US 12,435,620 B1
Dogleg severity estimation via collar magnetic field measurements
Makito Katayama, Clamart (FR)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed on Sep. 26, 2024, as Appl. No. 18/897,057.
Int. Cl. E21B 47/0228 (2012.01); E21B 47/024 (2006.01)
CPC E21B 47/0228 (2020.05) [E21B 47/024 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for estimating dogleg severity comprising:
rotating a downhole tool in a wellbore, the downhole tool including a roll stabilized sensor housing deployed in a rotating collar, the sensor housing including a magnetic field sensor deployed therein, the collar including at least first and second magnets deployed thereon;
using the magnetic field sensor to make cross-axial magnetic field measurements while rotating;
identifying a distortion in the magnetic field measurements; and
estimating the dogleg severity from the distortion in the magnetic field measurements.