Mud pulse decoding device for directional drilling

The invention provides a mud pulse decoding device for directional drilling, which comprises a column body and a shell, the shell is arranged on the outer side of the column body, a cavity with two communicated ends is arranged in the middle of the column body, the column body comprises an upper end cover, a lower end cover and a shell ring, and the upper end cover and the lower end cover are fixedly connected to the two ends of the shell ring. A detection device is arranged on the side wall of the middle of the shell ring. The mud pulse decoding device is installed below a power drill rod and located on the ground. The column body is a main body part of the mud pulse decoding device, and the middle of the column body is a cylindrical cavity body which is a mud channel. The detection device is installed on the shell ring and used for detecting pulse signals of mud. And the mud pressure pulse can be restored to a corresponding high-low level combination, so that data decoding is realized. 本发明提供一种用于定向钻探的泥浆脉冲解码装