Method and apparatus for remote tube crevice detection by current and voltage probe resistance measurement
Patent
·
OSTI ID:868556
- Pittsburgh, PA
A method and apparatus for determining the extent of contact between an electrically conducting tube and an electrically conductive tubesheet surrounding the tube, based upon the electrical resistance of the tube and tubesheet. A constant current source is applied to the interior of the electrically conducting tube by probes and a voltmeter is connected between other probes to measure the voltage at the point of current injection, which is inversely proportional to the amount of contact between the tube and tubesheet. Namely, the higher the voltage measured by the voltmeter, the less contact between the tube and tubesheet.
- Research Organization:
- WESTINGHOUSE ELECTRIC CORP
- DOE Contract Number:
- AC11-76PN00014
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 5166627
- OSTI ID:
- 868556
- Country of Publication:
- United States
- Language:
- English
Similar Records
Method and apparatus for remote tube crevice detection by current and voltage probe resistance measurement
Determining resistivity of a formation adjacent to a borehole having casing with an apparatus having all current conducting electrodes within the cased well
Method and apparatus for correcting eddy current signal voltage for temperature effects
Patent
·
1992
·
OSTI ID:7278097
Determining resistivity of a formation adjacent to a borehole having casing with an apparatus having all current conducting electrodes within the cased well
Patent
·
2000
·
OSTI ID:873784
Method and apparatus for correcting eddy current signal voltage for temperature effects
Patent
·
1989
·
OSTI ID:867240
Related Subjects
/324/
amount
apparatus
applied
based
conducting
conductive
conductive tube
conductive tubes
connected
constant
constant current
contact
crevice
current
current injection
current source
detection
determining
electrical
electrical resistance
electrically
electrically conducting
electrically conductive
extent
injection
interior
inversely
inversely proportional
measure
measured
measurement
method
namely
probe
probes
proportional
remote
resistance
resistance measurement
source
surrounding
tube
tubesheet
voltage
voltage probe
voltmeter
amount
apparatus
applied
based
conducting
conductive
conductive tube
conductive tubes
connected
constant
constant current
contact
crevice
current
current injection
current source
detection
determining
electrical
electrical resistance
electrically
electrically conducting
electrically conductive
extent
injection
interior
inversely
inversely proportional
measure
measured
measurement
method
namely
probe
probes
proportional
remote
resistance
resistance measurement
source
surrounding
tube
tubesheet
voltage
voltage probe
voltmeter