公开(公告)号：US11940591B2

公开(公告)日：2024-03-26

申请号：US17305741

申请日：2021-07-14

申请人： Nabors Drilling Technologies USA, Inc.

发明人： Sergei Knizhnik ,  Marian L. Morys

IPC分类号： G01V5/12 ,  E21B47/01

CPC分类号： G01V5/12 ,  E21B47/01

摘要： A system including a logging tool that can detect gamma rays in a wellbore, where the logging tool can have a window formed in an outer surface of a drill collar that allows increased sensitivity of a gamma ray detector assembly housed within the drill collar, with a body of the drill collar radially surrounding the gamma ray detector assembly, where the window can be filled with a material, and where the windows provide increased sensitivity to gamma rays in a wellbore in an azimuthal direction allowing azimuthal mapping of the gamma rays in formation surrounding the wellbore.