In-situ measurement system
Creators
Description
A multipurpose in situ underground measurement system comprising a plurality of long electrical resistance elements in the form of rigid reinforcing bars, each having an open loop ''hairpin'' configuration of shorter length than the other resistance elements. The resistance elements are arranged in pairs in a unitized structure, and grouted in place in the underground volume. The electrical resistance of each element and the difference in electrical resistance of the paired elements are obtained, which difference values may be used in analytical methods involving resistance as a function of temperature. A scanner sequentially connects the resistance-measuring apparatus to each individual pair of elements. A source of heating current is also selectively connectable for heating the elements to an initial predetermined temperature prior to electrical resistance measurements when used as an anemometer
Availability note (English)
U.S. Commissioner of Patents, Washington, D.C. 20231, USA, $.50.Additional details
Publishing Information
- Imprint Pagination
- v p.
- IPC:
- Int. Cl. E21B 49/00; G01F 1/68; H01G 3/04.
- IPC
- Int. Cl. E21B 49/00; G01F 1/68; H01G 3/04.
- Patent number
- US patent document 4,420,974/A/
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 16002531
- Subject category
- S07: ISOTOPES AND RADIATION SOURCES;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- ANEMOMETERS; ELECTRIC CONDUCTIVITY; HYDRAULIC CONDUCTIVITY; OPERATION; ROCKS; SPECIFICATIONS; TEMPERATURE DEPENDENCE; THERMAL DIFFUSIVITY; THERMOMETERS; UNDERGROUND; WELL LOGGING; WELL LOGGING EQUIPMENT
- Descriptors DEC
- ELECTRICAL PROPERTIES; EQUIPMENT; LEVELS; MEASURING INSTRUMENTS; PHYSICAL PROPERTIES; THERMODYNAMIC PROPERTIES
Optional Information
- Notes
- PAT-APPL-209929.