One of the reasons we are developing the new Skinny SuperSleeves is that our normal SuperSleeves will not fit in 2-inch, Schedule 80 wells. They were designed to fit tightly in the more common 2-inch, Schedule 40 well. Although we have posted notes in all of our normal SuperSleeve documentation, some customers have still tried to use the SuperSleeve in 2-inch Schedule 80 wells.
Sometimes it's not immediately app
arant that you have schedule 80 wells.
They can be difficult to identify especially if white pvc was used (not gray). In the picture here it's almost impossible to identify which pipe is schedule 40 and which is schedule 80; imagine trying to identify this without a side-by-side comparison.
When we hear that customers are having difficulty in deploying the SuperSleeves in the well, we can almost always identify the problem. It is very likely that the customer is trying to use a normal SuperSleeve in a 2-inch, schedule 80 well. The top weight will fit, but it's very tight and there is no room between the weight and wall of the schedule 80 pipe, as seen in the photo here.
As you can see they were designed for a tight fit in the schedule 40 pipe. In order for the SuperSleeve to work properly there must be some gap or play between the outside diamter of the top weight and the inside diamter of the casing.
When the SuperSleeve is full of water it will have a larger outside diameter than the top weight. It will protrude slightly from the edge of the top weight and thefore we must have room for the sleeve to fill.
As seen in the photo there is no room for this expansion if the SuperSleeve is used in a schedule 80 well. IF the SuperSleeves do actually get installed in the schedule 80 wells, it will be a most difficult task. At this point there will be another problem when they are retrieved. When the assembly is activated and the bag fills, it will be almost impossible to retrieve. Most likely the bag will be forced to rupture and no sample will be retrieved.
We cannot emphasize this point enough:
PLEASE DO NOT USE NORMAL SUPERSLEEVES IN 2-INCH SCHEDULE 80 WELLS, IT WILL NOT WORK!
