METHOD OF DRILLING OF BRANCHED WELLS FROM PARENT WELL (VERSIONS), BRANCHING BUSHING (VERSIONS), AND METHOD OF ITS INSTALLATION INTO WELLBORE, METHOD AND DEVICE FOR REAMING AND FORMATION OF MEMBERS OF OUTLET HOLES OF BRANCHING BUSHING, METHOD OF WELL CASING AND DEVICE FOR ITS EMBODIMENT Russian patent published in 2002 - IPC

Abstract RU 2189429 C2

FIELD: mining industry, particularly, developments designed for creation of system of branched cluster wells from parent well in recovery of hydrocarbon materials. SUBSTANCE: invention includes description of several versions of method of drilling branched wells from parent well, description of several versions of branching bushing for drilling of branched wells system. Invention discloses method of installation of branching bushing into wellbore parent well, device for installation of branching bushing by expansion and formation of members of outlet holes of branching bushing, and method of well casing with use of branching bushing in set of casing string, and device of said method realization. EFFECT: higher efficiency of drilling branched wells system with reduced expenditures in completion of hydrocarbon material deposits. 59 cl, 17 dwg

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RU 2 189 429 C2

Authors

Omer Ehrve

Dates

2002-09-20—Published

1997-03-07—Filed