The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 10, 2013
Filed:
Aug. 05, 2009
Peter O. Paulson, Calgary, CA;
Peter O. Paulson, Calgary, CA;
Pure Technologies Ltd., Calgary, Alberta, CA;
Abstract
The invention locates impaired sections of a pipeline, such as sections where the wall of the pipeline has been weakened or thinned. It provides a moveable device which passes through the pipeline and which has a first station. The moveable device has means to locate its position accurately. There is a second station, which is mounted either on the moveable device or in association with a fixed location on the pipeline wall. Either the first station or the second station has an acoustic or seismic pulse generator, and the other has a pulse receiver. The time taken for a pulse to travel from the pulse generator to the receiver is found to vary with the condition of the pipeline wall at the location where the moveable device is located at the time it receives (or sends) the pulse. The rate of change of velocity of the pulse as the device passes different locations in the pipeline is also found to vary with the condition of the pipeline wall at such location.