Magnetic detection of underground pipe using timed-release marking droplets
- Shoreham, NY
- Kew Garden Hills, NY
A system 10 and method of detecting an underground pipe 12 injects magnetic marking droplets 16 into the underground pipe 12 which coat the inside of the pipe 12 and may be detected from aboveground by a magnetometer 28. The droplets 16 include a non-adhesive cover 32 which allows free flow thereof through the pipe 12, with the cover 32 being ablatable for the timed-release of a central core 30 containing magnetic particles 30a which adhere to the inside of the pipe 12 and are detectable from aboveground. The rate of ablation of the droplet covers 32 is selectively variable to control a free flowing incubation zone 12a for the droplets 16 and a subsequent deposition zone 12b in which the magnetic particles 30a are released for coating the pipe 12.
- Research Organization:
- ASSOC UNIVERSITIES INC
- DOE Contract Number:
- AC02-76CH00016
- Assignee:
- Associated Universities, Inc. (Washington, DC)
- Patent Number(s):
- US 5585725
- Application Number:
- 08/421,567
- OSTI ID:
- 870741
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
10
12
12a
12b
16
28
30
30a
32
ablatable
ablation
aboveground
adhere
allows
allows free
central
central core
coat
coating
containing
containing magnetic
control
core
cover
covers
deposition
deposition zone
detectable
detected
detecting
detection
droplet
droplets
flow
flowing
free
free flow
free flowing
incubation
injects
inside
magnetic
magnetic detection
magnetic particle
magnetic particles
magnetometer
marking
marking droplets
method
non-adhesive
particles
pipe
rate
released
selectively
subsequent
subsequent deposition
timed-release
underground
underground pipe
variable
zone