US 11,940,591 B2
Gamma ray logging tool with detector window
Sergei Knizhnik, Exton, PA (US); and Marian L. Morys, Downingtown, PA (US)
Assigned to Nabors Drilling Technologies USA, Inc., Houston, TX (US)
Filed by Nabors Drilling Technologies USA, Inc., Houston, TX (US)
Filed on Jul. 14, 2021, as Appl. No. 17/305,741.
Claims priority of provisional application 63/062,904, filed on Aug. 7, 2020.
Prior Publication US 2022/0043178 A1, Feb. 10, 2022
Int. Cl. G01V 5/12 (2006.01); E21B 47/01 (2012.01)
CPC G01V 5/12 (2013.01) [E21B 47/01 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for performing a subterranean operation, the system comprising:
a tool for detecting gamma rays, the tool comprising:
a body;
a gamma ray detector assembly disposed within a bore of the body, such that the body radially surrounds the gamma ray detector assembly, with the gamma ray detector assembly configured to detect the gamma rays, wherein the gamma ray detector assembly comprises one or more scintillation crystals and one or more photomultipliers; and
a window formed in an outer surface of the body, such that the window is axially aligned with the gamma ray detector assembly, wherein the window comprises a recess extending radially inward from an exterior surface of the body, and wherein the exterior surface is in pressure communication with a pressure that is external to the tool.