METHOD OF THE CASED WELL PROBE PERFORATION Russian patent published in 2018 - IPC E21B43/114 E21B7/06 E21B7/10 

FIELD: construction.

SUBSTANCE: invention relates to the field of oil and gas wells multi-shaft construction and repair and, in particular, to the cased well probe perforation and can be used for the drainage shafts mass radial drilling. According to the method, a casing on the tubular suspension comprising deflector, sealing shoe and separating container with abrasive, for example, corundum, is lowered into the casing string. Probe with the water jet unit is lowered on the cable suspension. Rotating from the wellhead orienting the deflector and stopping it in the well. Activating the well flushing and injecting liquid under pressure into the probe cavity. At that, the hole in the casing creation, the tubular probe introduction into the resulting opening, cement and formation rock destruction is carried out by one process operation due to the abrasive introduction into the device main nozzle. For this, supplying control signal, opening the casing separator first outlet using the dispenser and forced or naturally injecting the abrasive into the annular space between the probe and the deflector. Using the jet of liquid with an abrasive exiting at high speed from the main nozzle cutting the casing string, cement and the formation rock during the probe feeding into the formation. Stopping the abrasive from the separator input for its accumulation. Circulating the accumulated abrasive together with the separable coarse slurry of the destroyed rock through the separator to destroy the rock throughout the entire drainage shaft. Fine sludge is not used in the rock formation destruction. It is taken to the wellhead. Probe through the formation movement is monitored using the permanent and temporary wire communication line and seismoacoustic receivers. Characterizing the rocks being opened electrical resistance and the nature of saturation by the measuring signals. These data are used for the probe navigation, for example, in the formation aquifer part opening, when the advanced probe path correction is necessary. Ensuring the elastic waves reception from the operating water jet unit and ensuring the probe location in passive mode by depth and azimuth. Probe location is provided by measuring the difference in the elastic waves amplitude and arrival time from the water jet unit to the located on the body receivers. Change in the advanced probe direction is carried out by a thermomechanical regulator made in the form of rods made from the titanium-base alloy with shape memory effect. To correct the probe movement path, applying the supply voltage to one of the regulator rods and deforming it to the desired side by heating with electric current.

EFFECT: this enables the water jet unit with the nozzle rotation and returning the advanced probe to the planned path.

1 cl, 5 dwg