Appparatus for pressure testing of tubulars
US5563336A · kind A · utility
Inventor
Key dates
| Filing date | Sep 13, 1995 |
| Grant date | Oct 8, 1996 |
| Priority date | — |
| Expiry date | Sep 13, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/223
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for pressure testing of tubulars. The apparatus comprises a tester body having multiple spaced-apart external circumferential seal elements expansible by piston movement; a seal gas saver valve connected to the tester body; and a pressurized seal and test gas source to supply gas to the tester. The tester body is inserted into a tubular so that the seal elements are astride a desired test area, typically a tubular connection. Seal gas pressure is then applied to move the pistons and expand the seal elements against the tubular wall, forming a test chamber. Test gas is then introduced into the chamber to achieve a desired pressure, and external containment and sensing means are used to detect any escape of test gas, thereby showing a leak. When the test is complete, the test gas pressure is released, and the seal gas pressure is reduced, with the seal gas flowing back into a reclamation tank. When a desired seal gas retention pressure is reached, the seal gas saver valve closes, maintaining the pressure in the seal gas supply line and venting the small remaining seal gas volume in the tester body. Damage to the tester seal elements by excessive piston travel is prevente…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.