Pressurization speeding-up system in pit

The utility model relates to a supporting device in oil or natural gas drilling operation, in particular to a pressurization speeding-up system in a pit. The pressurization speeding-up system mainly comprises a drill column stress transmission assembly, a torque transmission pressure bearing assembly, an elasticity reset element assembly, a pressurization cylinder block, an ultrahigh pressure drilling fluid transmission assembly and a drill assembly. The pressurization cylinder block is installed in the torque transmission pressure bearing assembly, and the pressurization cylinder block and the torque transmission pressure bearing assembly are relatively static. Splines on a spline mandrel of the drill column stress transmission assembly are matched with a spline outer cylinder of the torque transmission pressure bearing assembly to transmit torque to the torque transmission pressure bearing assembly so as to drive a drill to rotate and break stones. The pressurization speeding-up system has the advantages that the splines are arranged on the top of the spline mandrel so that the torque is transmitted to the outer cylinder at the top of the system, load on the lower portion of the spline mandrel is reduced, and the total service life of the spline mandrel is prolonged. In addition, the pressurization speeding-up system is simple in structure and stable in performance, and can not bring other risks to the drilling operation in the using process.