FIELD: oil and gas.
SUBSTANCE: invention is referred to processes and devices for extraction of liquid and gaseous minerals including oil and gas, and can be used at a construction of gas, gas-condensate, oil and other holes, including in slightly cemented and friable headers. According to the method a production string before formation-collector opening is blew off and cemented, a production string shoe is installed in a base surface of the tyre cover bridging a formation-collector, the tightness of a production string is validated, a cement sleeve is drilled over, and before descent of oilwell tubings a cavern is constructed on boundary of a formation-collector and a tyre cover which is reamed in a horizontal direction to achievement of the size which magnitude is defined on analytical form.
EFFECT: increase of well efficiency.
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