US 12,247,480 B2
Lower-density or collimating well-logging radiation detector windows
Justin Mlcak, Richmond, TX (US); Sicco Beekman, Houston, TX (US); and Avtandil Tkabladze, Sugar Land, TX (US)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Appl. No. 18/006,167
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
PCT Filed Jul. 23, 2021, PCT No. PCT/US2021/042933
§ 371(c)(1), (2) Date Jan. 20, 2023,
PCT Pub. No. WO2022/020699, PCT Pub. Date Jan. 27, 2022.
Claims priority of provisional application 63/055,411, filed on Jul. 23, 2020.
Prior Publication US 2023/0258073 A1, Aug. 17, 2023
Int. Cl. G01V 5/08 (2006.01); E21B 47/11 (2012.01)
CPC E21B 47/111 (2020.05) [G01V 5/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A downhole tool, comprising:
a radiation source configured to emit radiation;
a detector window comprising:
a dome having a first surface and a second surface; and
a support structure configured to provide support for the dome;
a detector configured to detect a first portion of the radiation through the detector window after the radiation has interacted with a geological formation;
a window insert positioned in the detector window; and
a collimator extending at least partially through the window insert, the collimator configured to allow the first portion of the radiation that is travelling in a direction substantially parallel to a central axis of the collimator to pass through the collimator to the detector,
wherein the window insert is configured to shield the detector from a second portion of the radiation that is travelling in a direction that is substantially deviated from parallel to the central axis of the collimator.