STEAM-IMPULSE PRESSURE GENERATOR FOR THE TREATMENT OF OIL WELLS

摘要

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.

主权项

1. A steam-impulse pressure generator for the treatment of oil wells of the type containing an hermetic enclosure having a cavity containing a working agent; a depressurization system having a rupturable membrane; an element of initiation of the working agent mounted inside the enclosure, characterized in that:
the working agent consists of compressed high-energy powder mixture in the form of separate blocks with raised thermal emission, about 7.5 MJ/kg of heat; the hermetic enclosure, with the working agent located in it, comprises a single unit with the element of initiation and fusible membrane; the depressurization system of the case by its melting comprises a circular metallic membrane having a calibrated thickness; and wherein the generator further comprises: a protective assembly for guiding melted combustion product into a steam-kinetic chamber, the protective assembly including a burnable membrane; a non-hermetically sealed steam-kinetic chamber, as much as possible open enclosure, with windows (nozzles), evenly distributed over its entire surface; an adapter, compatible with geophysical connectors, integrated with a discharge module and calibrated protection system of well logging cable and geophysical connectors from sharp pressure and temperature jumps; and an electronic switch, node connector, for switching several pressure generators lowered into the well.