METHOD FOR DETERMINING THE SLUDGING OF THE WELLBORE Russian patent published in 2021 - IPC E21B47/09 

FIELD: oil industry.

SUBSTANCE: invention relates to the field of research of the wellbore in order to determine the sludging. A method for determining sludging of the wellbore includes: the registration data on the change of the weight on the hook when lifting the layout of the bottom of the drill pillar on the uncased section of the wellbore, the zenith angle of which is less than 30° (standard section), or obtaining historical registration data of the change of the weight on the hook on the standard section; the registration data of the change of the weight on the hook when lifting the layout of the bottom of the drill pillar on the section of the wellbore, where the zenith angle is 30° and more (study section); comparison of the hook weight change data obtained at the standard section and the study section, and determination of the sludging at the study section by exceeding the amplitude of the hook weight change at the study section relatively to the hook weight change data at the standard section.

EFFECT: simplified method (system) for determining the sludging of the wellbore and the machine-readable vehicle implementing the method, while increasing the accuracy of the degree of sludging, as well as identifying the sludged areas in the well, i.e. determining their location in the well.

20 cl, 4 dwg