METHOD FOR CREATING CASED PERFORATION CHANNEL IN PRODUCTIVE FORMATION OF OIL OR GAS CASED WELL Russian patent published in 2021 - IPC E21B23/12 E21B43/10 E21B7/20 

FIELD: cased oil and gas wells.

SUBSTANCE: disclosed is a method of creating a cased perforation channel in a productive formation of a cased oil or gas well. The method consists in lowering the body of the device for forming and casing the perforation channel on a geophysical cable, fixing the body of the device for forming and casing the perforation channel in the well with an anchor device. First of all, one should descend into the body of the device for forming and casing the perforation channel of the flexible shaft with the tool for forming the perforation channel. A perforation channel should be made in a productive formation at an angle ranging from 75 to 105 degrees to the wellbore. The perforation channel is formed along a straight path along the entire length of the perforation channel. The flexible shaft is lifted with a tool for forming a perforation channel on a geophysical cable at the wellhead. One should descend on a geophysical cable into the formed perforation channel of a filter element mounted on the flexible shaft. The filter element is installed in the perforation channel formed along the straight path. After that one should case the perforation channel formed along the straight path with the filter element.

EFFECT: invention constitutes creation of a cased perforation channel formed along a rectilinear trajectory in productive formation of a cased oil or gas well of any capacity.

1 cl, 11 dwg