For low pressure and low gas production Wells, the flow rate of gas in tubing is an important factor affecting the drainage of gas Wells because of its small gas production and limited liquid carrying capacity. The higher the gas flow rate through the pipe section at the bottom of the well, the greater the liquid carrying energy is provided. In order to prevent the liquid from falling back and reduce the accumulation of liquid at the bottom of the well, a certain gas flow rate must be ensured. The small diameter of the pipe column can effectively reduce the cross-sectional area, increase the gas flow rate, and achieve the purpose of gas drainage. The coiled tubing velocity string tool is composed of a ring pressure connector, a plug, a perforated tube and a guide shoe.