- When activated, the HydraSleeve collects a sample from a very defined interval in the well with minimal agitation and no displacement. When full it seals itself, isolating the sample from fluid from other zones. HydraSleeve provides a simple method for collecting a water sample from a defined vertical and horizontal interval within the well.
- Dye studies show that bailers, including dual check valve bailers, will not retain a sample from a specified interval. Any change in recovery speed results in the momentum of the sample in the bailer to continue upward and out the top of the bailer. Simultaneously, water enters the bottom of the bailer to replace the water exiting the top. In short, the bailer continuously pumps itself during recovery (picture a very short inertial lift pump). Only when the top of the bailer clears the water table does the sample become Ã¢â‚¬Å“heavyÃ¢â‚¬Â enough to seat the bottom check valve, sealing the fluid in the bailer as it is recovered through the air in the casing.