US 12,460,533 B2
Tool and method to make high resolution and high penetration measurement of corrosion
Reza Khalaj Amineh, Houston, TX (US); Burkay Donderici, Pittsford, NY (US); and Luis Emilio San Martin, Houston, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Jun. 7, 2021, as Appl. No. 17/340,318.
Application 17/340,318 is a continuation of application No. 15/533,961, granted, now 11,174,725, previously published as PCT/US2016/046858, filed on Aug. 12, 2016.
Prior Publication US 2021/0293137 A1, Sep. 23, 2021
Int. Cl. E21B 47/00 (2012.01); E21B 47/092 (2012.01); E21B 47/13 (2012.01); G01V 3/28 (2006.01); G01V 3/34 (2006.01); G01V 3/38 (2006.01); G01V 20/00 (2024.01)
CPC E21B 47/006 (2020.05) [E21B 47/092 (2020.05); E21B 47/13 (2020.05); G01V 3/28 (2013.01); G01V 3/34 (2013.01); G01V 3/38 (2013.01); G01V 20/00 (2024.01)] 18 Claims
OG exemplary drawing
 
1. A multi-string corrosion monitoring method that comprises:
transmitting a primary field of at least one frequency from a transmitter disposed on an electromagnetic (EM) logging tool;
measuring an electromagnetic field generated by at least a first eddy current from the primary field in at least one inner tubing string with the EM logging tool;
measuring an electromagnetic field generated by at least a second eddy current from the primary field in at least one outer tubing string with the EM logging tool; and
characterizing one or more attributes on the at least one inner tubing string or the at least one outer tubing string based at least in part on a cost function, wherein the cost function implements a first weighting coefficient for the first electromagnetic field, wherein the first weighting coefficient is based at least on the inner tubing string and a second weighting coefficient for the second electromagnetic field, wherein the second weighting coefficient is based at least on the outer tubing string.