Magnetic detection of underground pipe using timed-release marking droplets
A system and method are disclosed of detecting an underground pipe by injecting magnetic marking droplets into the underground pipe which coat the inside of the pipe and may be detected from aboveground by a magnetometer. The droplets include a non-adhesive cover which allows free flow through the pipe, with the cover being ablatable for the timed-release of a central core containing magnetic particles which adhere to the inside of the pipe and are detectable from aboveground. The rate of ablation of the droplet covers is selectively variable to control a free flowing incubation zone for the droplets and a subsequent deposition zone in which the magnetic particles are released for coating the pipe. 6 figs.
- Research Organization:
- Associated Universities Inc
- DOE Contract Number:
- AC02-76CH00016
- Assignee:
- Associated Universities, Inc., Washington, DC (United States)
- Patent Number(s):
- US 5,585,725/A/
- Application Number:
- PAN: 8-421,567
- OSTI ID:
- 415743
- Country of Publication:
- United States
- Language:
- English
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