Depression differential sub
The single or twin port-less is used in perforating systems to provide an economical method of achieving the required depression between the tubing string and the well formation. The device includes a high-strength ceramic dome-shaped cup (or two dome-shaped cups), preventing communication between the tubing and annular space prior to discharge from the surface of the initiating rod. The dome cup holds pressure up to 10,000 psi below the device (in the twin design, pressure is held above and below the device). A depression differential sub is installed in the tubing string, typically above or below the packer to create the required depression, and prevents fluid from entering the tubing string.
- Sizes
- 3
- Equipment line
- Downhole equipment
Design advantages
- Economical alternative to profile nipple with a BLANKING PLUG.
- Full-bore opening the inner diameter after ceramic dome are removed.
- Application as a barrier for activation of hydraulic equipment.
- High temperature properties.
- Allows for tubing tests up to 10,000psi (68.9MPa).
- Application in the environment with H2S and CO2.
Sizes and specifications
3 sizes, 4 parameters
| Size | Tubing ODmm | Outer diameter max.mm | Inner diametermm | Working pressureMPa |
|---|---|---|---|---|
| 2 3/8" | 60,325 | 85 | 50 | 68,9 |
| 2 7/8" | 73,025 | 93,2 | 63,5 | 68,9 |
| 3 1/2" | 88,9 | 114,3 | 76,2 | 68,9 |
Non-standard sizes are made to order — send the well parameters.
Documents
Datasheetin preparationCertificate of conformityin preparationOperating manualin preparationRelated equipment
PL1-XPackerPL-CPackerPT-2Model "PT-2" On-Off ToolThe Latch Seal the permanent packer (Permapack)PL-XASliding Sleeve (SSD)All products in this lineRequest · PL-DS
We reply within one business day.