Many people like to use this product while sweeping the wellbore for seepage or lost circulation. The problem with this method is that you will likely not find the appropriate zone to be healed if you pump your sweep too far up the wellbore where you will end up losing your product over the shaker.
With that being said, the way that I have used a similar product (Poly Seal) is to 1) mix the desired pounds per barrel (ppb) in a slugging barrel with Soda Ash to activate it (since it needs approximately a 10pH to activate and fully hydrate, 2) identify the appropriate thief zone, and 3) count your pump strokes and spot the pill in the thief zone. Many people believe that the losses are occuring in the zone that you are currently drilling and while this is possible, you are better off spotting this product (and other LCM/LPM products) with a target objective that includes knowing where your last casing shoe is. Approximately 60% of all loss/seepage issues occur immediately below your last casing shoe and/or in the weakest formation below your last casing shoe.
You can attempt this spotting method twice before trying the same method a 3rd time and “gently” squeezing the poly seal back into the formation in the thief zone(s). The great thing about this type of product (in theory) is that it allows you to place a smaller particle size distribution material (before it has fully hydrated) into a tiny fracture and then it swells thus combatting your seepage or loss issues. The bad part about this type of material is that it remains flexible and never hardens and can be subject to being lost/ineffective as a result.
We have developed similar product named PLUG and introduce in HDD mud chemicals market with very good feedback.
Chengxin Oilfield Chemcials
