|
| Failure of Spring Pressure Gage and Mercury Corrosion in Gas Field |
| Received:August 17, 2017 Revised:December 15, 2017 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2017.12.001 |
| KeyWord:spring pressure gage leaking mercury corrosion gas field |
| Author | Institution |
| LIN Guan-fa |
Tubular Goods Research Institute, CNPC, Xi'an , China |
| WANG Jun-qi |
Tarim Oilfield Company, CNPC, Korla , China |
| MA Jin-long |
Tarim Oilfield Company, CNPC, Korla , China |
| SONG Cheng-li |
Tubular Goods Research Institute, CNPC, Xi'an , China |
| DING Han |
Tarim Oilfield Company, CNPC, Korla , China |
| LI Lei |
Tubular Goods Research Institute, CNPC, Xi'an , China |
|
| Hits: |
| Download times: |
| Abstract: |
| Objective To analyze causes for leaking of spring tube of pressure gage based on leaking of pressure gage of certain gas field. Methods The inner structure and surface damage of spring tube were observed, and the damage regions were detected with permeating method of nondestructive testing, metallographic microscope, scanning electron microscope (SEM) and energy dispersive spectrometer (EDS). Results There was a penetrative crack extending along the crystal in the tube. The mercury element and a bit of CO2 corrosion product were detected in the mixing region between and on the crystal grains. Conclusion The leaking of spring tube in the pressure gage is resulted from the mercury corrosion that the Al and Cu elements in the spring tube made from Monel alloy formed amalgam with Hg in the gas and the cracking of the tube under the inner pressure action. |
| Close |
|
|
|