METHOD FOR WELL COMPLETION Russian patent published in 2004 - IPC

FIELD: oil and gas extracting industry. SUBSTANCE: method includes well boring from under shoe of previous column up to planned horizon. Casing column is lowered and cemented by means of delivering and driving buffer liquid and backfilling solution. Consolidation of cement is waited for. Casing column is then pressure tested. Well is bored with simultaneous hydroacoustic treatment. During cementation, as buffer liquids ductile-resilient composition is used, as well as cleaning solution. Lowered water loss cement solution having effect of expansion on solidification is used. During process of delivery and driving of cement solution, 2-3 packs of ductile-resilient composition 10-20 m thick are placed in behind-pipe space. Casing column pressure testing is performed immediately after finishing of driving of cement solution. While waiting for cement consolidation, back pressure from the mouth is created in behind-pipe space. EFFECT: removal of inter-column pressures. 1 ex