Pulse-type drilling hydraulic hammer

The invention relates to a pulse-type drilling hydraulic hammer for drilling speed increasing of the petroleum and nature gas industry. The problems of difficult drilling and low mechanical drilling speed of deep well and super-deep hard formations are solved. According to the technical scheme of the pulse-type drilling hydraulic hammer, the upper end of an upper connector is in screw thread connection with a drilling column on the upper portion; the lower end of a hammer seat is in screw thread connection with a drill; a screw rubber stator is fixed in an inner cavity of a stator shell body; a screw rotor is placed in an inner cavity of the screw rubber stator; a thrust bearing is mounted on a step of the middle of an inner cavity of a flow distribution cylinder; the outer circle of the lower portion of a rotating water cap is in clearance fit with the inner cavity of the upper portion of the flow distribution cylinder; a hammer head is mounted on the lower portion of the inner cavity of the flow distribution cylinder; the lower end of the flow distribution cylinder is in screw thread connection with the upper end of the hammer seat; and the upper end of a shell body is in screw thread connection with the lower end of a universal shaft shell body, and the lower end of the shell body is in screw thread connection with the middle of the hammer seat. The pulse-type drilling hydraulic hammer is driven through drilling liquid, high-frequency axial impact is provided while torque is transmitted, the mechanical drilling speed can be effectively increased, and the good effect on development of deep wells and super-deep wells is achieved.