METHOD FOR WAVE PRODUCTIVE BED TREATMENT Russian patent published in 2007 - IPC E21B43/18 

FIELD: fluid production, particularly enhanced recovery methods for obtaining hydrocarbons.

SUBSTANCE: method involves installing plunger pump in well filled with liquid; creating isolated constant and alternating pressure chambers in well, wherein the chambers are communicated with each other through channels; periodically changing pressure in separate chambers by means of plunger pump plunger reciprocation inside well; establishing periodic communication of separate well chambers with each other. Alternating pressure chamber is created in plunger pump section located under plunger by pressure decrease in the section. The pressure is decreased by plunger movement in upward direction, which provides vacuum generation in the section. Constant pressure chamber is created in plunger pump section located over plunger. Constant elevated pressure chamber is formed in annulus by annulus filling with liquid for design level. Alternating pressure chamber is communicated with constant elevated pressure chamber as plunger pump plunger moves downwards.

EFFECT: increased wave action power due to increased liquid pressure drop and, hence, increased hydrodynamic pulse during communication of well chambers having different liquid pressure.

2 cl, 1 dwg, 1 ex