QUALITY TUBING, INC. Patent applications |
Patent application number | Title | Published |
20130092279 | COILED TUBING WITH IMPROVED FATIGUE RESISTANCE AND METHOD OF MANUFACTURE - New methods of manufacturing coiled tubing result in increased useful life of the coiled tubing string by creating an enhanced strip-to-strip weld zone having load bearing and/or fatigue resistance properties substantially equal to or greater than the load bearing and/or fatigue resistance properties of the strip base material. The enhanced weld zone is transition into the nominal tubing to reduce stress concentration. | 04-18-2013 |
20120118426 | COILED TUBING WITH IMPROVED FATIGUE RESISTANCE AND METHOD OF MANUFACTURE - New methods of manufacturing coiled tubing result in increased useful life of the coiled tubing string by creating an enhanced strip-to-strip weld zone having load bearing and/or fatigue resistance properties substantially equal to or greater than the load bearing and/or fatigue resistance properties of the strip base material. The enhanced weld zone is transition into the nominal tubing to reduce stress concentration. | 05-17-2012 |