WIPER PLUG FOR DETERMINING ORIENTATION OF CASING STRING IN WELL BORES Russian patent published in 2017 - IPC E21B47/24 

FIELD: mining engineering.

SUBSTANCE: system is proposed for determining the circumferential orientation of a casing string relative to a well bore in which the casing string of the well passes, comprising of: a snap joint connected in a casing string and having a fixed circumferential orientation relative to it; a wiper plug located and retained within the snap joint in a known circumferential orientation relative to the casing string; a sensor module operatively connected to the wiper plug and configured to obtain data relating to the circumferential orientation of the wiper plug and thus the circumferential orientation of the snap joint along with the casing string relative to the well bore; and a data transmission module operatively connected to the sensor module and configured to transmit data to the area on the surface. Moreover, these data correspond to the data obtained by the sensor module with respect to the circumferential orientation of the wiper plug, the snap joint and the casing string relative to the well bore.

EFFECT: improved accuracy and reduced orienting time consumption.

17 cl, 19 dwg