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 stepsLoading pointInternal pressure (MP)Axial mechanical load (kN)Total axial load (kN)Test temperature (°C)Holding time (min)

11016461646Ambient temperature5
225012901646Ambient temperature10
33500395Ambient temperature1
4450−1175−779Ambient temperature5
5550−1602−1206Ambient temperature10
66−1557−1557Ambient temperature5
7450−1175−779Ambient temperature10
83500395Ambient temperature1
925012901646Ambient temperature10
101016461646Ambient temperature5