Hydraulic bed breading and friction reducing centering short segment

The utility model discloses a hydraulic bed breaking and friction reducing centering short segment, which belongs to the tool of petroleum and geological drilling and consists of a spiral centering reinforcement, a rod body, a spiral channel and a joint. The centering ring, the spiral reinforcement, the rod body and the joint are connected into a whole, and the spiral channel is encircled by the centering ring, the spiral reinforcement and the rod body. By utilizing the centering action of the centering ring and the channeling effect of the spiral centering reinforcement, an annular helical flow is formed, and the annular velocity is accelerated. When the flowing state of drilling liquid can be changed into turbulence from laminar flow, the utility model is beneficial for improving the cutting-carried ability and the bed-breaking ability of drilling liquid in a high-angle borehole and a horizontal borehole, keeping the borehole clean and preventing the forming of a cutting bed; at the same time, the centering ring and the well wall are contacted continuously with large contact area, to reduce the deformation of the well wall without cutting the well wall as well as reduce the friction of a drilling stem. The utility model can be used for the high-angle oriented well, the horizontal well and the extended-reach well.