Study of Metal Seal of Coiled Tubing Wellhead Hanging Device
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.
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