Here's a simple solution to an interesting problem some HydraSleeve users may experience.  It's quite rare, but there are times when a HydraSleeve is retrieved with a hole blown in the bottom.  This is caused from dissolved gas coming out of the solution as the sample is recovered.  Once the sleeve is full and the check valve closes, as it is recovered up the water column, the external water pressure decreases, much like opening a bottle of champagne.  The decreased external pressure allows the dissolved gasses in the sample to expand and, on rare occasions, to the point where the internal pressure exceeds the capacity of the sleeve.  The sleeve will typically burst at the point where the pressure is highest, the bottom of the sleeve.  

 The solution is to add a small vent hole at the top of the HydraSleeve at the top of the check valve so the trapped gas can escape during HydraSleeve retrieval.

The following videos show what happens when a HydraSleeve is pressurized from the inside and then the same situation with a vent hole added to the top of the sleeve.

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As you can see the vent hole solves the problem of trapped gas and the vented sleeve does not rupture.  If you think you have experienced this problem or that your sampling program may encounter this issue; just ask for a customized, vented, HydraSleeve. 

This is a simple solution for a simple problem utilizing HydraSleeves, as always....Simple by Design.

We have two new accessories to introduce today. 

When HydraSleeves are used for the size well they are intended - for example, when using 2-inch HydraSleeves in 2-inch wells - they fill in a 1:1 ratio.  When retrieving the HydraSleeve through the water column, most of the water is forced into the filling bag because the water is constricted by the diameter of the well screen.  Therefore a 30-inch HydraSleeve will capture a core sample of water from the 30 inch area directly above where the top of the HydraSleeves sits in the well.

If you try to use a 2-inch HydraSleeve in a 4-inch well, a lot of the water can escape around the outside of the filling HydraSleeve - it's not forced in as fast as it would be when used in a 2-inch well.   Previously we have recommended oscillating the HydraSleeve several times before retrieving them so that you can be sure the sleeve filled within the intended zone.  

Now we are introducing a new top attachment that will mimic the mouth of a 4-inch bag.  This 4- to 2-inch Adapter for use with our 2-inch Super/SkinnySleeve will allow you to have the same fill rate as if you were using a 4inch bag in the 4-inch well without repeated oscillation.   The sleeve is threaded between the top reducer and locking ring - follow the instructions for the assembly of the Super/SkinnySleeve PVC Collars.

       4-2" WIDE MOUTH ADAPTER 2.75" OD COMES WITH 4" SPRING CLIP $47.00 

      ORDER HERE

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  As you can imagine, if the fill rate is slower when 2-inch diameter HydraSleeves are used in the constricted environment of a 4-inch well; the same is exponentially true for HydraSleeves being used in a tank, lake, pool or any surface water sampling.

The new SWA (Surface Water Adapter) will get the job done in a 6-inch well or larger.  For the Surface Water Adapter we added an even wider mouth to the top of the smaller adapter seen above in order to accommodate larger diameter wells, surface water and tank sampling.

    SWA - SURFACE WATER ADAPTER 5-INCH OD - $74.00         

   ORDER HERE

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  Both of these adapters require check valve activation with just one oscillation of the sleeve through the desired sampling zone.  Pull up on the line ~3 feet; allow it to drop back to the starting point; and then recover to the surface.  A HydraClamp will come in handy when removing the sleeve from the top adapter.  Place the clamp on the outside of the bag at the check valve to form a water tight seal.  Then remove the SWA or 4-2" Adapter and decant the sample into your lab's vials by following the instructions in the HydraSleeve Field Manual. 

Download the 1-sheet instruction for both of these adapters by clicking here.  Wide Mouth/SWA Instructions

What's in your well?

Introducing a simple way to find out - the NEW Cordry Core Sampler.

Collecting a continuous, sequential core sample from a long well screen in a 2-inch well is typically a difficult and potentially expensive task. Previously, long HydraSleeves and SuperSleeves that could carry out this job were heavy and unwieldly, and our recommendation was that retrieval should be accomplished with at least two people. Alternatively, discrete interval samples from long well screens could be taken by deploying multiple samples at the various intervals. To provide a simpler and less expensive option, GeoInsight has developed the Cordry Core Sampler.

The Cordry Core Sampler will collect a continuous, sequential core sample to vertically profile a water column. It is a thin sleeve that allows it to be easily deployed and retrieved with minimal strain or effort. Once retrieved, the sample in the sleeve will mirror the column of water in the well. Concentrations from different intervals are not mixed and can be isolated using special clamps applied to the outside of the sleeve.

Please click the link below for the white paper that describes this new product in detail.

The_New_Cordry_Core_Sampler_Final.pdf

The Cordry Core will be custom made per application, based on the well specs (2-inch diameter wells only) and customer needs. 

Please give us a call 800-996-2225 or email This email address is being protected from spambots. You need JavaScript enabled to view it. for more information.