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Title: Precision pressure/temperature logging tool

Abstract

Past memory logging tools have provided excellent pressure/temperature data when used in a geothermal environment, and they are easier to maintain and deploy than tools requiring an electric wireline connection to the surface. However, they are deficient since the tool operator is unaware of downhole conditions that could require changes in the logging program. Tools that make ``decisions`` based on preprogrammed scenarios can partially overcome this difficulty, and a suite of such memory tools has been developed at Sandia National Laboratories. The first tool, which forms the basis for future instruments, measures pressure and temperature. Design considerations include a minimization of cost while insuring quality data, size compatibility with diamond-cored holes, operation in holes to 425 C (800 F), transportability by ordinary passenger air service, and ease of operation. This report documents the development and construction of the pressure/temperature tool. It includes: (1) description of the major components; (2) calibration; (3) typical logging scenario; (4) tool data examples; and (5) conclusions. The mechanical and electrical drawings, along with the tool`s software, will be furnished upon request.

Authors:
;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE Assistant Secretary for Energy Efficiency and Renewable Energy, Washington, DC (United States)
OSTI Identifier:
645495
Report Number(s):
SAND-98-0165
ON: DE98004418; TRN: AHC2DT03%%36
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Jan 1998
Country of Publication:
United States
Language:
English
Subject:
15 GEOTHERMAL ENERGY; ELECTRIC LOGGING; GEOTHERMAL WELLS; WELL PRESSURE; TEMPERATURE MONITORING; CALIBRATION; Geothermal Legacy

Citation Formats

Henfling, J A, and Normann, R A. Precision pressure/temperature logging tool. United States: N. p., 1998. Web. doi:10.2172/645495.
Henfling, J A, & Normann, R A. Precision pressure/temperature logging tool. United States. https://doi.org/10.2172/645495
Henfling, J A, and Normann, R A. 1998. "Precision pressure/temperature logging tool". United States. https://doi.org/10.2172/645495. https://www.osti.gov/servlets/purl/645495.
@article{osti_645495,
title = {Precision pressure/temperature logging tool},
author = {Henfling, J A and Normann, R A},
abstractNote = {Past memory logging tools have provided excellent pressure/temperature data when used in a geothermal environment, and they are easier to maintain and deploy than tools requiring an electric wireline connection to the surface. However, they are deficient since the tool operator is unaware of downhole conditions that could require changes in the logging program. Tools that make ``decisions`` based on preprogrammed scenarios can partially overcome this difficulty, and a suite of such memory tools has been developed at Sandia National Laboratories. The first tool, which forms the basis for future instruments, measures pressure and temperature. Design considerations include a minimization of cost while insuring quality data, size compatibility with diamond-cored holes, operation in holes to 425 C (800 F), transportability by ordinary passenger air service, and ease of operation. This report documents the development and construction of the pressure/temperature tool. It includes: (1) description of the major components; (2) calibration; (3) typical logging scenario; (4) tool data examples; and (5) conclusions. The mechanical and electrical drawings, along with the tool`s software, will be furnished upon request.},
doi = {10.2172/645495},
url = {https://www.osti.gov/biblio/645495}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 1998},
month = {Thu Jan 01 00:00:00 EST 1998}
}