초록 ▼

A method for fracturing an underground formation surrounding an oil and/or gas well comprises positioning a fracturing tool in a selected orientation in the borehole and expanding the tool such that it exerts a circumferentially varying pressure against the borehole wall over a selected period of ti

A method for fracturing an underground formation surrounding an oil and/or gas well comprises positioning a fracturing tool in a selected orientation in the borehole and expanding the tool such that it exerts a circumferentially varying pressure against the borehole wall over a selected period of time thereby initiating in the surrounding formation one or more fractures which each intersect the borehole wall in a selected orientation and simultaneously injecting a proppant into the fracture(s).

대표청구항 ▼

[ We claim:] [1.] A method for fracturing an underground formation surrounding a borehole for the production of hydrocarbon fluids, the method comprising:moving into the borehole a fracturing tool which is adapted to exert a pressure which varies in a circumferential direction against the borehole w

[ We claim:] [1.] A method for fracturing an underground formation surrounding a borehole for the production of hydrocarbon fluids, the method comprising:moving into the borehole a fracturing tool which is adapted to exert a pressure which varies in a circumferential direction against the borehole wall;positioning the fracturing tool at a selected downhole location and circumferential orientation in the borehole;expanding the fracturing tool such that the tool exerts a circumferentially varying pressure against the borehole wall during a selected period of time, thereby initiating in the surrounding formation at least one fracture which intersects the borehole wall at a selected orientation; andinserting a proppant into at least one fracture during at least part of said period of time.