OIL WELL DEVELOPMENT METHOD Russian patent published in 2000 - IPC

FIELD: oil and gas production. SUBSTANCE: when developing recently drilled well, bottom zone of well is simultaneously affected by chemically active fluid and hydraulic pulses. For that, interval of productive formation in well is filled with solution for treatment of bottom zone. Hole clearance of well is cut off and vacuum-pulse action is conducted at reduced intensity, while simultaneously pumping off reaction products. In pauses between vacuum-pulse action series, well bottom is subjected to jet action. The two action are made by means of step piston connected with bar string. Vacuum-pulse action is performed during upward motion of bar string and step piston, and jet action during downward motion. EFFECT: enhanced well development efficiency. 2 dwg