US 12,221,877 B2
Position measurement system for correlation array
Donald G. Kyle, Plano, TX (US); Nicholas Cole Ashford, Frisco, TX (US); Adam Harold Martin, Addison, TX (US); and Michael Linley Fripp, Carrollton, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Appl. No. 17/161,329
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
PCT Filed Oct. 23, 2018, PCT No. PCT/US2018/057129
§ 371(c)(1), (2) Date Jan. 28, 2021,
PCT Pub. No. WO2020/086065, PCT Pub. Date Apr. 30, 2020.
Prior Publication US 2021/0324732 A1, Oct. 21, 2021
Int. Cl. E21B 47/092 (2012.01); E21B 47/053 (2012.01)
CPC E21B 47/092 (2020.05) [E21B 47/053 (2020.05)] 18 Claims
OG exemplary drawing
 
1. A method for identifying a location of an internal movable structure with respect to a position measurement tool, comprising:
lowering a tubular string into a casing within a wellbore, wherein the tubular string comprises:
the internal movable structure; and
the position measurement tool,
wherein after lowering the tubular string into the casing, the method further comprises:
performing an operation which causes the internal movable structure to move with respect to the position measurement tool;
receiving by a first sensor module, disposed on the position measurement tool, a first signal from a marker disposed on the internal movable structure;
receiving by a second sensor module, disposed on the position measurement tool, a second signal from the marker; and
calculating the location of the internal movable structure with respect to the position measurement tool using the first signal and the second signal.