Method
Using well known leak verification method from process industry – tracer gas injected below plug and detectors at surface to identify leaks.
- Unambiguous result – testing in right direction from the reservoir to the external environment
- Exedra’s BalderTM system typically deployed with standard brigde plug used as base for final permanent well barrier plug.
- High pressure tracer gas is released from canister with pre-programmed differential pressure over barrier to be tested.
- Two-way communication between surface and downhole.
- Extreme sensitivity, low cost & quick response, enabling new lower cost plugging solutions, e.g.shorter plug lengths.
- Dual functionality depending on application: Monitoring of tracer detection, and/or pressure response monitoring
Specifications
| Parameters | Units | Data |
|---|---|---|
| Outer Diameter | In (mm) | 5 (127) |
| Lenght (including X-over) | In (m) | 984,3 (2,5) |
| Weight | kgs | 110 |
| Connections | N/A | Standard Oilfield Connections (X-over from Stub Acme) |
| Yield tensile load | Lbf | 400.000 lbf |
| Maximim compression load | Lbf | 400.000 lbf |
| Maximum torque through tool | Lbf | 5.000 ft.lbs |
| Gas Canister volume | L | 10 |
| Maximum Operating Pressure (Gas Canister) | Psi (bar) | 7500 (517,1) |
| Maximum Pressure Rating (Tool) | Psi (bar) | 10 000 (690) |
| Maximum Operating Temperature | deg C | 130 |
| Minimum Operating/Storage Temperature | deg C | -20 |
| Pressure Sensor accuracy | deg C | +/- 7 (+/- 0,5) |
| Temperature Sensor accuracy | Psi (bar) | +/- 3 |
| Calibrated temp range | deg C | 20-130 |
| Shock and vibration | deg C | As per AWES standard |
| Tool current consumption (idle) | g | 30 |
| Tool current consumption (while operating solenoid) | mA | 630 |
| Tool Operating Voltage (single battery pack) | V | 22 |
| Normal operational time | days | 7 |
Value
Verify shorter barriers, reduce section milling lengths from established standards using Balder to mitigate risk and proof a competent barrier is established
Enables deployment of new more cost-efficient plugging solutions – e.g.short Bismuth alloy barriers
Enabling unambiguous verification of competent barrier behind casing –including dual casings
Low cost, quick response and extreme sensitive unambiguous verification of sealed permanent barrier – tested in right direction towards the external environment
Range of applications
