Heat transfer enhancing device

The utility model provides a heat transfer enhancing device. The heat transfer enhancing device is of a spring-shaped helical structure and comprises a winding segment and two contact segments, the two contact segments are connected with the two ends of the winding segment respectively, the two contact segments and the winding segment constitute the helical structure which is wound onto a conveying pipeline, and each contact segment is composed of heat transfer memory materials; when the temperature of the contact segments is lower than a first preset temperature, the contact segments are attached to the outer wall of the conveying pipeline, and the whole heat transfer enhancing device is wound onto the conveying pipeline; when the temperature of the contact segments is higher than or equal to a second preset temperature, the contact segments are propped up and make contact with a pipeline outside the conveying pipeline. By means of the heat transfer enhancing device, the multiple oil layer fireflooding ignition effect can be improved, and developed heavy oil reservoirs can be ignited rapidly and successfully.