Study of Metal Seal of Coiled Tubing Wellhead Hanging Device


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A U-shaped metal seal in coiled tubing wellhead hanging device was designed, the metal seal material is brass(H59, H70). The contact stress of sealing interface was analyzed by finite element method analysis, the U-shaped seal has elastic-plastic deformation after excitation force applied, and the plastic deformation region concentrated in contact areas. The influence of U-shaped metal seal initial clearance on sealing effect was presented, the reasonable initial clearance ratio region are 0.8 to 0.9. Excitation forces in different excitation angles were calculated, the reasonable excitation angle region are 15° to 20°. Metal seal overcomes the defects of conventional rubber elastomers, that ensure the safety of wellhead hanging device construction, also improve the service life.



Edited by:

Fangping Zhang




X. Y. Zhang and W. G. Ma, "Study of Metal Seal of Coiled Tubing Wellhead Hanging Device", Applied Mechanics and Materials, Vol. 628, pp. 133-136, 2014

Online since:

September 2014




* - Corresponding Author

[1] Garry Garfield, Gordon Mackenzie, Recent Metal-to-Metal Sealing Technology for Zonal Isolation Applications Demonstrates Potential for Use in Hostile HP/HT Environments, J. SPE/IADC Drilling Conference. (2007) 1-4.


[2] Upul S Fernando, Phil Nott, Geoff Graham, Andy E Roberts, Terry Sheldrake, Experimental Evaluation of the Metal-to-Metal Seal Design for High Pressure Flexible Pipes, J. Offshore Technology Conference. (2012) 1-8.


[3] Chuan Cao, Pull-up Metal Seal System for Subsea Wellhead Equipment, J. Proceedings of the Twenty-third International Offshore and Polar Engineering. (2013) 34-39.