Patent ID: 11905823
Assignee: DYNAENERGETICS EUROPE GMBH
Field: Civil engineering (Other fields)
Classification: CPC E  H | IPC E  H

Claim 12:
13. A method for determining a location of an untethered drone in a wellbore, the method comprising:
receiving, at a sensor connected to an untethered drone, a first indication of the untethered drone at a first receiving zone within a wellbore casing, wherein the first receiving zone is defined by a plurality of first markers of a first circlet that is positioned within the wellbore casing, the plurality of first markers including a first marker configured to transmit a first periodic signal during a first time period, and a second marker configured to transmit a second periodic signal during a second time period, the first time period and the second time period being different time periods, wherein the first indication is the first periodic signal or the second periodic signal;
receiving, at the sensor, a second indication of the untethered drone at a second receiving zone within the wellbore casing, wherein the second receiving zone is defined by a plurality of second markers of a second circlet that is positioned within the wellbore casing; and
determining, via a processor, a relative location or distance of the untethered drone within the wellbore casing based on the first indication and the second indication.