WELL COMPLETION METHOD AND DEVICE Russian patent published in 2006 - IPC E21B43/117 E21B43/263 

FIELD: oil production, particularly to create spoke-ring crack in oil saturated rock.

SUBSTANCE: method involves boring well; casing the bell with casing pipes and cementing thereof; lowering selective cumulative rock-drilling machine, which comprises n sections with each section provided with separate cumulative charge; creating undercut in rock; performing hydraulic reservoir fracturing; expanding and fixing crack. Well borehole is drilled transversely to rock stratification direction. Telescopic device with central connection pipe and longitudinal stiffening ribs is arranged in casing pipe to be lowered in place of following crack creation. The undercut is performed in plane transversal to well axis and arranged at central pipe by combining cumulative charges with undercut plane in sections; serially throwing the charges and creating channel fan in the reservoir. Device comprises central connection pipe to be installed in casing pipe. The connection pipe is provided with longitudinal stiffening ribs for connection pipe wall reinforcement and telescopic connection units, which are connected to upper and lower casing pipe parts. The device also has cumulative rock-drilling machine comprising n sections, wherein each section provided with separate cumulative charge. Each next rock-drilling machine section is turned through angle divisible by 2π/n value relative to previous one. Method for well completion involves choosing the well having reservoir penetration angle near to 90° to reservoir layer inclination; lowering selective cumulative perforator having n sections, wherein each section is provided with separate cumulative charge; creating undercut in rock to create channel fan in plane transversal to well axis by aligning the cumulative charges with undercut plane in sections and serially throwing the charges; transversally cutting casing pipe below undercut plane; performing hydraulic reservoir fracturing and fixing the obtained crack; closing the undercut area with filtering connection pipe.

EFFECT: increased operational quality and reduced costs.

3 cl, 13 dwg