METHOD FOR SYNCHRONOUS HYDROMONITOR CONSTRUCTION OF SETS OF DRAINING TRUNKS OF SMALL DIAMETER AND THE DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2022 - IPC E21B7/08 E21B7/18 E21B17/20 E21B29/06 E21B43/114 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to the oil and gas industry and can be used for the secondary opening of productive formations by forming several small-diameter lateral drainage trunks simultaneously. The method for synchronous hydromonitor construction of sets of draining trunks of small diameter includes descent to a given section of the borehole on a flow strings of a perforating device, axial feeding from the daylight surface of the flow string with a divider of the working fluid flow attached to its lower end, separation of the working fluid flow through channels of flexible tubes in the divider, moving along the deflecting channel into the casing window of a flexible tube with a hydromonitor rock-destroying tool attached at its end with further formation of small-diameter lateral draining trunks diverging in different directions relative to the axis of the borehole, upon completion of the formation of a small-diameter lateral draining trunk, the flexible tube returns to its original position. The formation of lateral draining trunks of small diameter in several directions is carried out using the window formation module by rotating the rotation mechanism located in the perforating device. The casing string windows are cut through with hydraulic milling tools with a diameter larger than the diameter of the rock-breaking tool installed in the cavity of the window formation module. Flexible transport and casing tubes are placed in the device and connected into a single hydrodynamic system by means of connectors soluble in solvent working fluid. They are cased with flexible casing tubes at the time they are located in the side draining trunks of small diameter by replacing the working fluid with a dissolving working fluid. A hydrodynamic connection of the formation with the main and additional trunks is provided by supplying flexible casing pipes with filter holes hermetically sealed with soluble plugs. The sealing plugs and connectors are dissolved, followed by disconnecting the transport flexible tubes from the casing and removing them to the daylight surface. After that, the process is repeated.

EFFECT: formation and casing of several side draining trunks of small diameter with casing flexible tubes is provided, which guarantee that the resulting trunks do not collapse.

4 cl, 4 dwg