The Speedbag (US Patent No. 9,726,013; No. 6,481,300; No. 6,837,120; others pending) is a new version of our standard HydraSleeve that minimizes drag down when placing the SpeedBag HydraSleeve in the well.
900 mls SpeedBag specs: 37 inches long and 1.75" O.D. when full; made for 2" schedule 40 and larger wells; they will hold approximately 900 mls of sample volume
500 mls SpeedBag specs: 30 inches long and 1.5" O.D. when full; made for 2" schedule 80 and larger wells; they will hold approximately 500 mls of sample volume
No waiting! No equilibration time! Immediate retrieval! Purchase fewer weights for one job!
Save even more on your groundwater sampling programs!
The video seen below shows the effects of a (modified HydraSleeve) Speedbag on mixing in the water column when deployed in a 2-inch schedule 40 well.
*YouTube link to the speedbag video: http://youtu.be/KKopRzfmMhk?list=UUDE2hIItViGS0ZTbsBS3AMQ
The video illustrates the minimal mixing that occurs when a Speedbag is deployed and immediately recovered in a 2-inch schedule 40 well. The results confirm that the Speedbag can be deployed and recovered in a 2-inch schedule 40 well to collect a formation quality sample from the well screeen without waiting for the well to re-stabilize. Tests show that the SpeedBag will displace 1 inch of water when it is placed in the 2-inch, schedule 40 well (empty).
Speedbags collect the same kind of sample as a standard HydraSleeve - they both collect a whole water sample suitable for almost any analysis.
The SpeedBag will require an additional step when retrieving from the well. While the hole above the check valve allows water to flow freely past while the bag is being installed, it also does not allow for immediate full opening of the check valve on retrieval. Speedbags require activation of the check valve and oscillation during recovery. To pop open the check valve, please be sure to pull up hard 1 to 2 feet once on the tether, let the assembly drop back down to the starting point, REPEAT THIS PROCESS 4 TIMES, and then steadily recover the SpeedBag through the well screen to the surface.
Advantages to non-stop (in/out) sampling with no well equilibration time using the Speedbag:
- For the first deployment at a new site, the user can collect the first sample using the Speedbag and then leave a fresh standard HydraSleeve or SpeedBag in the well screen to be recovered for the next round of sampling.
- Immediate recovery will allow for significant time savings when conducting comparison studies. Just one trip to the well when comparing HydraSleeves to pumped samples.
- Where budgets are tight one weight can be utilized to sample all wells. There is no need to have one weight per well; simply decontaminate the same weight and reuse it for all of the wells.
- The in/out method utilitzed with the Speedbag reduces sample turbidity. It only collects sediment that is suspended in the sample zone at the time of collection. This eliminates the accumulation of in-well sediment on top of the sampler over time.
- A 900 mls sample can be collected from any open well (2-inch schedule 40 and larger) at any time with sampling equipment that fits in your tool box. Please remember to oscillate the Speedbag several times when using these in wells that are larger than 2 inch diameter (click for details)
- A smaller 500 mls (the original) SpeedBag is still available for smaller sample volumes (2-inch schedule 80 and larger)
- Either of these SpeedBags can be easily shortened to recover less sample volume. There is even a weld mark along the side of the 900 mls SpeedBag which marks the size needed to collect 500 mls of sample. See instructions on shortening any HydraSleeve by clicking here. Note: A shorter bag means less drawdown.
- Currently the minimum well diameter is 2-inch schedule 80 with a maximum sample volume of about 900 mls.
- Has only been tested using a 2-inch Speedbag; has not been tested for 4-inch units. (However, you can use this in/out method with any 2-inch, bottom-weighted HydraSleeve in a 4-inch well and immediately recover the sample without mixing, just remember to oscillate the HydraSleeve on recovery.)
- When using the SpeedBag you must pull up hard 1 to 2 feet once on the tether to pop open the check valve; let the assembly drop back down to the starting point, repeat this process 4 times, and then steadily recover through the well screen to the surface.
- The Speedbag is not intended for any top-weighted configurations.
- The SpeedBag can also be shortened for less sample volume or shorter saturated screens.
- The SpeedBag should be cycled up and down (in addition to the initial pull to activate the check valve) to collect samples in short water columns.
Cost for both sizes of SpeedBags (US Patent No. 9,726,013, No. 6,481,300; 6,837,120; others pending) are $35. Reusable bottom weights to be used with these Speedbags run between $12 and $25. Spring Clips ($3.00) must be used with the Speedbag. After decontamination, the weight and clips can be moved from well to well if you so choose. The initial material cost to immediately retrieve 900 mls of sample volume using this set up will be about ~$60 - and much less if the cost of one weight is divided by the total number of wells on the site.