METHOD FOR DETERMINING LEAKAGE INTERVAL OF PIPE STRING AND WELL PLUG FOR ITS IMPLEMENTATION Russian patent published in 2024 - IPC E21B33/12 G01M3/00 

FIELD: measuring; mining.

SUBSTANCE: group of inventions relates to a method for determining the leakage interval of a pipe string and a well plug for determining the leakage interval of a pipe string. Method involves filling the pipe string with liquid and controlling the level. Well plug is preliminarily installed in the launching device – lubricator of the wellhead equipment. Plug consists of a hollow shaft closed from below with a pressure-destructible membrane, upper and lower self-sealing collars passing from below. Between the collars there is a centraliser spring-loaded outward. After filling the pipe string above the well plug, pressing-through pressure is created to push it along the pipe string until it is stopped and the corresponding collars are installed above and below the fault with fixation of the pressure jump at the wellhead, providing accurate determination of the leakage interval of the pipe string.

EFFECT: determination of leakage interval of pipe string and simplification of design, reduction of dimensions and material consumption and expansion of functional capabilities due to use in inclined and horizontal wells.

3 cl, 2 dwg