Abstract: A steam-impulse pressure generator includes a burnable membrane separating (1) a heat-generating device, which is an hermetic enclosure, the cavity of which is filled with heat-generating blocks, from (2) a steam-kinetic chamber, which is a non-hermetic, open enclosure, with windows (nozzles), evenly distributed over the entire surface, with the minimum dynamic resistance for an exit of the steam-water mixture, while offering as much interference as possible against the melted material exiting into the well. High temperature melt coming from the main body makes direct contact with the borehole fluid causing a hydrodynamic disturbance of high-intensity in the form of series of steam-pressure pulses, which penetrates into the bottom-hole formation zone (“BFZ”) and improves the filtration properties of the rock formation not only and not so much by the removal of the wax, paraffin and resin depositions, but rather because of layer microruptures in the BFZ.

Abstract: A thermos is disclosed which has been modified so, that its content can be heated while inside the thermos and stays hot for a long time after the external heat source has been removed. The thermos combines properties of a Dewar's vacuum bottle and properties of a heat pipe. It comprises an outer vessel, an inner vessel and a vacuumized space between the vessels. A working substance having a liquid phase and a vapor phase is disposed within the vacuumized space, on the bottom wall of the outer vessel. The amount of the working substance is less than would be necessary to fill the interval between the bottom walls of the vessels. The saturated vapor pressure of the working substance is less then 10 Pa when the outside heat source is removed or turned off. When the thermos is heated, the working substance absorbs heat from the bottom wall of the outer vessel, vaporizes, and delivers the latent heat of vaporization to other parts of the thermos.