| 摘要 |
<p>In a multiple perforating gun wherein each in a series of guns is successively fired, the firing arming the next gun in the series, resistors are provided in series with the gun actuating circuit in such a fashion, and in connection with surface control, readout, and recorder equipment, that the condition of the tool is continuously displayed and indicated, whereby a tally may be kept as to the exact guns fired, and down-the-hole irregularities such as shorts or open circuits may be evidenced.</p> |
