METHOD OF CONSTRUCTION OF MULTI-SHAFT WELL Russian patent published in 2008 - IPC E21B7/04 E21B43/02 

FIELD: petroleum industry.

SUBSTANCE: invention relates to the oil production industry, particularly to construction of oil and gas well clusters. The method includes cutting the casing column within the interval required, dropping pipes with the diverter into the casing column within the interval required, successive formation of process channels over the perimeter of the casing column in the productive seam by means of the flexible pipe with a nozzle, successive formation of a number of process channels over the perimeter over the perimeter by turning the diverter. After formation of process channels flexible links are inserted successively into the pipe string by means of the divertor. The links are fitted with filters, the openings of which are plugged with acid-soluble material and additionally with a blind nozzle at the end, the diameter of the additional nozzle being smaller than that of the main nozzle. After installation of flexible links with filters in the process channel they are disconnected from the additional pipe string, which is withdrawn successively out of the well for installation of similar flexible links with filters to be inserted into the next process channel. After flexible links with filters are inserted in the last process channel acid is injected into all process channels for dissolution of acid-soluble material of filters. The invention provides increased efficiency of operation of the multi-shaft well.

EFFECT: increased efficiency of operation of the multi-shaft well.

2 dwg