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Keywords: internal leak
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Proceedings Papers

Paper presented at the IADC/SPE International Drilling Conference and Exhibition, March 8–10, 2022
Paper Number: SPE-208785-MS
... means that three leak constants are needed for premium connections. A plot of the leak limit curve superimposed on the pipe-body yield envelope shows load combinations where leak occurs before the pipe yields. A key conclusion is that internal leak cannot occur without tension for the loads investigated...
Proceedings Papers

Paper presented at the SPE/IADC International Drilling Conference and Exhibition, March 8–12, 2021
Paper Number: SPE-204130-MS
... for axial force, backup pressure, and thread shear. The API equation for internal leak does not include any of these effects. The axial stress at any location in a threaded connection is not determined from axial force F alone but needs to also include the "piston" forces on the exposed areas in Fig...
Proceedings Papers

Paper presented at the IADC/SPE International Drilling Conference and Exhibition, March 3–5, 2020
Paper Number: SPE-199651-MS
... on backup pressure is shown to be significant and suggests that qualification testing of any connection for leak, without backup pressure, is not adequate. piping simulation internal leak Leak compression backup pressure contact pressure stab flank pin-end effect dependence piping design...
Proceedings Papers

Paper presented at the SPE/IADC International Drilling Conference and Exhibition, March 5–7, 2019
Paper Number: SPE-194059-MS
... Abstract The existing API equation for internal leak predicts the internal pressure to overcome the pin-box contact pressure generated from the makeup interference plus the energizing effect of internal pressure which enhances the seal. For threaded connections, internal and external pressures...

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