State self-adaptive turbine type pulse generator and downhole drilling tool

A turbine type pulse generator for downhole drilling tool, comprising:

• a pulse generating device that comprises a turbine housing, a turbine shaft concentrically arranged inside the turbine housing, a turbine mechanism arranged around the turbine shaft, and a valve disc mechanism provided at a lower end of the turbine shaft, the turbine mechanism being configured to drive the turbine shaft to rotate relative to the turbine housing under an impact of drilling fluid so that a flow area of the valve disc mechanism is changed periodically to generate pressure pulses;
• and
• an automatic control mechanism configured to control a state of the pulse generating device,
• wherein the automatic control mechanism is configured to keep the turbine shaft static relative to the turbine housing in a circumferential direction during composite drilling so that the pulse generating device is in a non-working state, and to drive the turbine shaft to rotate relative to the turbine housing under an impact of the turbine mechanism during sliding drilling so that the pulse generating device is in a working state.