| 摘要 |
In the perforation of the wall (26) of a well, a number of perforating guns (15 to 16) are joined in series by a primer cord and then fired in sequence. A time delay unit is included in the cord immediately before the last gun (16), and the vibratory energy from the firing of the guns is detected (20, 24) and recorded (22), the presence of an appropriate delay before the final gun fire indicating that all guns have been duly detonated. |
