| The formation of cuttings bed has a great hindrance to the smooth progress of drilling work, and the cuttings removal tools are mainly used to crush the bottom hole cuttings bed and clean up the suspended cuttings, which can effectively solve the hole cleaning problem. However, most of the cuttings removal tools proposed at home and abroad are external chamfered blades, which need drill pipe rotation to carry out cleaning operation Parts have restrictions on the use of tools. In order to solve the above problems, this paper puts forward a hydraulic flow aid tool with inner and outer spiral channels. By means of CFD numerical simulation, the volume fraction distribution nephogram of cuttings in the wellbore annulus and the cuttings mass flow value on the exit annulus surface are used as the evaluation indexes of the flow assistance effect. Firstly, it is verified that the effect of the internal and external spiral combination flow aid mode is the best. Secondly, when the number of spiral grooves is 3, the cuttings mass flow value on the outlet annulus surface reaches 0.126kg/s; the spiral groove axis When the length is 500mm, the cuttings mass flow on the outlet annulus surface is 0.225kg/s, and the rock carrying capacity is doubled; when the spiral groove lead is 600mm, the cuttings mass flow value on the outlet annulus surface is 0.328kg/s, and the rock carrying capacity is increased by 45.7%. After swirling, the cuttings in the wellbore show the phenomenon of segmented accumulation. A large number of cuttings are suspended under the disturbance of spiral flow, which makes the cuttings migration easier. The accumulation of cuttings has been alleviated.