DEVICE FOR HYDRODYNAMIC STIMULATION OF BOTTOM-HOLE FORMATION ZONE (VERSIONS) Russian patent published in 1997 - IPC

FIELD: equipment for oil-and-gas producing industry designed for stimulation of production rate of oil field wells to increase their throughput capacity. SUBSTANCE: device separates the well by slider moving along the well axis into lower and upper isolated parts and provided with members ensuring slow motion of slider upward and subsequent quick motion downward. To increase the efficiency of action on formation, the device has members for concentration of pulse energy in narrow region. Equipment provided for device operation is located on the day surface. Physically the device does not interfere with mineral mining in its idle position, therefore it is not withdrawn from well after its dynamic treatment. Dynamic stimulation of formation is based on generation of alternating pulses of low and high pressures in volume of fluid of bottom-hole formation zone. Fluctuations of pressure within a wide range assists in removal from formation of capillary water which locks mineral and to increase of rock porosity. EFFECT: higher efficiency. 3 cl, 3 degr