WELL COMPLETION METHOD Russian patent published in 2005 - IPC

FIELD: oil and building industries, particularly for well completion.

SUBSTANCE: method involves high-pressure cementing previously perforated intervals and installing cement bridge inside well so that new false bottom is created above perforation intervals; drilling inclined borehole from level located above upper perforation interval; driving casing pipe into the borehole; separating inner space of casing pipe into upper and lower volumes in zone above producing formation top; communicating upper volume with annular space above producing formation top; communicating lower volume with annular space within the boundaries of producing formation; eliminating liquid flow from annular space into upper volume; pumping cement mortar through upper volume into casing string-borehole annuity above producing formation top; curing cement for setting and hardening thereof; communicating upper and lower volumes and providing liquid flow through casing string interior.

EFFECT: increased well output due to prevention of mudding influence from cement on bottom hole formation zone, maintaining of necessary well diameter within the boundaries of producing formation.

1 ex, 1 dwg