The high-strength toughness oil and gas well borehole operation of 150ksi grade of steel steel pipe and production method thereof

The invention provides the high-strength toughness oil and gas well borehole operation of a kind of 150ksi grade of steel steel pipe and production method thereof, the weight % of its composition is C:0.22%～0.26%, Si:0.15%～0.35%, Mn:0.40%～0.60%, P≤0.010%, S≤0.005%, Cr:0.90%～1.10%, Mo:0.70%～0.80%, V:0.10%～0.15%, surplus are Fe.This kind product processes is to adopt steel scrap and sponge iron or molten iron to do steelmaking feed, after electric arc furnace smelting, external refining and vacuum outgas, continuous casting becomes the circle base, again after high precision is rolled into weldless steel tube, quench and tempering heat treatment, make hollow light end weldless steel tube at last.The beneficial effect that this product reaches is that this steel pipe has good physicochemical performance, can be widely used in having stimulation work such as the oil gas well down-hole formation testing of rock of high compactness or perforation, pressure break, the body intensity of 150ksi grade of steel and guarantee whole borehole operation security of system under this kind environment with the toughness of its coupling.