduced, and thereby the problem that large wellhead space is occupied in the prior art is solved; and the usage of the embodiment of the invention can effectively decrease the labor intensity of workers, and solves the problems of high worker labor intensity and low casing-running efficiency existing in the prior art.