Feasibility Analysis of Reverse Sealed Testing String in HPHT Wells

Abstract:

To solve problems met in an offshore High-Pressure High-Temperature (HPHT) well testing, a new technology is put forward—placing seal bore extension above permanent packer, and the upper landing tools being connected with seal bore extension through shear pins. This method gives a reverse position of seal bore extension compared with conventional way in which seal bore extension is below permanent packer. So, the feasibility must be considered. Two technological procedures, testing before cutting pins and testing after cutting pins, are discussed, and the highlight is on axial force and deformation of testing string at crucial moments. Results indicate that this new technology is feasible. Of the two technological procedures, axial force is the key factor when testing before cutting pins and axial deformation is the key factor when testing after cutting pins. Conclusions have been used in an offshore HPHT well testing design.

• Periodical: Applied Mechanics and Materials (Volumes 556-562)
• Pages: 2761-2764
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.556-562.2761
• Online since: May 2014
• Authors: Bao Kui Gao*, Wei Wang, Xing Qin
• Keywords: High-Pressure, High-Temperature, Offshore, String, Well Testing

References

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