METHOD AND DEVICE FOR AN INTERVAL STUDY OF A HORIZONTAL WELL BORE Russian patent published in 2018 - IPC E21B33/124 E21B47/10 

FIELD: measurement technology.

SUBSTANCE: invention relates to a method for an interval study of a horizontal wellbore and an apparatus for carrying out this method. Method for studying the horizontal wellbore includes strickling and washing the wellbore, paying out on the string of pipes of the perforated body with two packers in the interval of installation, packers setting, selection of production of a layer from the space between packers through the perforation of the body, determination of water cutting of the production, carrying out water shut-off works with high water cutting of the production, transfer of packers to the transport state, moving the body with packers to the next installation interval and restudy of the formation of the layer production. Perforated holes of the body before the paying out are provided with valves that pass from the outside to the inside. Plugged end of the body is equipped with two anchors, of which the near to the face is mechanical, and the far one is hydraulic. Packers are made in the form of elastic cups placed between the stops. Cups near the packer, located closer to the face, are made of a less elastic material than the cups of another packer. Body on the side of the mouth is supplied with a pulling hydraulic jack. After the device is lowered into the installation interval, a pipe string with the body is rotated to install a mechanical anchor, after which, in the body, an overpressure is created through the pipe string to install the hydraulic packer. Pipe string is unloaded, creating an axial force for moving the packer stops towards each other, compressing the cups and sealing the downhole space. Cups from the less elastic material of the packer, located closer to the face, are set first. After examining the interval between the packers to transfer the device to its initial transport position, the pipe string at the mouth is raised. Axial force on the body and anchors are created, a piston in the cylinder of the hydraulic jack is moved, translating into active status. When there is a lack of axial force in the pipe string, excessive pressure is created, and the hydraulic jack creates an additional tractive force sufficient to transfer the device to the transport position. After moving the device to a new installation interval, the operations are repeated.

EFFECT: technical result is the expansion of technological capabilities.

2 cl, 6 dwg