Research Article
Experimental Study on Sealing Failure Mechanism of Injection-Production String in Underground Gas Storage under Cyclic Loading
Table 7
P110 13Cr B type tubing loading point for single reciprocating cycle gas seal test.
| Loading steps | Loading point | Internal pressure (MP) | Axial mechanical load (kN) | Total axial load (kN) | Test temperature (°C) | Holding time (min) |
| 1 | 1 | 0 | 1646 | 1646 | Ambient temperature | 5 | 2 | 2 | 50 | 1290 | 1646 | Ambient temperature | 10 | 3 | 3 | 50 | 0 | 395 | Ambient temperature | 1 | 4 | 4 | 50 | −1175 | −779 | Ambient temperature | 5 | 5 | 5 | 50 | −1602 | −1206 | Ambient temperature | 10 | 6 | 6 | | −1557 | −1557 | Ambient temperature | 5 | 7 | 4 | 50 | −1175 | −779 | Ambient temperature | 10 | 8 | 3 | 50 | 0 | 395 | Ambient temperature | 1 | 9 | 2 | 50 | 1290 | 1646 | Ambient temperature | 10 | 10 | 1 | 0 | 1646 | 1646 | Ambient temperature | 5 |
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