Used for separating long horizontal sections in thermal recovery wells, effectively preventing mutual communication between oil, gas, and water layers

Working principle:

When the tool is lowered into the well along with the completion string and the thermal recovery steam injection process is implemented, as the temperature in the well increases, the thermal sensitive material begins to vaporize when the temperature reaches 170 ° C. When the pressure in the expansion chamber reaches a certain level, the pin is cut off, pushing the hydraulic cylinder to squeeze the rubber cylinder to expand it and achieve sealing of the wellbore annulus.