FIELD: soil or rock drilling.
SUBSTANCE: invention relates to a high pressure system for multiple hydraulic fracturing and a pipe hydraulic valve system (PHV) for connection to a production string to enable the isolation of a zone-of-interest formation within a well. In particular, this system provides the possibility of access to a ground formation for hydraulic fracturing of a zone-of-interest formation and extracting raw hydrocarbons. System as a whole comprises cork counting system, cork locking system, and valve system, and dropping a group of corks down the production string allows to lock individual corks sequentially within individual PHVs for successive hydraulic fracturing operations.
EFFECT: technical result is to increase the efficiency of the hydraulic pipe valve.
19 cl, 20 dwg
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