Multi-material density well logging subassembly
AssigneeCordax Evaluation Technologies Inc.
InventorCurtis Lentz
Life of this patent
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Abstract
A sub adapted for injection into the wellbore and sensing, the sub comprising: (a) an elongated body; (b) an inner bore having multi-material spacers of different radiation transparencies; and (c) an outer wall having recessed portions along an outside diameter, forming circumferential windows configured to align with a radioactive source and sensors and configured to guide a radioactive energy's path into a formation and back to sensor.
Claims6
A sub adapted for injection into a wellbore as a part of a tubing string into a formation for receiving and aligning with a separate run-in tool with a radioactive source and sensors, the sub comprising:
- (a) an elongated body;
- (b) an inner bore formed of stacked adjacent multi-material cylindrical spacers within an inner conduit in the body of the sub, the spacers having different radiation transparencies;
- and
- (c) an outer wall of the body of the sub having recessed portions along an outside diameter,
- the more transparent spacers combined with the recessed outside diameter forming circumferential windows in the sub wall configured to align with the run-in tool with the radioactive source and sensors when the run-in tool is located inside the sub's inner bore and the source, sensors, shields and windows provided by the cylindrical spacers different transparencies, and windows provided by the recessed portions are thereby spatially configured to guide a radioactive energy's path from the source into the formation and back to one or more of the sensors.
Dependencies are inferred from the claim text.