There are a lot of drilling technologies and methods in the world，among them coiled tubing drilling is an important oil and gas drilling technique, particularly for gas drilling. It has been used widely in USA, Canada, and also in Russia, leading to good technical and economical results. There are such coiled tubing units in China, and they are used. In Russia steel wire armored polymer coiled tubing has been developed and its technical characteristics are as good as those of carbon-steel coiled tubing. The designed hydraulic feed device has eliminated the problems such as high drag force, low penetration rate while drilling long horizontal wells. Combining of the armored polymer coiled tubing with the feed device creates favorable conditions for promoting the application of the technology. It can be expected that this technology may make contributions to development of coal gas and shale gas drilling in China, and has definite practical significance. It is worthy for us to pay attention to.