Research Article
Failure Analysis of Tubing Collapse in a Gas Well
Table 2
Chemical composition of failed tubing and the same batch of tubing without failure (wt.%).
| Element Sample | C | Si | Mn | P | S | Cr | Mo |
| Failed pipe body | 0.19 | 0.19 | 0.48 | 0.0063 | 0.0011 | 0.49 | 0.72 | The tubing body in the same batch | 0.19 | 0.19 | 0.48 | 0.0057 | 0.001 | 0.50 | 0.73 | Requirements of ordering technical agreement requirement | ≤0.35 | ≤0.50 | ≤1.20 | ≤0.015 | ≤0.003 | 0.10–1.60 | 0.20–1.20 |
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