Armored instrumentation cable for geothermal well logging
Multiconductor armored well-logging cable is used extensively by the oil and natural gas industry to lower various instruments used to measure the geological and geophysical parameters into deep wellbores. Advanced technology in oil-well drilling makes it possible to achieve borehole depths of 9 km (30,000 ft). The higher temperatures in these deeper boreholes demand advancements in the design and manufacturing of wireline cable and in the electrical insulating and armoring materials used as integral components. If geothermal energy is proved an abundant economic resource, drilling temperatures approaching and exceeding 300/sup 0/C will become commonplace. The adaptation of teflons as electrical insulating material permitted use of armored cable in geothermal wellbores where temperatures are slightly in excess of 200/sup 0/C, and where the concentrations of corrosive minerals and gases are high. Teflon materials presently used in wireline cables, however, are not capable of continuous operation at the anticipated higher temperatures.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6086038
- Report Number(s):
- LA-UR-81-3345; CONF-811213-2; ON: DE82004332
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
150303* -- Geothermal Exploration & Exploration Technology-- Exploratory Drilling & Well Logging
440400 -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
BOREHOLES
CABLES
CAVITIES
CONDUCTOR DEVICES
ELECTRIC CABLES
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATION
EQUIPMENT
FLUORINATED ALIPHATIC HYDROCARBONS
GEOTHERMAL WELLS
Geothermal Legacy
HALOGENATED ALIPHATIC HYDROCARBONS
HIGH TEMPERATURE
MATERIALS
MATERIALS TESTING
OPERATION
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYETHYLENES
POLYMERS
POLYOLEFINS
POLYTETRAFLUOROETHYLENE
SYNTHETIC MATERIALS
TEFLON
TESTING
WELL LOGGING EQUIPMENT
WELLS