Steam injecting packer

The utility model relates to a steam injection packer, which comprises a body 1, a gland bush 2, a sealed chamber 3, a press piece 4, a force sheet 5, a plug 6, a spare birth 7 and a central tube 8; on the job, when steam injection temperature reaches 200 DEG C, the sealed chamber begins to go soft, temporality the force sheet begins to spread out, and that a fast seal is carried out after the steam injection, and the vapor tension remains stable at a credible data, the up and down fluctuation is less than 1 MPa. Because the structure is reasonable, no components fall into the well at the time of raise and descent, an accident that the well is stuck is avoided. Because the utility model has the structure that the body is directly connected with an upper insulated tubular 4 / 2, the under-part of the central tube is connected with an oil pipe 2 / 2, and the central tube supports packer components, the seal success rate is high and the seal is fast; the seal pressure is greater than the injection pressure, no components fall into the well, and the effect of going gauge is achieved. The utility model has the advantages of reasonable design, simple structure, convenient operation, and being suitable for on-site popularization and application.