Pipeline caliper pig
US5088336A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1991 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | Jun 5, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B5/207
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved pipeline caliper pig for providing a record of the deviations of the interior wall of a pipeline including a pig body assembly having a longitudinal axis and support members so that the pig body assembly is supported within a pipeline, the support members impeding the flow of fluid therepast so that the pig body is propelled by fluid flow along the interior of the pipeline, an integrator plate carried by the pig body assembly, arms extending from the pig body assembly for responding to deviations in the interior wall of the pipeline and coupling members to transfer the deviations to the integrator plate, a plurality of axially positionable shafts affixed at one end of the integrator plate, and electrical transducers at the other end of each shaft so that movement of the integrator plate relative to the pig body is transmitted into electrical signals, an orientation detection member and a signal receiver and recorder to record the electrical signals of the transducers and the orientation detection member so that deviations in the interior wall of the pipeline and the orientations of such deviations relative to the vertical are recorded as electrical signals, the recorded…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.