ISKRA 86-MS mechanical firing head with automatic gun release is designed to initiate detonation chain of TCP jet perforating guns in oil and gas wells.
ISKRA-86-MS can be used in vertical and directional wells with the inclination angle not more than 45°. The head has got mechanical initiating mechanism. The drop bar thrown down into the well actuates the head initiating mechanism. After being initiated the head is automatically released from the tubing and the used gun is dropped to the bottom-hole allowing to carry out through-tubing technological tasks such as different geophysical surveys, frac stimulation and other tasks where the drift diameter 58 mm is required.
Specific Features
- Aer release of a used perforang gun it is possible to carry out hydrofrac without pulling out the tubing with a mechanical packer;
- No need to pull out the tubing for further operaons aer perforaon;
- Dri diameter 58 mm allows to make geophysical well logging;
- It no confirmaon of gun dropping down aer iniaon is obtained, it is allowed to shake the gun with TSh-V torpedo.
| Parameter | Value |
|---|---|
| ISKRA 86-MS | |
| Outside diameter, mm | 86 |
| Nominal tubing diameter, mm | Tubing 73 |
| Max hydrostac pressure, MPa | 80-140* |
| Min hydrostac pressure, MPa | 0,1 |
| Actuaon pressure range, MPa | 0,1-80 |
| Max allowable temperature, °C: | |
| 1 hour hold time; | 200 |
| 48 hour hold time; | 170 |
| 144 hour hold time; | 120 |
| Max borehole inclinaon angle, degree | 45 |
| Internal dri diameter aer gun release, mm, not less | 58 |
| Length, mm | 640 |
| Weight, kg | 14 |
| Load capacity, t, not more | 60 |
| Detonator type | DU-PP, percussion |
* Available under special order.