US 12,436,311 B2
Antenna shield for electromagnetic logging tool
Mark Frey, Sugar Land, TX (US); Anatoly Dementyev, Sugar Land, TX (US); and Dean Homan, Damon, TX (US)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Appl. No. 18/557,837
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
PCT Filed May 11, 2022, PCT No. PCT/US2022/072236
§ 371(c)(1), (2) Date Oct. 27, 2023,
PCT Pub. No. WO2022/241421, PCT Pub. Date Nov. 17, 2022.
Claims priority of provisional application 63/201,716, filed on May 11, 2021.
Prior Publication US 2024/0210589 A1, Jun. 27, 2024
Int. Cl. G01V 3/30 (2006.01); E21B 47/017 (2012.01); H01Q 1/52 (2006.01)
CPC G01V 3/30 (2013.01) [E21B 47/017 (2020.05); H01Q 1/52 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A shield configured for deployment about an antenna on an electromagnetic logging tool, the antenna being configured to transmit or receive electromagnetic energy in a subterranean wellbore, the shield comprising:
a hollow body configured for deployment about the antenna, the hollow body including a plurality of slots extending through the hollow body, wherein the hollow body is electrically conductive; and
at least one recess, wherein the at least one recess does not extend through the full thickness of the hollow body, wherein the at least one recess intersects a first slot of the plurality of slots and a second slot of the plurality of slots, and wherein the at least one recess extends substantially orthogonal to the plurality of slots.