METHOD FOR INSPECTING LOWER BED OF WELL DURING SIMULTANEOUSLY-SEPARATE OPERATION OF TWO BEDS DIVIDED BY PACKER USING SUCKER-ROD PUMP (VARIANTS) Russian patent published in 2006 - IPC E21B49/00 E21B43/14 

FIELD: oil extractive industry, possible use during operation of well using sucker-rod pump plant when well shaft is divided above productive bed by packer, in particular for case of simultaneous separate operation of two productive beds in same well.

SUBSTANCE: method includes periodically stopping extraction of fluid from productive bed from below the packer, decreasing counter-pressure on productive bed and tracking pressure restoration speed below the packer. During operation of well extraction of product from lower bed is performed via column of hollow rods without mixing with product of upper bed, and decrease of counter-pressure in productive bed is realized by lifting liquid in hollow rods by piston with check valve, driven from surface by flexible drag-out tool. Then pressure restoration is tracked on basis of liquid level restoration speed in hollow rods. Piston in hollow rods is lifted with speed, exceeding fluid influx speed from bed being inspected. During inspection of lower bed using method for inspecting pressure restoration speed, piston is additionally equipped with manometer from below. Lifting of piston in hollow rods is performed at speed, exceeding speed of fluid influx from lower bed, below level of which manometer is located.

EFFECT: substantially lower laboriousness and time needed for productive bed inspections, simplified operation of wells, wherein productive beds are divided by packer and are operated separately at the same time, increased quality of inspection due to quick receipt of information and possible quick repeat of measurements if necessary.

2 cl, 2 dwg