Detection, diagnosis, and prognosis in geothermal well technology

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Description

For successful and safe operation of a geothermal well, the condition of the casing and cement must be accurately determined. Measurements on casing wall thickness, corrosion damage, holes, cracks, splits, etc., are needed to assess casing integrity. Cement bond logs are needed to detect channels or water pockets in cement behind pipe and to determine the state of the cement bond to the pipe and formation. Instrumentation for making such measurements is limited by the temperature capabilities (<175/sup 0/C) of existing logging equipment developed for the oil and gas industry. The instruments that are needed for geothermal casing and cementing ... continued below

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Pages: 11

Creation Information

Veneruso, A.F. & Chang, H.T. January 1, 1980.

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Description

For successful and safe operation of a geothermal well, the condition of the casing and cement must be accurately determined. Measurements on casing wall thickness, corrosion damage, holes, cracks, splits, etc., are needed to assess casing integrity. Cement bond logs are needed to detect channels or water pockets in cement behind pipe and to determine the state of the cement bond to the pipe and formation. Instrumentation for making such measurements is limited by the temperature capabilities (<175/sup 0/C) of existing logging equipment developed for the oil and gas industry. The instruments that are needed for geothermal casing and cementing inspection are reviewed; the principle deficiencies in their high temperature use are identified; and Sandia's upgrade research program on multi-arm caliper and acoustic cement bond logging tool is described. The key electronic section in a multi-arm caliper will consist of 275/sup 0/C circuits. In an acoustic cement bond logging tool, a simple circuit with possibilities of using commercially available components for high temperature operation is being developed. These new tools will be field tested for operation at a minimum temperature of 275/sup 0/C and pressure of 7000 psi for up to 1000 hours.

Physical Description

Pages: 11

Notes

NTIS, PC A02/MF A01.

Source

  • 32. meeting of the mechanical failures prevention group, Santa Monica, CA, USA, 7 Oct 1980

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  • Report No.: SAND-80-2026C
  • Report No.: CONF-801059-1
  • Grant Number: AC04-76DP00789
  • Office of Scientific & Technical Information Report Number: 5145375
  • Archival Resource Key: ark:/67531/metadc1052768

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 1, 1980

Added to The UNT Digital Library

  • Jan. 22, 2018, 7:23 a.m.

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  • Feb. 2, 2018, 1:18 p.m.

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Veneruso, A.F. & Chang, H.T. Detection, diagnosis, and prognosis in geothermal well technology, article, January 1, 1980; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc1052768/: accessed June 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.