Method and device for testing gas carrying pipelines
First Claim
1. Device for testing a gas-carrying pipeline by ultrasound, the device having an ultrasonic pig freely movable through the pipeline to be tested, the ultrasonic pig having a sensor carrier to move through the pipeline and at least one scraper sleeve, the sensor carrier carrying ultrasonic sensors and the at least one scraper sleeve being positioned upstream of the sensor carrier and connected with the sensor carrier, the ultrasonic pig being further provided with a liquid conducting tube having an inlet upstream of the at least one scraper sleeve within the pipeline to be tested and an outlet downstream of said at least one scraper sleeve, the device further having a pump, to move through the pipeline, and the pump is provided between the inlet and the outlet of said tube on the movable ultrasonic pig to pump liquid in the pipeline from upstream of the at least one scraper sleeve to the outlet.
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Accused Products
Abstract
For reducing the coupling liquid carried along during the performance of a test run of a device for testing gas carrying pipelines, the invention provides an ultrasonic gas carrying pipeline testing method, in which an overpressure is produced in a space containing a sensor carrier with ultrasonic sensors and a coupling liquid defined by the pipeline wall and scraper sleeves. An ultrasonic gas carrying pipeline testing device with a sensor carrier and a scraper sleeve positioned upstream thereof and connected thereto is characterized in that a connecting line (24) provided with a pump (26) passes from an area upstream of the scraper sleeve (22) to an area downstream of said scraper sleeve (22).
35 Citations
12 Claims
- 1. Device for testing a gas-carrying pipeline by ultrasound, the device having an ultrasonic pig freely movable through the pipeline to be tested, the ultrasonic pig having a sensor carrier to move through the pipeline and at least one scraper sleeve, the sensor carrier carrying ultrasonic sensors and the at least one scraper sleeve being positioned upstream of the sensor carrier and connected with the sensor carrier, the ultrasonic pig being further provided with a liquid conducting tube having an inlet upstream of the at least one scraper sleeve within the pipeline to be tested and an outlet downstream of said at least one scraper sleeve, the device further having a pump, to move through the pipeline, and the pump is provided between the inlet and the outlet of said tube on the movable ultrasonic pig to pump liquid in the pipeline from upstream of the at least one scraper sleeve to the outlet.
Specification