TOOL AND METHOD FOR INJECTION OF IMPREGNATING FLUIDS INTO UNDERGROUND GEOLOGICAL FORMATION Russian patent published in 2003 - IPC

FIELD: tools and methods for injection of impregnating fluids into underground geological formation surrounding of borehole. SUBSTANCE: tool has body carrying separately spaced in axial directions swabs in assemblies. There are, at least, two pipelines for supplying of impregnating fluid and means for moving the tool body in longitudinal direction at regulated speed over borehole with simultaneous injection of various impregnating fluids through supplying pipelines and annular spaces inside geological formation surrounding the borehole. Tool body governs longitudinal axis which in operation assumes position corresponding to longitudinal direction inside borehole. Swabs form, at least, two annular spaces with interval between them in axial direction. Annular spaces are located between tool body and borehole wall. Two supplying pipelines are made for connection to form hydraulic communication with one of annular spaces for supply of impregnating fluid. Tool provides for continuous injection of various impregnating fluids within intervals aver borehole of large lengths with penetration of said fluids inside geological formation. For realization of this process there is no need to perform cyclic transition for injection of some new fluids. EFFECT: higher efficiency of tool and method. 10 cl, 1 dwg