WELL DEVELOPMENT METHOD Russian patent published in 1999 - IPC

FIELD: recovery of fluids from wells. SUBSTANCE: method can be used in operation of oil wells. According to method, lowered into well is lifting string of pipes with filter and tail-piece of variable cross-section in length. Part of weight of lifting string is relieved by resting tail-piece on well bottom-hole. Rock matter in productive bed is made less dense. Well is provided with immersible pump. Used in function of immersible pump is plunger pump. Pump is arranged so that when its plunger is in extreme upper position, its overplunger part is hydraulically connected with its underplunger part. After putting well in operation, periodically that is 1-2 times per month discharge line at well head is closed. Closed period corresponds to 30-40 thousand strokes of plunger or until well output is increased. In further operation when well output lowers below permissible value discharge line is closed more frequently. Degree of relieving weight of lifting string on well bottom-hole is varied. Application of aforesaid method ensures increase of oil output from productive bed due to more efficient dilation and wavy treatment of oil bed. EFFECT: higher efficiency. 7 cl, 2 dwg