METHOD OF PRODUCT INFLOW STIMULATION FROM WELLS AND DEVICE FOR METHOD EMBODIMENT Russian patent published in 2003 - IPC

FIELD: operation of wells in development of oil and gas fields. SUBSTANCE: method includes measurement of pressure at wellhead and periodic opening and closing of controlled shutoff member at wellhead pressure exceeding the pressure value of upper assigned constant setting or at wellhead pressure dropping to pressure value of lower assigned constant setting, respectively. Controlled shutoff member is closed at moment of secondary drop of pressure in tubing down to value of lower setting. With reaching the value of pressure of lower assigned constant setting, at moment of increase of time of inflow by a factor of 1.5-2, with simultaneous reduction of production rate, well is shut- in, and well zone of formation is drained with help of downhole jet pump. After that, well is again put into service under controlled period conditions until next increase of inflow time. Device for method embodiment has pressure pickup, comparators of upper and lower values of pressure and controlled shutoff member, two delay lines, flip-flop, logic element and adder. Output of one of comparators is connected to inputs of delay line and flip-flop. Outputs of the first delay line and flip-flop are connected to input of logic element. Output of logic element is connected with the first input of adder. The second input of adder is connected to one of inputs of controlled shutoff member. EFFECT: increased well productivity and preserved producing ability. 2 cl, 3 dwg, 2 tbl