Pipeline bend verification pig
US4780962A · kind A · utility
8Cited by
6References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 5, 1983 |
| Grant date | Nov 1, 1988 |
| Priority date | — |
| Expiry date | Dec 5, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B5/207
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pipeline pig device comprises a longitudinal housing of given length, having adjacent each end a substantially centralizing packer or seal by which pipeline fluids may be used to propel the device. Intermediate the longitudinal housing are a plurality of outwardly extending feeler arms which ride against the pipeline interior. Movement of the feeler arms caused by the pig traversing bends, miters or other deviations from straight, round pipe are transmitted to a recording system which, in combination with odometers, will provide information and/or changes in such bends.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.