External packer of high temperature pipe

The present invention relates to a high-temperature outer packer, comprising a collar, short sleeve section, the central tube and the joint, one end of said sleeve with one end of the short section of pipe threaded connection or fixed connection, the the other end of the sleeve and the nipple or a threaded collar screwed fixedly connected, a short section of the sleeve, the sleeve and the upper joint connection pipe threaded connection, further comprising a high-temperature plastic barrel assembly and bidirectional locking means a high-temperature plastic cartridge assembly and the sleeve bidirectional locking means on the outer surface of the central tube, one end of the high-temperature plastic cartridge assembly in contact with the upper joint, the other end of the bidirectional locking contact means. The present invention is a long horizontal wells heavy horizontal section can be divided into several small pieces of independent independent operation, the use of the horizontal section to solve the problem of uneven. Meanwhile, the high temperature and the outer packer tube inner diameter same screen, and may be other steam injection tubing string into the well string.