Novel drainage throttler

The invention provides a novel drainage throttler which comprises a central pipe, a fishing mechanism, a slip anchoring mechanism, a rubber barrel sealing mechanism, a ratchet locking mechanism and an air tap sand prevention throttling mechanism, and the fishing mechanism, the slip anchoring mechanism, the rubber barrel sealing mechanism, the ratchet locking mechanism and the air tap sand prevention throttling mechanism are arranged outside the central pipe in a sleeving mode and connected in sequence. An upper joint is sleeved outside the gas-liquid mixing chamber, the upper end of the central pipe is connected with a flow guide pipe, and the upper end of the flow guide pipe is connected with a rectification nozzle; the gas-liquid mixing chamber is additionally arranged at the upper end of the central pipe, the purpose of water drainage is achieved through self-spraying of underground natural gas in the throttler and mixing of the natural gas and accumulated liquid in an oil pipe, the water drainage effect i