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 and gas 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, successive formation of process channels over the perimeter of the casing column, by means of the flexible pipe lowered on the additional pipe string with a nozzle, successively, by turning the diverter thus forming a number of process channels over the perimeter. Prior to being dropped into the well the flexible pipe is fitted with filters, the filtering openings of which are plugged with acid-soluble material. After formation of the process channel the flexible pipe is disconnected from the additional pipe string and the pipe remains in the process channel. Then the additional pipe string is withdrawn out of the well and the next flexible pipe with filters is installed and after turning the divertor through a certain angle the next process channel is formed, similar to the first one. Then the procedure is repeated. After formation of the last process channel acid is injected into all process channels for dissolution of acid-soluble material of filters.

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

1 dwg