Wellhead suspension device suitable for small-diameter coiled tubing operation

The invention discloses a wellhead suspension device suitable for small-diameter coiled tubing operation. The wellhead suspension device comprises a hanger, a conversion device and a guide device, wherein the hanger is used for hanging a small-diameter coiled tubing at a wellhead and plays a role in sealing an annular space between the small-diameter coiled tubing and a gas well tubing, and the passing and hanging requirements of a small-end-up inverted-T-shaped structure of a small-diameter coiled tubing downhole tool string are met by changing the internal structure of the hanger, the conversion device is used for being connected with a blowout prevention system during daily agent injection operation, provides a daily blowout prevention effect, is also used for being connected with a guide device during operation of hanging the small-diameter coiled tubing at a wellhead, and can prevent the small-diameter coiled tubing from being deformed and broken due to excessive bending. 本发明公开了一种适用于小直径连续油管作业的井口悬挂装置，包括悬挂