WELL CONSTRUCTION METHOD Russian patent published in 2012 - IPC E21B7/00 E21B33/10 

FIELD: oil and gas industry.

SUBSTANCE: well construction method includes borehole sinking, lowering and attachment of casing and production strings. During drilling of the direction, cyclic controlled-angle drilling of the direction and bore hole under grief stem is performed using screw, with periodic lifting of drilling tool and discharge of drilled out slurry. Screw and drilling tool with diameter of 500 mm or 630 mm are used for drilling. Pipes with diameter of 377 mm or 426 mm are used as conductor pipes. In its upper part casing conductor pipe is plugged and provided with connection pipe, in its lower part it is provided with circulating openings for cement solution to pass. Casing pipe is arranged in well shaft so that upper part of the pipe is above ground level.

EFFECT: reducing of construction time and cost during well construction.

1 dwg, 1 ex