SECONDARY BED DRILLING-IN AT DEPRESSION WITH LOWERING OF PERFORATOR FOR SUBSURFACE PUMP AND DEVICE TO THIS END (VERSIONS) Russian patent published in 2015 - IPC E21B43/11 

FIELD: mining.

SUBSTANCE: in compliance with claimed process, cumulative perforator is lowered to the productive stratum interval. Electrically-driven rotary pump is lowered into the well on oil-well tubing. Depression of the stratum and perforator injection are performed. Note here that said cumulative perforator provided with geophysical instrument with the transducers of pressure, temperature and fluid properties, gamma-ray logging unit and couplings locator are lowered on geophysical cable to the secondary exposure interval. Said electrically-driven rotary pump unit fitted at oil-well tubing is provided with protective centralizer, current conducting cable and geophysical cable to be displaced there over for referencing to cumulative perforator geological section by displacement of the perforator and instrument over the borehole. The latter allow the measurement of depression developed by the pump and remote measurement of the face pressure and fluid composition. At intermittent registration of said parameters as the depth function, casing section is subjected to diagnostics during the entire MTBR. MTBR period expired, the equipment suspended from the oil-well tubing and cable are withdrawn from the borehole.

EFFECT: simplified secondary exposure, higher quality of productive strata.

3 cl, 2 dwg