scholarly journals Development of improved gaskets, sealants and cables for use in geothermal well logging equipment. Interim summary report, January 1--December 31, 1977

1978 ◽  
Author(s):  
S. Schwartz ◽  
D. Basiulis
Keyword(s):  
Well Logging ◽  
Summary Report ◽  
Geothermal Well

A 225C Geothermal Logging Tool

2016 ◽  
Vol 2016 (HiTEC) ◽  
pp. 000028-000034
Author(s):  
Marshall Soares ◽  
Randy Normann ◽  
Bruce Ohme
Keyword(s):  
Fluid Flow ◽  
High Temperature ◽  
Data Transmission ◽  
Flow Measurement ◽  
High Speed ◽  
Well Logging ◽  
Geothermal Well ◽  
High Temperature Operation ◽  
Logging Tool ◽  
Fluid Flow Measurement

Abstract Geothermal logging tools are difficult to develop due to sustained high temperature operation. Recent commercial component offerings are significantly altering the high temperature geothermal tool problem. This paper implements a new baseline geothermal tool circuit working with five 225C, SOI components. An example tool including up to four spinners (fluid flow measurement), four analog inputs (for pressure, temperature or other sensors), EEPROM storage (program and data), FSK logic (wireline data transmission), and a high-speed UART (tool communication). Field updates of code and calibration constants are supported. Further, this paper demonstrates how the tool electronics can be expanded for more complex applications such as a geothermal well logging camera.

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